TTripleBuffer/Project1/easylogging++/easylogging++.h

//
//  Easylogging++ v9.80
//  Single-header only, cross-platform logging library for C++ applications
//
//  Copyright (c) 2015 muflihun.com
//
//  This library is released under the MIT Licence.
//  http://easylogging.muflihun.com/licence.php
//
//  easylogging@muflihun.com
//
//  https://github.com/easylogging/easyloggingpp
//  http://easylogging.muflihun.com
//  http://muflihun.com
//
#ifndef EASYLOGGINGPP_H
#define EASYLOGGINGPP_H
// Compilers and C++0x/C++11 Evaluation
#if defined(__GNUC__)
#   define ELPP_COMPILER_GCC 1
#   define ELPP_GCC_VERSION (__GNUC__ * 10000 \
                               + __GNUC_MINOR__ * 100 \
                               + __GNUC_PATCHLEVEL__)
#   if defined(__GXX_EXPERIMENTAL_CXX0X__)
#      define ELPP_CXX0X 1
#   elif(ELPP_GCC_VERSION >= 40801)
#      define ELPP_CXX11 1
#   endif  // defined(__GXX_EXPERIMENTAL_CXX0X__)
#endif  // defined(__GNUC__)
// Visual C++
#if defined(_MSC_VER)
#   define ELPP_COMPILER_MSVC 1
#   define ELPP_CRT_DBG_WARNINGS 1
#   if (_MSC_VER == 1600)
#      define ELPP_CXX0X 1
#   elif(_MSC_VER >= 1700)
#      define ELPP_CXX11 1
#   endif  // (_MSC_VER == 1600)
#endif  // defined(_MSC_VER)
// Clang++
#if defined(__clang__) && (__clang__ == 1)
#   define ELPP_COMPILER_CLANG 1
#   define ELPP_CLANG_VERSION (__clang_major__ * 10000 \
                                + __clang_minor__ * 100 \
                                + __clang_patchlevel__)
#   if (ELPP_CLANG_VERSION >= 30300)
#      define ELPP_CXX11 1
#   endif  // (ELPP_CLANG_VERSION >= 30300)
#endif  // defined(__clang__) && (__clang__ == 1)
// MinGW
#if defined(__MINGW32__) || defined(__MINGW64__)
#   define ELPP_MINGW 1
#endif  // defined(__MINGW32__) || defined(__MINGW64__)
// Cygwin
#if defined(__CYGWIN__) && (__CYGWIN__ == 1)
#   define ELPP_CYGWIN 1
#endif  // defined(__CYGWIN__) && (__CYGWIN__ == 1)
// Intel C++
#if defined(__INTEL_COMPILER)
#   define ELPP_COMPILER_INTEL 1
#endif
// Operating System Evaluation
// Windows
#if defined(_WIN32) || defined(_WIN64)
#   define ELPP_OS_WINDOWS 1
#endif  // defined(_WIN32) || defined(_WIN64)
// Linux
#if (defined(__linux) || defined(__linux__))
#   define ELPP_OS_LINUX 1
#endif  // (defined(__linux) || defined(__linux__))
// Mac
#if defined(__APPLE__)
#   define ELPP_OS_MAC 1
#endif  // defined(__APPLE__)
// FreeBSD
#if defined(__FreeBSD__)
#   define ELPP_OS_FREEBSD 1
#endif
// Solaris
#if defined(__sun)
#   define ELPP_OS_SOLARIS 1
#endif
// Unix
#if ((ELPP_OS_LINUX || ELPP_OS_MAC || ELPP_OS_FREEBSD || ELPP_OS_SOLARIS) && (!ELPP_OS_WINDOWS))
#   define ELPP_OS_UNIX 1
#endif  // ((ELPP_OS_LINUX || ELPP_OS_MAC || ELPP_OS_FREEBSD || ELPP_OS_SOLARIS) && (!ELPP_OS_WINDOWS))
// Android
#if defined(__ANDROID__)
#   define ELPP_OS_ANDROID 1
#endif  // defined(__ANDROID__)
// Evaluating Cygwin as *nix OS
#if !ELPP_OS_UNIX && !ELPP_OS_WINDOWS && ELPP_CYGWIN
#   undef ELPP_OS_UNIX
#   undef ELPP_OS_LINUX
#   define ELPP_OS_UNIX 1
#   define ELPP_OS_LINUX 1
#endif //  !ELPP_OS_UNIX && !ELPP_OS_WINDOWS && ELPP_CYGWIN
#if !defined(ELPP_INTERNAL_DEBUGGING_OUT_INFO)
#   define ELPP_INTERNAL_DEBUGGING_OUT_INFO std::cout
#endif // !defined(ELPP_INTERNAL_DEBUGGING_OUT)
#if !defined(ELPP_INTERNAL_DEBUGGING_OUT_ERROR)
#   define ELPP_INTERNAL_DEBUGGING_OUT_ERROR std::cerr
#endif // !defined(ELPP_INTERNAL_DEBUGGING_OUT)
#if !defined(ELPP_INTERNAL_DEBUGGING_ENDL)
#   define ELPP_INTERNAL_DEBUGGING_ENDL std::endl
#endif // !defined(ELPP_INTERNAL_DEBUGGING_OUT)
#if !defined(ELPP_INTERNAL_DEBUGGING_MSG)
#   define ELPP_INTERNAL_DEBUGGING_MSG(msg) msg
#endif // !defined(ELPP_INTERNAL_DEBUGGING_OUT)
// Internal Assertions and errors
#if !defined(ELPP_DISABLE_ASSERT)
#   if (defined(ELPP_DEBUG_ASSERT_FAILURE))
#      define ELPP_ASSERT(expr, msg) if (!(expr)) { \
          std::stringstream internalInfoStream; internalInfoStream << msg; \
          ELPP_INTERNAL_DEBUGGING_OUT_ERROR \
              << "EASYLOGGING++ ASSERTION FAILED (LINE: " << __LINE__ << ") [" #expr << "] WITH MESSAGE \"" \
              << ELPP_INTERNAL_DEBUGGING_MSG(internalInfoStream.str()) << "\"" << ELPP_INTERNAL_DEBUGGING_ENDL; base::utils::abort(1, \
                  "ELPP Assertion failure, please define ELPP_DEBUG_ASSERT_FAILURE"); }
#   else
#      define ELPP_ASSERT(expr, msg) if (!(expr)) { \
          std::stringstream internalInfoStream; internalInfoStream << msg; \
          ELPP_INTERNAL_DEBUGGING_OUT_ERROR\
             << "ASSERTION FAILURE FROM EASYLOGGING++ (LINE: " \
             << __LINE__ << ") [" #expr << "] WITH MESSAGE \"" << ELPP_INTERNAL_DEBUGGING_MSG(internalInfoStream.str()) << "\"" \
             << ELPP_INTERNAL_DEBUGGING_ENDL; }
#   endif  // (defined(ELPP_DEBUG_ASSERT_FAILURE))
#else
#   define ELPP_ASSERT(x, y)
#endif  //(!defined(ELPP_DISABLE_ASSERT)
#if ELPP_COMPILER_MSVC
#   define ELPP_INTERNAL_DEBUGGING_WRITE_PERROR \
       { char buff[256]; strerror_s(buff, 256, errno); \
       ELPP_INTERNAL_DEBUGGING_OUT_ERROR << ": " << buff << " [" << errno << "]";} (void)0
#else
#   define ELPP_INTERNAL_DEBUGGING_WRITE_PERROR \
        ELPP_INTERNAL_DEBUGGING_OUT_ERROR << ": " << strerror(errno) << " [" << errno << "]"; (void)0
#endif  // ELPP_COMPILER_MSVC
#if defined(ELPP_DEBUG_ERRORS)
#   if !defined(ELPP_INTERNAL_ERROR)
#      define ELPP_INTERNAL_ERROR(msg, pe) { \
          std::stringstream internalInfoStream; internalInfoStream << "<ERROR> " << msg; \
          ELPP_INTERNAL_DEBUGGING_OUT_ERROR \
          << "ERROR FROM EASYLOGGING++ (LINE: " << __LINE__ << ") " \
          << ELPP_INTERNAL_DEBUGGING_MSG(internalInfoStream.str()) << ELPP_INTERNAL_DEBUGGING_ENDL; \
          if (pe) { ELPP_INTERNAL_DEBUGGING_OUT_ERROR << "    "; ELPP_INTERNAL_DEBUGGING_WRITE_PERROR; }} (void)0
#   endif
#else
#   undef ELPP_INTERNAL_INFO
#   define ELPP_INTERNAL_ERROR(msg, pe)
#endif  // defined(ELPP_DEBUG_ERRORS)
#if (defined(ELPP_DEBUG_INFO))
#   if !(defined(ELPP_INTERNAL_INFO_LEVEL))
#      define ELPP_INTERNAL_INFO_LEVEL 9
#   endif  // !(defined(ELPP_INTERNAL_INFO_LEVEL))
#   if !defined(ELPP_INTERNAL_INFO)
#      define ELPP_INTERNAL_INFO(lvl, msg) { if (lvl <= ELPP_INTERNAL_INFO_LEVEL) { \
          std::stringstream internalInfoStream; internalInfoStream << "<INFO> " << msg; \
          ELPP_INTERNAL_DEBUGGING_OUT_INFO << ELPP_INTERNAL_DEBUGGING_MSG(internalInfoStream.str()) \
             << ELPP_INTERNAL_DEBUGGING_ENDL; }}
#   endif
#else
#   undef ELPP_INTERNAL_INFO
#   define ELPP_INTERNAL_INFO(lvl, msg)
#endif  // (defined(ELPP_DEBUG_INFO))
#if defined(ELPP_STACKTRACE_ON_CRASH)
#   if (ELPP_COMPILER_GCC && !ELPP_MINGW)
#      define ELPP_STACKTRACE 1
#   else
#      if ELPP_COMPILER_MSVC
#         pragma message("Stack trace not available for this compiler")
#      else
#         warning "Stack trace not available for this compiler";
#      endif  // ELPP_COMPILER_MSVC
#   endif  // ELPP_COMPILER_GCC
#endif  // (defined(ELPP_STACKTRACE_ON_CRASH))
// Miscellaneous macros
#define ELPP_UNUSED(x) (void)x
#if ELPP_OS_UNIX
// Log file permissions for unix-based systems
#   define ELPP_LOG_PERMS S_IRUSR | S_IWUSR | S_IXUSR | S_IWGRP | S_IRGRP | S_IXGRP | S_IWOTH | S_IXOTH
#endif  // ELPP_OS_UNIX
#if defined(ELPP_AS_DLL) && ELPP_COMPILER_MSVC
#   if defined(ELPP_EXPORT_SYMBOLS)
#      define ELPP_EXPORT __declspec(dllexport)
#   else
#      define ELPP_EXPORT __declspec(dllimport)
#   endif  // defined(ELPP_EXPORT_SYMBOLS)
#else
#   define ELPP_EXPORT
#endif  // defined(ELPP_AS_DLL) && ELPP_COMPILER_MSVC
// Some special functions that are VC++ specific
#undef STRTOK
#undef STRERROR
#undef STRCAT
#undef STRCPY
#if ELPP_CRT_DBG_WARNINGS
#   define STRTOK(a, b, c) strtok_s(a, b, c)
#   define STRERROR(a, b, c) strerror_s(a, b, c)
#   define STRCAT(a, b, len) strcat_s(a, len, b)
#   define STRCPY(a, b, len) strcpy_s(a, len, b)
#else
#   define STRTOK(a, b, c) strtok(a, b)
#   define STRERROR(a, b, c) strerror(c)
#   define STRCAT(a, b, len) strcat(a, b)
#   define STRCPY(a, b, len) strcpy(a, b)
#endif
// Compiler specific support evaluations
#if (!ELPP_MINGW && !ELPP_COMPILER_CLANG) || defined(ELPP_FORCE_USE_STD_THREAD)
#   define ELPP_USE_STD_THREADING 1
#endif  // (!ELPP_MINGW && !ELPP_COMPILER_CLANG) || defined(ELPP_FORCE_USE_STD_THREAD)
#undef ELPP_FINAL
#if ELPP_COMPILER_INTEL || (ELPP_GCC_VERSION < 40702)
#   define ELPP_FINAL
#else
#   define ELPP_FINAL final
#endif  // ELPP_COMPILER_INTEL || (ELPP_GCC_VERSION < 40702)
#if defined(ELPP_EXPERIMENTAL_ASYNC)
#   define ELPP_ASYNC_LOGGING 1
#else
#   define ELPP_ASYNC_LOGGING 0
#endif  // defined(ELPP_EXPERIMENTAL_ASYNC)
#if defined(ELPP_THREAD_SAFE) || ELPP_ASYNC_LOGGING
#   define ELPP_THREADING_ENABLED 1
#endif  // defined(ELPP_THREAD_SAFE) || ELPP_ASYNC_LOGGING
// Function macro ELPP_FUNC
#undef ELPP_FUNC
#if ELPP_COMPILER_MSVC  // Visual C++
#   define ELPP_FUNC __FUNCSIG__
#elif ELPP_COMPILER_GCC  // GCC
#   define ELPP_FUNC __PRETTY_FUNCTION__
#elif ELPP_COMPILER_INTEL  // Intel C++
#   define ELPP_FUNC __PRETTY_FUNCTION__
#elif ELPP_COMPILER_CLANG  // Clang++
#   define ELPP_FUNC __PRETTY_FUNCTION__
#else
#   if defined(__func__)
#      define ELPP_FUNC __func__
#   else
#      define ELPP_FUNC ""
#   endif  // defined(__func__)
#endif  // defined(_MSC_VER)
#undef ELPP_VARIADIC_TEMPLATES_SUPPORTED
// Keep following line commented until features are fixed
#if ELPP_COMPILER_GCC || ELPP_COMPILER_CLANG || ELPP_COMPILER_INTEL || (ELPP_COMPILER_MSVC && _MSC_VER >= 1800)
#   define ELPP_VARIADIC_TEMPLATES_SUPPORTED 1
#endif  // ELPP_COMPILER_GCC || ELPP_COMPILER_CLANG || ELPP_COMPILER_INTEL || (ELPP_COMPILER_MSVC && _MSC_VER >= 1800)
// Logging Enable/Disable macros
#if (!defined(ELPP_DISABLE_LOGS))
#   define ELPP_LOGGING_ENABLED 1
#endif  // (!defined(ELPP_DISABLE_LOGS))
#if (!defined(ELPP_DISABLE_DEBUG_LOGS) && (ELPP_LOGGING_ENABLED) && ((defined(_DEBUG)) || (!defined(NDEBUG))))
#   define ELPP_DEBUG_LOG 1
#else
#   define ELPP_DEBUG_LOG 0
#endif  // (!defined(ELPP_DISABLE_DEBUG_LOGS) && (ELPP_LOGGING_ENABLED) && ((defined(_DEBUG)) || (!defined(NDEBUG))))
#if (!defined(ELPP_DISABLE_INFO_LOGS) && (ELPP_LOGGING_ENABLED))
#   define ELPP_INFO_LOG 1
#else
#   define ELPP_INFO_LOG 0
#endif  // (!defined(ELPP_DISABLE_INFO_LOGS) && (ELPP_LOGGING_ENABLED))
#if (!defined(ELPP_DISABLE_WARNING_LOGS) && (ELPP_LOGGING_ENABLED))
#   define ELPP_WARNING_LOG 1
#else
#   define ELPP_WARNING_LOG 0
#endif  // (!defined(ELPP_DISABLE_WARNING_LOGS) && (ELPP_LOGGING_ENABLED))
#if (!defined(ELPP_DISABLE_ERROR_LOGS) && (ELPP_LOGGING_ENABLED))
#   define ELPP_ERROR_LOG 1
#else
#   define ELPP_ERROR_LOG 0
#endif  // (!defined(ELPP_DISABLE_ERROR_LOGS) && (ELPP_LOGGING_ENABLED))
#if (!defined(ELPP_DISABLE_FATAL_LOGS) && (ELPP_LOGGING_ENABLED))
#   define ELPP_FATAL_LOG 1
#else
#   define ELPP_FATAL_LOG 0
#endif  // (!defined(ELPP_DISABLE_FATAL_LOGS) && (ELPP_LOGGING_ENABLED))
#if (!defined(ELPP_DISABLE_TRACE_LOGS) && (ELPP_LOGGING_ENABLED))
#   define ELPP_TRACE_LOG 1
#else
#   define ELPP_TRACE_LOG 0
#endif  // (!defined(ELPP_DISABLE_TRACE_LOGS) && (ELPP_LOGGING_ENABLED))
#if (!defined(ELPP_DISABLE_VERBOSE_LOGS) && (ELPP_LOGGING_ENABLED))
#   define ELPP_VERBOSE_LOG 1
#else
#   define ELPP_VERBOSE_LOG 0
#endif  // (!defined(ELPP_DISABLE_VERBOSE_LOGS) && (ELPP_LOGGING_ENABLED))
#if (!(ELPP_CXX0X || ELPP_CXX11))
#   error "Easylogging++ 9.0+ is only compatible with C++0x (or higher) compliant compiler"
#endif  // (!(ELPP_CXX0X || ELPP_CXX11))
// Headers
#if defined(ELPP_SYSLOG)
#   include <syslog.h>
#endif  // defined(ELPP_SYSLOG)
#include <ctime>
#include <cstring>
#include <cstdlib>
#include <cctype>
#include <cwchar>
#include <csignal>
#include <cerrno>
#include <cstdarg>
#if defined(ELPP_UNICODE)
#   include <locale>
#   if ELPP_OS_WINDOWS
#      include <codecvt>
#   endif // ELPP_OS_WINDOWS
#endif  // defined(ELPP_UNICODE)
#if ELPP_STACKTRACE
#   include <cxxabi.h>
#   include <execinfo.h>
#endif  // ELPP_STACKTRACE
#if ELPP_OS_ANDROID
#   include <sys/system_properties.h>
#endif  // ELPP_OS_ANDROID
#if ELPP_OS_UNIX
#   include <sys/stat.h>
#   include <sys/time.h>
#elif ELPP_OS_WINDOWS
#   include <direct.h>
#   include <windows.h>
#   if defined(WIN32_LEAN_AND_MEAN)
#      if defined(ELPP_WINSOCK2)
#         include <winsock2.h>
#	   else
#         include <winsock.h>
#      endif // defined(ELPP_WINSOCK2)
#   endif // defined(WIN32_LEAN_AND_MEAN)
#endif  // ELPP_OS_UNIX
#include <string>
#include <vector>
#include <map>
#include <utility>
#include <functional>
#include <algorithm>
#include <fstream>
#include <iostream>
#include <sstream>
#include <memory>
#include <type_traits>
#if ELPP_THREADING_ENABLED
#   if ELPP_USE_STD_THREADING
#      include <mutex>
#      include <thread>
#   else
#      if ELPP_OS_UNIX
#         include <pthread.h>
#      endif  // ELPP_OS_UNIX
#   endif  // ELPP_USE_STD_THREADING
#endif  // ELPP_THREADING_ENABLED
#if ELPP_ASYNC_LOGGING
#   include <thread>
#   include <queue>
#   include <condition_variable>
#endif  // ELPP_ASYNC_LOGGING
#if defined(ELPP_STL_LOGGING)
// For logging STL based templates
#   include <list>
#   include <queue>
#   include <deque>
#   include <set>
#   include <bitset>
#   include <stack>
#   if defined(ELPP_LOG_STD_ARRAY)
#      include <array>
#   endif  // defined(ELPP_LOG_STD_ARRAY)
#   if defined(ELPP_LOG_UNORDERED_MAP)
#      include <unordered_map>
#   endif  // defined(ELPP_LOG_UNORDERED_MAP)
#   if defined(ELPP_LOG_UNORDERED_SET)
#      include <unordered_set>
#   endif  // defined(ELPP_UNORDERED_SET)
#endif  // defined(ELPP_STL_LOGGING)
#if defined(ELPP_QT_LOGGING)
// For logging Qt based classes & templates
#   include <QString>
#   include <QByteArray>
#   include <QVector>
#   include <QList>
#   include <QPair>
#   include <QMap>
#   include <QQueue>
#   include <QSet>
#   include <QLinkedList>
#   include <QHash>
#   include <QMultiHash>
#   include <QStack>
#endif  // defined(ELPP_QT_LOGGING)
#if defined(ELPP_BOOST_LOGGING)
// For logging boost based classes & templates
#   include <boost/container/vector.hpp>
#   include <boost/container/stable_vector.hpp>
#   include <boost/container/list.hpp>
#   include <boost/container/deque.hpp>
#   include <boost/container/map.hpp>
#   include <boost/container/flat_map.hpp>
#   include <boost/container/set.hpp>
#   include <boost/container/flat_set.hpp>
#endif  // defined(ELPP_BOOST_LOGGING)
#if defined(ELPP_WXWIDGETS_LOGGING)
// For logging wxWidgets based classes & templates
#   include <wx/vector.h>
#endif  // defined(ELPP_WXWIDGETS_LOGGING)
// Forward declarations
namespace el {
	class Logger;
	class LogMessage;
	class PerformanceTrackingData;
	class Loggers;
	class Helpers;
	template <typename T> class Callback;
	class LogDispatchCallback;
	class PerformanceTrackingCallback;
	class LogDispatchData;
	namespace base {
		class Storage;
		class RegisteredLoggers;
		class PerformanceTracker;
		class MessageBuilder;
		class Writer;
		class PErrorWriter;
		class LogDispatcher;
		class DefaultLogBuilder;
		class DefaultLogDispatchCallback;
#if ELPP_ASYNC_LOGGING
		class AsyncLogDispatchCallback;
		class AsyncDispatchWorker;
#endif // ELPP_ASYNC_LOGGING
		class DefaultPerformanceTrackingCallback;
	}  // namespace base
}  // namespace el
/// @brief Easylogging++ entry namespace
namespace el {
	/// @brief Namespace containing base/internal functionality used by Easylogging++
	namespace base {
		/// @brief Data types used by Easylogging++
		namespace type {
#undef ELPP_LITERAL
#undef ELPP_STRLEN
#undef ELPP_COUT
#if defined(ELPP_UNICODE)
#   define ELPP_LITERAL(txt) L##txt
#   define ELPP_STRLEN wcslen
#   if defined ELPP_CUSTOM_COUT
#      define ELPP_COUT ELPP_CUSTOM_COUT
#   else
#      define ELPP_COUT std::wcout
#   endif  // defined ELPP_CUSTOM_COUT
			typedef wchar_t char_t;
			typedef std::wstring string_t;
			typedef std::wstringstream stringstream_t;
			typedef std::wfstream fstream_t;
			typedef std::wostream ostream_t;
#else
#   define ELPP_LITERAL(txt) txt
#   define ELPP_STRLEN strlen
#   if defined ELPP_CUSTOM_COUT
#      define ELPP_COUT ELPP_CUSTOM_COUT
#   else
#      define ELPP_COUT std::cout
#   endif  // defined ELPP_CUSTOM_COUT
			typedef char char_t;
			typedef std::string string_t;
			typedef std::stringstream stringstream_t;
			typedef std::fstream fstream_t;
			typedef std::ostream ostream_t;
#endif  // defined(ELPP_UNICODE)
#if defined(ELPP_CUSTOM_COUT_LINE)
#   define ELPP_COUT_LINE(logLine) ELPP_CUSTOM_COUT_LINE(logLine)
#else
#   define ELPP_COUT_LINE(logLine) logLine << std::flush
#endif // defined(ELPP_CUSTOM_COUT_LINE)
			typedef unsigned short EnumType;
			typedef std::shared_ptr<base::Storage> StoragePointer;
			typedef int VerboseLevel;
			typedef std::shared_ptr<LogDispatchCallback> LogDispatchCallbackPtr;
			typedef std::shared_ptr<PerformanceTrackingCallback> PerformanceTrackingCallbackPtr;
		}  // namespace type
		/// @brief Internal helper class that prevent copy constructor for class
		///
		/// @detail When using this class simply inherit it privately
		class NoCopy
		{
		protected:
			NoCopy(void)
			{
			}
		private:
			NoCopy(const NoCopy&);
			NoCopy& operator=(const NoCopy&);
		};
		/// @brief Internal helper class that makes all default constructors private.
		///
		/// @detail This prevents initializing class making it static unless an explicit constructor is declared.
		/// When using this class simply inherit it privately
		class StaticClass
		{
		private:
			StaticClass(void);
			StaticClass(const StaticClass&);
			StaticClass& operator=(const StaticClass&);
		};
	}  // namespace base
	/// @brief Represents enumeration for severity level used to determine level of logging
	///
	/// @detail With Easylogging++, developers may disable or enable any level regardless of
	/// what the severity is. Or they can choose to log using hierarchical logging flag
	enum class Level : base::type::EnumType
	{
		/// @brief Generic level that represents all the levels. Useful when setting global configuration for all levels
		Global = 1,
		/// @brief Information that can be useful to back-trace certain events - mostly useful than debug logs.
		Trace = 2,
		/// @brief Informational events most useful for developers to debug application
		Debug = 4,
		/// @brief Severe error information that will presumably abort application
		Fatal = 8,
		/// @brief Information representing errors in application but application will keep running
		Error = 16,
		/// @brief Useful when application has potentially harmful situtaions
		Warning = 32,
		/// @brief Information that can be highly useful and vary with verbose logging level.
		Verbose = 64,
		/// @brief Mainly useful to represent current progress of application
		Info = 128,
		/// @brief Represents unknown level
		Unknown = 1010
	};
	/// @brief Static class that contains helper functions for el::Level
	class LevelHelper : base::StaticClass
	{
	public:
		/// @brief Represents minimum valid level. Useful when iterating through enum.
		static const base::type::EnumType kMinValid = static_cast<base::type::EnumType>(Level::Trace);
		/// @brief Represents maximum valid level. This is used internally and you should not need it.
		static const base::type::EnumType kMaxValid = static_cast<base::type::EnumType>(Level::Info);
		/// @brief Casts level to int, useful for iterating through enum.
		static base::type::EnumType castToInt(Level level)
		{
			return static_cast<base::type::EnumType>(level);
		}
		/// @brief Casts int(ushort) to level, useful for iterating through enum.
		static Level castFromInt(base::type::EnumType l)
		{
			return static_cast<Level>(l);
		}
		/// @brief Converts level to associated const char*
		/// @return Upper case string based level.
		static const char* convertToString(Level level)
		{
			// Do not use switch over strongly typed enums because Intel C++ compilers dont support them yet.
			if(level == Level::Global) return "GLOBAL";
			if(level == Level::Debug) return "DEBUG";
			if(level == Level::Info) return "INFO";
			if(level == Level::Warning) return "WARNING";
			if(level == Level::Error) return "ERROR";
			if(level == Level::Fatal) return "FATAL";
			if(level == Level::Verbose) return "VERBOSE";
			if(level == Level::Trace) return "TRACE";
			return "UNKNOWN";
		}
		/// @brief Converts from levelStr to Level
		/// @param levelStr Upper case string based level.
		///        Lower case is also valid but providing upper case is recommended.
		static Level convertFromString(const char* levelStr)
		{
			if((strcmp(levelStr, "GLOBAL") == 0) || (strcmp(levelStr, "global") == 0))
				return Level::Global;
			if((strcmp(levelStr, "DEBUG") == 0) || (strcmp(levelStr, "debug") == 0))
				return Level::Debug;
			if((strcmp(levelStr, "INFO") == 0) || (strcmp(levelStr, "info") == 0))
				return Level::Info;
			if((strcmp(levelStr, "WARNING") == 0) || (strcmp(levelStr, "warning") == 0))
				return Level::Warning;
			if((strcmp(levelStr, "ERROR") == 0) || (strcmp(levelStr, "error") == 0))
				return Level::Error;
			if((strcmp(levelStr, "FATAL") == 0) || (strcmp(levelStr, "fatal") == 0))
				return Level::Fatal;
			if((strcmp(levelStr, "VERBOSE") == 0) || (strcmp(levelStr, "verbose") == 0))
				return Level::Verbose;
			if((strcmp(levelStr, "TRACE") == 0) || (strcmp(levelStr, "trace") == 0))
				return Level::Trace;
			return Level::Unknown;
		}
		/// @brief Applies specified function to each level starting from startIndex
		/// @param startIndex initial value to start the iteration from. This is passed as pointer and
		///        is left-shifted so this can be used inside function (fn) to represent current level.
		/// @param fn function to apply with each level. This bool represent whether or not to stop iterating through levels.
		static inline void forEachLevel(base::type::EnumType* startIndex, const std::function<bool(void)>& fn)
		{
			base::type::EnumType lIndexMax = LevelHelper::kMaxValid;
			do
			{
				if(fn())
				{
					break;
				}
				*startIndex = static_cast<base::type::EnumType>(*startIndex << 1);
			} while(*startIndex <= lIndexMax);
		}
	};
	/// @brief Represents enumeration of ConfigurationType used to configure or access certain aspect
	/// of logging
	enum class ConfigurationType : base::type::EnumType
	{
		/// @brief Determines whether or not corresponding level and logger of logging is enabled
		/// You may disable all logs by using el::Level::Global
		Enabled = 1,
		/// @brief Whether or not to write corresponding log to log file
		ToFile = 2,
		/// @brief Whether or not to write corresponding level and logger log to standard output.
		/// By standard output meaning termnal, command prompt etc
		ToStandardOutput = 4,
		/// @brief Determines format of logging corresponding level and logger.
		Format = 8,
		/// @brief Determines log file (full path) to write logs to for correponding level and logger
		Filename = 16,
		/// @brief Specifies milliseconds width. Width can be within range (1-6)
		MillisecondsWidth = 32,
		/// @brief Determines whether or not performance tracking is enabled.
		///
		/// @detail This does not depend on logger or level. Performance tracking always uses 'performance' logger
		PerformanceTracking = 64,
		/// @brief Specifies log file max size.
		///
		/// @detail If file size of corresponding log file (for corresponding level) is >= specified size, log file will
		/// be truncated and re-initiated.
		MaxLogFileSize = 128,
		/// @brief Specifies number of log entries to hold until we flush pending log data
		LogFlushThreshold = 256,
		/// @brief Represents unknown configuration
		Unknown = 1010
	};
	/// @brief Static class that contains helper functions for el::ConfigurationType
	class ConfigurationTypeHelper : base::StaticClass
	{
	public:
		/// @brief Represents minimum valid configuration type. Useful when iterating through enum.
		static const base::type::EnumType kMinValid = static_cast<base::type::EnumType>(ConfigurationType::Enabled);
		/// @brief Represents maximum valid configuration type. This is used internally and you should not need it.
		static const base::type::EnumType kMaxValid = static_cast<base::type::EnumType>(ConfigurationType::MaxLogFileSize);
		/// @brief Casts configuration type to int, useful for iterating through enum.
		static base::type::EnumType castToInt(ConfigurationType configurationType)
		{
			return static_cast<base::type::EnumType>(configurationType);
		}
		/// @brief Casts int(ushort) to configurationt type, useful for iterating through enum.
		static ConfigurationType castFromInt(base::type::EnumType c)
		{
			return static_cast<ConfigurationType>(c);
		}
		/// @brief Converts configuration type to associated const char*
		/// @returns Upper case string based configuration type.
		static const char* convertToString(ConfigurationType configurationType)
		{
			// Do not use switch over strongly typed enums because Intel C++ compilers dont support them yet.
			if(configurationType == ConfigurationType::Enabled) return "ENABLED";
			if(configurationType == ConfigurationType::Filename) return "FILENAME";
			if(configurationType == ConfigurationType::Format) return "FORMAT";
			if(configurationType == ConfigurationType::ToFile) return "TO_FILE";
			if(configurationType == ConfigurationType::ToStandardOutput) return "TO_STANDARD_OUTPUT";
			if(configurationType == ConfigurationType::MillisecondsWidth) return "MILLISECONDS_WIDTH";
			if(configurationType == ConfigurationType::PerformanceTracking) return "PERFORMANCE_TRACKING";
			if(configurationType == ConfigurationType::MaxLogFileSize) return "MAX_LOG_FILE_SIZE";
			if(configurationType == ConfigurationType::LogFlushThreshold) return "LOG_FLUSH_THRESHOLD";
			return "UNKNOWN";
		}
		/// @brief Converts from configStr to ConfigurationType
		/// @param configStr Upper case string based configuration type.
		///        Lower case is also valid but providing upper case is recommended.
		static ConfigurationType convertFromString(const char* configStr)
		{
			if((strcmp(configStr, "ENABLED") == 0) || (strcmp(configStr, "enabled") == 0))
				return ConfigurationType::Enabled;
			if((strcmp(configStr, "TO_FILE") == 0) || (strcmp(configStr, "to_file") == 0))
				return ConfigurationType::ToFile;
			if((strcmp(configStr, "TO_STANDARD_OUTPUT") == 0) || (strcmp(configStr, "to_standard_output") == 0))
				return ConfigurationType::ToStandardOutput;
			if((strcmp(configStr, "FORMAT") == 0) || (strcmp(configStr, "format") == 0))
				return ConfigurationType::Format;
			if((strcmp(configStr, "FILENAME") == 0) || (strcmp(configStr, "filename") == 0))
				return ConfigurationType::Filename;
			if((strcmp(configStr, "MILLISECONDS_WIDTH") == 0) || (strcmp(configStr, "milliseconds_width") == 0))
				return ConfigurationType::MillisecondsWidth;
			if((strcmp(configStr, "PERFORMANCE_TRACKING") == 0) || (strcmp(configStr, "performance_tracking") == 0))
				return ConfigurationType::PerformanceTracking;
			if((strcmp(configStr, "MAX_LOG_FILE_SIZE") == 0) || (strcmp(configStr, "max_log_file_size") == 0))
				return ConfigurationType::MaxLogFileSize;
			if((strcmp(configStr, "LOG_FLUSH_THRESHOLD") == 0) || (strcmp(configStr, "log_flush_threshold") == 0))
				return ConfigurationType::LogFlushThreshold;
			return ConfigurationType::Unknown;
		}
		/// @brief Applies specified function to each configuration type starting from startIndex
		/// @param startIndex initial value to start the iteration from. This is passed by pointer and is left-shifted
		///        so this can be used inside function (fn) to represent current configuration type.
		/// @param fn function to apply with each configuration type.
		///        This bool represent whether or not to stop iterating through configurations.
		static inline void forEachConfigType(base::type::EnumType* startIndex, const std::function<bool(void)>& fn)
		{
			base::type::EnumType cIndexMax = ConfigurationTypeHelper::kMaxValid;
			do
			{
				if(fn())
				{
					break;
				}
				*startIndex = static_cast<base::type::EnumType>(*startIndex << 1);
			} while(*startIndex <= cIndexMax);
		}
	};
	/// @brief Flags used while writing logs. This flags are set by user
	enum class LoggingFlag : base::type::EnumType
	{
		/// @brief Makes sure we have new line for each container log entry
		NewLineForContainer = 1,
		/// @brief Makes sure if -vmodule is used and does not specifies a module, then verbose
		/// logging is allowed via that module.
		AllowVerboseIfModuleNotSpecified = 2,
		/// @brief When handling crashes by default, detailed crash reason will be logged as well
		LogDetailedCrashReason = 4,
		/// @brief Allows to disable application abortion when logged using FATAL level
		DisableApplicationAbortOnFatalLog = 8,
		/// @brief Flushes log with every log-entry (performance sensative) - Disabled by default
		ImmediateFlush = 16,
		/// @brief Enables strict file rolling
		StrictLogFileSizeCheck = 32,
		/// @brief Make terminal output colorful for supported terminals
		ColoredTerminalOutput = 64,
		/// @brief Supports use of multiple logging in same macro, e.g, CLOG(INFO, "default", "network")
		MultiLoggerSupport = 128,
		/// @brief Disables comparing performance tracker's checkpoints
		DisablePerformanceTrackingCheckpointComparison = 256,
		/// @brief Disable VModules
		DisableVModules = 512,
		/// @brief Disable VModules extensions
		DisableVModulesExtensions = 1024,
		/// @brief Enables hierarchical logging
		HierarchicalLogging = 2048,
		/// @brief Creates logger automatically when not available
		CreateLoggerAutomatically = 4096,
		/// @brief Adds spaces b/w logs that separated by left-shift operator
		AutoSpacing = 8192,
		/// @brief Preserves time format and does not convert it to sec, hour etc (performance tracking only)
		FixedTimeFormat = 16384
	};
	namespace base {
		/// @brief Namespace containing constants used internally.
		namespace consts {
			// Level log values - These are values that are replaced in place of %level format specifier
			static const base::type::char_t* kInfoLevelLogValue = ELPP_LITERAL("INFO ");
			static const base::type::char_t* kDebugLevelLogValue = ELPP_LITERAL("DEBUG");
			static const base::type::char_t* kWarningLevelLogValue = ELPP_LITERAL("WARN ");
			static const base::type::char_t* kErrorLevelLogValue = ELPP_LITERAL("ERROR");
			static const base::type::char_t* kFatalLevelLogValue = ELPP_LITERAL("FATAL");
			static const base::type::char_t* kVerboseLevelLogValue = ELPP_LITERAL("VER");
			static const base::type::char_t* kTraceLevelLogValue = ELPP_LITERAL("TRACE");
			static const base::type::char_t* kInfoLevelShortLogValue = ELPP_LITERAL("I");
			static const base::type::char_t* kDebugLevelShortLogValue = ELPP_LITERAL("D");
			static const base::type::char_t* kWarningLevelShortLogValue = ELPP_LITERAL("W");
			static const base::type::char_t* kErrorLevelShortLogValue = ELPP_LITERAL("E");
			static const base::type::char_t* kFatalLevelShortLogValue = ELPP_LITERAL("F");
			static const base::type::char_t* kVerboseLevelShortLogValue = ELPP_LITERAL("V");
			static const base::type::char_t* kTraceLevelShortLogValue = ELPP_LITERAL("T");
			// Format specifiers - These are used to define log format
			static const base::type::char_t* kAppNameFormatSpecifier = ELPP_LITERAL("%app");
			static const base::type::char_t* kLoggerIdFormatSpecifier = ELPP_LITERAL("%logger");
			static const base::type::char_t* kThreadIdFormatSpecifier = ELPP_LITERAL("%thread");
			static const base::type::char_t* kSeverityLevelFormatSpecifier = ELPP_LITERAL("%level");
			static const base::type::char_t* kSeverityLevelShortFormatSpecifier = ELPP_LITERAL("%levshort");
			static const base::type::char_t* kDateTimeFormatSpecifier = ELPP_LITERAL("%datetime");
			static const base::type::char_t* kLogFileFormatSpecifier = ELPP_LITERAL("%file");
			static const base::type::char_t* kLogFileBaseFormatSpecifier = ELPP_LITERAL("%fbase");
			static const base::type::char_t* kLogLineFormatSpecifier = ELPP_LITERAL("%line");
			static const base::type::char_t* kLogLocationFormatSpecifier = ELPP_LITERAL("%loc");
			static const base::type::char_t* kLogFunctionFormatSpecifier = ELPP_LITERAL("%func");
			static const base::type::char_t* kCurrentUserFormatSpecifier = ELPP_LITERAL("%user");
			static const base::type::char_t* kCurrentHostFormatSpecifier = ELPP_LITERAL("%host");
			static const base::type::char_t* kMessageFormatSpecifier = ELPP_LITERAL("%msg");
			static const base::type::char_t* kVerboseLevelFormatSpecifier = ELPP_LITERAL("%vlevel");
			static const char* kDateTimeFormatSpecifierForFilename = "%datetime";
			// Date/time
			static const char* kDays[7] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};
			static const char* kDaysAbbrev[7] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
			static const char* kMonths[12] = {"January", "February", "March", "Apri", "May", "June", "July", "August",
				"September", "October", "November", "December"};
			static const char* kMonthsAbbrev[12] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
			static const char* kDefaultDateTimeFormat = "%Y-%M-%d %H:%m:%s,%g";
			static const char* kDefaultDateTimeFormatInFilename = "%Y-%M-%d_%H-%m";
			static const int kYearBase = 1900;
			static const char* kAm = "AM";
			static const char* kPm = "PM";
			// Miscellaneous constants
			static const char* kDefaultLoggerId = "default";
			static const char* kPerformanceLoggerId = "performance";
			static const char* kSysLogLoggerId = "syslog";
			static const char* kNullPointer = "nullptr";
			static const char  kFormatSpecifierChar = '%';
#if ELPP_VARIADIC_TEMPLATES_SUPPORTED
			static const char  kFormatSpecifierCharValue = 'v';
#endif  // ELPP_VARIADIC_TEMPLATES_SUPPORTED
			static const unsigned int kMaxLogPerContainer = 100;
			static const unsigned int kMaxLogPerCounter = 100000;
			static const unsigned int  kDefaultMillisecondsWidth = 3;
			static const base::type::VerboseLevel kMaxVerboseLevel = 9;
			static const char* kUnknownUser = "user";
			static const char* kUnknownHost = "unknown-host";
#if defined(ELPP_DEFAULT_LOG_FILE)
			static const char* kDefaultLogFile = ELPP_DEFAULT_LOG_FILE;
#else
#   if ELPP_OS_UNIX
#      if ELPP_OS_ANDROID
			static const char* kDefaultLogFile = "logs/myeasylog.log";
#      else
			static const char* kDefaultLogFile = "logs/myeasylog.log";
#      endif  // ELPP_OS_ANDROID
#   elif ELPP_OS_WINDOWS
			static const char* kDefaultLogFile = "logs/myeasylog.log";
#   endif  // ELPP_OS_UNIX
#endif  // defined(ELPP_DEFAULT_LOG_FILE)
#if !defined(ELPP_DISABLE_LOG_FILE_FROM_ARG)
			static const char* kDefaultLogFileParam = "--default-log-file";
#endif  // !defined(ELPP_DISABLE_LOG_FILE_FROM_ARG)
#if defined(ELPP_LOGGING_FLAGS_FROM_ARG)
			static const char* kLoggingFlagsParam = "--logging-flags";
#endif  // defined(ELPP_LOGGING_FLAGS_FROM_ARG)
#if ELPP_OS_WINDOWS
			static const char* kFilePathSeperator = "\\";
#else
			static const char* kFilePathSeperator = "/";
#endif  // ELPP_OS_WINDOWS
			static const char* kValidLoggerIdSymbols = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-._";
			static const char* kConfigurationComment = "##";
			static const char* kConfigurationLevel = "*";
			static const char* kConfigurationLoggerId = "--";
			static const std::size_t kSourceFilenameMaxLength = 100;
			static const std::size_t kSourceLineMaxLength = 10;
			static const Level kPerformanceTrackerDefaultLevel = Level::Info;
			const struct
			{
				double value;
				const base::type::char_t* unit;
			} kTimeFormats[] = {
				{1000.0f, ELPP_LITERAL("mis")},
			   {1000.0f, ELPP_LITERAL("ms")},
			   {60.0f, ELPP_LITERAL("seconds")},
			   {60.0f, ELPP_LITERAL("minutes")},
			   {24.0f, ELPP_LITERAL("hours")},
			   {7.0f, ELPP_LITERAL("days")}
			};
			static const int kTimeFormatsCount = sizeof(kTimeFormats) / sizeof(kTimeFormats[0]);
			const struct
			{
				int numb;
				const char* name;
				const char* brief;
				const char* detail;
			} kCrashSignals[] = {
				// NOTE: Do not re-order, if you do please check CrashHandler(bool) constructor and CrashHandler::setHandler(..)
				{SIGABRT, "SIGABRT", "Abnormal termination",
				"Program was abnormally terminated."},
				{SIGFPE, "SIGFPE", "Erroneous arithmetic operation",
				"Arithemetic operation issue such as division by zero or operation resulting in overflow."},
				{SIGILL, "SIGILL", "Illegal instruction",
				"Generally due to a corruption in the code or to an attempt to execute data."},
				{SIGSEGV, "SIGSEGV", "Invalid access to memory",
				"Program is trying to read an invalid (unallocated, deleted or corrupted) or inaccessible memory."},
				//        { SIGINT, "SIGINT", "Interactive attention signal",
				//                 "Interruption generated (generally) by user or operating system." },
			};
			static const int kCrashSignalsCount = sizeof(kCrashSignals) / sizeof(kCrashSignals[0]);
		}  // namespace consts
	}  // namespace base
	typedef std::function<void(const char*, std::size_t)> PreRollOutCallback;
	namespace base {
		static inline void defaultPreRollOutCallback(const char*, std::size_t)
		{
		}
		/// @brief Enum to represent timestamp unit
		enum class TimestampUnit : base::type::EnumType
		{
			Microsecond = 0, Millisecond = 1, Second = 2, Minute = 3, Hour = 4, Day = 5
		};
		/// @brief Format flags used to determine specifiers that are active for performance improvements.
		enum class FormatFlags : base::type::EnumType
		{
			DateTime = 1 << 1, LoggerId = 1 << 2, File = 1 << 3, Line = 1 << 4, Location = 1 << 5, Function = 1 << 6,
			User = 1 << 7, Host = 1 << 8, LogMessage = 1 << 9, VerboseLevel = 1 << 10, AppName = 1 << 11, ThreadId = 1 << 12,
			Level = 1 << 13, FileBase = 1 << 14, LevelShort = 1 << 15
		};
		/// @brief A milliseconds width class containing actual width and offset for date/time
		class MillisecondsWidth
		{
		public:
			MillisecondsWidth(void)
			{
				init(base::consts::kDefaultMillisecondsWidth);
			}
			explicit MillisecondsWidth(int width)
			{
				init(width);
			}
			bool operator==(const MillisecondsWidth& msWidth)
			{
				return m_width == msWidth.m_width && m_offset == msWidth.m_offset;
			}
			int m_width; unsigned int m_offset;
		private:
			void init(int width)
			{
				if(width < 1 || width > 6)
				{
					width = base::consts::kDefaultMillisecondsWidth;
				}
				m_width = width;
				switch(m_width)
				{
				case 3: m_offset = 1000; break;
				case 4: m_offset = 100; break;
				case 5: m_offset = 10; break;
				case 6: m_offset = 1; break;
				default: m_offset = 1000; break;
				}
			}
		};
		/// @brief Namespace containing utility functions/static classes used internally
		namespace utils {
			/// @brief Deletes memory safely and points to null
			template <typename T>
			static inline
				typename std::enable_if<std::is_pointer<T*>::value, void>::type
				safeDelete(T*& pointer)
			{
				if(pointer == nullptr)
					return;
				delete pointer;
				pointer = nullptr;
			}
			/// @brief Gets value of const char* but if it is nullptr, a string nullptr is returned
			static inline const char* charPtrVal(const char* pointer)
			{
				return pointer == nullptr ? base::consts::kNullPointer : pointer;
			}
			/// @brief Aborts application due with user-defined status
			static inline void abort(int status, const std::string& reason = std::string())
			{
				// Both status and reason params are there for debugging with tools like gdb etc
				ELPP_UNUSED(status);
				ELPP_UNUSED(reason);
#if defined(ELPP_COMPILER_MSVC) && defined(_M_IX86) && defined(_DEBUG)
				// Ignore msvc critical error dialog - break instead (on debug mode)
				_asm int 3
#else
				::abort();
#endif  // defined(ELPP_COMPILER_MSVC) && defined(_M_IX86) && defined(_DEBUG)
			}
			/// @brief Bitwise operations for C++11 strong enum class. This casts e into Flag_T and returns value after bitwise operation
			/// Use these function as <pre>flag = bitwise::Or<MyEnum>(MyEnum::val1, flag);</pre>
			namespace bitwise {
				template <typename Enum>
				static inline base::type::EnumType And(Enum e, base::type::EnumType flag)
				{
					return static_cast<base::type::EnumType>(flag) & static_cast<base::type::EnumType>(e);
				}
				template <typename Enum>
				static inline base::type::EnumType Not(Enum e, base::type::EnumType flag)
				{
					return static_cast<base::type::EnumType>(flag) & ~(static_cast<base::type::EnumType>(e));
				}
				template <typename Enum>
				static inline base::type::EnumType Or(Enum e, base::type::EnumType flag)
				{
					return static_cast<base::type::EnumType>(flag) | static_cast<base::type::EnumType>(e);
				}
			}  // namespace bitwise
			template <typename Enum>
			static inline void addFlag(Enum e, base::type::EnumType* flag)
			{
				*flag = base::utils::bitwise::Or<Enum>(e, *flag);
			}
			template <typename Enum>
			static inline void removeFlag(Enum e, base::type::EnumType* flag)
			{
				*flag = base::utils::bitwise::Not<Enum>(e, *flag);
			}
			template <typename Enum>
			static inline bool hasFlag(Enum e, base::type::EnumType flag)
			{
				return base::utils::bitwise::And<Enum>(e, flag) > 0x0;
			}
		}  // namespace utils
		namespace threading {
#if ELPP_THREADING_ENABLED
#   if !ELPP_USE_STD_THREADING
			namespace internal {
				/// @brief A mutex wrapper for compiler that dont yet support std::mutex
				class Mutex : base::NoCopy
				{
				public:
					Mutex(void)
					{
#   if ELPP_OS_UNIX
						pthread_mutex_init(&m_underlyingMutex, nullptr);
#   elif ELPP_OS_WINDOWS
						InitializeCriticalSection(&m_underlyingMutex);
#   endif  // ELPP_OS_UNIX
					}

					virtual ~Mutex(void)
					{
#   if ELPP_OS_UNIX
						pthread_mutex_destroy(&m_underlyingMutex);
#   elif ELPP_OS_WINDOWS
						DeleteCriticalSection(&m_underlyingMutex);
#   endif  // ELPP_OS_UNIX
					}

					inline void lock(void)
					{
#   if ELPP_OS_UNIX
						pthread_mutex_lock(&m_underlyingMutex);
#   elif ELPP_OS_WINDOWS
						EnterCriticalSection(&m_underlyingMutex);
#   endif  // ELPP_OS_UNIX
					}

					inline bool try_lock(void)
					{
#   if ELPP_OS_UNIX
						return (pthread_mutex_trylock(&m_underlyingMutex) == 0);
#   elif ELPP_OS_WINDOWS
						return TryEnterCriticalSection(&m_underlyingMutex);
#   endif  // ELPP_OS_UNIX
					}

					inline void unlock(void)
					{
#   if ELPP_OS_UNIX
						pthread_mutex_unlock(&m_underlyingMutex);
#   elif ELPP_OS_WINDOWS
						LeaveCriticalSection(&m_underlyingMutex);
#   endif  // ELPP_OS_UNIX
					}

				private:
#   if ELPP_OS_UNIX
					pthread_mutex_t m_underlyingMutex;
#   elif ELPP_OS_WINDOWS
					CRITICAL_SECTION m_underlyingMutex;
#   endif  // ELPP_OS_UNIX
				};
				/// @brief Scoped lock for compiler that dont yet support std::lock_guard
				template <typename M>
				class ScopedLock : base::NoCopy
				{
				public:
					explicit ScopedLock(M& mutex)
					{
						m_mutex = &mutex;
						m_mutex->lock();
					}

					virtual ~ScopedLock(void)
					{
						m_mutex->unlock();
					}
				private:
					M* m_mutex;
					ScopedLock(void);
				};
			} // namespace internal
			/// @brief Gets ID of currently running threading in windows systems. On unix, nothing is returned.
			static inline std::string getCurrentThreadId(void)
			{
				std::stringstream ss;
#      if (ELPP_OS_WINDOWS)
				ss << GetCurrentThreadId();
#      endif  // (ELPP_OS_WINDOWS)
				return ss.str();
			}
			static inline void msleep(int)
			{
				// No implementation for non std::thread version
			}
			typedef base::threading::internal::Mutex Mutex;
			typedef base::threading::internal::ScopedLock<base::threading::Mutex> ScopedLock;
#   else
			/// @brief Gets ID of currently running threading using std::this_thread::get_id()
			static inline std::string getCurrentThreadId(void)
			{
				std::stringstream ss;
				ss << std::this_thread::get_id();
				return ss.str();
			}
			static inline void msleep(int ms)
			{
				// Only when async logging enabled - this is because async is strict on compiler
#if ELPP_ASYNC_LOGGING
				std::this_thread::sleep_for(std::chrono::milliseconds(ms));
#endif  // ELPP_ASYNC_LOGGING
			}
			typedef std::mutex Mutex;
			typedef std::lock_guard<std::mutex> ScopedLock;
#   endif  // !ELPP_USE_STD_THREADING
#else
			namespace internal {
				/// @brief Mutex wrapper used when multi-threading is disabled.
				class NoMutex : base::NoCopy
				{
				public:
					NoMutex(void)
					{
					}
					inline void lock(void)
					{
					}
					inline bool try_lock(void)
					{
						return true;
					}
					inline void unlock(void)
					{
					}
				};
				/// @brief Lock guard wrapper used when multi-threading is disabled.
				template <typename Mutex>
				class NoScopedLock : base::NoCopy
				{
				public:
					explicit NoScopedLock(Mutex&)
					{
					}
					virtual ~NoScopedLock(void)
					{
					}
				private:
					NoScopedLock(void);
				};
			}  // namespace internal
			static inline std::string getCurrentThreadId(void)
			{
				return std::string();
			}
			static inline void msleep(int)
			{
				// No custom implementation
			}
			typedef base::threading::internal::NoMutex Mutex;
			typedef base::threading::internal::NoScopedLock<base::threading::Mutex> ScopedLock;
#endif  // ELPP_THREADING_ENABLED
			/// @brief Base of thread safe class, this class is inheritable-only
			class ThreadSafe
			{
			public:
				virtual inline void acquireLock(void) ELPP_FINAL
				{
					m_mutex.lock();
				}
				virtual inline void releaseLock(void) ELPP_FINAL
				{
					m_mutex.unlock();
				}
				virtual inline base::threading::Mutex& lock(void) ELPP_FINAL
				{
					return m_mutex;
				}
			protected:
				ThreadSafe(void)
				{
				}
				virtual ~ThreadSafe(void)
				{
				}
			private:
				base::threading::Mutex m_mutex;
			};
		}  // namespace threading
		namespace utils {
			class File : base::StaticClass
			{
			public:
				/// @brief Creates new out file stream for specified filename.
				/// @return Pointer to newly created fstream or nullptr
				static base::type::fstream_t* newFileStream(const std::string& filename)
				{
					base::type::fstream_t* fs = new base::type::fstream_t(filename.c_str(),
						base::type::fstream_t::out | base::type::fstream_t::app);
#if defined(ELPP_UNICODE)
					std::locale elppUnicodeLocale("");
#if ELPP_OS_WINDOWS
					std::locale elppUnicodeLocaleWindows(elppUnicodeLocale, new std::codecvt_utf8_utf16<wchar_t>);
					elppUnicodeLocale = elppUnicodeLocaleWindows;
#endif
					fs->imbue(elppUnicodeLocale);
#endif  // defined(ELPP_UNICODE)
					if(fs->is_open())
					{
						fs->flush();
					}
					else
					{
						base::utils::safeDelete(fs);
						ELPP_INTERNAL_ERROR("Bad file [" << filename << "]", true);
					}
					return fs;
				}

				/// @brief Gets size of file provided in stream
				static /*std::size_t*/int64_t getSizeOfFile(base::type::fstream_t* fs)
				{
					if(fs == nullptr)
					{
						return 0;
					}
					std::streampos currPos = fs->tellg();
					fs->seekg(0, fs->end);
					/*std::size_t*/int64_t size = static_cast</*std::size_t*/int64_t>(fs->tellg());
					fs->seekg(currPos);
					return size;
				}

				/// @brief Determines whether or not provided path exist in current file system
				static inline bool pathExists(const char* path, bool considerFile = false)
				{
					if(path == nullptr)
					{
						return false;
					}
#if ELPP_OS_UNIX
					ELPP_UNUSED(considerFile);
					struct stat st;
					return (stat(path, &st) == 0);
#elif ELPP_OS_WINDOWS
					DWORD fileType = GetFileAttributesA(path);
					if(fileType == INVALID_FILE_ATTRIBUTES)
					{
						return false;
					}
					return considerFile ? true : ((fileType & FILE_ATTRIBUTE_DIRECTORY) == 0 ? false : true);
#endif  // ELPP_OS_UNIX
				}

				/// @brief Creates specified path on file system
				/// @param path Path to create.
				static bool createPath(const std::string& path)
				{
					if(path.empty())
					{
						return false;
					}
					if(base::utils::File::pathExists(path.c_str()))
					{
						return true;
					}
					int status = -1;

					char* currPath = const_cast<char*>(path.c_str());
					std::string builtPath = std::string();
#if ELPP_OS_UNIX
					if(path[0] == '/')
					{
						builtPath = "/";
					}
					currPath = STRTOK(currPath, base::consts::kFilePathSeperator, 0);
#elif ELPP_OS_WINDOWS
					// Use secure functions API
					char* nextTok_ = nullptr;
					currPath = STRTOK(currPath, base::consts::kFilePathSeperator, &nextTok_);
					ELPP_UNUSED(nextTok_);
#endif  // ELPP_OS_UNIX
					while(currPath != nullptr)
					{
						builtPath.append(currPath);
						builtPath.append(base::consts::kFilePathSeperator);
#if ELPP_OS_UNIX
						status = mkdir(builtPath.c_str(), ELPP_LOG_PERMS);
						currPath = STRTOK(nullptr, base::consts::kFilePathSeperator, 0);
#elif ELPP_OS_WINDOWS
						status = _mkdir(builtPath.c_str());
						currPath = STRTOK(nullptr, base::consts::kFilePathSeperator, &nextTok_);
#endif  // ELPP_OS_UNIX
					}
					if(status == -1)
					{
						ELPP_INTERNAL_ERROR("Error while creating path [" << path << "]", true);
						return false;
					}
					return true;
				}
				/// @brief Extracts path of filename with leading slash
				static std::string extractPathFromFilename(const std::string& fullPath,
						const char* seperator = base::consts::kFilePathSeperator)
				{
					if((fullPath == "") || (fullPath.find(seperator) == std::string::npos))
					{
						return fullPath;
					}
					std::size_t lastSlashAt = fullPath.find_last_of(seperator);
					if(lastSlashAt == 0)
					{
						return std::string(seperator);
					}
					return fullPath.substr(0, lastSlashAt + 1);
				}
				/// @brief builds stripped filename and puts it in buff
				static void buildStrippedFilename(const char* filename, char buff[],
						std::size_t limit = base::consts::kSourceFilenameMaxLength)
				{
					std::size_t sizeOfFilename = strlen(filename);
					if(sizeOfFilename >= limit)
					{
						filename += (sizeOfFilename - limit);
						if(filename[0] != '.' && filename[1] != '.')
						{  // prepend if not already
							filename += 3;  // 3 = '..'
							STRCAT(buff, "..", limit);
						}
					}
					STRCAT(buff, filename, limit);
				}
				/// @brief builds base filename and puts it in buff
				static void buildBaseFilename(const std::string& fullPath, char buff[],
						std::size_t limit = base::consts::kSourceFilenameMaxLength,
						const char* seperator = base::consts::kFilePathSeperator)
				{
					const char* filename = fullPath.c_str();
					std::size_t lastSlashAt = fullPath.find_last_of(seperator);
					filename += lastSlashAt ? lastSlashAt + 1 : 0;
					std::size_t sizeOfFilename = strlen(filename);
					if(sizeOfFilename >= limit)
					{
						filename += (sizeOfFilename - limit);
						if(filename[0] != '.' && filename[1] != '.')
						{  // prepend if not already
							filename += 3;  // 3 = '..'
							STRCAT(buff, "..", limit);
						}
					}
					STRCAT(buff, filename, limit);
				}
			};
			/// @brief String utilities helper class used internally. You should not use it.
			class Str : base::StaticClass
			{
			public:
				/// @brief Checks if character is digit. Dont use libc implementation of it to prevent locale issues.
				static inline bool isDigit(char c)
				{
					return c >= '0' && c <= '9';
				}

				/// @brief Matches wildcards, '*' and '?' only supported.
				static bool wildCardMatch(const char* str, const char* pattern)
				{
					while(*pattern)
					{
						switch(*pattern)
						{
						case '?':
						if(!*str)
							return false;
						++str;
						++pattern;
						break;
						case '*':
						if(wildCardMatch(str, pattern + 1))
							return true;
						if(*str && wildCardMatch(str + 1, pattern))
							return true;
						return false;
						break;
						default:
						if(*str++ != *pattern++)
							return false;
						break;
						}
					}
					return !*str && !*pattern;
				}

				/// @brief Trims string from start
				/// @param [in,out] str String to trim
				static inline std::string& ltrim(std::string& str)
				{
					str.erase(str.begin(), std::find_if(str.begin(), str.end(), std::not_fn(static_cast<int(*)(int)>(std::isspace))));
					return str;
				}

				/// @brief Trim string from end
				/// @param [in,out] str String to trim
				static inline std::string& rtrim(std::string& str)
				{
					str.erase(std::find_if(str.rbegin(), str.rend(), std::not_fn(static_cast<int(*)(int)>(std::isspace))).base(), str.end());
					return str;
				}

				/// @brief Trims string from left and right
				/// @param [in,out] str String to trim
				static inline std::string& trim(std::string& str)
				{
					return ltrim(rtrim(str));
				}

				/// @brief Determines whether or not str starts with specified string
				/// @param str String to check
				/// @param start String to check against
				/// @return Returns true if starts with specified string, false otherwise
				static inline bool startsWith(const std::string& str, const std::string& start)
				{
					return (str.length() >= start.length()) && (str.compare(0, start.length(), start) == 0);
				}

				/// @brief Determines whether or not str ends with specified string
				/// @param str String to check
				/// @param end String to check against
				/// @return Returns true if ends with specified string, false otherwise
				static inline bool endsWith(const std::string& str, const std::string& end)
				{
					return (str.length() >= end.length()) && (str.compare(str.length() - end.length(), end.length(), end) == 0);
				}

				/// @brief Replaces all instances of replaceWhat with 'replaceWith'. Original variable is changed for performance.
				/// @param [in,out] str String to replace from
				/// @param replaceWhat Character to replace
				/// @param replaceWith Character to replace with
				/// @return Modified version of str
				static inline std::string& replaceAll(std::string& str, char replaceWhat, char replaceWith)
				{
					std::replace(str.begin(), str.end(), replaceWhat, replaceWith);
					return str;
				}

				/// @brief Replaces all instances of 'replaceWhat' with 'replaceWith'. (String version) Replaces in place
				/// @param str String to replace from
				/// @param replaceWhat Character to replace
				/// @param replaceWith Character to replace with
				/// @return Modified (original) str
				static inline std::string& replaceAll(std::string& str, const std::string& replaceWhat, // NOLINT
						const std::string& replaceWith)
				{
					if(replaceWhat == replaceWith)
						return str;
					std::size_t foundAt = std::string::npos;
					while((foundAt = str.find(replaceWhat, foundAt + 1)) != std::string::npos)
					{
						str.replace(foundAt, replaceWhat.length(), replaceWith);
					}
					return str;
				}

				static void replaceFirstWithEscape(base::type::string_t& str, const base::type::string_t& replaceWhat, // NOLINT
						const base::type::string_t& replaceWith)
				{
					std::size_t foundAt = base::type::string_t::npos;
					while((foundAt = str.find(replaceWhat, foundAt + 1)) != base::type::string_t::npos)
					{
						if(foundAt > 0 && str[foundAt - 1] == base::consts::kFormatSpecifierChar)
						{
							str.erase(foundAt > 0 ? foundAt - 1 : 0, 1);
							++foundAt;
						}
						else
						{
							str.replace(foundAt, replaceWhat.length(), replaceWith);
							return;
						}
					}
				}
#if defined(ELPP_UNICODE)
				static void replaceFirstWithEscape(base::type::string_t& str, const base::type::string_t& replaceWhat, // NOLINT
						const std::string& replaceWith)
				{
					replaceFirstWithEscape(str, replaceWhat, base::type::string_t(replaceWith.begin(), replaceWith.end()));
				}
#endif  // defined(ELPP_UNICODE)
				/// @brief Converts string to uppercase
				/// @param str String to convert
				/// @return Uppercase string
				static inline std::string& toUpper(std::string& str)
				{
					std::transform(str.begin(), str.end(), str.begin(), ::toupper);
					return str;
				}

				/// @brief Compares cstring equality - uses strcmp
				static inline bool cStringEq(const char* s1, const char* s2)
				{
					if(s1 == nullptr && s2 == nullptr) return true;
					if(s1 == nullptr || s2 == nullptr) return false;
					return strcmp(s1, s2) == 0;
				}

				/// @brief Compares cstring equality (case-insensitive) - uses toupper(char)
				/// Dont use strcasecmp because of CRT (VC++)
				static bool cStringCaseEq(const char* s1, const char* s2)
				{
					if(s1 == nullptr && s2 == nullptr) return true;
					if(s1 == nullptr || s2 == nullptr) return false;
					if(strlen(s1) != strlen(s2)) return false;
					while(*s1 != '\0' && *s2 != '\0')
					{
						if(::toupper(*s1) != ::toupper(*s2)) return false;
						++s1;
						++s2;
					}
					return true;
				}

				/// @brief Returns true if c exist in str
				static inline bool contains(const char* str, char c)
				{
					for(; *str; ++str)
					{
						if(*str == c)
							return true;
					}
					return false;
				}

				static inline char* convertAndAddToBuff(std::size_t n, int len, char* buf, const char* bufLim, bool zeroPadded = true)
				{
					char localBuff[10] = "";
					char* p = localBuff + sizeof(localBuff) - 2;
					if(n > 0)
					{
						for(; n > 0 && p > localBuff && len > 0; n /= 10, --len)
							*--p = static_cast<char>(n % 10 + '0');
					}
					else
					{
						*--p = '0';
						--len;
					}
					if(zeroPadded)
						while(p > localBuff && len-- > 0) *--p = static_cast<char>('0');
					return addToBuff(p, buf, bufLim);
				}

				static inline char* addToBuff(const char* str, char* buf, const char* bufLim)
				{
					while((buf < bufLim) && ((*buf = *str++) != '\0'))
						++buf;
					return buf;
				}

				static inline char* clearBuff(char buff[], std::size_t lim)
				{
					STRCPY(buff, "", lim);
					ELPP_UNUSED(lim);  // For *nix we dont have anything using lim in above STRCPY macro
					return buff;
				}

				/// @brief Converst wchar* to char*
				///        NOTE: Need to free return value after use!
				static char* wcharPtrToCharPtr(const wchar_t* line)
				{
					std::size_t len_ = wcslen(line) + 1;
					char* buff_ = static_cast<char*>(malloc(len_ + 1));
#      if ELPP_OS_UNIX || (ELPP_OS_WINDOWS && !ELPP_CRT_DBG_WARNINGS)
					std::wcstombs(buff_, line, len_);
#      elif ELPP_OS_WINDOWS
					std::size_t convCount_ = 0;
					mbstate_t mbState_;
					::memset(static_cast<void*>(&mbState_), 0, sizeof(mbState_));
					wcsrtombs_s(&convCount_, buff_, len_, &line, len_, &mbState_);
#      endif  // ELPP_OS_UNIX || (ELPP_OS_WINDOWS && !ELPP_CRT_DBG_WARNINGS)
					return buff_;
				}
			};
			/// @brief Operating System helper static class used internally. You should not use it.
			class OS : base::StaticClass
			{
			public:
#if ELPP_OS_WINDOWS
				/// @brief Gets environment variables for Windows based OS.
				///        We are not using <code>getenv(const char*)</code> because of CRT deprecation
				/// @param varname Variable name to get environment variable value for
				/// @return If variable exist the value of it otherwise nullptr
				static const char* getWindowsEnvironmentVariable(const char* varname)
				{
					const DWORD bufferLen = 50;
					static char buffer[bufferLen];
					if(GetEnvironmentVariableA(varname, buffer, bufferLen))
					{
						return buffer;
					}
					return nullptr;
				}
#endif  // ELPP_OS_WINDOWS
#if ELPP_OS_ANDROID
				/// @brief Reads android property value
				static inline std::string getProperty(const char* prop)
				{
					char propVal[PROP_VALUE_MAX + 1];
					int ret = __system_property_get(prop, propVal);
					return ret == 0 ? std::string() : std::string(propVal);
				}

				/// @brief Reads android device name
				static std::string getDeviceName(void)
				{
					std::stringstream ss;
					std::string manufacturer = getProperty("ro.product.manufacturer");
					std::string model = getProperty("ro.product.model");
					if(manufacturer.empty() || model.empty())
					{
						return std::string();
					}
					ss << manufacturer << "-" << model;
					return ss.str();
				}
#endif  // ELPP_OS_ANDROID

				/// @brief Runs command on terminal and returns the output.
				///
				/// @detail This is applicable only on unix based systems, for all other OS, an empty string is returned.
				/// @param command Bash command
				/// @return Result of bash output or empty string if no result found.
				static const std::string getBashOutput(const char* command)
				{
#if (ELPP_OS_UNIX && !ELPP_OS_ANDROID && !ELPP_CYGWIN)
					if(command == nullptr)
					{
						return std::string();
					}
					FILE* proc = nullptr;
					if((proc = popen(command, "r")) == nullptr)
					{
						ELPP_INTERNAL_ERROR("\nUnable to run command [" << command << "]", true);
						return std::string();
					}
					char hBuff[4096];
					if(fgets(hBuff, sizeof(hBuff), proc) != nullptr)
					{
						pclose(proc);
						if(hBuff[strlen(hBuff) - 1] == '\n')
						{
							hBuff[strlen(hBuff) - 1] = '\0';
						}
						return std::string(hBuff);
					}
					return std::string();
#else
					ELPP_UNUSED(command);
					return std::string();
#endif  // (ELPP_OS_UNIX && !ELPP_OS_ANDROID && !ELPP_CYGWIN)
				}

				/// @brief Gets environment variable. This is cross-platform and CRT safe (for VC++)
				/// @param variableName Environment variable name
				/// @param defaultVal If no environment variable or value found the value to return by default
				/// @param alternativeBashCommand If environment variable not found what would be alternative bash command
				///        in order to look for value user is looking for. E.g, for 'user' alternative command will 'whoami'
				static std::string getEnvironmentVariable(const char* variableName, const char* defaultVal, const char* alternativeBashCommand = nullptr)
				{
#if ELPP_OS_UNIX
					const char* val = getenv(variableName);
#elif ELPP_OS_WINDOWS
					const char* val = getWindowsEnvironmentVariable(variableName);
#endif  // ELPP_OS_UNIX
					if((val == nullptr) || ((strcmp(val, "") == 0)))
					{
#if ELPP_OS_UNIX && defined(ELPP_FORCE_ENV_VAR_FROM_BASH)
						// Try harder on unix-based systems
						std::string valBash = base::utils::OS::getBashOutput(alternativeBashCommand);
						if(valBash.empty())
						{
							return std::string(defaultVal);
						}
						else
						{
							return valBash;
						}
#elif ELPP_OS_WINDOWS || ELPP_OS_UNIX
						ELPP_UNUSED(alternativeBashCommand);
						return std::string(defaultVal);
#endif  // ELPP_OS_UNIX && defined(ELPP_FORCE_ENV_VAR_FROM_BASH)
					}
					return std::string(val);
				}
				/// @brief Gets current username.
				static inline std::string currentUser(void)
				{
#if ELPP_OS_UNIX && !ELPP_OS_ANDROID
					return getEnvironmentVariable("USER", base::consts::kUnknownUser, "whoami");
#elif ELPP_OS_WINDOWS
					return getEnvironmentVariable("USERNAME", base::consts::kUnknownUser);
#elif ELPP_OS_ANDROID
					ELPP_UNUSED(base::consts::kUnknownUser);
					return std::string("android");
#else
					return std::string();
#endif  // ELPP_OS_UNIX && !ELPP_OS_ANDROID
				}

				/// @brief Gets current host name or computer name.
				///
				/// @detail For android systems this is device name with its manufacturer and model seperated by hyphen
				static inline std::string currentHost(void)
				{
#if ELPP_OS_UNIX && !ELPP_OS_ANDROID
					return getEnvironmentVariable("HOSTNAME", base::consts::kUnknownHost, "hostname");
#elif ELPP_OS_WINDOWS
					return getEnvironmentVariable("COMPUTERNAME", base::consts::kUnknownHost);
#elif ELPP_OS_ANDROID
					ELPP_UNUSED(base::consts::kUnknownHost);
					return getDeviceName();
#else
					return std::string();
#endif  // ELPP_OS_UNIX && !ELPP_OS_ANDROID
				}
				/// @brief Whether or not terminal supports colors
				static inline bool termSupportsColor(void)
				{
					std::string term = getEnvironmentVariable("TERM", "");
					return term == "xterm" || term == "xterm-color" || term == "xterm-256color" ||
						term == "screen" || term == "linux" || term == "cygwin";
				}
			};
			extern std::string s_currentUser;
			extern std::string s_currentHost;
			extern bool s_termSupportsColor;
#define ELPP_INITI_BASIC_DECLR \
    namespace el {\
        namespace base {\
            namespace utils {\
                std::string s_currentUser = el::base::utils::OS::currentUser(); \
                std::string s_currentHost = el::base::utils::OS::currentHost(); \
                bool s_termSupportsColor = el::base::utils::OS::termSupportsColor(); \
            }\
        }\
   }
			/// @brief Contains utilities for cross-platform date/time. This class make use of el::base::utils::Str
			class DateTime : base::StaticClass
			{
			public:
				/// @brief Cross platform gettimeofday for Windows and unix platform. This can be used to determine current millisecond.
				///
				/// @detail For unix system it uses gettimeofday(timeval*, timezone*) and for Windows, a seperate implementation is provided
				/// @param [in,out] tv Pointer that gets updated
				static void gettimeofday(struct timeval* tv)
				{
#if ELPP_OS_WINDOWS
					if(tv != nullptr)
					{
#   if ELPP_COMPILER_MSVC || defined(_MSC_EXTENSIONS)
						const unsigned __int64 delta_ = 11644473600000000Ui64;
#   else
						const unsigned __int64 delta_ = 11644473600000000ULL;
#   endif  // ELPP_COMPILER_MSVC || defined(_MSC_EXTENSIONS)
						const double secOffSet = 0.000001;
						const unsigned long usecOffSet = 1000000;
						FILETIME fileTime;
						GetSystemTimeAsFileTime(&fileTime);
						unsigned __int64 present = 0;
						present |= fileTime.dwHighDateTime;
						present = present << 32;
						present |= fileTime.dwLowDateTime;
						present /= 10;  // mic-sec
					   // Subtract the difference
						present -= delta_;
						tv->tv_sec = static_cast<long>(present * secOffSet);
						tv->tv_usec = static_cast<long>(present % usecOffSet);
					}
#else
					::gettimeofday(tv, nullptr);
#endif  // ELPP_OS_WINDOWS
				}

				/// @brief Get current date and time with milliseconds
				/// @returns struct tm about now time.
				static inline struct ::tm getCurrentTm()
				{
					struct timeval currTime;
					gettimeofday(&currTime);
					struct ::tm timeInfo;
					buildTimeInfo(&currTime, &timeInfo);
					return timeInfo;
				}

				/// @brief Gets current date and time with milliseconds.
				/// @param format User provided date/time format
				/// @param msWidth A pointer to base::MillisecondsWidth from configuration (non-null)
				/// @returns string based date time in specified format.
				static inline std::string getDateTime(const char* format, const base::MillisecondsWidth* msWidth)
				{
					struct timeval currTime;
					gettimeofday(&currTime);
					struct ::tm timeInfo;
					buildTimeInfo(&currTime, &timeInfo);
					const int kBuffSize = 30;
					char buff_[kBuffSize] = "";
					parseFormat(buff_, kBuffSize, format, &timeInfo, static_cast<std::size_t>(currTime.tv_usec / msWidth->m_offset), msWidth);
					return std::string(buff_);
				}

				/// @brief Formats time to get unit accordingly, units like second if > 1000 or minutes if > 60000 etc
				static base::type::string_t formatTime(unsigned long long time, base::TimestampUnit timestampUnit)
				{
					double result = static_cast<double>(time);
					base::type::EnumType start = static_cast<base::type::EnumType>(timestampUnit);
					const base::type::char_t* unit = base::consts::kTimeFormats[start].unit;
					for(base::type::EnumType i = start; i < base::consts::kTimeFormatsCount - 1; ++i)
					{
						if(result <= base::consts::kTimeFormats[i].value)
						{
							break;
						}
						result /= base::consts::kTimeFormats[i].value;
						unit = base::consts::kTimeFormats[i + 1].unit;
					}
					base::type::stringstream_t ss;
					ss << result << " " << unit;
					return ss.str();
				}

				/// @brief Gets time difference in milli/micro second depending on timestampUnit
				static inline unsigned long long getTimeDifference(const struct timeval& endTime, const struct timeval& startTime, base::TimestampUnit timestampUnit)
				{
					if(timestampUnit == base::TimestampUnit::Microsecond)
					{
						return static_cast<unsigned long long>(static_cast<unsigned long long>(1000000 * endTime.tv_sec + endTime.tv_usec) -
								static_cast<unsigned long long>(1000000 * startTime.tv_sec + startTime.tv_usec));
					}
					else
					{
						return static_cast<unsigned long long>((((endTime.tv_sec - startTime.tv_sec) * 1000000) + (endTime.tv_usec - startTime.tv_usec)) / 1000);
					}
				}

			private:
				static inline struct ::tm* buildTimeInfo(struct timeval* currTime, struct ::tm* timeInfo)
				{
#if ELPP_OS_UNIX
					time_t rawTime = currTime->tv_sec;
					::localtime_r(&rawTime, timeInfo);
					return timeInfo;
#else
#   if ELPP_COMPILER_MSVC
					ELPP_UNUSED(currTime);
					time_t t;
					_time64(&t);
					localtime_s(timeInfo, &t);
					return timeInfo;
#   else
					// For any other compilers that don't have CRT warnings issue e.g, MinGW or TDM GCC- we use different method
					time_t rawTime = currTime->tv_sec;
					struct tm* tmInf = localtime(&rawTime);
					*timeInfo = *tmInf;
					return timeInfo;
#   endif  // ELPP_COMPILER_MSVC
#endif  // ELPP_OS_UNIX
				}
				static char* parseFormat(char* buf, std::size_t bufSz, const char* format, const struct tm* tInfo,
						std::size_t msec, const base::MillisecondsWidth* msWidth)
				{
					const char* bufLim = buf + bufSz;
					for(; *format; ++format)
					{
						if(*format == base::consts::kFormatSpecifierChar)
						{
							switch(*++format)
							{
							case base::consts::kFormatSpecifierChar:  // Escape
							break;
							case '\0':  // End
							--format;
							break;
							case 'd':  // Day
							buf = base::utils::Str::convertAndAddToBuff(tInfo->tm_mday, 2, buf, bufLim);
							continue;
							case 'a':  // Day of week (short)
							buf = base::utils::Str::addToBuff(base::consts::kDaysAbbrev[tInfo->tm_wday], buf, bufLim);
							continue;
							case 'A':  // Day of week (long)
							buf = base::utils::Str::addToBuff(base::consts::kDays[tInfo->tm_wday], buf, bufLim);
							continue;
							case 'M':  // month
							buf = base::utils::Str::convertAndAddToBuff(tInfo->tm_mon + 1, 2, buf, bufLim);
							continue;
							case 'b':  // month (short)
							buf = base::utils::Str::addToBuff(base::consts::kMonthsAbbrev[tInfo->tm_mon], buf, bufLim);
							continue;
							case 'B':  // month (long)
							buf = base::utils::Str::addToBuff(base::consts::kMonths[tInfo->tm_mon], buf, bufLim);
							continue;
							case 'y':  // year (two digits)
							buf = base::utils::Str::convertAndAddToBuff(tInfo->tm_year + base::consts::kYearBase, 2, buf, bufLim);
							continue;
							case 'Y':  // year (four digits)
							buf = base::utils::Str::convertAndAddToBuff(tInfo->tm_year + base::consts::kYearBase, 4, buf, bufLim);
							continue;
							case 'h':  // hour (12-hour)
							buf = base::utils::Str::convertAndAddToBuff(tInfo->tm_hour % 12, 2, buf, bufLim);
							continue;
							case 'H':  // hour (24-hour)
							buf = base::utils::Str::convertAndAddToBuff(tInfo->tm_hour, 2, buf, bufLim);
							continue;
							case 'm':  // minute
							buf = base::utils::Str::convertAndAddToBuff(tInfo->tm_min, 2, buf, bufLim);
							continue;
							case 's':  // second
							buf = base::utils::Str::convertAndAddToBuff(tInfo->tm_sec, 2, buf, bufLim);
							continue;
							case 'z':  // milliseconds
							case 'g':
							buf = base::utils::Str::convertAndAddToBuff(msec, msWidth->m_width, buf, bufLim);
							continue;
							case 'F':  // AM/PM
							buf = base::utils::Str::addToBuff((tInfo->tm_hour >= 12) ? base::consts::kPm : base::consts::kAm, buf, bufLim);
							continue;
							default:
							continue;
							}
						}
						if(buf == bufLim) break;
						*buf++ = *format;
					}
					return buf;
				}
			};
			/// @brief Command line arguments for application if specified using el::Helpers::setArgs(..) or START_EASYLOGGINGPP(..)
			class CommandLineArgs
			{
			public:
				CommandLineArgs(void)
				{
					setArgs(0, static_cast<char**>(nullptr));
				}
				CommandLineArgs(int argc, const char** argv)
				{
					setArgs(argc, argv);
				}
				CommandLineArgs(int argc, char** argv)
				{
					setArgs(argc, argv);
				}
				virtual ~CommandLineArgs(void)
				{
				}
				/// @brief Sets arguments and parses them
				inline void setArgs(int argc, const char** argv)
				{
					setArgs(argc, const_cast<char**>(argv));
				}
				/// @brief Sets arguments and parses them
				inline void setArgs(int argc, char** argv)
				{
					m_params.clear();
					m_paramsWithValue.clear();
					if(argc == 0 || argv == nullptr)
					{
						return;
					}
					m_argc = argc;
					m_argv = argv;
					for(int i = 1; i < m_argc; ++i)
					{
						const char* v = (strstr(m_argv[i], "="));
						if(v != nullptr && strlen(v) > 0)
						{
							std::string key = std::string(m_argv[i]);
							key = key.substr(0, key.find_first_of('='));
							if(hasParamWithValue(key.c_str()))
							{
								ELPP_INTERNAL_INFO(1, "Skipping [" << key << "] arg since it already has value ["
									<< getParamValue(key.c_str()) << "]");
							}
							else
							{
								m_paramsWithValue.insert(std::make_pair(key, std::string(v + 1)));
							}
						}
						if(v == nullptr)
						{
							if(hasParam(m_argv[i]))
							{
								ELPP_INTERNAL_INFO(1, "Skipping [" << m_argv[i] << "] arg since it already exists");
							}
							else
							{
								m_params.push_back(std::string(m_argv[i]));
							}
						}
					}
				}
				/// @brief Returns true if arguments contain paramKey with a value (seperated by '=')
				inline bool hasParamWithValue(const char* paramKey) const
				{
					return m_paramsWithValue.find(std::string(paramKey)) != m_paramsWithValue.end();
				}
				/// @brief Returns value of arguments
				/// @see hasParamWithValue(const char*)
				inline const char* getParamValue(const char* paramKey) const
				{
					return m_paramsWithValue.find(std::string(paramKey))->second.c_str();
				}
				/// @brief Return true if arguments has a param (not having a value) i,e without '='
				inline bool hasParam(const char* paramKey) const
				{
					return std::find(m_params.begin(), m_params.end(), std::string(paramKey)) != m_params.end();
				}
				/// @brief Returns true if no params available. This exclude argv[0]
				inline bool empty(void) const
				{
					return m_params.empty() && m_paramsWithValue.empty();
				}
				/// @brief Returns total number of arguments. This exclude argv[0]
				inline std::size_t size(void) const
				{
					return m_params.size() + m_paramsWithValue.size();
				}
				inline friend base::type::ostream_t& operator<<(base::type::ostream_t& os, const CommandLineArgs& c)
				{
					for(int i = 1; i < c.m_argc; ++i)
					{
						os << ELPP_LITERAL("[") << c.m_argv[i] << ELPP_LITERAL("]");
						if(i < c.m_argc - 1)
						{
							os << ELPP_LITERAL(" ");
						}
					}
					return os;
				}

			private:
				int m_argc;
				char** m_argv;
				std::map<std::string, std::string> m_paramsWithValue;
				std::vector<std::string> m_params;
			};
			/// @brief Abstract registry (aka repository) that provides basic interface for pointer repository specified by T_Ptr type.
			///
			/// @detail Most of the functions are virtual final methods but anything implementing this abstract class should implement
			/// unregisterAll() and deepCopy(const AbstractRegistry<T_Ptr, Container>&) and write registerNew() method according to container
			/// and few more methods; get() to find element, unregister() to unregister single entry.
			/// Please note that this is thread-unsafe and should also implement thread-safety mechanisms in implementation.
			template <typename T_Ptr, typename Container>
			class AbstractRegistry : public base::threading::ThreadSafe
			{
			public:
				typedef typename Container::iterator iterator;
				typedef typename Container::const_iterator const_iterator;

				/// @brief Default constructor
				AbstractRegistry(void)
				{
				}

				/// @brief Move constructor that is useful for base classes
				AbstractRegistry(AbstractRegistry&& sr)
				{
					if(this == &sr)
					{
						return;
					}
					unregisterAll();
					m_list = std::move(sr.m_list);
				}

				bool operator==(const AbstractRegistry<T_Ptr, Container>& other)
				{
					if(size() != other.size())
					{
						return false;
					}
					for(std::size_t i = 0; i < m_list.size(); ++i)
					{
						if(m_list.at(i) != other.m_list.at(i))
						{
							return false;
						}
					}
					return true;
				}

				bool operator!=(const AbstractRegistry<T_Ptr, Container>& other)
				{
					if(size() != other.size())
					{
						return true;
					}
					for(std::size_t i = 0; i < m_list.size(); ++i)
					{
						if(m_list.at(i) != other.m_list.at(i))
						{
							return true;
						}
					}
					return false;
				}

				/// @brief Assignment move operator
				AbstractRegistry& operator=(AbstractRegistry&& sr)
				{
					if(this == &sr)
					{
						return *this;
					}
					unregisterAll();
					m_list = std::move(sr.m_list);
					return *this;
				}

				virtual ~AbstractRegistry(void)
				{
				}

				/// @return Iterator pointer from start of repository
				virtual inline iterator begin(void) ELPP_FINAL
				{
					return m_list.begin();
				}

				/// @return Iterator pointer from end of repository
				virtual inline iterator end(void) ELPP_FINAL
				{
					return m_list.end();
				}


				/// @return Constant iterator pointer from start of repository
				virtual inline const_iterator cbegin(void) const ELPP_FINAL
				{
					return m_list.cbegin();
				}

				/// @return End of repository
				virtual inline const_iterator cend(void) const ELPP_FINAL
				{
					return m_list.cend();
				}

				/// @return Whether or not repository is empty
				virtual inline bool empty(void) const ELPP_FINAL
				{
					return m_list.empty();
				}

				/// @return Size of repository
				virtual inline std::size_t size(void) const ELPP_FINAL
				{
					return m_list.size();
				}

				/// @brief Returns underlying container by reference
				virtual inline Container& list(void) ELPP_FINAL
				{
					return m_list;
				}

				/// @brief Returns underlying container by constant reference.
				virtual inline const Container& list(void) const ELPP_FINAL
				{
					return m_list;
				}

				/// @brief Unregisters all the pointers from current repository.
				virtual void unregisterAll(void) = 0;

			protected:
				virtual void deepCopy(const AbstractRegistry<T_Ptr, Container>&) = 0;
				void reinitDeepCopy(const AbstractRegistry<T_Ptr, Container>& sr)
				{
					unregisterAll();
					deepCopy(sr);
				}

			private:
				Container m_list;
			};

			/// @brief A pointer registry mechanism to manage memory and provide search functionalities. (non-predicate version)
			///
			/// @detail NOTE: This is thread-unsafe implementation (although it contains lock function, it does not use these functions)
			///         of AbstractRegistry<T_Ptr, Container>. Any implementation of this class should be
			///         explicitly (by using lock functions)
			template <typename T_Ptr, typename T_Key = const char*>
			class Registry : public AbstractRegistry<T_Ptr, std::map<T_Key, T_Ptr*>>
			{
			public:
				typedef typename Registry<T_Ptr, T_Key>::iterator iterator;
				typedef typename Registry<T_Ptr, T_Key>::const_iterator const_iterator;

				Registry(void)
				{
				}

				/// @brief Copy constructor that is useful for base classes. Try to avoid this constructor, use move constructor.
				Registry(const Registry& sr) : AbstractRegistry<T_Ptr, std::vector<T_Ptr*>>()
				{
					if(this == &sr)
					{
						return;
					}
					this->reinitDeepCopy(sr);
				}

				/// @brief Assignment operator that unregisters all the existing registeries and deeply copies each of repo element
				/// @see unregisterAll()
				/// @see deepCopy(const AbstractRegistry&)
				Registry& operator=(const Registry& sr)
				{
					if(this == &sr)
					{
						return *this;
					}
					this->reinitDeepCopy(sr);
					return *this;
				}

				virtual ~Registry(void)
				{
					unregisterAll();
				}

			protected:
				virtual inline void unregisterAll(void) ELPP_FINAL
				{
					if(!this->empty())
					{
						for(auto&& curr : this->list())
						{
							base::utils::safeDelete(curr.second);
						}
						this->list().clear();
					}
				}

				/// @brief Registers new registry to repository.
				virtual inline void registerNew(const T_Key& uniqKey, T_Ptr* ptr) ELPP_FINAL
				{
					unregister(uniqKey);
					this->list().insert(std::make_pair(uniqKey, ptr));
				}

				/// @brief Unregisters single entry mapped to specified unique key
				inline void unregister(const T_Key& uniqKey)
				{
					T_Ptr* existing = get(uniqKey);
					if(existing != nullptr)
					{
						base::utils::safeDelete(existing);
						this->list().erase(uniqKey);
					}
				}

				/// @brief Gets pointer from repository. If none found, nullptr is returned.
				inline T_Ptr* get(const T_Key& uniqKey)
				{
					iterator it = this->list().find(uniqKey);
					return it == this->list().end()
						? nullptr
						: it->second;
				}

			private:
				virtual inline void deepCopy(const AbstractRegistry<T_Ptr, std::map<T_Key, T_Ptr*>>& sr) ELPP_FINAL
				{
					for(const_iterator it = sr.cbegin(); it != sr.cend(); ++it)
					{
						registerNew(it->first, new T_Ptr(*it->second));
					}
				}
			};

			/// @brief A pointer registry mechanism to manage memory and provide search functionalities. (predicate version)
			///
			/// @detail NOTE: This is thread-unsafe implementation of AbstractRegistry<T_Ptr, Container>. Any implementation of this class
			/// should be made thread-safe explicitly
			template <typename T_Ptr, typename Pred>
			class RegistryWithPred : public AbstractRegistry<T_Ptr, std::vector<T_Ptr*>>
			{
			public:
				typedef typename RegistryWithPred<T_Ptr, Pred>::iterator iterator;
				typedef typename RegistryWithPred<T_Ptr, Pred>::const_iterator const_iterator;

				RegistryWithPred(void)
				{
				}

				virtual ~RegistryWithPred(void)
				{
					unregisterAll();
				}

				/// @brief Copy constructor that is useful for base classes. Try to avoid this constructor, use move constructor.
				RegistryWithPred(const RegistryWithPred& sr) : AbstractRegistry<T_Ptr, std::vector<T_Ptr*>>()
				{
					if(this == &sr)
					{
						return;
					}
					this->reinitDeepCopy(sr);
				}

				/// @brief Assignment operator that unregisters all the existing registeries and deeply copies each of repo element
				/// @see unregisterAll()
				/// @see deepCopy(const AbstractRegistry&)
				RegistryWithPred& operator=(const RegistryWithPred& sr)
				{
					if(this == &sr)
					{
						return *this;
					}
					this->reinitDeepCopy(sr);
					return *this;
				}

				friend inline base::type::ostream_t& operator<<(base::type::ostream_t& os, const RegistryWithPred& sr)
				{
					for(const_iterator it = sr.list().begin(); it != sr.list().end(); ++it)
					{
						os << ELPP_LITERAL("    ") << **it << ELPP_LITERAL("\n");
					}
					return os;
				}

			protected:
				virtual inline void unregisterAll(void) ELPP_FINAL
				{
					if(!this->empty())
					{
						for(auto&& curr : this->list())
						{
							base::utils::safeDelete(curr);
						}
						this->list().clear();
					}
				}

				virtual void unregister(T_Ptr*& ptr) ELPP_FINAL
				{
					if(ptr)
					{
						iterator iter = this->begin();
						for(; iter != this->end(); ++iter)
						{
							if(ptr == *iter)
							{
								break;
							}
						}
						if(iter != this->end() && *iter != nullptr)
						{
							this->list().erase(iter);
							base::utils::safeDelete(*iter);
						}
					}
				}

				virtual inline void registerNew(T_Ptr* ptr) ELPP_FINAL
				{
					this->list().push_back(ptr);
				}

				/// @brief Gets pointer from repository with speicifed arguments. Arguments are passed to predicate
				/// in order to validate pointer.
				template <typename T, typename T2>
				inline T_Ptr* get(const T& arg1, const T2 arg2)
				{
					iterator iter = std::find_if(this->list().begin(), this->list().end(), Pred(arg1, arg2));
					if(iter != this->list().end() && *iter != nullptr)
					{
						return *iter;
					}
					return nullptr;
				}

			private:
				virtual inline void deepCopy(const AbstractRegistry<T_Ptr, std::vector<T_Ptr*>>& sr)
				{
					for(const_iterator it = sr.list().begin(); it != sr.list().end(); ++it)
					{
						registerNew(new T_Ptr(**it));
					}
				}
			};

		}  // namespace utils
	} // namespace base
	/// @brief Base of Easylogging++ friendly class
	///
	/// @detail After inheriting this class publicly, implement pure-virtual function `void log(std::ostream&) const`
	class Loggable
	{
	public:
		virtual ~Loggable(void)
		{
		}
		virtual void log(el::base::type::ostream_t&) const = 0;
	private:
		friend inline el::base::type::ostream_t& operator<<(el::base::type::ostream_t& os, const Loggable& loggable)
		{
			loggable.log(os);
			return os;
		}
	};
	namespace base {
		/// @brief Represents log format containing flags and date format. This is used internally to start initial log
		class LogFormat : public Loggable
		{
		public:
			LogFormat(void) :
				m_level(Level::Unknown),
				m_userFormat(base::type::string_t()),
				m_format(base::type::string_t()),
				m_dateTimeFormat(std::string()),
				m_flags(0x0)
			{
			}

			LogFormat(Level level, const base::type::string_t& format)
				: m_level(level), m_userFormat(format)
			{
				parseFromFormat(m_userFormat);
			}

			LogFormat(const LogFormat& logFormat)
			{
				m_level = logFormat.m_level;
				m_userFormat = logFormat.m_userFormat;
				m_format = logFormat.m_format;
				m_dateTimeFormat = logFormat.m_dateTimeFormat;
				m_flags = logFormat.m_flags;
			}

			LogFormat(LogFormat&& logFormat)
			{
				m_level = std::move(logFormat.m_level);
				m_userFormat = std::move(logFormat.m_userFormat);
				m_format = std::move(logFormat.m_format);
				m_dateTimeFormat = std::move(logFormat.m_dateTimeFormat);
				m_flags = std::move(logFormat.m_flags);
			}

			LogFormat& operator=(const LogFormat& logFormat)
			{
				m_level = logFormat.m_level;
				m_userFormat = logFormat.m_userFormat;
				m_dateTimeFormat = logFormat.m_dateTimeFormat;
				m_flags = logFormat.m_flags;
				return *this;
			}

			virtual ~LogFormat(void)
			{
			}

			inline bool operator==(const LogFormat& other)
			{
				return m_level == other.m_level && m_userFormat == other.m_userFormat && m_format == other.m_format &&
					m_dateTimeFormat == other.m_dateTimeFormat && m_flags == other.m_flags;
			}

			/// @brief Updates format to be used while logging.
			/// @param userFormat User provided format
			void parseFromFormat(const base::type::string_t& userFormat)
			{
				// We make copy because we will be changing the format
				// i.e, removing user provided date format from original format
				// and then storing it.
				base::type::string_t formatCopy = userFormat;
				m_flags = 0x0;
				auto conditionalAddFlag = [&](const base::type::char_t* specifier, base::FormatFlags flag)
				{
					std::size_t foundAt = base::type::string_t::npos;
					while((foundAt = formatCopy.find(specifier, foundAt + 1)) != base::type::string_t::npos)
					{
						if(foundAt > 0 && formatCopy[foundAt - 1] == base::consts::kFormatSpecifierChar)
						{
							if(hasFlag(flag))
							{
								// If we already have flag we remove the escape chars so that '%%' is turned to '%'
								// even after specifier resolution - this is because we only replaceFirst specifier
								formatCopy.erase(foundAt > 0 ? foundAt - 1 : 0, 1);
								++foundAt;
							}
						}
						else
						{
							if(!hasFlag(flag)) addFlag(flag);
						}
					}
				};
				conditionalAddFlag(base::consts::kAppNameFormatSpecifier, base::FormatFlags::AppName);
				conditionalAddFlag(base::consts::kSeverityLevelFormatSpecifier, base::FormatFlags::Level);
				conditionalAddFlag(base::consts::kSeverityLevelShortFormatSpecifier, base::FormatFlags::LevelShort);
				conditionalAddFlag(base::consts::kLoggerIdFormatSpecifier, base::FormatFlags::LoggerId);
				conditionalAddFlag(base::consts::kThreadIdFormatSpecifier, base::FormatFlags::ThreadId);
				conditionalAddFlag(base::consts::kLogFileFormatSpecifier, base::FormatFlags::File);
				conditionalAddFlag(base::consts::kLogFileBaseFormatSpecifier, base::FormatFlags::FileBase);
				conditionalAddFlag(base::consts::kLogLineFormatSpecifier, base::FormatFlags::Line);
				conditionalAddFlag(base::consts::kLogLocationFormatSpecifier, base::FormatFlags::Location);
				conditionalAddFlag(base::consts::kLogFunctionFormatSpecifier, base::FormatFlags::Function);
				conditionalAddFlag(base::consts::kCurrentUserFormatSpecifier, base::FormatFlags::User);
				conditionalAddFlag(base::consts::kCurrentHostFormatSpecifier, base::FormatFlags::Host);
				conditionalAddFlag(base::consts::kMessageFormatSpecifier, base::FormatFlags::LogMessage);
				conditionalAddFlag(base::consts::kVerboseLevelFormatSpecifier, base::FormatFlags::VerboseLevel);
				// For date/time we need to extract user's date format first
				std::size_t dateIndex = std::string::npos;
				if((dateIndex = formatCopy.find(base::consts::kDateTimeFormatSpecifier)) != std::string::npos)
				{
					while(dateIndex > 0 && formatCopy[dateIndex - 1] == base::consts::kFormatSpecifierChar)
					{
						dateIndex = formatCopy.find(base::consts::kDateTimeFormatSpecifier, dateIndex + 1);
					}
					if(dateIndex != std::string::npos)
					{
						addFlag(base::FormatFlags::DateTime);
						updateDateFormat(dateIndex, formatCopy);
					}
				}
				m_format = formatCopy;
				updateFormatSpec();
			}

			inline Level level(void) const
			{
				return m_level;
			}

			inline const base::type::string_t& userFormat(void) const
			{
				return m_userFormat;
			}

			inline const base::type::string_t& format(void) const
			{
				return m_format;
			}

			inline const std::string& dateTimeFormat(void) const
			{
				return m_dateTimeFormat;
			}

			inline base::type::EnumType flags(void) const
			{
				return m_flags;
			}

			inline bool hasFlag(base::FormatFlags flag) const
			{
				return base::utils::hasFlag(flag, m_flags);
			}

			virtual void log(el::base::type::ostream_t& os) const
			{
				os << m_format;
			}

		protected:
			/// @brief Updates date time format if available in currFormat.
			/// @param index Index where %datetime, %date or %time was found
			/// @param [in,out] currFormat current format that is being used to format
			virtual void updateDateFormat(std::size_t index, base::type::string_t& currFormat) ELPP_FINAL
			{
				if(hasFlag(base::FormatFlags::DateTime))
				{
					index += ELPP_STRLEN(base::consts::kDateTimeFormatSpecifier);
				}
				const base::type::char_t* ptr = currFormat.c_str() + index;
				if((currFormat.size() > index) && (ptr[0] == '{'))
				{
					// User has provided format for date/time
					++ptr;
					int count = 1;  // Start by 1 in order to remove starting brace
					std::stringstream ss;
					for(; *ptr; ++ptr, ++count)
					{
						if(*ptr == '}')
						{
							++count;  // In order to remove ending brace
							break;
						}
						ss << *ptr;
					}
					currFormat.erase(index, count);
					m_dateTimeFormat = ss.str();
				}
				else
				{
					// No format provided, use default
					if(hasFlag(base::FormatFlags::DateTime))
					{
						m_dateTimeFormat = std::string(base::consts::kDefaultDateTimeFormat);
					}
				}
			}

			/// @brief Updates %level from format. This is so that we dont have to do it at log-writing-time. It uses m_format and m_level
			virtual void updateFormatSpec(void) ELPP_FINAL
			{
				// Do not use switch over strongly typed enums because Intel C++ compilers dont support them yet.
				if(m_level == Level::Debug)
				{
					base::utils::Str::replaceFirstWithEscape(m_format, base::consts::kSeverityLevelFormatSpecifier,
							base::consts::kDebugLevelLogValue);
					base::utils::Str::replaceFirstWithEscape(m_format, base::consts::kSeverityLevelShortFormatSpecifier,
							base::consts::kDebugLevelShortLogValue);
				}
				else if(m_level == Level::Info)
				{
					base::utils::Str::replaceFirstWithEscape(m_format, base::consts::kSeverityLevelFormatSpecifier,
							base::consts::kInfoLevelLogValue);
					base::utils::Str::replaceFirstWithEscape(m_format, base::consts::kSeverityLevelShortFormatSpecifier,
							base::consts::kInfoLevelShortLogValue);
				}
				else if(m_level == Level::Warning)
				{
					base::utils::Str::replaceFirstWithEscape(m_format, base::consts::kSeverityLevelFormatSpecifier,
							base::consts::kWarningLevelLogValue);
					base::utils::Str::replaceFirstWithEscape(m_format, base::consts::kSeverityLevelShortFormatSpecifier,
							base::consts::kWarningLevelShortLogValue);
				}
				else if(m_level == Level::Error)
				{
					base::utils::Str::replaceFirstWithEscape(m_format, base::consts::kSeverityLevelFormatSpecifier,
							base::consts::kErrorLevelLogValue);
					base::utils::Str::replaceFirstWithEscape(m_format, base::consts::kSeverityLevelShortFormatSpecifier,
							base::consts::kErrorLevelShortLogValue);
				}
				else if(m_level == Level::Fatal)
				{
					base::utils::Str::replaceFirstWithEscape(m_format, base::consts::kSeverityLevelFormatSpecifier,
							base::consts::kFatalLevelLogValue);
					base::utils::Str::replaceFirstWithEscape(m_format, base::consts::kSeverityLevelShortFormatSpecifier,
							base::consts::kFatalLevelShortLogValue);
				}
				else if(m_level == Level::Verbose)
				{
					base::utils::Str::replaceFirstWithEscape(m_format, base::consts::kSeverityLevelFormatSpecifier,
							base::consts::kVerboseLevelLogValue);
					base::utils::Str::replaceFirstWithEscape(m_format, base::consts::kSeverityLevelShortFormatSpecifier,
							base::consts::kVerboseLevelShortLogValue);
				}
				else if(m_level == Level::Trace)
				{
					base::utils::Str::replaceFirstWithEscape(m_format, base::consts::kSeverityLevelFormatSpecifier,
							base::consts::kTraceLevelLogValue);
					base::utils::Str::replaceFirstWithEscape(m_format, base::consts::kSeverityLevelShortFormatSpecifier,
							base::consts::kTraceLevelShortLogValue);
				}
				if(hasFlag(base::FormatFlags::User))
				{
					std::string s = base::utils::s_currentUser;
					base::utils::Str::replaceFirstWithEscape(m_format, base::consts::kCurrentUserFormatSpecifier,
							base::utils::s_currentUser);
				}
				if(hasFlag(base::FormatFlags::Host))
				{
					base::utils::Str::replaceFirstWithEscape(m_format, base::consts::kCurrentHostFormatSpecifier,
							base::utils::s_currentHost);
				}
				// Ignore Level::Global and Level::Unknown
			}

			inline void addFlag(base::FormatFlags flag)
			{
				base::utils::addFlag(flag, &m_flags);
			}

		private:
			Level m_level;
			base::type::string_t m_userFormat;
			base::type::string_t m_format;
			std::string m_dateTimeFormat;
			base::type::EnumType m_flags;
			friend class el::Logger;  // To resolve loggerId format specifier easily
		};
	}  // namespace base
	/// @brief Resolving function for format specifier
	typedef std::function<const char* (void)> FormatSpecifierValueResolver;
	/// @brief User-provided custom format specifier
	/// @see el::Helpers::installCustomFormatSpecifier
	/// @see FormatSpecifierValueResolver
	class CustomFormatSpecifier
	{
	public:
		CustomFormatSpecifier(const char* formatSpecifier, const FormatSpecifierValueResolver& resolver) :
			m_formatSpecifier(formatSpecifier), m_resolver(resolver)
		{
		}
		inline const char* formatSpecifier(void) const
		{
			return m_formatSpecifier;
		}
		inline const FormatSpecifierValueResolver& resolver(void) const
		{
			return m_resolver;
		}
		inline bool operator==(const char* formatSpecifier)
		{
			return strcmp(m_formatSpecifier, formatSpecifier) == 0;
		}

	private:
		const char* m_formatSpecifier;
		FormatSpecifierValueResolver m_resolver;
	};
	/// @brief Represents single configuration that has representing level, configuration type and a string based value.
	///
	/// @detail String based value means any value either its boolean, integer or string itself, it will be embedded inside quotes
	/// and will be parsed later.
	///
	/// Consider some examples below:
	///   * el::Configuration confEnabledInfo(el::Level::Info, el::ConfigurationType::Enabled, "true");
	///   * el::Configuration confMaxLogFileSizeInfo(el::Level::Info, el::ConfigurationType::MaxLogFileSize, "2048");
	///   * el::Configuration confFilenameInfo(el::Level::Info, el::ConfigurationType::Filename, "/var/log/my.log");
	class Configuration : public Loggable
	{
	public:
		Configuration(const Configuration& c) :
			m_level(c.m_level),
			m_configurationType(c.m_configurationType),
			m_value(c.m_value)
		{
		}

		Configuration& operator=(const Configuration& c)
		{
			m_level = c.m_level;
			m_configurationType = c.m_configurationType;
			m_value = c.m_value;
			return *this;
		}

		virtual ~Configuration(void)
		{
		}

		/// @brief Full constructor used to sets value of configuration
		Configuration(Level level, ConfigurationType configurationType, const std::string& value) :
			m_level(level),
			m_configurationType(configurationType),
			m_value(value)
		{
		}

		/// @brief Gets level of current configuration
		inline Level level(void) const
		{
			return m_level;
		}

		/// @brief Gets configuration type of current configuration
		inline ConfigurationType configurationType(void) const
		{
			return m_configurationType;
		}

		/// @brief Gets string based configuration value
		inline const std::string& value(void) const
		{
			return m_value;
		}

		/// @brief Set string based configuration value
		/// @param value Value to set. Values have to be std::string; For boolean values use "true", "false", for any integral values
		///        use them in quotes. They will be parsed when configuring
		inline void setValue(const std::string& value)
		{
			m_value = value;
		}

		virtual inline void log(el::base::type::ostream_t& os) const
		{
			os << LevelHelper::convertToString(m_level)
				<< ELPP_LITERAL(" ") << ConfigurationTypeHelper::convertToString(m_configurationType)
				<< ELPP_LITERAL(" = ") << m_value.c_str();
		}

		/// @brief Used to find configuration from configuration (pointers) repository. Avoid using it.
		class Predicate
		{
		public:
			Predicate(Level level, ConfigurationType configurationType) :
				m_level(level),
				m_configurationType(configurationType)
			{
			}

			inline bool operator()(const Configuration* conf) const
			{
				return ((conf != nullptr) && (conf->level() == m_level) && (conf->configurationType() == m_configurationType));
			}

		private:
			Level m_level;
			ConfigurationType m_configurationType;
		};

	private:
		Level m_level;
		ConfigurationType m_configurationType;
		std::string m_value;
	};

	/// @brief Thread-safe Configuration repository
	///
	/// @detail This repository represents configurations for all the levels and configuration type mapped to a value.
	class Configurations : public base::utils::RegistryWithPred<Configuration, Configuration::Predicate>
	{
	public:
		/// @brief Default constructor with empty repository
		Configurations(void) :
			m_configurationFile(std::string()),
			m_isFromFile(false)
		{
		}

		/// @brief Constructor used to set configurations using configuration file.
		/// @param configurationFile Full path to configuration file
		/// @param useDefaultsForRemaining Lets you set the remaining configurations to default.
		/// @param base If provided, this configuration will be based off existing repository that this argument is pointing to.
		/// @see parseFromFile(const std::string&, Configurations* base)
		/// @see setRemainingToDefault()
		Configurations(const std::string& configurationFile, bool useDefaultsForRemaining = true, Configurations* base = nullptr) :
			m_configurationFile(configurationFile),
			m_isFromFile(false)
		{
			parseFromFile(configurationFile, base);
			if(useDefaultsForRemaining)
			{
				setRemainingToDefault();
			}
		}

		virtual ~Configurations(void)
		{
		}

		/// @brief Parses configuration from file.
		/// @param configurationFile Full path to configuration file
		/// @param base Configurations to base new configuration repository off. This value is used when you want to use
		///        existing Configurations to base all the values and then set rest of configuration via configuration file.
		/// @return True if successfully parsed, false otherwise. You may define 'ELPP_DEBUG_ASSERT_FAILURE' to make sure you
		///         do not proceed without successful parse.
		inline bool parseFromFile(const std::string& configurationFile, Configurations* base = nullptr)
		{
			// We initial assertion with true because if we have assertion diabled, we want to pass this
			// check and if assertion is enabled we will have values re-assigned any way.
			bool assertionPassed = true;
			ELPP_ASSERT((assertionPassed = base::utils::File::pathExists(configurationFile.c_str(), true)),
					"Configuration file [" << configurationFile << "] does not exist!");
			if(!assertionPassed)
			{
				return false;
			}
			bool success = Parser::parseFromFile(configurationFile, this, base);
			m_isFromFile = success;
			return success;
		}

		/// @brief Parse configurations from configuration string.
		///
		/// @detail This configuration string has same syntax as configuration file contents. Make sure all the necessary
		/// new line characters are provided.
		/// @param base Configurations to base new configuration repository off. This value is used when you want to use
		///        existing Configurations to base all the values and then set rest of configuration via configuration text.
		/// @return True if successfully parsed, false otherwise. You may define 'ELPP_DEBUG_ASSERT_FAILURE' to make sure you
		///         do not proceed without successful parse.
		inline bool parseFromText(const std::string& configurationsString, Configurations* base = nullptr)
		{
			bool success = Parser::parseFromText(configurationsString, this, base);
			if(success)
			{
				m_isFromFile = false;
			}
			return success;
		}

		/// @brief Sets configuration based-off an existing configurations.
		/// @param base Pointer to existing configurations.
		inline void setFromBase(Configurations* base)
		{
			if(base == nullptr || base == this)
			{
				return;
			}
			base::threading::ScopedLock scopedLock(base->lock());
			for(Configuration*& conf : base->list())
			{
				set(conf);
			}
		}

		/// @brief Determines whether or not specified configuration type exists in the repository.
		///
		/// @detail Returns as soon as first level is found.
		/// @param configurationType Type of configuration to check existence for.
		bool hasConfiguration(ConfigurationType configurationType)
		{
			base::type::EnumType lIndex = LevelHelper::kMinValid;
			bool result = false;
			LevelHelper::forEachLevel(&lIndex, [&](void) -> bool
			{
				if(hasConfiguration(LevelHelper::castFromInt(lIndex), configurationType))
				{
					result = true;
				}
				return result;
			});
			return result;
		}

		/// @brief Determines whether or not specified configuration type exists for specified level
		/// @param level Level to check
		/// @param configurationType Type of configuration to check existence for.
		inline bool hasConfiguration(Level level, ConfigurationType configurationType)
		{
			base::threading::ScopedLock scopedLock(lock());
#if ELPP_COMPILER_INTEL
			// We cant specify template types here, Intel C++ throws compilation error
			// "error: type name is not allowed"
			return RegistryWithPred::get(level, configurationType) != nullptr;
#else
			return RegistryWithPred<Configuration, Configuration::Predicate>::get(level, configurationType) != nullptr;
#endif  // ELPP_COMPILER_INTEL
		}

		/// @brief Sets value of configuration for specified level.
		///
		/// @detail Any existing configuration for specified level will be replaced. Also note that configuration types
		/// ConfigurationType::MillisecondsWidth and ConfigurationType::PerformanceTracking will be ignored if not set for
		/// Level::Global because these configurations are not dependant on level.
		/// @param level Level to set configuration for (el::Level).
		/// @param configurationType Type of configuration (el::ConfigurationType)
		/// @param value A string based value. Regardless of what the data type of configuration is, it will always be string
		/// from users' point of view. This is then parsed later to be used internally.
		/// @see Configuration::setValue(const std::string& value)
		/// @see el::Level
		/// @see el::ConfigurationType
		inline void set(Level level, ConfigurationType configurationType, const std::string& value)
		{
			base::threading::ScopedLock scopedLock(lock());
			unsafeSet(level, configurationType, value);  // This is not unsafe anymore as we have locked mutex
			if(level == Level::Global)
			{
				unsafeSetGlobally(configurationType, value, false);  // Again this is not unsafe either
			}
		}

		/// @brief Sets single configuration based on other single configuration.
		/// @see set(Level level, ConfigurationType configurationType, const std::string& value)
		inline void set(Configuration* conf)
		{
			if(conf == nullptr)
			{
				return;
			}
			set(conf->level(), conf->configurationType(), conf->value());
		}

		inline Configuration* get(Level level, ConfigurationType configurationType)
		{
			base::threading::ScopedLock scopedLock(lock());
			return RegistryWithPred<Configuration, Configuration::Predicate>::get(level, configurationType);
		}

		/// @brief Sets configuration for all levels.
		/// @param configurationType Type of configuration
		/// @param value String based value
		/// @see Configurations::set(Level level, ConfigurationType configurationType, const std::string& value)
		inline void setGlobally(ConfigurationType configurationType, const std::string& value)
		{
			setGlobally(configurationType, value, false);
		}

		/// @brief Clears repository so that all the configurations are unset
		inline void clear(void)
		{
			base::threading::ScopedLock scopedLock(lock());
			unregisterAll();
		}

		/// @brief Gets configuration file used in parsing this configurations.
		///
		/// @detail If this repository was set manually or by text this returns empty string.
		inline const std::string& configurationFile(void) const
		{
			return m_configurationFile;
		}

		/// @brief Sets configurations to "factory based" configurations.
		void setToDefault(void)
		{
			setGlobally(ConfigurationType::Enabled, std::string("true"), true);
#if !defined(ELPP_NO_DEFAULT_LOG_FILE)
			setGlobally(ConfigurationType::Filename, std::string(base::consts::kDefaultLogFile), true);
#else
			ELPP_UNUSED(base::consts::kDefaultLogFile);
#endif  // !defined(ELPP_NO_DEFAULT_LOG_FILE)
			setGlobally(ConfigurationType::ToFile, std::string("true"), true);
			setGlobally(ConfigurationType::ToStandardOutput, std::string("true"), true);
			setGlobally(ConfigurationType::MillisecondsWidth, std::string("3"), true);
			setGlobally(ConfigurationType::PerformanceTracking, std::string("true"), true);
			setGlobally(ConfigurationType::MaxLogFileSize, std::string("0"), true);
			setGlobally(ConfigurationType::LogFlushThreshold, std::string("0"), true);

			setGlobally(ConfigurationType::Format, std::string("%datetime %level [%logger] %msg"), true);
			set(Level::Debug, ConfigurationType::Format, std::string("%datetime %level [%logger] [%user@%host] [%func] [%loc] %msg"));
			// INFO and WARNING are set to default by Level::Global
			set(Level::Error, ConfigurationType::Format, std::string("%datetime %level [%logger] %msg"));
			set(Level::Fatal, ConfigurationType::Format, std::string("%datetime %level [%logger] %msg"));
			set(Level::Verbose, ConfigurationType::Format, std::string("%datetime %level-%vlevel [%logger] %msg"));
			set(Level::Trace, ConfigurationType::Format, std::string("%datetime %level [%logger] [%func] [%loc] %msg"));
		}

		/// @brief Lets you set the remaining configurations to default.
		///
		/// @detail By remaining, it means that the level/type a configuration does not exist for.
		/// This function is useful when you want to minimize chances of failures, e.g, if you have a configuration file that sets
		/// configuration for all the configurations except for Enabled or not, we use this so that ENABLED is set to default i.e,
		/// true. If you dont do this explicitley (either by calling this function or by using second param in Constructor
		/// and try to access a value, an error is thrown
		void setRemainingToDefault(void)
		{
			base::threading::ScopedLock scopedLock(lock());
			unsafeSetIfNotExist(Level::Global, ConfigurationType::Enabled, std::string("true"));
#if !defined(ELPP_NO_DEFAULT_LOG_FILE)
			unsafeSetIfNotExist(Level::Global, ConfigurationType::Filename, std::string(base::consts::kDefaultLogFile));
#endif  // !defined(ELPP_NO_DEFAULT_LOG_FILE)
			unsafeSetIfNotExist(Level::Global, ConfigurationType::ToFile, std::string("true"));
			unsafeSetIfNotExist(Level::Global, ConfigurationType::ToStandardOutput, std::string("true"));
			unsafeSetIfNotExist(Level::Global, ConfigurationType::MillisecondsWidth, std::string("3"));
			unsafeSetIfNotExist(Level::Global, ConfigurationType::PerformanceTracking, std::string("true"));
			unsafeSetIfNotExist(Level::Global, ConfigurationType::MaxLogFileSize, std::string("0"));
			unsafeSetIfNotExist(Level::Global, ConfigurationType::Format, std::string("%datetime %level [%logger] %msg"));
			unsafeSetIfNotExist(Level::Debug, ConfigurationType::Format,
				std::string("%datetime %level [%logger] [%user@%host] [%func] [%loc] %msg"));
			// INFO and WARNING are set to default by Level::Global
			unsafeSetIfNotExist(Level::Error, ConfigurationType::Format, std::string("%datetime %level [%logger] %msg"));
			unsafeSetIfNotExist(Level::Fatal, ConfigurationType::Format, std::string("%datetime %level [%logger] %msg"));
			unsafeSetIfNotExist(Level::Verbose, ConfigurationType::Format, std::string("%datetime %level-%vlevel [%logger] %msg"));
			unsafeSetIfNotExist(Level::Trace, ConfigurationType::Format, std::string("%datetime %level [%logger] [%func] [%loc] %msg"));
		}

		/// @brief Parser used internally to parse configurations from file or text.
		///
		/// @detail This class makes use of base::utils::Str.
		/// You should not need this unless you are working on some tool for Easylogging++
		class Parser : base::StaticClass
		{
		public:
			/// @brief Parses configuration from file.
			/// @param configurationFile Full path to configuration file
			/// @param sender Sender configurations pointer. Usually 'this' is used from calling class
			/// @param base Configurations to base new configuration repository off. This value is used when you want to use
			///        existing Configurations to base all the values and then set rest of configuration via configuration file.
			/// @return True if successfully parsed, false otherwise. You may define '_STOP_ON_FIRSTELPP_ASSERTION' to make sure you
			///         do not proceed without successful parse.
			static bool parseFromFile(const std::string& configurationFile, Configurations* sender, Configurations* base = nullptr)
			{
				sender->setFromBase(base);
				std::ifstream fileStream_(configurationFile.c_str(), std::ifstream::in);
				ELPP_ASSERT(fileStream_.is_open(), "Unable to open configuration file [" << configurationFile << "] for parsing.");
				bool parsedSuccessfully = false;
				std::string line = std::string();
				Level currLevel = Level::Unknown;
				std::string currConfigStr = std::string();
				std::string currLevelStr = std::string();
				while(fileStream_.good())
				{
					std::getline(fileStream_, line);
					parsedSuccessfully = parseLine(&line, &currConfigStr, &currLevelStr, &currLevel, sender);
					ELPP_ASSERT(parsedSuccessfully, "Unable to parse configuration line: " << line);
				}
				return parsedSuccessfully;
			}

			/// @brief Parse configurations from configuration string.
			///
			/// @detail This configuration string has same syntax as configuration file contents. Make sure all the necessary
			/// new line characters are provided. You may define '_STOP_ON_FIRSTELPP_ASSERTION' to make sure you
			/// do not proceed without successful parse (This is recommended)
			/// @param configurationsString
			/// @param sender Sender configurations pointer. Usually 'this' is used from calling class
			/// @param base Configurations to base new configuration repository off. This value is used when you want to use
			///        existing Configurations to base all the values and then set rest of configuration via configuration text.
			/// @return True if successfully parsed, false otherwise.
			static bool parseFromText(const std::string& configurationsString, Configurations* sender, Configurations* base = nullptr)
			{
				sender->setFromBase(base);
				bool parsedSuccessfully = false;
				std::stringstream ss(configurationsString);
				std::string line = std::string();
				Level currLevel = Level::Unknown;
				std::string currConfigStr = std::string();
				std::string currLevelStr = std::string();
				while(std::getline(ss, line))
				{
					parsedSuccessfully = parseLine(&line, &currConfigStr, &currLevelStr, &currLevel, sender);
					ELPP_ASSERT(parsedSuccessfully, "Unable to parse configuration line: " << line);
				}
				return parsedSuccessfully;
			}

		private:
			friend class el::Loggers;
			static void ignoreComments(std::string* line)
			{
				std::size_t foundAt = 0;
				std::size_t quotesStart = line->find("\"");
				std::size_t quotesEnd = std::string::npos;
				if(quotesStart != std::string::npos)
				{
					quotesEnd = line->find("\"", quotesStart + 1);
					while(quotesEnd != std::string::npos && line->at(quotesEnd - 1) == '\\')
					{
						// Do not erase slash yet - we will erase it in parseLine(..) while loop
						quotesEnd = line->find("\"", quotesEnd + 2);
					}
				}
				if((foundAt = line->find(base::consts::kConfigurationComment)) != std::string::npos)
				{
					if(foundAt < quotesEnd)
					{
						foundAt = line->find(base::consts::kConfigurationComment, quotesEnd + 1);
					}
					*line = line->substr(0, foundAt);
				}
			}
			static inline bool isLevel(const std::string& line)
			{
				return base::utils::Str::startsWith(line, std::string(base::consts::kConfigurationLevel));
			}

			static inline bool isComment(const std::string& line)
			{
				return base::utils::Str::startsWith(line, std::string(base::consts::kConfigurationComment));
			}

			static inline bool isConfig(const std::string& line)
			{
				std::size_t assignment = line.find('=');
				return line != "" &&
					(line[0] >= 65 || line[0] <= 90 || line[0] >= 97 || line[0] <= 122) &&
					(assignment != std::string::npos) &&
					(line.size() > assignment);
			}

			static bool parseLine(std::string* line, std::string* currConfigStr, std::string* currLevelStr, Level* currLevel, Configurations* conf)
			{
				ConfigurationType currConfig = ConfigurationType::Unknown;
				std::string currValue = std::string();
				*line = base::utils::Str::trim(*line);
				if(isComment(*line)) return true;
				ignoreComments(line);
				*line = base::utils::Str::trim(*line);
				if(line->empty())
				{
					// Comment ignored
					return true;
				}
				if(isLevel(*line))
				{
					if(line->size() <= 2)
					{
						return true;
					}
					*currLevelStr = line->substr(1, line->size() - 2);
					*currLevelStr = base::utils::Str::toUpper(*currLevelStr);
					*currLevelStr = base::utils::Str::trim(*currLevelStr);
					*currLevel = LevelHelper::convertFromString(currLevelStr->c_str());
					return true;
				}
				if(isConfig(*line))
				{
					std::size_t assignment = line->find('=');
					*currConfigStr = line->substr(0, assignment);
					*currConfigStr = base::utils::Str::toUpper(*currConfigStr);
					*currConfigStr = base::utils::Str::trim(*currConfigStr);
					currConfig = ConfigurationTypeHelper::convertFromString(currConfigStr->c_str());
					currValue = line->substr(assignment + 1);
					currValue = base::utils::Str::trim(currValue);
					std::size_t quotesStart = currValue.find("\"", 0);
					std::size_t quotesEnd = std::string::npos;
					if(quotesStart != std::string::npos)
					{
						quotesEnd = currValue.find("\"", quotesStart + 1);
						while(quotesEnd != std::string::npos && currValue.at(quotesEnd - 1) == '\\')
						{
							currValue = currValue.erase(quotesEnd - 1, 1);
							quotesEnd = currValue.find("\"", quotesEnd + 2);
						}
					}
					if(quotesStart != std::string::npos && quotesEnd != std::string::npos)
					{
						// Quote provided - check and strip if valid
						ELPP_ASSERT((quotesStart < quotesEnd), "Configuration error - No ending quote found in ["
							<< currConfigStr << "]");
						ELPP_ASSERT((quotesStart + 1 != quotesEnd), "Empty configuration value for [" << currConfigStr << "]");
						if((quotesStart != quotesEnd) && (quotesStart + 1 != quotesEnd))
						{
							// Explicit check in case if assertion is disabled
							currValue = currValue.substr(quotesStart + 1, quotesEnd - 1);
						}
					}
				}
				ELPP_ASSERT(*currLevel != Level::Unknown, "Unrecognized severity level [" << *currLevelStr << "]");
				ELPP_ASSERT(currConfig != ConfigurationType::Unknown, "Unrecognized configuration [" << *currConfigStr << "]");
				if(*currLevel == Level::Unknown || currConfig == ConfigurationType::Unknown)
				{
					return false;  // unrecognizable level or config
				}
				conf->set(*currLevel, currConfig, currValue);
				return true;
			}
		};

	private:
		std::string m_configurationFile;
		bool m_isFromFile;
		friend class el::Loggers;

		/// @brief Unsafely sets configuration if does not already exist
		void unsafeSetIfNotExist(Level level, ConfigurationType configurationType, const std::string& value)
		{
			Configuration* conf = RegistryWithPred<Configuration, Configuration::Predicate>::get(level, configurationType);
			if(conf == nullptr)
			{
				unsafeSet(level, configurationType, value);
			}
		}

		/// @brief Thread unsafe set
		void unsafeSet(Level level, ConfigurationType configurationType, const std::string& value)
		{
			Configuration* conf = RegistryWithPred<Configuration, Configuration::Predicate>::get(level, configurationType);
			if(conf == nullptr)
			{
				registerNew(new Configuration(level, configurationType, value));
			}
			else
			{
				conf->setValue(value);
			}
			if(level == Level::Global)
			{
				unsafeSetGlobally(configurationType, value, false);
			}
		}

		/// @brief Sets configurations for all levels including Level::Global if includeGlobalLevel is true
		/// @see Configurations::setGlobally(ConfigurationType configurationType, const std::string& value)
		void setGlobally(ConfigurationType configurationType, const std::string& value, bool includeGlobalLevel)
		{
			if(includeGlobalLevel)
			{
				set(Level::Global, configurationType, value);
			}
			base::type::EnumType lIndex = LevelHelper::kMinValid;
			LevelHelper::forEachLevel(&lIndex, [&](void) -> bool
			{
				set(LevelHelper::castFromInt(lIndex), configurationType, value);
				return false;  // Do not break lambda function yet as we need to set all levels regardless
			});
		}

		/// @brief Sets configurations (Unsafely) for all levels including Level::Global if includeGlobalLevel is true
		/// @see Configurations::setGlobally(ConfigurationType configurationType, const std::string& value)
		void unsafeSetGlobally(ConfigurationType configurationType, const std::string& value, bool includeGlobalLevel)
		{
			if(includeGlobalLevel)
			{
				unsafeSet(Level::Global, configurationType, value);
			}
			base::type::EnumType lIndex = LevelHelper::kMinValid;
			LevelHelper::forEachLevel(&lIndex, [&](void) -> bool
			{
				unsafeSet(LevelHelper::castFromInt(lIndex), configurationType, value);
				return false;  // Do not break lambda function yet as we need to set all levels regardless
			});
		}
	};

	namespace base {
		typedef std::shared_ptr<base::type::fstream_t> FileStreamPtr;
		typedef std::map<std::string, FileStreamPtr> LogStreamsReferenceMap;
		/// @brief Configurations with data types.
		///
		/// @detail el::Configurations have string based values. This is whats used internally in order to read correct configurations.
		/// This is to perform faster while writing logs using correct configurations.
		///
		/// This is thread safe and final class containing non-virtual destructor (means nothing should inherit this class)
		class TypedConfigurations : public base::threading::ThreadSafe
		{
		public:
			/// @brief Constructor to initialize (construct) the object off el::Configurations
			/// @param configurations Configurations pointer/reference to base this typed configurations off.
			/// @param logStreamsReference Use ELPP->registeredLoggers()->logStreamsReference()
			TypedConfigurations(Configurations* configurations, base::LogStreamsReferenceMap* logStreamsReference)
			{
				m_configurations = configurations;
				m_logStreamsReference = logStreamsReference;
				build(m_configurations);
			}

			TypedConfigurations(const TypedConfigurations& other)
			{
				this->m_configurations = other.m_configurations;
				this->m_logStreamsReference = other.m_logStreamsReference;
				build(m_configurations);
			}

			virtual ~TypedConfigurations(void)
			{
			}

			const Configurations* configurations(void) const
			{
				return m_configurations;
			}

			inline bool enabled(Level level)
			{
				return getConfigByVal<bool>(level, &m_enabledMap, "enabled");
			}

			inline bool toFile(Level level)
			{
				return getConfigByVal<bool>(level, &m_toFileMap, "toFile");
			}

			inline const std::string& filename(Level level)
			{
				return getConfigByRef<std::string>(level, &m_filenameMap, "filename");
			}

			inline bool toStandardOutput(Level level)
			{
				return getConfigByVal<bool>(level, &m_toStandardOutputMap, "toStandardOutput");
			}

			inline const base::LogFormat& logFormat(Level level)
			{
				return getConfigByRef<base::LogFormat>(level, &m_logFormatMap, "logFormat");
			}

			inline const base::MillisecondsWidth& millisecondsWidth(Level level = Level::Global)
			{
				return getConfigByRef<base::MillisecondsWidth>(level, &m_millisecondsWidthMap, "millisecondsWidth");
			}

			inline bool performanceTracking(Level level = Level::Global)
			{
				return getConfigByVal<bool>(level, &m_performanceTrackingMap, "performanceTracking");
			}

			inline base::type::fstream_t* fileStream(Level level)
			{
				return getConfigByRef<base::FileStreamPtr>(level, &m_fileStreamMap, "fileStream").get();
			}

			inline std::size_t maxLogFileSize(Level level)
			{
				return getConfigByVal<std::size_t>(level, &m_maxLogFileSizeMap, "maxLogFileSize");
			}

			inline std::size_t logFlushThreshold(Level level)
			{
				return getConfigByVal<std::size_t>(level, &m_logFlushThresholdMap, "logFlushThreshold");
			}

		private:
			Configurations* m_configurations;
			std::map<Level, bool> m_enabledMap;
			std::map<Level, bool> m_toFileMap;
			std::map<Level, std::string> m_filenameMap;
			std::map<Level, bool> m_toStandardOutputMap;
			std::map<Level, base::LogFormat> m_logFormatMap;
			std::map<Level, base::MillisecondsWidth> m_millisecondsWidthMap;
			std::map<Level, bool> m_performanceTrackingMap;
			std::map<Level, base::FileStreamPtr> m_fileStreamMap;
			std::map<Level, std::size_t> m_maxLogFileSizeMap;
			std::map<Level, std::size_t> m_logFlushThresholdMap;
			base::LogStreamsReferenceMap* m_logStreamsReference;
			std::map<Level, std::string> m_fileFullnameMap; // add to record file base name in config
			std::map<Level, std::size_t> m_fileLastTimeMap; // add to record last time, for changing file name

			friend class el::Helpers;
			friend class el::base::MessageBuilder;
			friend class el::base::Writer;
			friend class el::base::DefaultLogDispatchCallback;
			friend class el::base::LogDispatcher;

			template <typename Conf_T>
			inline Conf_T getConfigByVal(Level level, const std::map<Level, Conf_T>* confMap, const char* confName)
			{
				base::threading::ScopedLock scopedLock(lock());
				return unsafeGetConfigByVal(level, confMap, confName);  // This is not unsafe anymore - mutex locked in scope
			}

			template <typename Conf_T>
			inline Conf_T& getConfigByRef(Level level, std::map<Level, Conf_T>* confMap, const char* confName)
			{
				base::threading::ScopedLock scopedLock(lock());
				return unsafeGetConfigByRef(level, confMap, confName);  // This is not unsafe anymore - mutex locked in scope
			}

			template <typename Conf_T>
			inline Conf_T unsafeGetConfigByVal(Level level, const std::map<Level, Conf_T>* confMap, const char* confName)
			{
				ELPP_UNUSED(confName);
				typename std::map<Level, Conf_T>::const_iterator it = confMap->find(level);
				if(it == confMap->end())
				{
					try
					{
						return confMap->at(Level::Global);
					}
					catch(...)
					{
						ELPP_INTERNAL_ERROR("Unable to get configuration [" << confName << "] for level ["
							<< LevelHelper::convertToString(level) << "]"
								<< std::endl << "Please ensure you have properly configured logger.", false);
						return Conf_T();
					}
				}
				return it->second;
			}

			template <typename Conf_T>
			inline Conf_T& unsafeGetConfigByRef(Level level, std::map<Level, Conf_T>* confMap, const char* confName)
			{
				ELPP_UNUSED(confName);
				typename std::map<Level, Conf_T>::iterator it = confMap->find(level);
				if(it == confMap->end())
				{
					try
					{
						return confMap->at(Level::Global);
					}
					catch(...)
					{
						ELPP_INTERNAL_ERROR("Unable to get configuration [" << confName << "] for level ["
							<< LevelHelper::convertToString(level) << "]"
								<< std::endl << "Please ensure you have properly configured logger.", false);
					}
				}
				return it->second;
			}

			template <typename Conf_T>
			void setValue(Level level, const Conf_T& value, std::map<Level, Conf_T>* confMap, bool includeGlobalLevel = true)
			{
				// If map is empty and we are allowed to add into generic level (Level::Global), do it!
				if(confMap->empty() && includeGlobalLevel)
				{
					confMap->insert(std::make_pair(Level::Global, value));
					return;
				}
				// If same value exist in generic level already, dont add it to explicit level
				typename std::map<Level, Conf_T>::iterator it = confMap->find(Level::Global);
				if(it != confMap->end() && it->second == value)
				{
					return;
				}
				// Now make sure we dont double up values if we really need to add it to explicit level
				it = confMap->find(level);
				if(it == confMap->end())
				{
					// Value not found for level, add new
					confMap->insert(std::make_pair(level, value));
				}
				else
				{
					// Value found, just update value
					confMap->at(level) = value;
				}
			}

			void build(Configurations* configurations)
			{
				base::threading::ScopedLock scopedLock(lock());
				auto getBool = [](std::string boolStr) -> bool
				{  // Pass by value for trimming
					base::utils::Str::trim(boolStr);
					return (boolStr == "TRUE" || boolStr == "true" || boolStr == "1");
				};
				std::vector<Configuration*> withFileSizeLimit;
				for(Configurations::const_iterator it = configurations->begin(); it != configurations->end(); ++it)
				{
					Configuration* conf = *it;
					// We cannot use switch on strong enums because Intel C++ dont support them yet
					if(conf->configurationType() == ConfigurationType::Enabled)
					{
						setValue(conf->level(), getBool(conf->value()), &m_enabledMap);
					}
					else if(conf->configurationType() == ConfigurationType::ToFile)
					{
						setValue(conf->level(), getBool(conf->value()), &m_toFileMap);
					}
					else if(conf->configurationType() == ConfigurationType::ToStandardOutput)
					{
						setValue(conf->level(), getBool(conf->value()), &m_toStandardOutputMap);
					}
					else if(conf->configurationType() == ConfigurationType::Filename)
					{
						// We do not yet configure filename but we will configure in another
						// loop. This is because if file cannot be created, we will force ToFile
						// to be false. Because configuring logger is not necessarily performance
						// sensative operation, we can live with another loop; (by the way this loop
						// is not very heavy either)
					}
					else if(conf->configurationType() == ConfigurationType::Format)
					{
						setValue(conf->level(), base::LogFormat(conf->level(),
								 base::type::string_t(conf->value().begin(), conf->value().end())), &m_logFormatMap);
					}
					else if(conf->configurationType() == ConfigurationType::MillisecondsWidth)
					{
						setValue(Level::Global,
							base::MillisecondsWidth(static_cast<int>(getULong(conf->value()))), &m_millisecondsWidthMap);
					}
					else if(conf->configurationType() == ConfigurationType::PerformanceTracking)
					{
						setValue(Level::Global, getBool(conf->value()), &m_performanceTrackingMap);
					}
					else if(conf->configurationType() == ConfigurationType::MaxLogFileSize)
					{
						setValue(conf->level(), static_cast<std::size_t>(getULong(conf->value())), &m_maxLogFileSizeMap);
#if !defined(ELPP_NO_DEFAULT_LOG_FILE)
						withFileSizeLimit.push_back(conf);
#endif  // !defined(ELPP_NO_DEFAULT_LOG_FILE)
					}
					else if(conf->configurationType() == ConfigurationType::LogFlushThreshold)
					{
						setValue(conf->level(), static_cast<std::size_t>(getULong(conf->value())), &m_logFlushThresholdMap);
					}
				}
				// As mentioned early, we will now set filename configuration in separate loop to deal with non-existent files
				for(Configurations::const_iterator it = configurations->begin(); it != configurations->end(); ++it)
				{
					Configuration* conf = *it;
					if(conf->configurationType() == ConfigurationType::Filename)
					{
						insertFile(conf->level(), conf->value());
					}
				}
				for(std::vector<Configuration*>::iterator conf = withFileSizeLimit.begin();
						conf != withFileSizeLimit.end(); ++conf)
				{
					// This is not unsafe as mutex is locked in currect scope
					unsafeValidateFileRolling((*conf)->level(), base::defaultPreRollOutCallback);
				}
			}

			unsigned long getULong(std::string confVal)
			{
				bool valid = true;
				base::utils::Str::trim(confVal);
				valid = !confVal.empty() && std::find_if(confVal.begin(), confVal.end(),
						[](char c)
				{
					return !base::utils::Str::isDigit(c);
				}) == confVal.end();
				if(!valid)
				{
					valid = false;
					ELPP_ASSERT(valid, "Configuration value not a valid integer [" << confVal << "]");
					return 0;
				}
				return atol(confVal.c_str());
			}

			std::string resolveFilename(const std::string& filename)
			{
				std::string resultingFilename = filename;
				std::size_t dateIndex = std::string::npos;
				std::string dateTimeFormatSpecifierStr = std::string(base::consts::kDateTimeFormatSpecifierForFilename);
				if((dateIndex = resultingFilename.find(dateTimeFormatSpecifierStr.c_str())) != std::string::npos)
				{
					while(dateIndex > 0 && resultingFilename[dateIndex - 1] == base::consts::kFormatSpecifierChar)
					{
						dateIndex = resultingFilename.find(dateTimeFormatSpecifierStr.c_str(), dateIndex + 1);
					}
					if(dateIndex != std::string::npos)
					{
						const char* ptr = resultingFilename.c_str() + dateIndex;
						// Goto end of specifier
						ptr += dateTimeFormatSpecifierStr.size();
						std::string fmt;
						if((resultingFilename.size() > dateIndex) && (ptr[0] == '{'))
						{
							// User has provided format for date/time
							++ptr;
							int count = 1;  // Start by 1 in order to remove starting brace
							std::stringstream ss;
							for(; *ptr; ++ptr, ++count)
							{
								if(*ptr == '}')
								{
									++count;  // In order to remove ending brace
									break;
								}
								ss << *ptr;
							}
							resultingFilename.erase(dateIndex + dateTimeFormatSpecifierStr.size(), count);
							fmt = ss.str();
						}
						else
						{
							fmt = std::string(base::consts::kDefaultDateTimeFormatInFilename);
						}
						base::MillisecondsWidth msWidth(3);
						std::string now = base::utils::DateTime::getDateTime(fmt.c_str(), &msWidth);
						base::utils::Str::replaceAll(now, '/', '-'); // Replace path element since we are dealing with filename
						base::utils::Str::replaceAll(resultingFilename, dateTimeFormatSpecifierStr, now);
					}
				}
				/////////add for same direct oneday/////////////////////
				base::MillisecondsWidth msWidth(3);
				std::string now = base::utils::DateTime::getDateTime("%Y%M%d_%H%m%s", &msWidth);
				base::utils::Str::replaceAll(now, '/', '-');
				base::utils::Str::replaceAll(resultingFilename, "filename{%Y%M%d_%H%m%s}", now);
				/////////////////////////////// ///////////////////////
				return resultingFilename;
			}

			void insertFile(Level level, const std::string& fullFilename)
			{
				std::string resolvedFilename = resolveFilename(fullFilename);
				if(resolvedFilename.empty())
				{
					std::cerr << "Could not load empty file for logging, please re-check your configurations for level ["
						<< LevelHelper::convertToString(level) << "]";
				}
				std::string filePath = base::utils::File::extractPathFromFilename(resolvedFilename, base::consts::kFilePathSeperator);
				if(filePath.size() < resolvedFilename.size())
				{
					base::utils::File::createPath(filePath);
				}
				auto create = [&](Level level)
				{
					base::LogStreamsReferenceMap::iterator filestreamIter = m_logStreamsReference->find(resolvedFilename);
					base::type::fstream_t* fs = nullptr;
					if(filestreamIter == m_logStreamsReference->end())
					{
						// We need a completely new stream, nothing to share with
						fs = base::utils::File::newFileStream(resolvedFilename);
						m_filenameMap.insert(std::make_pair(level, resolvedFilename));
						m_fileStreamMap.insert(std::make_pair(level, base::FileStreamPtr(fs)));
						m_logStreamsReference->insert(std::make_pair(resolvedFilename, base::FileStreamPtr(m_fileStreamMap.at(level))));
					}
					else
					{
						// Woops! we have an existing one, share it!
						m_filenameMap.insert(std::make_pair(level, filestreamIter->first));
						m_fileStreamMap.insert(std::make_pair(level, base::FileStreamPtr(filestreamIter->second)));
						fs = filestreamIter->second.get();
					}
					if(fs == nullptr)
					{
						// We display bad file error from newFileStream()
						ELPP_INTERNAL_ERROR("Setting [TO_FILE] of ["
							<< LevelHelper::convertToString(level) << "] to FALSE", false);
						setValue(level, false, &m_toFileMap);
					}
				};
				// If we dont have file conf for any level, create it for Level::Global first
				// otherwise create for specified level
				create(m_filenameMap.empty() && m_fileStreamMap.empty() ? Level::Global : level);

				struct ::tm timeinfo = base::utils::DateTime::getCurrentTm();
				m_fileFullnameMap[level] = fullFilename;
				m_fileLastTimeMap[level] = timeinfo.tm_hour;
			}

			bool unsafeValidateFileRolling(Level level, const PreRollOutCallback& PreRollOutCallback)
			{
				base::type::fstream_t* fs = unsafeGetConfigByRef(level, &m_fileStreamMap, "fileStream").get();
				if(fs == nullptr)
				{
					return true;
				}
				std::size_t maxLogFileSize = unsafeGetConfigByVal(level, &m_maxLogFileSizeMap, "maxLogFileSize");
				/*std::size_t*/ int64_t currFileSize = base::utils::File::getSizeOfFile(fs);
				if(maxLogFileSize != 0 && currFileSize >= (int64_t)maxLogFileSize)
				{
					std::string fname = unsafeGetConfigByRef(level, &m_filenameMap, "filename");
					ELPP_INTERNAL_INFO(1, "Truncating log file [" << fname << "] as a result of configurations for level ["
							<< LevelHelper::convertToString(level) << "]");
					fs->close();
					PreRollOutCallback(fname.c_str(), currFileSize);
					fs->open(fname, std::fstream::out | std::fstream::trunc);
					return true;
				}

				struct ::tm timeinfo = base::utils::DateTime::getCurrentTm();
				std::size_t lastRollingHour = unsafeGetConfigByRef(level, &m_fileLastTimeMap, "lastRollingTime");
				if(lastRollingHour != (std::size_t)timeinfo.tm_hour)
				{
					////std::string fname = unsafeGetConfigByRef(level, &m_filenameMap, "filename");
					////fs->close();
					////std::string& fullFileName = unsafeGetConfigByRef(level, &m_fileFullnameMap, "fileFullName");
					////std::string resolvedFilename = resolveFilename(fullFileName);
					////if (resolvedFilename.empty()) {
					////    std::cerr << "Could not load empty file for logging, please re-check your configurations for level ["
					////        << LevelHelper::convertToString(level) << "]";
					////    return false;
					////}

					////m_filenameMap[level] = resolvedFilename;
					////fs->open(fname, std::fstream::out | std::fstream::trunc);
					////return true;

					std::string fname = unsafeGetConfigByRef(level, &m_filenameMap, "filename");
					fs->close();
					//base::utils::safeDelete(fs);
					m_fileStreamMap.erase(level);
					m_filenameMap.erase(level);
					m_logStreamsReference->erase(fname);
					//PreRollOutCallback(fname.c_str(), currFileSize);
					std::string& fileFullname = unsafeGetConfigByRef(level, &m_fileFullnameMap, "fileFullName");
					insertFile(level, fileFullname);
					return true;

					//// check
					//fname = unsafeGetConfigByRef(level, &m_filenameMap, "filename");
					//base::type::fstream_t* new_fs = unsafeGetConfigByRef(level, &m_fileStreamMap, "fileStream").get();
					//if (new_fs == nullptr) {
					//    return true;
					//}

					//if (new_fs->is_open())
					//{
					//    // just check
					//    return true;
					//}

					//new_fs->open(fname, std::fstream::out | std::fstream::trunc);
					//return true;
				}

				return false;
			}

			bool validateFileRolling(Level level, const PreRollOutCallback& PreRollOutCallback)
			{
				base::threading::ScopedLock scopedLock(lock());
				return unsafeValidateFileRolling(level, PreRollOutCallback);
			}
		};
		/// @brief Class that keeps record of current line hit for occasional logging
		class HitCounter
		{
		public:
			HitCounter(void) :
				m_filename(""),
				m_lineNumber(0),
				m_hitCounts(0)
			{
			}

			HitCounter(const char* filename, unsigned long int lineNumber) :
				m_filename(filename),
				m_lineNumber(lineNumber),
				m_hitCounts(0)
			{
			}

			HitCounter(const HitCounter& hitCounter) :
				m_filename(hitCounter.m_filename),
				m_lineNumber(hitCounter.m_lineNumber),
				m_hitCounts(hitCounter.m_hitCounts)
			{
			}

			HitCounter& operator=(const HitCounter& hitCounter)
			{
				m_filename = hitCounter.m_filename;
				m_lineNumber = hitCounter.m_lineNumber;
				m_hitCounts = hitCounter.m_hitCounts;
				return *this;
			}

			virtual ~HitCounter(void)
			{
			}

			/// @brief Resets location of current hit counter
			inline void resetLocation(const char* filename, unsigned long int lineNumber)
			{
				m_filename = filename;
				m_lineNumber = lineNumber;
			}

			/// @brief Validates hit counts and resets it if necessary
			inline void validateHitCounts(std::size_t n)
			{
				if(m_hitCounts >= base::consts::kMaxLogPerCounter)
				{
					m_hitCounts = (n >= 1 ? base::consts::kMaxLogPerCounter % n : 0);
				}
				++m_hitCounts;
			}

			inline const char* filename(void) const
			{
				return m_filename;
			}

			inline unsigned long int lineNumber(void) const
			{
				return m_lineNumber;
			}

			inline std::size_t hitCounts(void) const
			{
				return m_hitCounts;
			}

			inline void increment(void)
			{
				++m_hitCounts;
			}

			class Predicate
			{
			public:
				Predicate(const char* filename, unsigned long int lineNumber)
					: m_filename(filename),
					m_lineNumber(lineNumber)
				{
				}
				inline bool operator()(const HitCounter* counter)
				{
					return ((counter != nullptr) &&
							(strcmp(counter->m_filename, m_filename) == 0) &&
							(counter->m_lineNumber == m_lineNumber));
				}

			private:
				const char* m_filename;
				unsigned long int m_lineNumber;
			};

		private:
			const char* m_filename;
			unsigned long int m_lineNumber;
			std::size_t m_hitCounts;
		};
		/// @brief Repository for hit counters used across the application
		class RegisteredHitCounters : public base::utils::RegistryWithPred<base::HitCounter, base::HitCounter::Predicate>
		{
		public:
			/// @brief Validates counter for every N, i.e, registers new if does not exist otherwise updates original one
			/// @return True if validation resulted in triggering hit. Meaning logs should be written everytime true is returned
			bool validateEveryN(const char* filename, unsigned long int lineNumber, std::size_t n)
			{
				base::threading::ScopedLock scopedLock(lock());
				base::HitCounter* counter = get(filename, lineNumber);
				if(counter == nullptr)
				{
					registerNew(counter = new base::HitCounter(filename, lineNumber));
				}
				counter->validateHitCounts(n);
				bool result = (n >= 1 && counter->hitCounts() != 0 && counter->hitCounts() % n == 0);
				return result;
			}

			/// @brief Validates counter for hits >= N, i.e, registers new if does not exist otherwise updates original one
			/// @return True if validation resulted in triggering hit. Meaning logs should be written everytime true is returned
			bool validateAfterN(const char* filename, unsigned long int lineNumber, std::size_t n)
			{
				base::threading::ScopedLock scopedLock(lock());
				base::HitCounter* counter = get(filename, lineNumber);
				if(counter == nullptr)
				{
					registerNew(counter = new base::HitCounter(filename, lineNumber));
				}
				// Do not use validateHitCounts here since we do not want to reset counter here
				// Note the >= instead of > because we are incrementing
				// after this check
				if(counter->hitCounts() >= n)
					return true;
				counter->increment();
				return false;
			}

			/// @brief Validates counter for hits are <= n, i.e, registers new if does not exist otherwise updates original one
			/// @return True if validation resulted in triggering hit. Meaning logs should be written everytime true is returned
			bool validateNTimes(const char* filename, unsigned long int lineNumber, std::size_t n)
			{
				base::threading::ScopedLock scopedLock(lock());
				base::HitCounter* counter = get(filename, lineNumber);
				if(counter == nullptr)
				{
					registerNew(counter = new base::HitCounter(filename, lineNumber));
				}
				counter->increment();
				// Do not use validateHitCounts here since we do not want to reset counter here
				if(counter->hitCounts() <= n)
					return true;
				return false;
			}

			/// @brief Gets hit counter registered at specified position
			inline const base::HitCounter* getCounter(const char* filename, unsigned long int lineNumber)
			{
				base::threading::ScopedLock scopedLock(lock());
				return get(filename, lineNumber);
			}
		};
		/// @brief Action to be taken for dispatching
		enum class DispatchAction : base::type::EnumType
		{
			None = 1, NormalLog = 2, SysLog = 4
		};
	}  // namespace base
	template <typename T>
	class Callback : protected base::threading::ThreadSafe
	{
	public:
		Callback(void) : m_enabled(true)
		{
		}
		inline bool enabled(void) const
		{
			return m_enabled;
		}
		inline void setEnabled(bool enabled)
		{
			base::threading::ScopedLock scopedLock(lock());
			m_enabled = enabled;
		}
	protected:
		virtual void handle(const T* handlePtr) = 0;
	private:
		bool m_enabled;
	};
	class LogDispatchData
	{
	public:
		LogDispatchData() : m_logMessage(nullptr), m_dispatchAction(base::DispatchAction::None)
		{
		}
		inline const LogMessage* logMessage(void) const
		{
			return m_logMessage;
		}
		inline base::DispatchAction dispatchAction(void) const
		{
			return m_dispatchAction;
		}
	private:
		LogMessage* m_logMessage;
		base::DispatchAction m_dispatchAction;
		friend class base::LogDispatcher;

		inline void setLogMessage(LogMessage* logMessage)
		{
			m_logMessage = logMessage;
		}
		inline void setDispatchAction(base::DispatchAction dispatchAction)
		{
			m_dispatchAction = dispatchAction;
		}
	};
	class LogDispatchCallback : public Callback<LogDispatchData>
	{
	private:
		friend class base::LogDispatcher;
	};
	class PerformanceTrackingCallback : public Callback<PerformanceTrackingData>
	{
	private:
		friend class base::PerformanceTracker;
	};
	class LogBuilder : base::NoCopy
	{
	public:
		virtual ~LogBuilder(void)
		{
			ELPP_INTERNAL_INFO(3, "Destroying log builder...")
		}
		virtual base::type::string_t build(const LogMessage* logMessage, bool appendNewLine) const = 0;
		void convertToColoredOutput(base::type::string_t* logLine, Level level)
		{
			if(!base::utils::s_termSupportsColor) return;
			const base::type::char_t* resetColor = ELPP_LITERAL("\x1b[0m");
			if(level == Level::Error || level == Level::Fatal)
				*logLine = ELPP_LITERAL("\x1b[31m") + *logLine + resetColor;
			else if(level == Level::Warning)
				*logLine = ELPP_LITERAL("\x1b[33m") + *logLine + resetColor;
		}
	private:
		friend class el::base::DefaultLogDispatchCallback;
	};
	typedef std::shared_ptr<LogBuilder> LogBuilderPtr;
	/// @brief Represents a logger holding ID and configurations we need to write logs
	///
	/// @detail This class does not write logs itself instead its used by writer to read configuations from.
	class Logger : public base::threading::ThreadSafe, public Loggable
	{
	public:
		Logger(const std::string& id, base::LogStreamsReferenceMap* logStreamsReference) :
			m_id(id),
			m_typedConfigurations(nullptr),
			m_parentApplicationName(std::string()),
			m_isConfigured(false),
			m_logStreamsReference(logStreamsReference)
		{
			initUnflushedCount();
		}

		Logger(const std::string& id, const Configurations& configurations, base::LogStreamsReferenceMap* logStreamsReference) :
			m_id(id),
			m_typedConfigurations(nullptr),
			m_parentApplicationName(std::string()),
			m_isConfigured(false),
			m_logStreamsReference(logStreamsReference)
		{
			initUnflushedCount();
			configure(configurations);
		}

		Logger(const Logger& logger)
		{
			base::utils::safeDelete(m_typedConfigurations);
			m_id = logger.m_id;
			m_typedConfigurations = logger.m_typedConfigurations;
			m_parentApplicationName = logger.m_parentApplicationName;
			m_isConfigured = logger.m_isConfigured;
			m_configurations = logger.m_configurations;
			m_unflushedCount = logger.m_unflushedCount;
			m_logStreamsReference = logger.m_logStreamsReference;
		}

		Logger& operator=(const Logger& logger)
		{
			base::utils::safeDelete(m_typedConfigurations);
			m_id = logger.m_id;
			m_typedConfigurations = logger.m_typedConfigurations;
			m_parentApplicationName = logger.m_parentApplicationName;
			m_isConfigured = logger.m_isConfigured;
			m_configurations = logger.m_configurations;
			m_unflushedCount = logger.m_unflushedCount;
			m_logStreamsReference = logger.m_logStreamsReference;
			return *this;
		}

		virtual ~Logger(void)
		{
			base::utils::safeDelete(m_typedConfigurations);
		}

		virtual inline void log(el::base::type::ostream_t& os) const
		{
			os << m_id.c_str();
		}

		/// @brief Configures the logger using specified configurations.
		void configure(const Configurations& configurations)
		{
			m_isConfigured = false;  // we set it to false in case if we fail
			initUnflushedCount();
			if(m_typedConfigurations != nullptr)
			{
				Configurations* c = const_cast<Configurations*>(m_typedConfigurations->configurations());
				if(c->hasConfiguration(Level::Global, ConfigurationType::Filename))
				{
					// This check is definitely needed for cases like ELPP_NO_DEFAULT_LOG_FILE
					flush();
				}
			}
			base::threading::ScopedLock scopedLock(lock());
			if(m_configurations != configurations)
			{
				m_configurations.setFromBase(const_cast<Configurations*>(&configurations));
			}
			base::utils::safeDelete(m_typedConfigurations);
			m_typedConfigurations = new base::TypedConfigurations(&m_configurations, m_logStreamsReference);
			resolveLoggerFormatSpec();
			m_isConfigured = true;
		}

		/// @brief Reconfigures logger using existing configurations
		inline void reconfigure(void)
		{
			ELPP_INTERNAL_INFO(1, "Reconfiguring logger [" << m_id << "]");
			configure(m_configurations);
		}

		inline const std::string& id(void) const
		{
			return m_id;
		}

		inline const std::string& parentApplicationName(void) const
		{
			return m_parentApplicationName;
		}

		inline void setParentApplicationName(const std::string& parentApplicationName)
		{
			m_parentApplicationName = parentApplicationName;
		}

		inline Configurations* configurations(void)
		{
			return &m_configurations;
		}

		inline base::TypedConfigurations* typedConfigurations(void)
		{
			return m_typedConfigurations;
		}

		static inline bool isValidId(const std::string& id)
		{
			for(std::string::const_iterator it = id.begin(); it != id.end(); ++it)
			{
				if(!base::utils::Str::contains(base::consts::kValidLoggerIdSymbols, *it))
				{
					return false;
				}
			}
			return true;
		}
		/// @brief Flushes logger to sync all log files for all levels
		inline void flush(void)
		{
			ELPP_INTERNAL_INFO(3, "Flushing logger [" << m_id << "] all levels");
			base::threading::ScopedLock scopedLock(lock());
			base::type::EnumType lIndex = LevelHelper::kMinValid;
			LevelHelper::forEachLevel(&lIndex, [&](void) -> bool
			{
				flush(LevelHelper::castFromInt(lIndex), nullptr);
				return false;
			});
		}

		inline void flush(Level level, base::type::fstream_t* fs)
		{
			if(fs == nullptr && m_typedConfigurations->toFile(level))
			{
				fs = m_typedConfigurations->fileStream(level);
			}
			if(fs != nullptr)
			{
				fs->flush();
				m_unflushedCount.find(level)->second = 0;
			}
		}

		inline bool isFlushNeeded(Level level)
		{
			return ++m_unflushedCount.find(level)->second >= m_typedConfigurations->logFlushThreshold(level);
		}

		inline LogBuilder* logBuilder(void) const
		{
			return m_logBuilder.get();
		}

		inline void setLogBuilder(const LogBuilderPtr& logBuilder)
		{
			m_logBuilder = logBuilder;
		}

		inline bool enabled(Level level) const
		{
			return m_typedConfigurations->enabled(level);
		}

#if ELPP_VARIADIC_TEMPLATES_SUPPORTED
#   define LOGGER_LEVEL_WRITERS_SIGNATURES(FUNCTION_NAME)\
    template <typename T, typename... Args>\
    inline void FUNCTION_NAME(const char*, const T&, const Args&...);\
    template <typename T>\
    inline void FUNCTION_NAME(const T&);

		template <typename T, typename... Args>
		inline void verbose(int, const char*, const T&, const Args&...);

		template <typename T>
		inline void verbose(int, const T&);

		LOGGER_LEVEL_WRITERS_SIGNATURES(info)
			LOGGER_LEVEL_WRITERS_SIGNATURES(debug)
			LOGGER_LEVEL_WRITERS_SIGNATURES(warn)
			LOGGER_LEVEL_WRITERS_SIGNATURES(error)
			LOGGER_LEVEL_WRITERS_SIGNATURES(fatal)
			LOGGER_LEVEL_WRITERS_SIGNATURES(trace)
#   undef LOGGER_LEVEL_WRITERS_SIGNATURES
#endif // ELPP_VARIADIC_TEMPLATES_SUPPORTED
	private:
		std::string m_id;
		base::TypedConfigurations* m_typedConfigurations;
		base::type::stringstream_t m_stream;
		std::string m_parentApplicationName;
		bool m_isConfigured;
		Configurations m_configurations;
		std::map<Level, unsigned int> m_unflushedCount;
		base::LogStreamsReferenceMap* m_logStreamsReference;
		LogBuilderPtr m_logBuilder;

		friend class el::LogMessage;
		friend class el::Loggers;
		friend class el::Helpers;
		friend class el::base::RegisteredLoggers;
		friend class el::base::DefaultLogDispatchCallback;
		friend class el::base::MessageBuilder;
		friend class el::base::Writer;
		friend class el::base::PErrorWriter;
		friend class el::base::Storage;
		friend class el::base::PerformanceTracker;
		friend class el::base::LogDispatcher;

		Logger(void);

#if ELPP_VARIADIC_TEMPLATES_SUPPORTED
		template <typename T, typename... Args>
		void log_(Level, int, const char*, const T&, const Args&...);

		template <typename T>
		inline void log_(Level, int, const T&);

		template <typename T, typename... Args>
		void log(Level, const char*, const T&, const Args&...);

		template <typename T>
		inline void log(Level, const T&);
#endif // ELPP_VARIADIC_TEMPLATES_SUPPORTED

		void initUnflushedCount(void)
		{
			m_unflushedCount.clear();
			base::type::EnumType lIndex = LevelHelper::kMinValid;
			LevelHelper::forEachLevel(&lIndex, [&](void) -> bool
			{
				m_unflushedCount.insert(std::make_pair(LevelHelper::castFromInt(lIndex), 0));
				return false;
			});
		}

		inline base::type::stringstream_t& stream(void)
		{
			return m_stream;
		}

		void resolveLoggerFormatSpec(void) const
		{
			base::type::EnumType lIndex = LevelHelper::kMinValid;
			LevelHelper::forEachLevel(&lIndex, [&](void) -> bool
			{
				base::LogFormat* logFormat =
					const_cast<base::LogFormat*>(&m_typedConfigurations->logFormat(LevelHelper::castFromInt(lIndex)));
				base::utils::Str::replaceFirstWithEscape(logFormat->m_format, base::consts::kLoggerIdFormatSpecifier, m_id);
				return false;
			});
		}
	};
	namespace base {
		/// @brief Loggers repository
		class RegisteredLoggers : public base::utils::Registry<Logger, std::string>
		{
		public:
			explicit RegisteredLoggers(const LogBuilderPtr& defaultLogBuilder) :
				m_defaultLogBuilder(defaultLogBuilder)
			{
				m_defaultConfigurations.setToDefault();
			}

			virtual ~RegisteredLoggers(void)
			{
				flushAll();
			}

			inline void setDefaultConfigurations(const Configurations& configurations)
			{
				base::threading::ScopedLock scopedLock(lock());
				m_defaultConfigurations.setFromBase(const_cast<Configurations*>(&configurations));
			}

			inline Configurations* defaultConfigurations(void)
			{
				return &m_defaultConfigurations;
			}

			Logger* get(const std::string& id, bool forceCreation = true)
			{
				base::threading::ScopedLock scopedLock(lock());
				Logger* logger_ = base::utils::Registry<Logger, std::string>::get(id);
				if(logger_ == nullptr && forceCreation)
				{
					bool validId = Logger::isValidId(id);
					if(!validId)
					{
						ELPP_ASSERT(validId, "Invalid logger ID [" << id << "]. Not registering this logger.");
						return nullptr;
					}
					logger_ = new Logger(id, m_defaultConfigurations, &m_logStreamsReference);
					logger_->m_logBuilder = m_defaultLogBuilder;
					registerNew(id, logger_);
				}
				return logger_;
			}

			bool remove(const std::string& id)
			{
				if(id == "default")
				{
					return false;
				}
				Logger* logger = base::utils::Registry<Logger, std::string>::get(id);
				if(logger != nullptr)
				{
					unregister(logger);
				}
				return true;
			}

			inline bool has(const std::string& id)
			{
				return get(id, false) != nullptr;
			}

			inline void unregister(Logger*& logger)
			{
				base::threading::ScopedLock scopedLock(lock());
				base::utils::Registry<Logger, std::string>::unregister(logger->id());
			}

			inline base::LogStreamsReferenceMap* logStreamsReference(void)
			{
				return &m_logStreamsReference;
			}

			inline void flushAll(void)
			{
				ELPP_INTERNAL_INFO(1, "Flushing all log files");
				base::threading::ScopedLock scopedLock(lock());
				for(base::LogStreamsReferenceMap::iterator it = m_logStreamsReference.begin();
						it != m_logStreamsReference.end(); ++it)
				{
					if(it->second.get() == nullptr) continue;
					it->second->flush();
				}
			}

		private:
			LogBuilderPtr m_defaultLogBuilder;
			Configurations m_defaultConfigurations;
			base::LogStreamsReferenceMap m_logStreamsReference;
			friend class el::base::Storage;
		};
		/// @brief Represents registries for verbose logging
		class VRegistry : base::NoCopy, public base::threading::ThreadSafe
		{
		public:
			explicit VRegistry(base::type::VerboseLevel level, base::type::EnumType* pFlags) : m_level(level), m_pFlags(pFlags)
			{
			}

			/// @brief Sets verbose level. Accepted range is 0-9
			inline void setLevel(base::type::VerboseLevel level)
			{
				base::threading::ScopedLock scopedLock(lock());
				if(level < 0)
					m_level = 0;
				else if(level > 9)
					m_level = base::consts::kMaxVerboseLevel;
				else
					m_level = level;
			}

			inline base::type::VerboseLevel level(void) const
			{
				return m_level;
			}

			inline void clearModules(void)
			{
				base::threading::ScopedLock scopedLock(lock());
				m_modules.clear();
			}

			void setModules(const char* modules)
			{
				base::threading::ScopedLock scopedLock(lock());
				auto addSuffix = [](std::stringstream& ss, const char* sfx, const char* prev)
				{
					if(prev != nullptr && base::utils::Str::endsWith(ss.str(), std::string(prev)))
					{
						std::string chr(ss.str().substr(0, ss.str().size() - strlen(prev)));
						ss.str(std::string(""));
						ss << chr;
					}
					if(base::utils::Str::endsWith(ss.str(), std::string(sfx)))
					{
						std::string chr(ss.str().substr(0, ss.str().size() - strlen(sfx)));
						ss.str(std::string(""));
						ss << chr;
					}
					ss << sfx;
				};
				auto insert = [&](std::stringstream& ss, base::type::VerboseLevel level)
				{
					if(!base::utils::hasFlag(LoggingFlag::DisableVModulesExtensions, *m_pFlags))
					{
						addSuffix(ss, ".h", nullptr);
						m_modules.insert(std::make_pair(ss.str(), level));
						addSuffix(ss, ".c", ".h");
						m_modules.insert(std::make_pair(ss.str(), level));
						addSuffix(ss, ".cpp", ".c");
						m_modules.insert(std::make_pair(ss.str(), level));
						addSuffix(ss, ".cc", ".cpp");
						m_modules.insert(std::make_pair(ss.str(), level));
						addSuffix(ss, ".cxx", ".cc");
						m_modules.insert(std::make_pair(ss.str(), level));
						addSuffix(ss, ".-inl.h", ".cxx");
						m_modules.insert(std::make_pair(ss.str(), level));
						addSuffix(ss, ".hxx", ".-inl.h");
						m_modules.insert(std::make_pair(ss.str(), level));
						addSuffix(ss, ".hpp", ".hxx");
						m_modules.insert(std::make_pair(ss.str(), level));
						addSuffix(ss, ".hh", ".hpp");
					}
					m_modules.insert(std::make_pair(ss.str(), level));
				};
				bool isMod = true;
				bool isLevel = false;
				std::stringstream ss;
				int level = -1;
				for(; *modules; ++modules)
				{
					switch(*modules)
					{
					case '=':
					isLevel = true;
					isMod = false;
					break;
					case ',':
					isLevel = false;
					isMod = true;
					if(!ss.str().empty() && level != -1)
					{
						insert(ss, level);
						ss.str(std::string(""));
						level = -1;
					}
					break;
					default:
					if(isMod)
					{
						ss << *modules;
					}
					else if(isLevel)
					{
						if(isdigit(*modules))
						{
							level = static_cast<base::type::VerboseLevel>(*modules) - 48;
						}
					}
					break;
					}
				}
				if(!ss.str().empty() && level != -1)
				{
					insert(ss, level);
				}
			}

			bool allowed(base::type::VerboseLevel vlevel, const char* file)
			{
				base::threading::ScopedLock scopedLock(lock());
				if(m_modules.empty() || file == nullptr)
				{
					return vlevel <= m_level;
				}
				else
				{
					std::map<std::string, base::type::VerboseLevel>::iterator it = m_modules.begin();
					for(; it != m_modules.end(); ++it)
					{
						if(base::utils::Str::wildCardMatch(file, it->first.c_str()))
						{
							return vlevel <= it->second;
						}
					}
					if(base::utils::hasFlag(LoggingFlag::AllowVerboseIfModuleNotSpecified, *m_pFlags))
					{
						return true;
					}
					return false;
				}
			}

			inline const std::map<std::string, base::type::VerboseLevel>& modules(void) const
			{
				return m_modules;
			}

			void setFromArgs(const base::utils::CommandLineArgs* commandLineArgs)
			{
				if(commandLineArgs->hasParam("-v") || commandLineArgs->hasParam("--verbose") ||
					commandLineArgs->hasParam("-V") || commandLineArgs->hasParam("--VERBOSE"))
				{
					setLevel(base::consts::kMaxVerboseLevel);
				}
				else if(commandLineArgs->hasParamWithValue("--v"))
				{
					setLevel(atoi(commandLineArgs->getParamValue("--v")));
				}
				else if(commandLineArgs->hasParamWithValue("--V"))
				{
					setLevel(atoi(commandLineArgs->getParamValue("--V")));
				}
				else if((commandLineArgs->hasParamWithValue("-vmodule")) && vModulesEnabled())
				{
					setModules(commandLineArgs->getParamValue("-vmodule"));
				}
				else if(commandLineArgs->hasParamWithValue("-VMODULE") && vModulesEnabled())
				{
					setModules(commandLineArgs->getParamValue("-VMODULE"));
				}
			}

			/// @brief Whether or not vModules enabled
			inline bool vModulesEnabled(void)
			{
				return !base::utils::hasFlag(LoggingFlag::DisableVModules, *m_pFlags);
			}

		private:
			base::type::VerboseLevel m_level;
			base::type::EnumType* m_pFlags;
			std::map<std::string, base::type::VerboseLevel> m_modules;
		};
	}  // namespace base
	class LogMessage
	{
	public:
		LogMessage(Level level, const std::string& file, unsigned long int line, const std::string& func,
							  base::type::VerboseLevel verboseLevel, Logger* logger) :
			m_level(level), m_file(file), m_line(line), m_func(func),
			m_verboseLevel(verboseLevel), m_logger(logger), m_message(std::move(logger->stream().str()))
		{
		}
		inline Level level(void) const
		{
			return m_level;
		}
		inline const std::string& file(void) const
		{
			return m_file;
		}
		inline unsigned long int line(void) const
		{
			return m_line;
		} // NOLINT
		inline const std::string& func(void) const
		{
			return m_func;
		}
		inline base::type::VerboseLevel verboseLevel(void) const
		{
			return m_verboseLevel;
		}
		inline Logger* logger(void) const
		{
			return m_logger;
		}
		inline const base::type::string_t& message(void) const
		{
			return m_message;
		}
	private:
		Level m_level;
		std::string m_file;
		unsigned long int m_line;
		std::string m_func;
		base::type::VerboseLevel m_verboseLevel;
		Logger* m_logger;
		base::type::string_t m_message;
	};
	namespace base {
#if ELPP_ASYNC_LOGGING
		class AsyncLogItem
		{
		public:
			explicit AsyncLogItem(const LogMessage& logMessage, const LogDispatchData& data, const base::type::string_t& logLine)
				: m_logMessage(logMessage), m_dispatchData(data), m_logLine(logLine)
			{
			}
			virtual ~AsyncLogItem()
			{
			}
			inline LogMessage* logMessage(void)
			{
				return &m_logMessage;
			}
			inline LogDispatchData* data(void)
			{
				return &m_dispatchData;
			}
			inline base::type::string_t logLine(void)
			{
				return m_logLine;
			}
		private:
			LogMessage m_logMessage;
			LogDispatchData m_dispatchData;
			base::type::string_t m_logLine;
		};
		class AsyncLogQueue : public base::threading::ThreadSafe
		{
		public:
			virtual ~AsyncLogQueue()
			{
				ELPP_INTERNAL_INFO(6, "~AsyncLogQueue");
			}

			inline AsyncLogItem next(void)
			{
				base::threading::ScopedLock scopedLock(lock());
				AsyncLogItem result = m_queue.front();
				m_queue.pop();
				return result;
			}

			inline void push(const AsyncLogItem& item)
			{
				base::threading::ScopedLock scopedLock(lock());
				m_queue.push(item);
			}
			inline void pop(void)
			{
				base::threading::ScopedLock scopedLock(lock());
				m_queue.pop();
			}
			inline AsyncLogItem front(void)
			{
				base::threading::ScopedLock scopedLock(lock());
				return m_queue.front();
			}
			inline bool empty(void)
			{
				base::threading::ScopedLock scopedLock(lock());
				return m_queue.empty();
			}
		private:
			std::queue<AsyncLogItem> m_queue;
		};
		class IWorker
		{
		public:
			virtual ~IWorker()
			{
			}
			virtual void start() = 0;
		};
#endif // ELPP_ASYNC_LOGGING
		/// @brief Easylogging++ management storage
		class Storage : base::NoCopy, public base::threading::ThreadSafe
		{
		public:
#if ELPP_ASYNC_LOGGING
			Storage(const LogBuilderPtr& defaultLogBuilder, base::IWorker* asyncDispatchWorker) :
#else
			explicit Storage(const LogBuilderPtr& defaultLogBuilder) :
#endif  // ELPP_ASYNC_LOGGING
				m_registeredHitCounters(new base::RegisteredHitCounters()),
				m_registeredLoggers(new base::RegisteredLoggers(defaultLogBuilder)),
				m_flags(0x0),
				m_vRegistry(new base::VRegistry(0, &m_flags)),
#if ELPP_ASYNC_LOGGING
				m_asyncLogQueue(new base::AsyncLogQueue()),
				m_asyncDispatchWorker(asyncDispatchWorker),
#endif  // ELPP_ASYNC_LOGGING
				m_preRollOutCallback(base::defaultPreRollOutCallback)
			{
				// Register default logger
				m_registeredLoggers->get(std::string(base::consts::kDefaultLoggerId));
				// Register performance logger and reconfigure format
				Logger* performanceLogger = m_registeredLoggers->get(std::string(base::consts::kPerformanceLoggerId));
				performanceLogger->configurations()->setGlobally(ConfigurationType::Format, std::string("%datetime %level %msg"));
				performanceLogger->reconfigure();
#if defined(ELPP_SYSLOG)
				// Register syslog logger and reconfigure format
				Logger* sysLogLogger = m_registeredLoggers->get(std::string(base::consts::kSysLogLoggerId));
				sysLogLogger->configurations()->setGlobally(ConfigurationType::Format, std::string("%level: %msg"));
				sysLogLogger->reconfigure();
#else
				ELPP_UNUSED(base::consts::kSysLogLoggerId);
#endif //  defined(ELPP_SYSLOG)
				addFlag(LoggingFlag::AllowVerboseIfModuleNotSpecified);
#if ELPP_ASYNC_LOGGING
				installLogDispatchCallback<base::AsyncLogDispatchCallback>(std::string("AsyncLogDispatchCallback"));
#else
				installLogDispatchCallback<base::DefaultLogDispatchCallback>(std::string("DefaultLogDispatchCallback"));
#endif  // ELPP_ASYNC_LOGGING
				installPerformanceTrackingCallback<base::DefaultPerformanceTrackingCallback>(std::string("DefaultPerformanceTrackingCallback"));
				ELPP_INTERNAL_INFO(1, "Easylogging++ has been initialized");
#if ELPP_ASYNC_LOGGING
				m_asyncDispatchWorker->start();
#endif  // ELPP_ASYNC_LOGGING
			}

			virtual ~Storage(void)
			{
				ELPP_INTERNAL_INFO(4, "Destroying storage");
#if ELPP_ASYNC_LOGGING
				ELPP_INTERNAL_INFO(5, "Replacing log dispatch callback to synchronous");
				uninstallLogDispatchCallback<base::AsyncLogDispatchCallback>(std::string("AsyncLogDispatchCallback"));
				installLogDispatchCallback<base::DefaultLogDispatchCallback>(std::string("DefaultLogDispatchCallback"));
				ELPP_INTERNAL_INFO(5, "Destroying asyncDispatchWorker");
				base::utils::safeDelete(m_asyncDispatchWorker);
				ELPP_INTERNAL_INFO(5, "Destroying asyncLogQueue");
				base::utils::safeDelete(m_asyncLogQueue);
#endif  // ELPP_ASYNC_LOGGING
				ELPP_INTERNAL_INFO(5, "Destroying registeredHitCounters");
				base::utils::safeDelete(m_registeredHitCounters);
				ELPP_INTERNAL_INFO(5, "Destroying registeredLoggers");
				base::utils::safeDelete(m_registeredLoggers);
				ELPP_INTERNAL_INFO(5, "Destroying vRegistry");
				base::utils::safeDelete(m_vRegistry);
			}

			inline bool validateEveryNCounter(const char* filename, unsigned long int lineNumber, std::size_t occasion)
			{
				return hitCounters()->validateEveryN(filename, lineNumber, occasion);
			}

			inline bool validateAfterNCounter(const char* filename, unsigned long int lineNumber, std::size_t n)
			{ // NOLINT
				return hitCounters()->validateAfterN(filename, lineNumber, n);
			}

			inline bool validateNTimesCounter(const char* filename, unsigned long int lineNumber, std::size_t n)
			{ // NOLINT
				return hitCounters()->validateNTimes(filename, lineNumber, n);
			}

			inline base::RegisteredHitCounters* hitCounters(void) const
			{
				return m_registeredHitCounters;
			}

			inline base::RegisteredLoggers* registeredLoggers(void) const
			{
				return m_registeredLoggers;
			}

			inline base::VRegistry* vRegistry(void) const
			{
				return m_vRegistry;
			}

#if ELPP_ASYNC_LOGGING
			inline base::AsyncLogQueue* asyncLogQueue(void) const
			{
				return m_asyncLogQueue;
			}
#endif  // ELPP_ASYNC_LOGGING

			inline const base::utils::CommandLineArgs* commandLineArgs(void) const
			{
				return &m_commandLineArgs;
			}

			inline void addFlag(LoggingFlag flag)
			{
				base::utils::addFlag(flag, &m_flags);
			}

			inline void removeFlag(LoggingFlag flag)
			{
				base::utils::removeFlag(flag, &m_flags);
			}

			inline bool hasFlag(LoggingFlag flag) const
			{
				return base::utils::hasFlag(flag, m_flags);
			}

			inline base::type::EnumType flags(void) const
			{
				return m_flags;
			}

			inline void setFlags(base::type::EnumType flags)
			{
				m_flags = flags;
			}

			inline void setPreRollOutCallback(const PreRollOutCallback& callback)
			{
				m_preRollOutCallback = callback;
			}

			inline void unsetPreRollOutCallback(void)
			{
				m_preRollOutCallback = base::defaultPreRollOutCallback;
			}

			inline PreRollOutCallback& preRollOutCallback(void)
			{
				return m_preRollOutCallback;
			}

			inline bool hasCustomFormatSpecifier(const char* formatSpecifier)
			{
				base::threading::ScopedLock scopedLock(lock());
				return std::find(m_customFormatSpecifiers.begin(), m_customFormatSpecifiers.end(),
						formatSpecifier) != m_customFormatSpecifiers.end();
			}

			inline void installCustomFormatSpecifier(const CustomFormatSpecifier& customFormatSpecifier)
			{
				if(hasCustomFormatSpecifier(customFormatSpecifier.formatSpecifier()))
				{
					return;
				}
				base::threading::ScopedLock scopedLock(lock());
				m_customFormatSpecifiers.push_back(customFormatSpecifier);
			}

			inline bool uninstallCustomFormatSpecifier(const char* formatSpecifier)
			{
				base::threading::ScopedLock scopedLock(lock());
				std::vector<CustomFormatSpecifier>::iterator it = std::find(m_customFormatSpecifiers.begin(),
						m_customFormatSpecifiers.end(), formatSpecifier);
				if(it != m_customFormatSpecifiers.end() && strcmp(formatSpecifier, it->formatSpecifier()) == 0)
				{
					m_customFormatSpecifiers.erase(it);
					return true;
				}
				return false;
			}

			const std::vector<CustomFormatSpecifier>* customFormatSpecifiers(void) const
			{
				return &m_customFormatSpecifiers;
			}

			inline void setLoggingLevel(Level level)
			{
				m_loggingLevel = level;
			}

			template <typename T>
			inline bool installLogDispatchCallback(const std::string& id)
			{
				return installCallback<T, base::type::LogDispatchCallbackPtr>(id, &m_logDispatchCallbacks);
			}

			template <typename T>
			inline void uninstallLogDispatchCallback(const std::string& id)
			{
				uninstallCallback<T, base::type::LogDispatchCallbackPtr>(id, &m_logDispatchCallbacks);
			}
			template <typename T>
			inline T* logDispatchCallback(const std::string& id)
			{
				return callback<T, base::type::LogDispatchCallbackPtr>(id, &m_logDispatchCallbacks);
			}

			template <typename T>
			inline bool installPerformanceTrackingCallback(const std::string& id)
			{
				return installCallback<T, base::type::PerformanceTrackingCallbackPtr>(id, &m_performanceTrackingCallbacks);
			}

			template <typename T>
			inline void uninstallPerformanceTrackingCallback(const std::string& id)
			{
				uninstallCallback<T, base::type::PerformanceTrackingCallbackPtr>(id, &m_performanceTrackingCallbacks);
			}

			template <typename T>
			inline T* performanceTrackingCallback(const std::string& id)
			{
				return callback<T, base::type::PerformanceTrackingCallbackPtr>(id, &m_performanceTrackingCallbacks);
			}
		private:
			base::RegisteredHitCounters* m_registeredHitCounters;
			base::RegisteredLoggers* m_registeredLoggers;
			base::type::EnumType m_flags;
			base::VRegistry* m_vRegistry;
#if ELPP_ASYNC_LOGGING
			base::AsyncLogQueue* m_asyncLogQueue;
			base::IWorker* m_asyncDispatchWorker;
#endif  // ELPP_ASYNC_LOGGING
			base::utils::CommandLineArgs m_commandLineArgs;
			PreRollOutCallback m_preRollOutCallback;
			std::map<std::string, base::type::LogDispatchCallbackPtr> m_logDispatchCallbacks;
			std::map<std::string, base::type::PerformanceTrackingCallbackPtr> m_performanceTrackingCallbacks;
			std::vector<CustomFormatSpecifier> m_customFormatSpecifiers;
			Level m_loggingLevel;

			friend class el::Helpers;
			friend class el::base::DefaultLogDispatchCallback;
			friend class el::LogBuilder;
			friend class el::base::MessageBuilder;
			friend class el::base::Writer;
			friend class el::base::PerformanceTracker;
			friend class el::base::LogDispatcher;

			void setApplicationArguments(int argc, char** argv)
			{
				m_commandLineArgs.setArgs(argc, argv);
				m_vRegistry->setFromArgs(commandLineArgs());
				// default log file
#if !defined(ELPP_DISABLE_LOG_FILE_FROM_ARG)
				if(m_commandLineArgs.hasParamWithValue(base::consts::kDefaultLogFileParam))
				{
					Configurations c;
					c.setGlobally(ConfigurationType::Filename, std::string(m_commandLineArgs.getParamValue(base::consts::kDefaultLogFileParam)));
					registeredLoggers()->setDefaultConfigurations(c);
					for(base::RegisteredLoggers::iterator it = registeredLoggers()->begin();
							it != registeredLoggers()->end(); ++it)
					{
						it->second->configure(c);
					}
				}
#endif  // !defined(ELPP_DISABLE_LOG_FILE_FROM_ARG)
#if defined(ELPP_LOGGING_FLAGS_FROM_ARG)
				if(m_commandLineArgs.hasParamWithValue(base::consts::kLoggingFlagsParam))
				{
					m_flags = atoi(m_commandLineArgs.getParamValue(base::consts::kLoggingFlagsParam));
				}
#endif  // defined(ELPP_LOGGING_FLAGS_FROM_ARG)
			}

			inline void setApplicationArguments(int argc, const char** argv)
			{
				setApplicationArguments(argc, const_cast<char**>(argv));
			}

			template <typename T, typename TPtr>
			inline bool installCallback(const std::string& id, std::map<std::string, TPtr>* mapT)
			{
				if(mapT->find(id) == mapT->end())
				{
					mapT->insert(std::make_pair(id, TPtr(new T())));
					return true;
				}
				return false;
			}

			template <typename T, typename TPtr>
			inline void uninstallCallback(const std::string& id, std::map<std::string, TPtr>* mapT)
			{
				if(mapT->find(id) != mapT->end())
				{
					mapT->erase(id);
				}
			}

			template <typename T, typename TPtr>
			inline T* callback(const std::string& id, std::map<std::string, TPtr>* mapT)
			{
				typename std::map<std::string, TPtr>::iterator iter = mapT->find(id);
				if(iter != mapT->end())
				{
					return static_cast<T*>(iter->second.get());
				}
				return nullptr;
			}
		};
		extern ELPP_EXPORT base::type::StoragePointer elStorage;
#define ELPP el::base::elStorage
		class DefaultLogDispatchCallback : public LogDispatchCallback
		{
		protected:
			void handle(const LogDispatchData* data)
			{
				m_data = data;
				dispatch(std::move(m_data->logMessage()->logger()->logBuilder()->build(m_data->logMessage(),
						 m_data->dispatchAction() == base::DispatchAction::NormalLog)));
			}
		private:
			const LogDispatchData* m_data;
			void dispatch(base::type::string_t&& logLine)
			{
				if(m_data->dispatchAction() == base::DispatchAction::NormalLog)
				{
					if(m_data->logMessage()->logger()->m_typedConfigurations->toFile(m_data->logMessage()->level()))
					{
						base::type::fstream_t* fs = m_data->logMessage()->logger()->m_typedConfigurations->fileStream(m_data->logMessage()->level());
						if(fs != nullptr)
						{
							fs->write(logLine.c_str(), logLine.size());
							if(fs->fail())
							{
								ELPP_INTERNAL_ERROR("Unable to write log to file ["
									<< m_data->logMessage()->logger()->m_typedConfigurations->filename(m_data->logMessage()->level()) << "].\n"
										<< "Few possible reasons (could be something else):\n" << "      * Permission denied\n"
										<< "      * Disk full\n" << "      * Disk is not writable", true);
							}
							else
							{
								if(ELPP->hasFlag(LoggingFlag::ImmediateFlush) || (m_data->logMessage()->logger()->isFlushNeeded(m_data->logMessage()->level())))
								{
									m_data->logMessage()->logger()->flush(m_data->logMessage()->level(), fs);
								}
							}
						}
						else
						{
							ELPP_INTERNAL_ERROR("Log file for [" << LevelHelper::convertToString(m_data->logMessage()->level()) << "] "
								<< "has not been configured but [TO_FILE] is configured to TRUE. [Logger ID: "
								<< m_data->logMessage()->logger()->id() << "]", false);
						}
					}
					if(m_data->logMessage()->logger()->m_typedConfigurations->toStandardOutput(m_data->logMessage()->level()))
					{
						if(ELPP->hasFlag(LoggingFlag::ColoredTerminalOutput))
							m_data->logMessage()->logger()->logBuilder()->convertToColoredOutput(&logLine, m_data->logMessage()->level());
						ELPP_COUT << ELPP_COUT_LINE(logLine);
					}
				}
#if defined(ELPP_SYSLOG)
				else if(m_data->dispatchAction() == base::DispatchAction::SysLog)
				{
					// Determine syslog priority
					int sysLogPriority = 0;
					if(m_data->logMessage()->level() == Level::Fatal)
						sysLogPriority = LOG_EMERG;
					else if(m_data->logMessage()->level() == Level::Error)
						sysLogPriority = LOG_ERR;
					else if(m_data->logMessage()->level() == Level::Warning)
						sysLogPriority = LOG_WARNING;
					else if(m_data->logMessage()->level() == Level::Info)
						sysLogPriority = LOG_INFO;
					else if(m_data->logMessage()->level() == Level::Debug)
						sysLogPriority = LOG_DEBUG;
					else
						sysLogPriority = LOG_NOTICE;
#   if defined(ELPP_UNICODE)
					char* line = base::utils::Str::wcharPtrToCharPtr(logLine.c_str());
					syslog(sysLogPriority, "%s", line);
					free(line);
#   else
					syslog(sysLogPriority, "%s", logLine.c_str());
#   endif
				}
#endif  // defined(ELPP_SYSLOG)
			}
		};
#if ELPP_ASYNC_LOGGING
		class AsyncLogDispatchCallback : public LogDispatchCallback
		{
		protected:
			void handle(const LogDispatchData* data)
			{
				base::type::string_t logLine = data->logMessage()->logger()->logBuilder()->build(data->logMessage(), data->dispatchAction() == base::DispatchAction::NormalLog);
				if(data->dispatchAction() == base::DispatchAction::NormalLog && data->logMessage()->logger()->typedConfigurations()->toStandardOutput(data->logMessage()->level()))
				{
					if(ELPP->hasFlag(LoggingFlag::ColoredTerminalOutput))
						data->logMessage()->logger()->logBuilder()->convertToColoredOutput(&logLine, data->logMessage()->level());
					ELPP_COUT << ELPP_COUT_LINE(logLine);
				}
				// Save resources and only queue if we want to write to file otherwise just ignore handler
				if(data->logMessage()->logger()->typedConfigurations()->toFile(data->logMessage()->level()))
				{
					ELPP->asyncLogQueue()->push(AsyncLogItem(*(data->logMessage()), *data, logLine));
				}
			}
		};
		class AsyncDispatchWorker : public base::IWorker, public base::threading::ThreadSafe
		{
		public:
			AsyncDispatchWorker()
			{
				setContinueRunning(false);
			}

			virtual ~AsyncDispatchWorker()
			{
				setContinueRunning(false);
				ELPP_INTERNAL_INFO(6, "Stopping dispatch worker - Cleaning log queue");
				clean();
				ELPP_INTERNAL_INFO(6, "Log queue cleaned");
			}

			inline bool clean()
			{
				std::mutex m;
				std::unique_lock<std::mutex> lk(m);
				cv.wait(lk, []
				{
					return !ELPP->asyncLogQueue()->empty();
				});
				emptyQueue();
				lk.unlock();
				cv.notify_one();
				return ELPP->asyncLogQueue()->empty();
			}

			inline void emptyQueue()
			{
				while(!ELPP->asyncLogQueue()->empty())
				{
					AsyncLogItem data = ELPP->asyncLogQueue()->next();
					handle(&data);
					base::threading::msleep(100);
				}
			}

			virtual inline void start()
			{
				base::threading::msleep(5000); // Wait extra few seconds
				setContinueRunning(true);
				std::thread t1(&AsyncDispatchWorker::runner, this);
				t1.join();
			}

			void handle(AsyncLogItem* logItem)
			{
				LogDispatchData* data = logItem->data();
				LogMessage* logMessage = logItem->logMessage();
				Logger* logger = logMessage->logger();
				base::TypedConfigurations* conf = logger->typedConfigurations();
				base::type::string_t logLine = logItem->logLine();
				if(data->dispatchAction() == base::DispatchAction::NormalLog)
				{
					if(conf->toFile(logMessage->level()))
					{
						base::type::fstream_t* fs = conf->fileStream(logMessage->level());
						if(fs != nullptr)
						{
							fs->write(logLine.c_str(), logLine.size());
							if(fs->fail())
							{
								ELPP_INTERNAL_ERROR("Unable to write log to file ["
									<< conf->filename(logMessage->level()) << "].\n"
										<< "Few possible reasons (could be something else):\n" << "      * Permission denied\n"
										<< "      * Disk full\n" << "      * Disk is not writable", true);
							}
							else
							{
								if(ELPP->hasFlag(LoggingFlag::ImmediateFlush) || (logger->isFlushNeeded(logMessage->level())))
								{
									logger->flush(logMessage->level(), fs);
								}
							}
						}
						else
						{
							ELPP_INTERNAL_ERROR("Log file for [" << LevelHelper::convertToString(logMessage->level()) << "] "
								<< "has not been configured but [TO_FILE] is configured to TRUE. [Logger ID: " << logger->id() << "]", false);
						}
					}
				}
#   if defined(ELPP_SYSLOG)
				else if(data->dispatchAction() == base::DispatchAction::SysLog)
				{
					// Determine syslog priority
					int sysLogPriority = 0;
					if(logMessage->level() == Level::Fatal)
						sysLogPriority = LOG_EMERG;
					else if(logMessage->level() == Level::Error)
						sysLogPriority = LOG_ERR;
					else if(logMessage->level() == Level::Warning)
						sysLogPriority = LOG_WARNING;
					else if(logMessage->level() == Level::Info)
						sysLogPriority = LOG_INFO;
					else if(logMessage->level() == Level::Debug)
						sysLogPriority = LOG_DEBUG;
					else
						sysLogPriority = LOG_NOTICE;
#      if defined(ELPP_UNICODE)
					char* line = base::utils::Str::wcharPtrToCharPtr(logLine.c_str());
					syslog(sysLogPriority, "%s", line);
					free(line);
#      else
					syslog(sysLogPriority, "%s", logLine.c_str());
#      endif
				}
#   endif  // defined(ELPP_SYSLOG)
			}

			void run()
			{
				while(continueRunning())
				{
					emptyQueue();
					base::threading::msleep(10); // 10ms
				}
			}

			static void* runner(void* context)
			{
				static_cast<AsyncDispatchWorker*>(context)->run();
				return NULL;
			}

			void setContinueRunning(bool value)
			{
				base::threading::ScopedLock scopedLock(m_continueRunningMutex);
				m_continueRunning = value;
			}
			bool continueRunning(void)
			{
				return m_continueRunning;
			}
		private:
			std::condition_variable cv;
			bool m_continueRunning;
			base::threading::Mutex m_continueRunningMutex;
		};
#endif  // ELPP_ASYNC_LOGGING
	}  // namespace base
	namespace base {
		class DefaultLogBuilder : public LogBuilder
		{
		public:
			base::type::string_t build(const LogMessage* logMessage, bool appendNewLine) const
			{
				base::TypedConfigurations* tc = logMessage->logger()->typedConfigurations();
				const base::LogFormat* logFormat = &tc->logFormat(logMessage->level());
				base::type::string_t logLine = logFormat->format();
				char buff[base::consts::kSourceFilenameMaxLength + base::consts::kSourceLineMaxLength] = "";
				const char* bufLim = buff + sizeof(buff);
				if(logFormat->hasFlag(base::FormatFlags::AppName))
				{
					// App name
					base::utils::Str::replaceFirstWithEscape(logLine, base::consts::kAppNameFormatSpecifier,
							logMessage->logger()->parentApplicationName());
				}
				if(logFormat->hasFlag(base::FormatFlags::ThreadId))
				{
					// Thread ID
					base::utils::Str::replaceFirstWithEscape(logLine, base::consts::kThreadIdFormatSpecifier,
							base::threading::getCurrentThreadId());
				}
				if(logFormat->hasFlag(base::FormatFlags::DateTime))
				{
					// DateTime
					base::utils::Str::replaceFirstWithEscape(logLine, base::consts::kDateTimeFormatSpecifier,
							base::utils::DateTime::getDateTime(logFormat->dateTimeFormat().c_str(),
															 &tc->millisecondsWidth(logMessage->level())));
				}
				if(logFormat->hasFlag(base::FormatFlags::Function))
				{
					// Function
					base::utils::Str::replaceFirstWithEscape(logLine, base::consts::kLogFunctionFormatSpecifier, logMessage->func());
				}
				if(logFormat->hasFlag(base::FormatFlags::File))
				{
					// File
					char* buf = base::utils::Str::clearBuff(buff, base::consts::kSourceFilenameMaxLength);
					base::utils::File::buildStrippedFilename(logMessage->file().c_str(), buff);
					buf = base::utils::Str::addToBuff(buff, buf, bufLim);
					base::utils::Str::replaceFirstWithEscape(logLine, base::consts::kLogFileFormatSpecifier, std::string(buff));
				}
				if(logFormat->hasFlag(base::FormatFlags::FileBase))
				{
					// FileBase
					char* buf = base::utils::Str::clearBuff(buff, base::consts::kSourceFilenameMaxLength);
					base::utils::File::buildBaseFilename(logMessage->file(), buff);
					buf = base::utils::Str::addToBuff(buff, buf, bufLim);
					base::utils::Str::replaceFirstWithEscape(logLine, base::consts::kLogFileBaseFormatSpecifier, std::string(buff));
				}
				if(logFormat->hasFlag(base::FormatFlags::Line))
				{
					// Line
					char* buf = base::utils::Str::clearBuff(buff, base::consts::kSourceLineMaxLength);
					buf = base::utils::Str::convertAndAddToBuff(logMessage->line(),
						base::consts::kSourceLineMaxLength, buf, bufLim, false);
					base::utils::Str::replaceFirstWithEscape(logLine, base::consts::kLogLineFormatSpecifier, std::string(buff));
				}
				if(logFormat->hasFlag(base::FormatFlags::Location))
				{
					// Location
					char* buf = base::utils::Str::clearBuff(buff,
						base::consts::kSourceFilenameMaxLength + base::consts::kSourceLineMaxLength);
					base::utils::File::buildStrippedFilename(logMessage->file().c_str(), buff);
					buf = base::utils::Str::addToBuff(buff, buf, bufLim);
					buf = base::utils::Str::addToBuff(":", buf, bufLim);
					buf = base::utils::Str::convertAndAddToBuff(logMessage->line(),
						base::consts::kSourceLineMaxLength, buf, bufLim, false);
					base::utils::Str::replaceFirstWithEscape(logLine, base::consts::kLogLocationFormatSpecifier, std::string(buff));
				}
				if(logMessage->level() == Level::Verbose && logFormat->hasFlag(base::FormatFlags::VerboseLevel))
				{
					// Verbose level
					char* buf = base::utils::Str::clearBuff(buff, 1);
					buf = base::utils::Str::convertAndAddToBuff(logMessage->verboseLevel(), 1, buf, bufLim, false);
					base::utils::Str::replaceFirstWithEscape(logLine, base::consts::kVerboseLevelFormatSpecifier, std::string(buff));
				}
				if(logFormat->hasFlag(base::FormatFlags::LogMessage))
				{
					// Log message
					base::utils::Str::replaceFirstWithEscape(logLine, base::consts::kMessageFormatSpecifier, logMessage->message());
				}
#if !defined(ELPP_DISABLE_CUSTOM_FORMAT_SPECIFIERS)
				for(std::vector<CustomFormatSpecifier>::const_iterator it = ELPP->customFormatSpecifiers()->begin();
						it != ELPP->customFormatSpecifiers()->end(); ++it)
				{
					std::string fs(it->formatSpecifier());
					base::type::string_t wcsFormatSpecifier(fs.begin(), fs.end());
					base::utils::Str::replaceFirstWithEscape(logLine, wcsFormatSpecifier, std::string(it->resolver()()));
				}
#endif  // !defined(ELPP_DISABLE_CUSTOM_FORMAT_SPECIFIERS)
				if(appendNewLine) logLine += ELPP_LITERAL("\n");
				return logLine;
			}
		};
		/// @brief Dispatches log messages
		class LogDispatcher : base::NoCopy
		{
		public:
			LogDispatcher(bool proceed, LogMessage&& logMessage, base::DispatchAction dispatchAction) :
				m_proceed(proceed),
				m_logMessage(std::move(logMessage)),
				m_dispatchAction(std::move(dispatchAction))
			{
			}

			void dispatch(void)
			{
				if(m_proceed && m_dispatchAction == base::DispatchAction::None)
				{
					m_proceed = false;
				}
				if(!m_proceed)
				{
					return;
				}
				// We minimize the time of ELPP's lock - this lock is released after log is written
				base::threading::ScopedLock scopedLock(ELPP->lock());
				base::TypedConfigurations* tc = m_logMessage.logger()->m_typedConfigurations;
				if(ELPP->hasFlag(LoggingFlag::StrictLogFileSizeCheck))
				{
					tc->validateFileRolling(m_logMessage.level(), ELPP->preRollOutCallback());
				}
				LogDispatchCallback* callback = nullptr;
				LogDispatchData data;
				for(const std::pair<std::string, base::type::LogDispatchCallbackPtr>& h
						: ELPP->m_logDispatchCallbacks)
				{
					callback = h.second.get();
					if(callback != nullptr && callback->enabled())
					{
						data.setLogMessage(&m_logMessage);
						data.setDispatchAction(m_dispatchAction);
						callback->acquireLock();
						callback->handle(&data);
						callback->releaseLock();
					}
				}
			}

		private:
			bool m_proceed;
			LogMessage m_logMessage;
			base::DispatchAction m_dispatchAction;
		};
#if defined(ELPP_STL_LOGGING)
		/// @brief Workarounds to write some STL logs
		///
		/// @detail There is workaround needed to loop through some stl containers. In order to do that, we need iterable containers
		/// of same type and provide iterator interface and pass it on to writeIterator().
		/// Remember, this is passed by value in constructor so that we dont change original containers.
		/// This operation is as expensive as Big-O(std::min(class_.size(), base::consts::kMaxLogPerContainer))
		namespace workarounds {
			/// @brief Abstract IterableContainer template that provides interface for iterable classes of type T
			template <typename T, typename Container>
			class IterableContainer
			{
			public:
				typedef typename Container::iterator iterator;
				typedef typename Container::const_iterator const_iterator;
				IterableContainer(void)
				{
				}
				virtual ~IterableContainer(void)
				{
				}
				iterator begin(void)
				{
					return getContainer().begin();
				}
				iterator end(void)
				{
					return getContainer().end();
				}
			private:
				virtual Container& getContainer(void) = 0;
			};
			/// @brief Implements IterableContainer and provides iterable std::priority_queue class
			template<typename T, typename Container = std::vector<T>, typename Comparator = std::less<typename Container::value_type>>
			class IterablePriorityQueue : public IterableContainer<T, Container>, public std::priority_queue<T, Container, Comparator>
			{
			public:
				IterablePriorityQueue(std::priority_queue<T, Container, Comparator> queue_)
				{
					std::size_t count_ = 0;
					while(++count_ < base::consts::kMaxLogPerContainer && !queue_.empty())
					{
						this->push(queue_.top());
						queue_.pop();
					}
				}
			private:
				inline Container& getContainer(void)
				{
					return this->c;
				}
			};
			/// @brief Implements IterableContainer and provides iterable std::queue class
			template<typename T, typename Container = std::deque<T>>
			class IterableQueue : public IterableContainer<T, Container>, public std::queue<T, Container>
			{
			public:
				IterableQueue(std::queue<T, Container> queue_)
				{
					std::size_t count_ = 0;
					while(++count_ < base::consts::kMaxLogPerContainer && !queue_.empty())
					{
						this->push(queue_.front());
						queue_.pop();
					}
				}
			private:
				inline Container& getContainer(void)
				{
					return this->c;
				}
			};
			/// @brief Implements IterableContainer and provides iterable std::stack class
			template<typename T, typename Container = std::deque<T>>
			class IterableStack : public IterableContainer<T, Container>, public std::stack<T, Container>
			{
			public:
				IterableStack(std::stack<T, Container> stack_)
				{
					std::size_t count_ = 0;
					while(++count_ < base::consts::kMaxLogPerContainer && !stack_.empty())
					{
						this->push(stack_.top());
						stack_.pop();
					}
				}
			private:
				inline Container& getContainer(void)
				{
					return this->c;
				}
			};
		}  // namespace workarounds
#endif  // defined(ELPP_STL_LOGGING)
// Log message builder
		class MessageBuilder
		{
		public:
			MessageBuilder(void) : m_logger(nullptr), m_containerLogSeperator(ELPP_LITERAL(""))
			{
			}
			void initialize(Logger* logger)
			{
				m_logger = logger;
				m_containerLogSeperator = ELPP->hasFlag(LoggingFlag::NewLineForContainer) ?
					ELPP_LITERAL("\n    ") : ELPP_LITERAL(", ");
			}

#   define ELPP_SIMPLE_LOG(LOG_TYPE)\
    inline MessageBuilder& operator<<(LOG_TYPE msg) {\
        m_logger->stream() << msg;\
        if (ELPP->hasFlag(LoggingFlag::AutoSpacing)) {\
            m_logger->stream() << " ";\
        }\
        return *this;\
    }

			inline MessageBuilder& operator<<(const std::string& msg)
			{
				return operator<<(msg.c_str());
			}
			ELPP_SIMPLE_LOG(char)
				ELPP_SIMPLE_LOG(bool)
				ELPP_SIMPLE_LOG(signed short)
				ELPP_SIMPLE_LOG(unsigned short)
				ELPP_SIMPLE_LOG(signed int)
				ELPP_SIMPLE_LOG(unsigned int)
				ELPP_SIMPLE_LOG(signed long)
				ELPP_SIMPLE_LOG(unsigned long)
				ELPP_SIMPLE_LOG(float)
				ELPP_SIMPLE_LOG(double)
				ELPP_SIMPLE_LOG(char*)
				ELPP_SIMPLE_LOG(const char*)
				ELPP_SIMPLE_LOG(const void*)
				ELPP_SIMPLE_LOG(long double)
				inline MessageBuilder& operator<<(const std::wstring& msg)
			{
				return operator<<(msg.c_str());
			}
			inline MessageBuilder& operator<<(const wchar_t* msg)
			{
				if(msg == nullptr)
				{
					m_logger->stream() << base::consts::kNullPointer;
					return *this;
				}
#   if defined(ELPP_UNICODE)
				m_logger->stream() << msg;
#   else
				char* buff_ = base::utils::Str::wcharPtrToCharPtr(msg);
				m_logger->stream() << buff_;
				free(buff_);
#   endif
				if(ELPP->hasFlag(LoggingFlag::AutoSpacing))
				{
					m_logger->stream() << " ";
				}
				return *this;
			}
			// ostream manipulators
			inline MessageBuilder& operator<<(std::ostream& (*OStreamMani)(std::ostream&))
			{
				m_logger->stream() << OStreamMani;
				return *this;
			}
#define ELPP_ITERATOR_CONTAINER_LOG_ONE_ARG(temp)                                                    \
    template <typename T>                                                                            \
    inline MessageBuilder& operator<<(const temp<T>& template_inst) {                                \
        return writeIterator(template_inst.begin(), template_inst.end(), template_inst.size());      \
    }
#define ELPP_ITERATOR_CONTAINER_LOG_TWO_ARG(temp)                                                    \
    template <typename T1, typename T2>                                                              \
    inline MessageBuilder& operator<<(const temp<T1, T2>& template_inst) {                           \
        return writeIterator(template_inst.begin(), template_inst.end(), template_inst.size());      \
    }
#define ELPP_ITERATOR_CONTAINER_LOG_THREE_ARG(temp)                                                  \
    template <typename T1, typename T2, typename T3>                                                 \
    inline MessageBuilder& operator<<(const temp<T1, T2, T3>& template_inst) {                       \
        return writeIterator(template_inst.begin(), template_inst.end(), template_inst.size());      \
    }
#define ELPP_ITERATOR_CONTAINER_LOG_FOUR_ARG(temp)                                                   \
    template <typename T1, typename T2, typename T3, typename T4>                                    \
    inline MessageBuilder& operator<<(const temp<T1, T2, T3, T4>& template_inst) {                   \
        return writeIterator(template_inst.begin(), template_inst.end(), template_inst.size());      \
    }
#define ELPP_ITERATOR_CONTAINER_LOG_FIVE_ARG(temp)                                                   \
    template <typename T1, typename T2, typename T3, typename T4, typename T5>                       \
    inline MessageBuilder& operator<<(const temp<T1, T2, T3, T4, T5>& template_inst) {               \
        return writeIterator(template_inst.begin(), template_inst.end(), template_inst.size());      \
    }

#if defined(ELPP_STL_LOGGING)
			ELPP_ITERATOR_CONTAINER_LOG_TWO_ARG(std::vector)
				ELPP_ITERATOR_CONTAINER_LOG_TWO_ARG(std::list)
				ELPP_ITERATOR_CONTAINER_LOG_TWO_ARG(std::deque)
				ELPP_ITERATOR_CONTAINER_LOG_THREE_ARG(std::set)
				ELPP_ITERATOR_CONTAINER_LOG_THREE_ARG(std::multiset)
				ELPP_ITERATOR_CONTAINER_LOG_FOUR_ARG(std::map)
				ELPP_ITERATOR_CONTAINER_LOG_FOUR_ARG(std::multimap)
				template <class T, class Container>
			inline MessageBuilder& operator<<(const std::queue<T, Container>& queue_)
			{
				base::workarounds::IterableQueue<T, Container> iterableQueue_ =
					static_cast<base::workarounds::IterableQueue<T, Container>>(queue_);
				return writeIterator(iterableQueue_.begin(), iterableQueue_.end(), iterableQueue_.size());
			}
			template <class T, class Container>
			inline MessageBuilder& operator<<(const std::stack<T, Container>& stack_)
			{
				base::workarounds::IterableStack<T, Container> iterableStack_ =
					static_cast<base::workarounds::IterableStack<T, Container>>(stack_);
				return writeIterator(iterableStack_.begin(), iterableStack_.end(), iterableStack_.size());
			}
			template <class T, class Container, class Comparator>
			inline MessageBuilder& operator<<(const std::priority_queue<T, Container, Comparator>& priorityQueue_)
			{
				base::workarounds::IterablePriorityQueue<T, Container, Comparator> iterablePriorityQueue_ =
					static_cast<base::workarounds::IterablePriorityQueue<T, Container, Comparator>>(priorityQueue_);
				return writeIterator(iterablePriorityQueue_.begin(), iterablePriorityQueue_.end(), iterablePriorityQueue_.size());
			}
			template <class First, class Second>
			inline MessageBuilder& operator<<(const std::pair<First, Second>& pair_)
			{
				m_logger->stream() << ELPP_LITERAL("(");
				operator << (static_cast<First>(pair_.first));
				m_logger->stream() << ELPP_LITERAL(", ");
				operator << (static_cast<Second>(pair_.second));
				m_logger->stream() << ELPP_LITERAL(")");
				return *this;
			}
			template <std::size_t Size>
			inline MessageBuilder& operator<<(const std::bitset<Size>& bitset_)
			{
				m_logger->stream() << ELPP_LITERAL("[");
				operator << (bitset_.to_string());
				m_logger->stream() << ELPP_LITERAL("]");
				return *this;
			}
#   if defined(ELPP_LOG_STD_ARRAY)
			template <class T, std::size_t Size>
			inline MessageBuilder& operator<<(const std::array<T, Size>& array)
			{
				return writeIterator(array.begin(), array.end(), array.size());
			}
#   endif  // defined(ELPP_LOG_STD_ARRAY)
#   if defined(ELPP_LOG_UNORDERED_MAP)
			ELPP_ITERATOR_CONTAINER_LOG_FIVE_ARG(std::unordered_map)
				ELPP_ITERATOR_CONTAINER_LOG_FIVE_ARG(std::unordered_multimap)
#   endif  // defined(ELPP_LOG_UNORDERED_MAP)
#   if defined(ELPP_LOG_UNORDERED_SET)
				ELPP_ITERATOR_CONTAINER_LOG_FOUR_ARG(std::unordered_set)
				ELPP_ITERATOR_CONTAINER_LOG_FOUR_ARG(std::unordered_multiset)
#   endif  // defined(ELPP_LOG_UNORDERED_SET)
#endif  // defined(ELPP_STL_LOGGING)
#if defined(ELPP_QT_LOGGING)
				inline MessageBuilder& operator<<(const QString& msg)
			{
#   if defined(ELPP_UNICODE)
				m_logger->stream() << msg.toStdWString();
#   else
				m_logger->stream() << msg.toStdString();
#   endif  // defined(ELPP_UNICODE)
				return *this;
			}
			inline MessageBuilder& operator<<(const QByteArray& msg)
			{
				return operator << (QString(msg));
			}
			inline MessageBuilder& operator<<(const QStringRef& msg)
			{
				return operator<<(msg.toString());
			}
			inline MessageBuilder& operator<<(qint64 msg)
			{
#   if defined(ELPP_UNICODE)
				m_logger->stream() << QString::number(msg).toStdWString();
#   else
				m_logger->stream() << QString::number(msg).toStdString();
#   endif  // defined(ELPP_UNICODE)
				return *this;
			}
			inline MessageBuilder& operator<<(quint64 msg)
			{
#   if defined(ELPP_UNICODE)
				m_logger->stream() << QString::number(msg).toStdWString();
#   else
				m_logger->stream() << QString::number(msg).toStdString();
#   endif  // defined(ELPP_UNICODE)
				return *this;
			}
			inline MessageBuilder& operator<<(QChar msg)
			{
				m_logger->stream() << msg.toLatin1();
				return *this;
			}
			inline MessageBuilder& operator<<(const QLatin1String& msg)
			{
				m_logger->stream() << msg.latin1();
				return *this;
			}
			ELPP_ITERATOR_CONTAINER_LOG_ONE_ARG(QList)
				ELPP_ITERATOR_CONTAINER_LOG_ONE_ARG(QVector)
				ELPP_ITERATOR_CONTAINER_LOG_ONE_ARG(QQueue)
				ELPP_ITERATOR_CONTAINER_LOG_ONE_ARG(QSet)
				ELPP_ITERATOR_CONTAINER_LOG_ONE_ARG(QLinkedList)
				ELPP_ITERATOR_CONTAINER_LOG_ONE_ARG(QStack)
				template <typename First, typename Second>
			inline MessageBuilder& operator<<(const QPair<First, Second>& pair_)
			{
				m_logger->stream() << ELPP_LITERAL("(");
				operator << (static_cast<First>(pair_.first));
				m_logger->stream() << ELPP_LITERAL(", ");
				operator << (static_cast<Second>(pair_.second));
				m_logger->stream() << ELPP_LITERAL(")");
				return *this;
			}
			template <typename K, typename V>
			inline MessageBuilder& operator<<(const QMap<K, V>& map_)
			{
				m_logger->stream() << ELPP_LITERAL("[");
				QList<K> keys = map_.keys();
				typename QList<K>::const_iterator begin = keys.begin();
				typename QList<K>::const_iterator end = keys.end();
				int max_ = static_cast<int>(base::consts::kMaxLogPerContainer);  // to prevent warning
				for(int index_ = 0; begin != end && index_ < max_; ++index_, ++begin)
				{
					m_logger->stream() << ELPP_LITERAL("(");
					operator << (static_cast<K>(*begin));
					m_logger->stream() << ELPP_LITERAL(", ");
					operator << (static_cast<V>(map_.value(*begin)));
					m_logger->stream() << ELPP_LITERAL(")");
					m_logger->stream() << ((index_ < keys.size() - 1) ? m_containerLogSeperator : ELPP_LITERAL(""));
				}
				if(begin != end)
				{
					m_logger->stream() << ELPP_LITERAL("...");
				}
				m_logger->stream() << ELPP_LITERAL("]");
				return *this;
			}
			template <typename K, typename V>
			inline MessageBuilder& operator<<(const QMultiMap<K, V>& map_)
			{
				operator << (static_cast<QMap<K, V>>(map_));
				return *this;
			}
			template <typename K, typename V>
			inline MessageBuilder& operator<<(const QHash<K, V>& hash_)
			{
				m_logger->stream() << ELPP_LITERAL("[");
				QList<K> keys = hash_.keys();
				typename QList<K>::const_iterator begin = keys.begin();
				typename QList<K>::const_iterator end = keys.end();
				int max_ = static_cast<int>(base::consts::kMaxLogPerContainer);  // prevent type warning
				for(int index_ = 0; begin != end && index_ < max_; ++index_, ++begin)
				{
					m_logger->stream() << ELPP_LITERAL("(");
					operator << (static_cast<K>(*begin));
					m_logger->stream() << ELPP_LITERAL(", ");
					operator << (static_cast<V>(hash_.value(*begin)));
					m_logger->stream() << ELPP_LITERAL(")");
					m_logger->stream() << ((index_ < keys.size() - 1) ? m_containerLogSeperator : ELPP_LITERAL(""));
				}
				if(begin != end)
				{
					m_logger->stream() << ELPP_LITERAL("...");
				}
				m_logger->stream() << ELPP_LITERAL("]");
				return *this;
			}
			template <typename K, typename V>
			inline MessageBuilder& operator<<(const QMultiHash<K, V>& multiHash_)
			{
				operator << (static_cast<QHash<K, V>>(multiHash_));
				return *this;
			}
#endif  // defined(ELPP_QT_LOGGING)
#if defined(ELPP_BOOST_LOGGING)
			ELPP_ITERATOR_CONTAINER_LOG_TWO_ARG(boost::container::vector)
				ELPP_ITERATOR_CONTAINER_LOG_TWO_ARG(boost::container::stable_vector)
				ELPP_ITERATOR_CONTAINER_LOG_TWO_ARG(boost::container::list)
				ELPP_ITERATOR_CONTAINER_LOG_TWO_ARG(boost::container::deque)
				ELPP_ITERATOR_CONTAINER_LOG_FOUR_ARG(boost::container::map)
				ELPP_ITERATOR_CONTAINER_LOG_FOUR_ARG(boost::container::flat_map)
				ELPP_ITERATOR_CONTAINER_LOG_THREE_ARG(boost::container::set)
				ELPP_ITERATOR_CONTAINER_LOG_THREE_ARG(boost::container::flat_set)
#endif  // defined(ELPP_BOOST_LOGGING)

				/// @brief Macro used internally that can be used externally to make containers easylogging++ friendly
				///
				/// @detail This macro expands to write an ostream& operator<< for container. This container is expected to
				///         have begin() and end() methods that return respective iterators
				/// @param ContainerType Type of container e.g, MyList from WX_DECLARE_LIST(int, MyList); in wxwidgets
				/// @param SizeMethod Method used to get size of container.
				/// @param ElementInstance Instance of element to be fed out. Insance name is "elem". See WXELPP_ENABLED macro
				///        for an example usage
#define MAKE_CONTAINERELPP_FRIENDLY(ContainerType, SizeMethod, ElementInstance) \
    el::base::type::ostream_t& operator<<(el::base::type::ostream_t& ss, const ContainerType& container) {\
        const el::base::type::char_t* sep = ELPP->hasFlag(el::LoggingFlag::NewLineForContainer) ? \
            ELPP_LITERAL("\n    ") : ELPP_LITERAL(", ");\
        ContainerType::const_iterator elem = container.begin();\
        ContainerType::const_iterator endElem = container.end();\
        std::size_t size_ = container.SizeMethod; \
        ss << ELPP_LITERAL("[");\
        for (std::size_t i = 0; elem != endElem && i < el::base::consts::kMaxLogPerContainer; ++i, ++elem) { \
            ss << ElementInstance;\
            ss << ((i < size_ - 1) ? sep : ELPP_LITERAL(""));\
        }\
        if (elem != endElem) {\
            ss << ELPP_LITERAL("...");\
        }\
        ss << ELPP_LITERAL("]");\
        return ss;\
    }
#if defined(ELPP_WXWIDGETS_LOGGING)
				ELPP_ITERATOR_CONTAINER_LOG_ONE_ARG(wxVector)
#   define ELPP_WX_PTR_ENABLED(ContainerType) MAKE_CONTAINERELPP_FRIENDLY(ContainerType, size(), *(*elem))
#   define ELPP_WX_ENABLED(ContainerType) MAKE_CONTAINERELPP_FRIENDLY(ContainerType, size(), (*elem))
#   define ELPP_WX_HASH_MAP_ENABLED(ContainerType) MAKE_CONTAINERELPP_FRIENDLY(ContainerType, size(), \
        ELPP_LITERAL("(") << elem->first << ELPP_LITERAL(", ") << elem->second << ELPP_LITERAL(")")
#else
#   define ELPP_WX_PTR_ENABLED(ContainerType)
#   define ELPP_WX_ENABLED(ContainerType)
#   define ELPP_WX_HASH_MAP_ENABLED(ContainerType)
#endif  // defined(ELPP_WXWIDGETS_LOGGING)
	// Other classes
	template <class Class>
			ELPP_SIMPLE_LOG(const Class&)
#undef ELPP_SIMPLE_LOG
#undef ELPP_ITERATOR_CONTAINER_LOG_ONE_ARG
#undef ELPP_ITERATOR_CONTAINER_LOG_TWO_ARG
#undef ELPP_ITERATOR_CONTAINER_LOG_THREE_ARG
#undef ELPP_ITERATOR_CONTAINER_LOG_FOUR_ARG
#undef ELPP_ITERATOR_CONTAINER_LOG_FIVE_ARG
		private:
			Logger* m_logger;
			const base::type::char_t* m_containerLogSeperator;

			template<class Iterator>
			inline MessageBuilder& writeIterator(Iterator begin_, Iterator end_, std::size_t size_)
			{
				m_logger->stream() << ELPP_LITERAL("[");
				for(std::size_t i = 0; begin_ != end_ && i < base::consts::kMaxLogPerContainer; ++i, ++begin_)
				{
					operator << (*begin_);
					m_logger->stream() << ((i < size_ - 1) ? m_containerLogSeperator : ELPP_LITERAL(""));
				}
				if(begin_ != end_)
				{
					m_logger->stream() << ELPP_LITERAL("...");
				}
				m_logger->stream() << ELPP_LITERAL("]");
				if(ELPP->hasFlag(LoggingFlag::AutoSpacing))
				{
					m_logger->stream() << " ";
				}
				return *this;
			}
		};
		/// @brief Writes nothing - Used when certain log is disabled
		class NullWriter : base::NoCopy
		{
		public:
			NullWriter(void)
			{
			}

			// Null manipulator
			inline NullWriter& operator<<(std::ostream& (*)(std::ostream&))
			{
				return *this;
			}

			template <typename T>
			inline NullWriter& operator<<(const T&)
			{
				return *this;
			}
		};
		/// @brief Main entry point of each logging
		class Writer : base::NoCopy
		{
		public:
			Writer(Level level, const char* file, unsigned long int line,
					   const char* func, base::DispatchAction dispatchAction = base::DispatchAction::NormalLog,
					   base::type::VerboseLevel verboseLevel = 0) :
				m_level(level), m_file(file), m_line(line), m_func(func), m_verboseLevel(verboseLevel),
				m_proceed(false), m_dispatchAction(dispatchAction)
			{
			}

			virtual ~Writer(void)
			{
				processDispatch();
			}

			template <typename T>
			inline Writer& operator<<(const T& log)
			{
#if ELPP_LOGGING_ENABLED
				if(m_proceed)
				{
					m_messageBuilder << log;
				}
#endif  // ELPP_LOGGING_ENABLED
				return *this;
			}

			inline Writer& operator<<(std::ostream& (*log)(std::ostream&))
			{
#if ELPP_LOGGING_ENABLED
				if(m_proceed)
				{
					m_messageBuilder << log;
				}
#endif  // ELPP_LOGGING_ENABLED
				return *this;
			}

			Writer& construct(Logger* logger, bool needLock = true)
			{
				m_logger = logger;
				initializeLogger(logger->id(), false, needLock);
				m_messageBuilder.initialize(m_logger);
				return *this;
			}

			Writer& construct(int count, const char* loggerIds, ...)
			{
				if(ELPP->hasFlag(LoggingFlag::MultiLoggerSupport))
				{
					va_list loggersList;
					va_start(loggersList, loggerIds);
					const char* id = loggerIds;
					for(int i = 0; i < count; ++i)
					{
						m_loggerIds.push_back(std::string(id));
						id = va_arg(loggersList, const char*);
					}
					va_end(loggersList);
					initializeLogger(m_loggerIds.at(0));
				}
				else
				{
					initializeLogger(std::string(loggerIds));
				}
				m_messageBuilder.initialize(m_logger);
				return *this;
			}
		protected:
			Level m_level;
			const char* m_file;
			const unsigned long int m_line;
			const char* m_func;
			base::type::VerboseLevel m_verboseLevel;
			Logger* m_logger;
			bool m_proceed;
			base::MessageBuilder m_messageBuilder;
			base::DispatchAction m_dispatchAction;
			std::vector<std::string> m_loggerIds;
			friend class el::Helpers;

			void initializeLogger(const std::string& loggerId, bool lookup = true, bool needLock = true)
			{
				if(lookup)
				{
					m_logger = ELPP->registeredLoggers()->get(loggerId, ELPP->hasFlag(LoggingFlag::CreateLoggerAutomatically));
				}
				if(m_logger == nullptr)
				{
					ELPP->acquireLock();
					if(!ELPP->registeredLoggers()->has(std::string(base::consts::kDefaultLoggerId)))
					{
						// Somehow default logger has been unregistered. Not good! Register again
						ELPP->registeredLoggers()->get(std::string(base::consts::kDefaultLoggerId));
					}
					ELPP->releaseLock();  // Need to unlock it for next writer
					Writer(Level::Debug, m_file, m_line, m_func).construct(1, base::consts::kDefaultLoggerId)
						<< "Logger [" << loggerId << "] is not registered yet!";
					m_proceed = false;
				}
				else
				{
					if(needLock)
					{
						m_logger->acquireLock();  // This should not be unlocked by checking m_proceed because
												  // m_proceed can be changed by lines below
					}
					if(ELPP->hasFlag(LoggingFlag::HierarchicalLogging))
					{
						m_proceed = m_level == Level::Verbose ? m_logger->enabled(m_level) :
							LevelHelper::castToInt(m_level) >= LevelHelper::castToInt(ELPP->m_loggingLevel);
					}
					else
					{
						m_proceed = m_logger->enabled(m_level);
					}
				}
			}

			void processDispatch()
			{
#if ELPP_LOGGING_ENABLED
				if(ELPP->hasFlag(LoggingFlag::MultiLoggerSupport))
				{
					bool firstDispatched = false;
					base::type::string_t logMessage;
					std::size_t i = 0;
					do
					{
						if(m_proceed)
						{
							if(firstDispatched)
							{
								m_logger->stream() << logMessage;
							}
							else
							{
								firstDispatched = true;
								if(m_loggerIds.size() > 1)
								{
									logMessage = m_logger->stream().str();
								}
							}
							triggerDispatch();
						}
						else if(m_logger != nullptr)
						{
							m_logger->stream().str(ELPP_LITERAL(""));
							m_logger->releaseLock();
						}
						if(i + 1 < m_loggerIds.size())
						{
							initializeLogger(m_loggerIds.at(i + 1));
						}
					} while(++i < m_loggerIds.size());
				}
				else
				{
					if(m_proceed)
					{
						triggerDispatch();
					}
					else if(m_logger != nullptr)
					{
						m_logger->stream().str(ELPP_LITERAL(""));
						m_logger->releaseLock();
					}
				}
#else
				if(m_logger != nullptr)
				{
					m_logger->stream().str(ELPP_LITERAL(""));
					m_logger->releaseLock();
				}
#endif // ELPP_LOGGING_ENABLED
			}

			void triggerDispatch(void)
			{
				if(m_proceed)
				{
					base::LogDispatcher(m_proceed, LogMessage(m_level, m_file, m_line, m_func, m_verboseLevel,
										m_logger), m_dispatchAction).dispatch();
				}
				if(m_logger != nullptr)
				{
					m_logger->stream().str(ELPP_LITERAL(""));
					m_logger->releaseLock();
				}
				if(m_proceed && m_level == Level::Fatal
						&& !ELPP->hasFlag(LoggingFlag::DisableApplicationAbortOnFatalLog))
				{
					base::Writer(Level::Warning, m_file, m_line, m_func).construct(1, base::consts::kDefaultLoggerId)
						<< "Aborting application. Reason: Fatal log at [" << m_file << ":" << m_line << "]";
					std::stringstream reasonStream;
					reasonStream << "Fatal log at [" << m_file << ":" << m_line << "]"
						<< " If you wish to disable 'abort on fatal log' please use "
						<< "el::Helpers::addFlag(el::LoggingFlag::DisableApplicationAbortOnFatalLog)";
					base::utils::abort(1, reasonStream.str());
				}
				m_proceed = false;
			}
		};
		class PErrorWriter : public base::Writer
		{
		public:
			PErrorWriter(Level level, const char* file, unsigned long int line,
					   const char* func, base::DispatchAction dispatchAction = base::DispatchAction::NormalLog,
					   base::type::VerboseLevel verboseLevel = 0) :
				base::Writer(level, file, line, func, dispatchAction, verboseLevel)
			{
			}

			virtual ~PErrorWriter(void)
			{
				if(m_proceed)
				{
#if ELPP_COMPILER_MSVC
					char buff[256];
					strerror_s(buff, 256, errno);
					m_logger->stream() << ": " << buff << " [" << errno << "]";
#else
					m_logger->stream() << ": " << strerror(errno) << " [" << errno << "]";
#endif
				}
			}
		};
	}  // namespace base
	// Logging from Logger class. Why this is here? Because we have Storage and Writer class available
#if ELPP_VARIADIC_TEMPLATES_SUPPORTED
	template <typename T, typename... Args>
	void Logger::log_(Level level, int vlevel, const char* s, const T& value, const Args&... args)
	{
		base::MessageBuilder b;
		b.initialize(this);
		while(*s)
		{
			if(*s == base::consts::kFormatSpecifierChar)
			{
				if(*(s + 1) == base::consts::kFormatSpecifierChar)
				{
					++s;
				}
				else
				{
					if(*(s + 1) == base::consts::kFormatSpecifierCharValue)
					{
						++s;
						b << value;
						log_(level, vlevel, ++s, args...);
						return;
					}
				}
			}
			b << *s++;
		}
		ELPP_INTERNAL_ERROR("Too many arguments provided. Unable to handle. Please provide more format specifiers", false);
	}
	template <typename T>
	inline void Logger::log_(Level level, int vlevel, const T& log)
	{
		if(level == Level::Verbose)
		{
			if(ELPP->vRegistry()->allowed(vlevel, __FILE__))
			{
				base::Writer(Level::Verbose, "FILE", 0, "FUNCTION",
					base::DispatchAction::NormalLog, vlevel).construct(this, false) << log;
			}
			else
			{
				stream().str(ELPP_LITERAL(""));
			}
		}
		else
		{
			base::Writer(level, "FILE", 0, "FUNCTION").construct(this, false) << log;
		}
	}
	template <typename T, typename... Args>
	void Logger::log(Level level, const char* s, const T& value, const Args&... args)
	{
		base::threading::ScopedLock scopedLock(lock());
		log_(level, 0, s, value, args...);
	}
	template <typename T>
	inline void Logger::log(Level level, const T& log)
	{
		base::threading::ScopedLock scopedLock(lock());
		log_(level, 0, log);
	}
#   if ELPP_VERBOSE_LOG
	template <typename T, typename... Args>
	inline void Logger::verbose(int vlevel, const char* s, const T& value, const Args&... args)
	{
		base::threading::ScopedLock scopedLock(lock());
		log_(el::Level::Verbose, vlevel, s, value, args...);
	}
	template <typename T>
	inline void Logger::verbose(int vlevel, const T& log)
	{
		base::threading::ScopedLock scopedLock(lock());
		log_(el::Level::Verbose, vlevel, log);
	}
#   else
	template <typename T, typename... Args>
	inline void Logger::verbose(int, const char*, const T&, const Args&...)
	{
		return;
	}
	template <typename T>
	inline void Logger::verbose(int, const T&)
	{
		return;
	}
#   endif  // ELPP_VERBOSE_LOG
#   define LOGGER_LEVEL_WRITERS(FUNCTION_NAME, LOG_LEVEL)\
    template <typename T, typename... Args>\
    inline void Logger::FUNCTION_NAME(const char* s, const T& value, const Args&... args) {\
        log(LOG_LEVEL, s, value, args...);\
    }\
    template <typename T>\
    inline void Logger::FUNCTION_NAME(const T& value) {\
        log(LOG_LEVEL, value);\
    }
#   define LOGGER_LEVEL_WRITERS_DISABLED(FUNCTION_NAME, LOG_LEVEL)\
    template <typename T, typename... Args>\
    inline void Logger::FUNCTION_NAME(const char*, const T&, const Args&...) {\
        return;\
    }\
    template <typename T>\
    inline void Logger::FUNCTION_NAME(const T&) {\
        return;\
    }

#   if ELPP_INFO_LOG
	LOGGER_LEVEL_WRITERS(info, Level::Info)
#   else
	LOGGER_LEVEL_WRITERS_DISABLED(info, Level::Info)
#   endif // ELPP_INFO_LOG
#   if ELPP_DEBUG_LOG
		LOGGER_LEVEL_WRITERS(debug, Level::Debug)
#   else
		LOGGER_LEVEL_WRITERS_DISABLED(debug, Level::Debug)
#   endif // ELPP_DEBUG_LOG
#   if ELPP_WARNING_LOG
		LOGGER_LEVEL_WRITERS(warn, Level::Warning)
#   else
		LOGGER_LEVEL_WRITERS_DISABLED(warn, Level::Warning)
#   endif // ELPP_WARNING_LOG
#   if ELPP_ERROR_LOG
		LOGGER_LEVEL_WRITERS(error, Level::Error)
#   else
		LOGGER_LEVEL_WRITERS_DISABLED(error, Level::Error)
#   endif // ELPP_ERROR_LOG
#   if ELPP_FATAL_LOG
		LOGGER_LEVEL_WRITERS(fatal, Level::Fatal)
#   else
		LOGGER_LEVEL_WRITERS_DISABLED(fatal, Level::Fatal)
#   endif // ELPP_FATAL_LOG
#   if ELPP_TRACE_LOG
		LOGGER_LEVEL_WRITERS(trace, Level::Trace)
#   else
		LOGGER_LEVEL_WRITERS_DISABLED(trace, Level::Trace)
#   endif // ELPP_TRACE_LOG
#   undef LOGGER_LEVEL_WRITERS
#   undef LOGGER_LEVEL_WRITERS_DISABLED
#endif // ELPP_VARIADIC_TEMPLATES_SUPPORTED
#if ELPP_COMPILER_MSVC
#   define ELPP_VARIADIC_FUNC_MSVC(variadicFunction, variadicArgs) variadicFunction variadicArgs
#   define ELPP_VARIADIC_FUNC_MSVC_RUN(variadicFunction, ...) ELPP_VARIADIC_FUNC_MSVC(variadicFunction, (__VA_ARGS__))
#   define el_getVALength(...) ELPP_VARIADIC_FUNC_MSVC_RUN(el_resolveVALength, 0, ## __VA_ARGS__,\
       10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0)
#else
#   if ELPP_COMPILER_CLANG
#      define el_getVALength(...) el_resolveVALength(0, __VA_ARGS__, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0)
#   else
#      define el_getVALength(...) el_resolveVALength(0, ## __VA_ARGS__, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0)
#   endif // ELPP_COMPILER_CLANG
#endif // ELPP_COMPILER_MSVC
#define el_resolveVALength(_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, N, ...) N
#define ELPP_WRITE_LOG(writer, level, dispatchAction, ...) \
    writer(level, __FILE__, __LINE__, ELPP_FUNC, dispatchAction).construct(el_getVALength(__VA_ARGS__), __VA_ARGS__)
#define ELPP_WRITE_LOG_IF(writer, condition, level, dispatchAction, ...) if (condition) \
    writer(level, __FILE__, __LINE__, ELPP_FUNC, dispatchAction).construct(el_getVALength(__VA_ARGS__), __VA_ARGS__)
#define ELPP_WRITE_LOG_EVERY_N(writer, occasion, level, dispatchAction, ...) \
    if (ELPP->validateEveryNCounter(__FILE__, __LINE__, occasion)) \
        writer(level, __FILE__, __LINE__, ELPP_FUNC, dispatchAction).construct(el_getVALength(__VA_ARGS__), __VA_ARGS__)
#define ELPP_WRITE_LOG_AFTER_N(writer, n, level, dispatchAction, ...) \
    if (ELPP->validateAfterNCounter(__FILE__, __LINE__, n)) \
        writer(level, __FILE__, __LINE__, ELPP_FUNC, dispatchAction).construct(el_getVALength(__VA_ARGS__), __VA_ARGS__)
#define ELPP_WRITE_LOG_N_TIMES(writer, n, level, dispatchAction, ...) \
    if (ELPP->validateNTimesCounter(__FILE__, __LINE__, n)) \
        writer(level, __FILE__, __LINE__, ELPP_FUNC, dispatchAction).construct(el_getVALength(__VA_ARGS__), __VA_ARGS__)
#undef ELPP_CURR_FILE_PERFORMANCE_LOGGER
#if defined(ELPP_PERFORMANCE_LOGGER)
#   define ELPP_CURR_FILE_PERFORMANCE_LOGGER ELPP_PERFORMANCE_LOGGER
#else
#   define ELPP_CURR_FILE_PERFORMANCE_LOGGER el::base::consts::kPerformanceLoggerId
#endif
		class PerformanceTrackingData
	{
	public:
		enum class DataType : base::type::EnumType
		{
			Checkpoint = 1, Complete = 2
		};
		// Do not use constructor, will run into multiple definition error, use init(PerformanceTracker*)
		explicit PerformanceTrackingData(DataType dataType) : m_performanceTracker(nullptr),
			m_dataType(dataType), m_file(""), m_line(0), m_func("")
		{
		}
		inline const std::string* blockName(void) const;
		inline const struct timeval* startTime(void) const;
		inline const struct timeval* endTime(void) const;
		inline const struct timeval* lastCheckpointTime(void) const;
		inline const base::PerformanceTracker* performanceTracker(void) const
		{
			return m_performanceTracker;
		}
		inline PerformanceTrackingData::DataType dataType(void) const
		{
			return m_dataType;
		}
		inline bool firstCheckpoint(void) const
		{
			return m_firstCheckpoint;
		}
		inline std::string checkpointId(void) const
		{
			return m_checkpointId;
		}
		inline const char* file(void) const
		{
			return m_file;
		}
		inline unsigned long int line(void) const
		{
			return m_line;
		}
		inline const char* func(void) const
		{
			return m_func;
		}
		inline const base::type::string_t* formattedTimeTaken() const
		{
			return &m_formattedTimeTaken;
		}
		inline const std::string& loggerId(void) const;
	private:
		base::PerformanceTracker* m_performanceTracker;
		base::type::string_t m_formattedTimeTaken;
		PerformanceTrackingData::DataType m_dataType;
		bool m_firstCheckpoint;
		std::string m_checkpointId;
		const char* m_file;
		unsigned long int m_line;
		const char* m_func;
		inline void init(base::PerformanceTracker* performanceTracker, bool firstCheckpoint = false)
		{
			m_performanceTracker = performanceTracker;
			m_firstCheckpoint = firstCheckpoint;
		}

		friend class el::base::PerformanceTracker;
	};
	namespace base {
		/// @brief Represents performanceTracker block of code that conditionally adds performance status to log
		///        either when goes outside the scope of when checkpoint() is called
		class PerformanceTracker : public base::threading::ThreadSafe, public Loggable
		{
		public:
			PerformanceTracker(const std::string& blockName,
					base::TimestampUnit timestampUnit = base::TimestampUnit::Millisecond,
					const std::string& loggerId = std::string(ELPP_CURR_FILE_PERFORMANCE_LOGGER),
					bool scopedLog = true, Level level = base::consts::kPerformanceTrackerDefaultLevel) :
				m_blockName(blockName), m_timestampUnit(timestampUnit), m_loggerId(loggerId), m_scopedLog(scopedLog),
				m_level(level), m_hasChecked(false), m_lastCheckpointId(std::string()), m_enabled(false)
			{
#if !defined(ELPP_DISABLE_PERFORMANCE_TRACKING) && ELPP_LOGGING_ENABLED
				// We store it locally so that if user happen to change configuration by the end of scope
				// or before calling checkpoint, we still depend on state of configuraton at time of construction
				el::Logger* loggerPtr = ELPP->registeredLoggers()->get(loggerId, false);
				m_enabled = loggerPtr != nullptr && loggerPtr->m_typedConfigurations->performanceTracking(m_level);
				if(m_enabled)
				{
					base::utils::DateTime::gettimeofday(&m_startTime);
				}
#endif  // !defined(ELPP_DISABLE_PERFORMANCE_TRACKING) && ELPP_LOGGING_ENABLED
			}
			/// @brief Copy constructor
			PerformanceTracker(const PerformanceTracker& t) :
				m_blockName(t.m_blockName), m_timestampUnit(t.m_timestampUnit), m_loggerId(t.m_loggerId), m_scopedLog(t.m_scopedLog),
				m_level(t.m_level), m_hasChecked(t.m_hasChecked), m_lastCheckpointId(t.m_lastCheckpointId), m_enabled(t.m_enabled),
				m_startTime(t.m_startTime), m_endTime(t.m_endTime), m_lastCheckpointTime(t.m_lastCheckpointTime)
			{
			}
			virtual ~PerformanceTracker(void)
			{
#if !defined(ELPP_DISABLE_PERFORMANCE_TRACKING) && ELPP_LOGGING_ENABLED
				if(m_enabled)
				{
					base::threading::ScopedLock scopedLock(lock());
					if(m_scopedLog)
					{
						base::utils::DateTime::gettimeofday(&m_endTime);
						base::type::string_t formattedTime = getFormattedTimeTaken();
						PerformanceTrackingData data(PerformanceTrackingData::DataType::Complete);
						data.init(this);
						data.m_formattedTimeTaken = formattedTime;
						PerformanceTrackingCallback* callback = nullptr;
						for(const std::pair<std::string, base::type::PerformanceTrackingCallbackPtr>& h
								: ELPP->m_performanceTrackingCallbacks)
						{
							callback = h.second.get();
							if(callback != nullptr && callback->enabled())
							{
								callback->acquireLock();
								callback->handle(&data);
								callback->releaseLock();
							}
						}
					}
				}
#endif  // !defined(ELPP_DISABLE_PERFORMANCE_TRACKING)
			}
			/// @brief A checkpoint for current performanceTracker block.
			void checkpoint(const std::string& id = std::string(), const char* file = __FILE__, unsigned long int line = __LINE__, const char* func = "")
			{
#if !defined(ELPP_DISABLE_PERFORMANCE_TRACKING) && ELPP_LOGGING_ENABLED
				if(m_enabled)
				{
					base::threading::ScopedLock scopedLock(lock());
					base::utils::DateTime::gettimeofday(&m_endTime);
					base::type::string_t formattedTime = m_hasChecked ? getFormattedTimeTaken(m_lastCheckpointTime) : ELPP_LITERAL("");
					PerformanceTrackingData data(PerformanceTrackingData::DataType::Checkpoint);
					data.init(this);
					data.m_checkpointId = id;
					data.m_file = file;
					data.m_line = line;
					data.m_func = func;
					data.m_formattedTimeTaken = formattedTime;
					PerformanceTrackingCallback* callback = nullptr;
					for(const std::pair<std::string, base::type::PerformanceTrackingCallbackPtr>& h
							: ELPP->m_performanceTrackingCallbacks)
					{
						callback = h.second.get();
						if(callback != nullptr && callback->enabled())
						{
							callback->acquireLock();
							callback->handle(&data);
							callback->releaseLock();
						}
					}
					base::utils::DateTime::gettimeofday(&m_lastCheckpointTime);
					m_hasChecked = true;
					m_lastCheckpointId = id;
				}
#endif  // !defined(ELPP_DISABLE_PERFORMANCE_TRACKING) && ELPP_LOGGING_ENABLED
				ELPP_UNUSED(id);
				ELPP_UNUSED(file);
				ELPP_UNUSED(line);
				ELPP_UNUSED(func);
			}
			inline Level level(void) const
			{
				return m_level;
			}
		private:
			std::string m_blockName;
			base::TimestampUnit m_timestampUnit;
			std::string m_loggerId;
			bool m_scopedLog;
			Level m_level;
			bool m_hasChecked;
			std::string m_lastCheckpointId;
			bool m_enabled;
			struct timeval m_startTime, m_endTime, m_lastCheckpointTime;

			PerformanceTracker(void);

			friend class el::PerformanceTrackingData;
			friend class base::DefaultPerformanceTrackingCallback;

			const inline base::type::string_t getFormattedTimeTaken() const
			{
				return getFormattedTimeTaken(m_startTime);
			}

			const base::type::string_t getFormattedTimeTaken(struct timeval startTime) const
			{
				if(ELPP->hasFlag(LoggingFlag::FixedTimeFormat))
				{
					base::type::stringstream_t ss;
					ss << base::utils::DateTime::getTimeDifference(m_endTime,
						startTime, m_timestampUnit) << " " << base::consts::kTimeFormats[static_cast<base::type::EnumType>(m_timestampUnit)].unit;
					return ss.str();
				}
				return base::utils::DateTime::formatTime(base::utils::DateTime::getTimeDifference(m_endTime,
														 startTime, m_timestampUnit), m_timestampUnit);
			}

			virtual inline void log(el::base::type::ostream_t& os) const
			{
				os << getFormattedTimeTaken();
			}
		};
		class DefaultPerformanceTrackingCallback : public PerformanceTrackingCallback
		{
		protected:
			void handle(const PerformanceTrackingData* data)
			{
				m_data = data;
				base::type::stringstream_t ss;
				if(m_data->dataType() == PerformanceTrackingData::DataType::Complete)
				{
					ss << ELPP_LITERAL("Executed [") << m_data->blockName()->c_str() << ELPP_LITERAL("] in [") << *m_data->formattedTimeTaken() << ELPP_LITERAL("]");
				}
				else
				{
					ss << ELPP_LITERAL("Performance checkpoint");
					if(!m_data->checkpointId().empty())
					{
						ss << ELPP_LITERAL(" [") << m_data->checkpointId().c_str() << ELPP_LITERAL("]");
					}
					ss << ELPP_LITERAL(" for block [") << m_data->blockName()->c_str() << ELPP_LITERAL("] : [") << *m_data->performanceTracker();
					if(!ELPP->hasFlag(LoggingFlag::DisablePerformanceTrackingCheckpointComparison) && m_data->performanceTracker()->m_hasChecked)
					{
						ss << ELPP_LITERAL(" ([") << *m_data->formattedTimeTaken() << ELPP_LITERAL("] from ");
						if(m_data->performanceTracker()->m_lastCheckpointId.empty())
						{
							ss << ELPP_LITERAL("last checkpoint");
						}
						else
						{
							ss << ELPP_LITERAL("checkpoint '") << m_data->performanceTracker()->m_lastCheckpointId.c_str() << ELPP_LITERAL("'");
						}
						ss << ELPP_LITERAL(")]");
					}
					else
					{
						ss << ELPP_LITERAL("]");
					}
				}
				el::base::Writer(m_data->performanceTracker()->level(), m_data->file(), m_data->line(), m_data->func()).construct(1, m_data->loggerId().c_str()) << ss.str();
			}
		private:
			const PerformanceTrackingData* m_data;
		};
	}  // namespace base
	inline const std::string* PerformanceTrackingData::blockName() const
	{
		return const_cast<const std::string*>(&m_performanceTracker->m_blockName);
	}
	inline const struct timeval* PerformanceTrackingData::startTime() const
	{
		return const_cast<const struct timeval*>(&m_performanceTracker->m_startTime);
	}
	inline const struct timeval* PerformanceTrackingData::endTime() const
	{
		return const_cast<const struct timeval*>(&m_performanceTracker->m_endTime);
	}
	inline const struct timeval* PerformanceTrackingData::lastCheckpointTime() const
	{
		return const_cast<const struct timeval*>(&m_performanceTracker->m_lastCheckpointTime);
	}
	inline const std::string& PerformanceTrackingData::loggerId(void) const
	{
		return m_performanceTracker->m_loggerId;
	}
	namespace base {
		/// @brief Contains some internal debugging tools like crash handler and stack tracer
		namespace debug {
			class StackTrace : base::NoCopy
			{
			public:
				static const std::size_t kMaxStack = 64;
				static const std::size_t kStackStart = 2;  // We want to skip c'tor and StackTrace::generateNew()
				class StackTraceEntry
				{
				public:
					StackTraceEntry(std::size_t index, const char* loc, const char* demang, const char* hex, const char* addr)
					{
						m_index = index;
						m_location = std::string(loc);
						m_demangled = std::string(demang);
						m_hex = std::string(hex);
						m_addr = std::string(addr);
					}
					StackTraceEntry(std::size_t index, char* loc)
					{
						m_index = index;
						m_location = std::string(loc);
					}
					std::size_t m_index;
					std::string m_location;
					std::string m_demangled;
					std::string m_hex;
					std::string m_addr;
					friend std::ostream& operator<<(std::ostream& ss, const StackTraceEntry& si)
					{
						ss << "[" << si.m_index << "] " << si.m_location << (si.m_demangled.empty() ? "" : ":") << si.m_demangled
							<< (si.m_hex.empty() ? "" : "+") << si.m_hex << si.m_addr;
						return ss;
					}

				private:
					StackTraceEntry(void);
				};

				StackTrace(void)
				{
					generateNew();
				}

				virtual ~StackTrace(void)
				{
				}

				inline std::vector<StackTraceEntry>& getLatestStack(void)
				{
					return m_stack;
				}

				friend inline std::ostream& operator<<(std::ostream& os, const StackTrace& st)
				{
					std::vector<StackTraceEntry>::const_iterator it = st.m_stack.begin();
					while(it != st.m_stack.end())
					{
						os << "    " << *it++ << "\n";
					}
					return os;
				}

			private:
				std::vector<StackTraceEntry> m_stack;

				void generateNew(void)
				{
#if ELPP_STACKTRACE
					m_stack.clear();
					void* stack[kMaxStack];
					std::size_t size = backtrace(stack, kMaxStack);
					char** strings = backtrace_symbols(stack, size);
					if(size > kStackStart)
					{  // Skip StackTrace c'tor and generateNew
						for(std::size_t i = kStackStart; i < size; ++i)
						{
							char* mangName = nullptr;
							char* hex = nullptr;
							char* addr = nullptr;
							for(char* c = strings[i]; *c; ++c)
							{
								switch(*c)
								{
								case '(':
								mangName = c;
								break;
								case '+':
								hex = c;
								break;
								case ')':
								addr = c;
								break;
								}
							}
							// Perform demangling if parsed properly
							if(mangName != nullptr && hex != nullptr && addr != nullptr && mangName < hex)
							{
								*mangName++ = '\0';
								*hex++ = '\0';
								*addr++ = '\0';
								int status = 0;
								char* demangName = abi::__cxa_demangle(mangName, 0, 0, &status);
								// if demangling is successful, output the demangled function name
								if(status == 0)
								{
									// Success (see http://gcc.gnu.org/onlinedocs/libstdc++/libstdc++-html-USERS-4.3/a01696.html)
									StackTraceEntry entry(i - 1, strings[i], demangName, hex, addr);
									m_stack.push_back(entry);
								}
								else
								{
									// Not successful - we will use mangled name
									StackTraceEntry entry(i - 1, strings[i], mangName, hex, addr);
									m_stack.push_back(entry);
								}
								free(demangName);
							}
							else
							{
								StackTraceEntry entry(i - 1, strings[i]);
								m_stack.push_back(entry);
							}
						}
					}
					free(strings);
#else
					ELPP_INTERNAL_INFO(1, "Stacktrace generation not supported for selected compiler");
#endif  // ELPP_STACKTRACE
				}
			};
			static std::string crashReason(int sig)
			{
				std::stringstream ss;
				bool foundReason = false;
				for(int i = 0; i < base::consts::kCrashSignalsCount; ++i)
				{
					if(base::consts::kCrashSignals[i].numb == sig)
					{
						ss << "Application has crashed due to [" << base::consts::kCrashSignals[i].name << "] signal";
						if(ELPP->hasFlag(el::LoggingFlag::LogDetailedCrashReason))
						{
							ss << std::endl <<
								"    " << base::consts::kCrashSignals[i].brief << std::endl <<
								"    " << base::consts::kCrashSignals[i].detail;
						}
						foundReason = true;
					}
				}
				if(!foundReason)
				{
					ss << "Application has crashed due to unknown signal [" << sig << "]";
				}
				return ss.str();
			}
			/// @brief Logs reason of crash from sig
			static void logCrashReason(int sig, bool stackTraceIfAvailable, Level level, const char* logger)
			{
				std::stringstream ss;
				ss << "CRASH HANDLED; ";
				ss << crashReason(sig);
#if ELPP_STACKTRACE
				if(stackTraceIfAvailable)
				{
					ss << std::endl << "    ======= Backtrace: =========" << std::endl << base::debug::StackTrace();
				}
#else
				ELPP_UNUSED(stackTraceIfAvailable);
#endif  // ELPP_STACKTRACE
				ELPP_WRITE_LOG(el::base::Writer, level, base::DispatchAction::NormalLog, logger) << ss.str();
			}
			static inline void crashAbort(int sig)
			{
				base::utils::abort(sig);
			}
			/// @brief Default application crash handler
			///
			/// @detail This function writes log using 'default' logger, prints stack trace for GCC based compilers and aborts program.
			static inline void defaultCrashHandler(int sig)
			{
				base::debug::logCrashReason(sig, true, Level::Fatal, base::consts::kDefaultLoggerId);
				base::debug::crashAbort(sig);
			}
			/// @brief Handles unexpected crashes
			class CrashHandler : base::NoCopy
			{
			public:
				typedef void (*Handler)(int);

				explicit CrashHandler(bool useDefault)
				{
					if(useDefault)
					{
						setHandler(defaultCrashHandler);
					}
				}
				explicit CrashHandler(const Handler& cHandler)
				{
					setHandler(cHandler);
				}
				void setHandler(const Handler& cHandler)
				{
					m_handler = cHandler;
#if defined(ELPP_HANDLE_SIGABRT)
					int i = 0;  // SIGABRT is at base::consts::kCrashSignals[0]
#else
					int i = 1;
#endif  // defined(ELPP_HANDLE_SIGABRT)
					for(; i < base::consts::kCrashSignalsCount; ++i)
					{
						m_handler = signal(base::consts::kCrashSignals[i].numb, cHandler);
					}
				}

			private:
				Handler m_handler;
			};
		}  // namespace debug
	}  // namespace base
	extern base::debug::CrashHandler elCrashHandler;
#define MAKE_LOGGABLE(ClassType, ClassInstance, OutputStreamInstance) \
    el::base::type::ostream_t& operator<<(el::base::type::ostream_t& OutputStreamInstance, const ClassType& ClassInstance)
	/// @brief Initializes syslog with process ID, options and facility. calls closelog() on d'tor
	class SysLogInitializer
	{
	public:
		SysLogInitializer(const char* processIdent, int options = 0, int facility = 0)
		{
#if defined(ELPP_SYSLOG)
			openlog(processIdent, options, facility);
#else
			ELPP_UNUSED(processIdent);
			ELPP_UNUSED(options);
			ELPP_UNUSED(facility);
#endif  // defined(ELPP_SYSLOG)
		}
		virtual ~SysLogInitializer(void)
		{
#if defined(ELPP_SYSLOG)
			closelog();
#endif  // defined(ELPP_SYSLOG)
		}
	};
#define ELPP_INITIALIZE_SYSLOG(id, opt, fac) el::SysLogInitializer elSyslogInit(id, opt, fac)
	/// @brief Static helpers for developers
	class Helpers : base::StaticClass
	{
	public:
		/// @brief Shares logging repository (base::Storage)
		static inline void setStorage(base::type::StoragePointer storage)
		{
			ELPP = storage;
		}
		/// @return Main storage repository
		static inline base::type::StoragePointer storage()
		{
			return ELPP;
		}
		/// @brief Sets application arguments and figures out whats active for logging and whats not.
		static inline void setArgs(int argc, char** argv)
		{
			ELPP->setApplicationArguments(argc, argv);
		}
		/// @copydoc setArgs(int argc, char** argv)
		static inline void setArgs(int argc, const char** argv)
		{
			ELPP->setApplicationArguments(argc, const_cast<char**>(argv));
		}
		/// @brief Overrides default crash handler and installs custom handler.
		/// @param crashHandler A functor with no return type that takes single int argument.
		///        Handler is a typedef with specification: void (*Handler)(int)
		static inline void setCrashHandler(const el::base::debug::CrashHandler::Handler& crashHandler)
		{
			el::elCrashHandler.setHandler(crashHandler);
		}
		/// @brief Abort due to crash with signal in parameter
		/// @param sig Crash signal
		static inline void crashAbort(int sig, const char* sourceFile = "", unsigned int long line = 0)
		{
			std::stringstream ss;
			ss << base::debug::crashReason(sig).c_str();
			ss << " - [Called el::Helpers::crashAbort(" << sig << ")]";
			if(sourceFile != nullptr && strlen(sourceFile) > 0)
			{
				ss << " - Source: " << sourceFile;
				if(line > 0)
					ss << ":" << line;
				else
					ss << " (line number not specified)";
			}
			base::utils::abort(sig, ss.str());
		}
		/// @brief Logs reason of crash as per sig
		/// @param sig Crash signal
		/// @param stackTraceIfAvailable Includes stack trace if available
		/// @param level Logging level
		/// @param logger Logger to use for logging
		static inline void logCrashReason(int sig, bool stackTraceIfAvailable = false,
				Level level = Level::Fatal, const char* logger = base::consts::kDefaultLoggerId)
		{
			el::base::debug::logCrashReason(sig, stackTraceIfAvailable, level, logger);
		}
		/// @brief Installs pre rollout callback, this callback is triggered when log file is about to be rolled out
		///        (can be useful for backing up)
		static inline void installPreRollOutCallback(const PreRollOutCallback& callback)
		{
			ELPP->setPreRollOutCallback(callback);
		}
		/// @brief Uninstalls pre rollout callback
		static inline void uninstallPreRollOutCallback(void)
		{
			ELPP->unsetPreRollOutCallback();
		}
		/// @brief Installs post log dispatch callback, this callback is triggered when log is dispatched
		template <typename T>
		static inline bool installLogDispatchCallback(const std::string& id)
		{
			return ELPP->installLogDispatchCallback<T>(id);
		}
		/// @brief Uninstalls log dispatch callback
		template <typename T>
		static inline void uninstallLogDispatchCallback(const std::string& id)
		{
			ELPP->uninstallLogDispatchCallback<T>(id);
		}
		template <typename T>
		static inline T* logDispatchCallback(const std::string& id)
		{
			return ELPP->logDispatchCallback<T>(id);
		}
		/// @brief Installs post performance tracking callback, this callback is triggered when performance tracking is finished
		template <typename T>
		static inline bool installPerformanceTrackingCallback(const std::string& id)
		{
			return ELPP->installPerformanceTrackingCallback<T>(id);
		}
		/// @brief Uninstalls post performance tracking handler
		template <typename T>
		static inline void uninstallPerformanceTrackingCallback(const std::string& id)
		{
			ELPP->uninstallPerformanceTrackingCallback<T>(id);
		}
		template <typename T>
		static inline T* performanceTrackingCallback(const std::string& id)
		{
			return ELPP->performanceTrackingCallback<T>(id);
		}
		/// @brief Converts template to std::string - useful for loggable classes to log containers within log(std::ostream&) const
		template <typename T>
		static std::string convertTemplateToStdString(const T& templ)
		{
			el::Logger* logger =
				ELPP->registeredLoggers()->get(el::base::consts::kDefaultLoggerId);
			if(logger == nullptr)
			{
				return std::string();
			}
			base::MessageBuilder b;
			b.initialize(logger);
			logger->acquireLock();
			b << templ;
#if defined(ELPP_UNICODE)
			std::string s = std::string(logger->stream().str().begin(), logger->stream().str().end());
#else
			std::string s = logger->stream().str();
#endif  // defined(ELPP_UNICODE)
			logger->stream().str(ELPP_LITERAL(""));
			logger->releaseLock();
			return s;
		}
		/// @brief Returns command line arguments (pointer) provided to easylogging++
		static inline const el::base::utils::CommandLineArgs* commandLineArgs(void)
		{
			return ELPP->commandLineArgs();
		}
		/// @brief Installs user defined format specifier and handler
		static inline void installCustomFormatSpecifier(const CustomFormatSpecifier& customFormatSpecifier)
		{
			ELPP->installCustomFormatSpecifier(customFormatSpecifier);
		}
		/// @brief Uninstalls user defined format specifier and handler
		static inline bool uninstallCustomFormatSpecifier(const char* formatSpecifier)
		{
			return ELPP->uninstallCustomFormatSpecifier(formatSpecifier);
		}
		/// @brief Returns true if custom format specifier is installed
		static inline bool hasCustomFormatSpecifier(const char* formatSpecifier)
		{
			return ELPP->hasCustomFormatSpecifier(formatSpecifier);
		}
		static inline void validateFileRolling(Logger* logger, Level level)
		{
			if(logger == nullptr) return;
			logger->m_typedConfigurations->validateFileRolling(level, ELPP->preRollOutCallback());
		}
	};
	/// @brief Static helpers to deal with loggers and their configurations
	class Loggers : base::StaticClass
	{
	public:
		/// @brief Gets existing or registers new logger
		static inline Logger* getLogger(const std::string& identity, bool registerIfNotAvailable = true)
		{
			base::threading::ScopedLock scopedLock(ELPP->lock());
			return ELPP->registeredLoggers()->get(identity, registerIfNotAvailable);
		}
		/// @brief Unregisters logger - use it only when you know what you are doing, you may unregister
		///        loggers initialized / used by third-party libs.
		static inline bool unregisterLogger(const std::string& identity)
		{
			base::threading::ScopedLock scopedLock(ELPP->lock());
			return ELPP->registeredLoggers()->remove(identity);
		}
		/// @brief Whether or not logger with id is registered
		static inline bool hasLogger(const std::string& identity)
		{
			base::threading::ScopedLock scopedLock(ELPP->lock());
			return ELPP->registeredLoggers()->has(identity);
		}
		/// @brief Reconfigures specified logger with new configurations
		static inline Logger* reconfigureLogger(Logger* logger, const Configurations& configurations)
		{
			if(!logger) return nullptr;
			logger->configure(configurations);
			return logger;
		}
		/// @brief Reconfigures logger with new configurations after looking it up using identity
		static inline Logger* reconfigureLogger(const std::string& identity, const Configurations& configurations)
		{
			return Loggers::reconfigureLogger(Loggers::getLogger(identity), configurations);
		}
		/// @brief Reconfigures logger's single configuration
		static inline Logger* reconfigureLogger(const std::string& identity, ConfigurationType configurationType,
				const std::string& value)
		{
			Logger* logger = Loggers::getLogger(identity);
			if(logger == nullptr)
			{
				return nullptr;
			}
			logger->configurations()->set(Level::Global, configurationType, value);
			logger->reconfigure();
			return logger;
		}
		/// @brief Reconfigures all the existing loggers with new configurations
		static inline void reconfigureAllLoggers(const Configurations& configurations)
		{
			for(base::RegisteredLoggers::iterator it = ELPP->registeredLoggers()->begin();
					it != ELPP->registeredLoggers()->end(); ++it)
			{
				Loggers::reconfigureLogger(it->second, configurations);
			}
		}
		/// @brief Reconfigures single configuration for all the loggers
		static inline void reconfigureAllLoggers(ConfigurationType configurationType, const std::string& value)
		{
			reconfigureAllLoggers(Level::Global, configurationType, value);
		}
		/// @brief Reconfigures single configuration for all the loggers for specified level
		static inline void reconfigureAllLoggers(Level level, ConfigurationType configurationType,
				const std::string& value)
		{
			for(base::RegisteredLoggers::iterator it = ELPP->registeredLoggers()->begin();
					it != ELPP->registeredLoggers()->end(); ++it)
			{
				Logger* logger = it->second;
				logger->configurations()->set(level, configurationType, value);
				logger->reconfigure();
			}
		}
		/// @brief Sets default configurations. This configuration is used for future (and conditionally for existing) loggers
		static inline void setDefaultConfigurations(const Configurations& configurations, bool reconfigureExistingLoggers = false)
		{
			ELPP->registeredLoggers()->setDefaultConfigurations(configurations);
			if(reconfigureExistingLoggers)
			{
				Loggers::reconfigureAllLoggers(configurations);
			}
		}
		/// @brief Returns current default
		static inline const Configurations* defaultConfigurations(void)
		{
			return ELPP->registeredLoggers()->defaultConfigurations();
		}
		/// @brief Returns log stream reference pointer if needed by user
		static inline const base::LogStreamsReferenceMap* logStreamsReference(void)
		{
			return ELPP->registeredLoggers()->logStreamsReference();
		}
		/// @brief Default typed configuration based on existing defaultConf
		static base::TypedConfigurations defaultTypedConfigurations(void)
		{
			return base::TypedConfigurations(
				ELPP->registeredLoggers()->defaultConfigurations(),
				ELPP->registeredLoggers()->logStreamsReference());
		}
		/// @brief Populates all logger IDs in current repository.
		/// @param [out] targetList List of fill up.
		static inline std::vector<std::string>* populateAllLoggerIds(std::vector<std::string>* targetList)
		{
			targetList->clear();
			for(base::RegisteredLoggers::iterator it = ELPP->registeredLoggers()->list().begin();
					it != ELPP->registeredLoggers()->list().end(); ++it)
			{
				targetList->push_back(it->first);
			}
			return targetList;
		}
		/// @brief Sets configurations from global configuration file.
		static void configureFromGlobal(const char* globalConfigurationFilePath)
		{
			std::ifstream gcfStream(globalConfigurationFilePath, std::ifstream::in);
			ELPP_ASSERT(gcfStream.is_open(), "Unable to open global configuration file [" << globalConfigurationFilePath
				<< "] for parsing.");
			std::string line = std::string();
			std::stringstream ss;
			Logger* logger = nullptr;
			auto configure = [&](void)
			{
				ELPP_INTERNAL_INFO(8, "Configuring logger: '" << logger->id() << "' with configurations \n" << ss.str()
					<< "\n--------------");
				Configurations c;
				c.parseFromText(ss.str());
				logger->configure(c);
			};
			while(gcfStream.good())
			{
				std::getline(gcfStream, line);
				ELPP_INTERNAL_INFO(1, "Parsing line: " << line);
				base::utils::Str::trim(line);
				if(Configurations::Parser::isComment(line)) continue;
				Configurations::Parser::ignoreComments(&line);
				base::utils::Str::trim(line);
				if(line.size() > 2 && base::utils::Str::startsWith(line, std::string(base::consts::kConfigurationLoggerId)))
				{
					if(!ss.str().empty() && logger != nullptr)
					{
						configure();
					}
					ss.str(std::string(""));
					line = line.substr(2);
					base::utils::Str::trim(line);
					if(line.size() > 1)
					{
						ELPP_INTERNAL_INFO(1, "Getting logger: '" << line << "'");
						logger = getLogger(line);
					}
				}
				else
				{
					ss << line << "\n";
				}
			}
			if(!ss.str().empty() && logger != nullptr)
			{
				configure();
			}
		}
		/// @brief Configures loggers using command line arg. Ensure you have already set command line args,
		/// @return False if invalid argument or argument with no value provided, true if attempted to configure logger.
		///         If true is returned that does not mean it has been configured successfully, it only means that it
		///         has attempeted to configure logger using configuration file provided in argument
		static inline bool configureFromArg(const char* argKey)
		{
#if defined(ELPP_DISABLE_CONFIGURATION_FROM_PROGRAM_ARGS)
			ELPP_UNUSED(argKey);
#else
			if(!Helpers::commandLineArgs()->hasParamWithValue(argKey))
			{
				return false;
			}
			configureFromGlobal(Helpers::commandLineArgs()->getParamValue(argKey));
#endif  // defined(ELPP_DISABLE_CONFIGURATION_FROM_PROGRAM_ARGS)
			return true;
		}
		/// @brief Flushes all loggers for all levels - Be careful if you dont know how many loggers are registered
		static inline void flushAll(void)
		{
			ELPP->registeredLoggers()->flushAll();
		}
		/// @brief Adds logging flag used internally.
		static inline void addFlag(LoggingFlag flag)
		{
			ELPP->addFlag(flag);
		}
		/// @brief Removes logging flag used internally.
		static inline void removeFlag(LoggingFlag flag)
		{
			ELPP->removeFlag(flag);
		}
		/// @brief Determines whether or not certain flag is active
		static inline bool hasFlag(LoggingFlag flag)
		{
			return ELPP->hasFlag(flag);
		}
		/// @brief Adds flag and removes it when scope goes out
		class ScopedAddFlag
		{
		public:
			ScopedAddFlag(LoggingFlag flag) : m_flag(flag)
			{
				Loggers::addFlag(m_flag);
			}
			~ScopedAddFlag(void)
			{
				Loggers::removeFlag(m_flag);
			}
		private:
			LoggingFlag m_flag;
		};
		/// @brief Removes flag and add it when scope goes out
		class ScopedRemoveFlag
		{
		public:
			ScopedRemoveFlag(LoggingFlag flag) : m_flag(flag)
			{
				Loggers::removeFlag(m_flag);
			}
			~ScopedRemoveFlag(void)
			{
				Loggers::addFlag(m_flag);
			}
		private:
			LoggingFlag m_flag;
		};
		/// @brief Sets hierarchy for logging. Needs to enable logging flag (HierarchicalLogging)
		static inline void setLoggingLevel(Level level)
		{
			ELPP->setLoggingLevel(level);
		}
		/// @brief Sets verbose level on the fly
		static inline void setVerboseLevel(base::type::VerboseLevel level)
		{
			ELPP->vRegistry()->setLevel(level);
		}
		/// @brief Gets current verbose level
		static inline base::type::VerboseLevel verboseLevel(void)
		{
			return ELPP->vRegistry()->level();
		}
		/// @brief Sets vmodules as specified (on the fly)
		static inline void setVModules(const char* modules)
		{
			if(ELPP->vRegistry()->vModulesEnabled())
			{
				ELPP->vRegistry()->setModules(modules);
			}
		}
		/// @brief Clears vmodules
		static inline void clearVModules(void)
		{
			ELPP->vRegistry()->clearModules();
		}
	};
	class VersionInfo : base::StaticClass
	{
	public:
		/// @brief Current version number
		static inline const std::string version(void)
		{
			return std::string("9.80");
		}
		/// @brief Release date of current version
		static inline const std::string releaseDate(void)
		{
			return std::string("08-01-2015 0850hrs");
		}
	};
}  // namespace el
#undef VLOG_IS_ON
/// @brief Determines whether verbose logging is on for specified level current file.
#define VLOG_IS_ON(verboseLevel) (ELPP->vRegistry()->allowed(verboseLevel, __FILE__))
#undef TIMED_BLOCK
#undef TIMED_SCOPE
#undef TIMED_FUNC
#undef ELPP_MIN_UNIT
#if defined(ELPP_PERFORMANCE_MICROSECONDS)
#   define ELPP_MIN_UNIT el::base::TimestampUnit::Microsecond
#else
#   define ELPP_MIN_UNIT el::base::TimestampUnit::Millisecond
#endif  // (defined(ELPP_PERFORMANCE_MICROSECONDS))
/// @brief Performance tracked scope. Performance gets written when goes out of scope using
///        'performance' logger.
///
/// @detail Please note in order to check the performance at a certain time you can use obj.checkpoint();
/// @see el::base::PerformanceTracker
/// @see el::base::PerformanceTracker::checkpoint
// Note: Do not surround this definition with null macro because of obj instance
#define TIMED_SCOPE(obj, blockname) el::base::PerformanceTracker obj(blockname, ELPP_MIN_UNIT)
#define TIMED_BLOCK(obj, blockName) for (struct { int i; el::base::PerformanceTracker timer; } obj = { 0, \
    el::base::PerformanceTracker(blockName, ELPP_MIN_UNIT) }; obj.i < 1; ++obj.i)
/// @brief Performance tracked function. Performance gets written when goes out of scope using
///        'performance' logger.
///
/// @detail Please note in order to check the performance at a certain time you can use obj.checkpoint();
/// @see el::base::PerformanceTracker
/// @see el::base::PerformanceTracker::checkpoint
#define TIMED_FUNC(obj) TIMED_SCOPE(obj, ELPP_FUNC)
#undef PERFORMANCE_CHECKPOINT
#undef PERFORMANCE_CHECKPOINT_WITH_ID
#define PERFORMANCE_CHECKPOINT(obj) obj.checkpoint(std::string(), __FILE__, __LINE__, ELPP_FUNC)
#define PERFORMANCE_CHECKPOINT_WITH_ID(obj, id) obj.checkpoint(id, __FILE__, __LINE__, ELPP_FUNC)
#undef ELPP_COUNTER
#undef ELPP_COUNTER_POS
/// @brief Gets hit counter for file/line
#define ELPP_COUNTER (ELPP->hitCounters()->getCounter(__FILE__, __LINE__))
/// @brief Gets hit counter position for file/line, -1 if not registered yet
#define ELPP_COUNTER_POS (ELPP_COUNTER == nullptr ? -1 : ELPP_COUNTER->hitCounts())
// Undef levels to support LOG(LEVEL)
#undef INFO
#undef WARNING
#undef DEBUG
#undef ERROR
#undef FATAL
#undef TRACE
#undef VERBOSE
// Undef existing
#undef CINFO
#undef CWARNING
#undef CDEBUG
#undef CFATAL
#undef CERROR
#undef CTRACE
#undef CVERBOSE
#undef CINFO_IF
#undef CWARNING_IF
#undef CDEBUG_IF
#undef CERROR_IF
#undef CFATAL_IF
#undef CTRACE_IF
#undef CVERBOSE_IF
#undef CINFO_EVERY_N
#undef CWARNING_EVERY_N
#undef CDEBUG_EVERY_N
#undef CERROR_EVERY_N
#undef CFATAL_EVERY_N
#undef CTRACE_EVERY_N
#undef CVERBOSE_EVERY_N
#undef CINFO_AFTER_N
#undef CWARNING_AFTER_N
#undef CDEBUG_AFTER_N
#undef CERROR_AFTER_N
#undef CFATAL_AFTER_N
#undef CTRACE_AFTER_N
#undef CVERBOSE_AFTER_N
#undef CINFO_N_TIMES
#undef CWARNING_N_TIMES
#undef CDEBUG_N_TIMES
#undef CERROR_N_TIMES
#undef CFATAL_N_TIMES
#undef CTRACE_N_TIMES
#undef CVERBOSE_N_TIMES
// Normal logs
#if ELPP_INFO_LOG
#   define CINFO(writer, dispatchAction, ...) ELPP_WRITE_LOG(writer, el::Level::Info, dispatchAction, __VA_ARGS__)
#else
#   define CINFO(writer, dispatchAction, ...) el::base::NullWriter()
#endif  // ELPP_INFO_LOG
#if ELPP_WARNING_LOG
#   define CWARNING(writer, dispatchAction, ...) ELPP_WRITE_LOG(writer, el::Level::Warning, dispatchAction, __VA_ARGS__)
#else
#   define CWARNING(writer, dispatchAction, ...) el::base::NullWriter()
#endif  // ELPP_WARNING_LOG
#if ELPP_DEBUG_LOG
#   define CDEBUG(writer, dispatchAction, ...) ELPP_WRITE_LOG(writer, el::Level::Debug, dispatchAction, __VA_ARGS__)
#else
#   define CDEBUG(writer, dispatchAction, ...) el::base::NullWriter()
#endif  // ELPP_DEBUG_LOG
#if ELPP_ERROR_LOG
#   define CERROR(writer, dispatchAction, ...) ELPP_WRITE_LOG(writer, el::Level::Error, dispatchAction, __VA_ARGS__)
#else
#   define CERROR(writer, dispatchAction, ...) el::base::NullWriter()
#endif  // ELPP_ERROR_LOG
#if ELPP_FATAL_LOG
#   define CFATAL(writer, dispatchAction, ...) ELPP_WRITE_LOG(writer, el::Level::Fatal, dispatchAction, __VA_ARGS__)
#else
#   define CFATAL(writer, dispatchAction, ...) el::base::NullWriter()
#endif  // ELPP_FATAL_LOG
#if ELPP_TRACE_LOG
#   define CTRACE(writer, dispatchAction, ...) ELPP_WRITE_LOG(writer, el::Level::Trace, dispatchAction, __VA_ARGS__)
#else
#   define CTRACE(writer, dispatchAction, ...) el::base::NullWriter()
#endif  // ELPP_TRACE_LOG
#if ELPP_VERBOSE_LOG
#   define CVERBOSE(writer, vlevel, dispatchAction, ...) if (VLOG_IS_ON(vlevel)) writer(\
       el::Level::Verbose, __FILE__, __LINE__, ELPP_FUNC, dispatchAction, vlevel).construct(el_getVALength(__VA_ARGS__), __VA_ARGS__)
#else
#   define CVERBOSE(writer, vlevel, dispatchAction, ...) el::base::NullWriter()
#endif  // ELPP_VERBOSE_LOG
// Conditional logs
#if ELPP_INFO_LOG
#   define CINFO_IF(writer, condition_, dispatchAction, ...) \
        ELPP_WRITE_LOG_IF(writer, (condition_), el::Level::Info, dispatchAction, __VA_ARGS__)
#else
#   define CINFO_IF(writer, condition_, dispatchAction, ...) el::base::NullWriter()
#endif  // ELPP_INFO_LOG
#if ELPP_WARNING_LOG
#   define CWARNING_IF(writer, condition_, dispatchAction, ...)\
        ELPP_WRITE_LOG_IF(writer, (condition_), el::Level::Warning, dispatchAction, __VA_ARGS__)
#else
#   define CWARNING_IF(writer, condition_, dispatchAction, ...) el::base::NullWriter()
#endif  // ELPP_WARNING_LOG
#if ELPP_DEBUG_LOG
#   define CDEBUG_IF(writer, condition_, dispatchAction, ...)\
        ELPP_WRITE_LOG_IF(writer, (condition_), el::Level::Debug, dispatchAction, __VA_ARGS__)
#else
#   define CDEBUG_IF(writer, condition_, dispatchAction, ...) el::base::NullWriter()
#endif  // ELPP_DEBUG_LOG
#if ELPP_ERROR_LOG
#   define CERROR_IF(writer, condition_, dispatchAction, ...)\
        ELPP_WRITE_LOG_IF(writer, (condition_), el::Level::Error, dispatchAction, __VA_ARGS__)
#else
#   define CERROR_IF(writer, condition_, dispatchAction, ...) el::base::NullWriter()
#endif  // ELPP_ERROR_LOG
#if ELPP_FATAL_LOG
#   define CFATAL_IF(writer, condition_, dispatchAction, ...)\
        ELPP_WRITE_LOG_IF(writer, (condition_), el::Level::Fatal, dispatchAction, __VA_ARGS__)
#else
#   define CFATAL_IF(writer, condition_, dispatchAction, ...) el::base::NullWriter()
#endif  // ELPP_FATAL_LOG
#if ELPP_TRACE_LOG
#   define CTRACE_IF(writer, condition_, dispatchAction, ...)\
        ELPP_WRITE_LOG_IF(writer, (condition_), el::Level::Trace, dispatchAction, __VA_ARGS__)
#else
#   define CTRACE_IF(writer, condition_, dispatchAction, ...) el::base::NullWriter()
#endif  // ELPP_TRACE_LOG
#if ELPP_VERBOSE_LOG
#   define CVERBOSE_IF(writer, condition_, vlevel, dispatchAction, ...) if (VLOG_IS_ON(vlevel) && (condition_)) writer( \
       el::Level::Verbose, __FILE__, __LINE__, ELPP_FUNC, dispatchAction, vlevel).construct(el_getVALength(__VA_ARGS__), __VA_ARGS__)
#else
#   define CVERBOSE_IF(writer, condition_, vlevel, dispatchAction, ...) el::base::NullWriter()
#endif  // ELPP_VERBOSE_LOG
// Occasional logs
#if ELPP_INFO_LOG
#   define CINFO_EVERY_N(writer, occasion, dispatchAction, ...)\
        ELPP_WRITE_LOG_EVERY_N(writer, occasion, el::Level::Info, dispatchAction, __VA_ARGS__)
#else
#   define CINFO_EVERY_N(writer, occasion, dispatchAction, ...) el::base::NullWriter()
#endif  // ELPP_INFO_LOG
#if ELPP_WARNING_LOG
#   define CWARNING_EVERY_N(writer, occasion, dispatchAction, ...)\
        ELPP_WRITE_LOG_EVERY_N(writer, occasion, el::Level::Warning, dispatchAction, __VA_ARGS__)
#else
#   define CWARNING_EVERY_N(writer, occasion, dispatchAction, ...) el::base::NullWriter()
#endif  // ELPP_WARNING_LOG
#if ELPP_DEBUG_LOG
#   define CDEBUG_EVERY_N(writer, occasion, dispatchAction, ...)\
        ELPP_WRITE_LOG_EVERY_N(writer, occasion, el::Level::Debug, dispatchAction, __VA_ARGS__)
#else
#   define CDEBUG_EVERY_N(writer, occasion, dispatchAction, ...) el::base::NullWriter()
#endif  // ELPP_DEBUG_LOG
#if ELPP_ERROR_LOG
#   define CERROR_EVERY_N(writer, occasion, dispatchAction, ...)\
        ELPP_WRITE_LOG_EVERY_N(writer, occasion, el::Level::Error, dispatchAction, __VA_ARGS__)
#else
#   define CERROR_EVERY_N(writer, occasion, dispatchAction, ...) el::base::NullWriter()
#endif  // ELPP_ERROR_LOG
#if ELPP_FATAL_LOG
#   define CFATAL_EVERY_N(writer, occasion, dispatchAction, ...)\
        ELPP_WRITE_LOG_EVERY_N(writer, occasion, el::Level::Fatal, dispatchAction, __VA_ARGS__)
#else
#   define CFATAL_EVERY_N(writer, occasion, dispatchAction, ...) el::base::NullWriter()
#endif  // ELPP_FATAL_LOG
#if ELPP_TRACE_LOG
#   define CTRACE_EVERY_N(writer, occasion, dispatchAction, ...)\
        ELPP_WRITE_LOG_EVERY_N(writer, occasion, el::Level::Trace, dispatchAction, __VA_ARGS__)
#else
#   define CTRACE_EVERY_N(writer, occasion, dispatchAction, ...) el::base::NullWriter()
#endif  // ELPP_TRACE_LOG
#if ELPP_VERBOSE_LOG
#   define CVERBOSE_EVERY_N(writer, occasion, vlevel, dispatchAction, ...)\
        CVERBOSE_IF(writer, ELPP->validateEveryNCounter(__FILE__, __LINE__, occasion), vlevel, dispatchAction, __VA_ARGS__)
#else
#   define CVERBOSE_EVERY_N(writer, occasion, vlevel, dispatchAction, ...) el::base::NullWriter()
#endif  // ELPP_VERBOSE_LOG
// After N logs
#if ELPP_INFO_LOG
#   define CINFO_AFTER_N(writer, n, dispatchAction, ...)\
        ELPP_WRITE_LOG_AFTER_N(writer, n, el::Level::Info, dispatchAction, __VA_ARGS__)
#else
#   define CINFO_AFTER_N(writer, n, dispatchAction, ...) el::base::NullWriter()
#endif  // ELPP_INFO_LOG
#if ELPP_WARNING_LOG
#   define CWARNING_AFTER_N(writer, n, dispatchAction, ...)\
        ELPP_WRITE_LOG_AFTER_N(writer, n, el::Level::Warning, dispatchAction, __VA_ARGS__)
#else
#   define CWARNING_AFTER_N(writer, n, dispatchAction, ...) el::base::NullWriter()
#endif  // ELPP_WARNING_LOG
#if ELPP_DEBUG_LOG
#   define CDEBUG_AFTER_N(writer, n, dispatchAction, ...)\
        ELPP_WRITE_LOG_AFTER_N(writer, n, el::Level::Debug, dispatchAction, __VA_ARGS__)
#else
#   define CDEBUG_AFTER_N(writer, n, dispatchAction, ...) el::base::NullWriter()
#endif  // ELPP_DEBUG_LOG
#if ELPP_ERROR_LOG
#   define CERROR_AFTER_N(writer, n, dispatchAction, ...)\
        ELPP_WRITE_LOG_AFTER_N(writer, n, el::Level::Error, dispatchAction, __VA_ARGS__)
#else
#   define CERROR_AFTER_N(writer, n, dispatchAction, ...) el::base::NullWriter()
#endif  // ELPP_ERROR_LOG
#if ELPP_FATAL_LOG
#   define CFATAL_AFTER_N(writer, n, dispatchAction, ...)\
        ELPP_WRITE_LOG_AFTER_N(writer, n, el::Level::Fatal, dispatchAction, __VA_ARGS__)
#else
#   define CFATAL_AFTER_N(writer, n, dispatchAction, ...) el::base::NullWriter()
#endif  // ELPP_FATAL_LOG
#if ELPP_TRACE_LOG
#   define CTRACE_AFTER_N(writer, n, dispatchAction, ...)\
        ELPP_WRITE_LOG_AFTER_N(writer, n, el::Level::Trace, dispatchAction, __VA_ARGS__)
#else
#   define CTRACE_AFTER_N(writer, n, dispatchAction, ...) el::base::NullWriter()
#endif  // ELPP_TRACE_LOG
#if ELPP_VERBOSE_LOG
#   define CVERBOSE_AFTER_N(writer, n, vlevel, dispatchAction, ...)\
        CVERBOSE_IF(writer, ELPP->validateAfterNCounter(__FILE__, __LINE__, n), vlevel, dispatchAction, __VA_ARGS__)
#else
#   define CVERBOSE_AFTER_N(writer, n, vlevel, dispatchAction, ...) el::base::NullWriter()
#endif  // ELPP_VERBOSE_LOG
// N Times logs
#if ELPP_INFO_LOG
#   define CINFO_N_TIMES(writer, n, dispatchAction, ...)\
        ELPP_WRITE_LOG_N_TIMES(writer, n, el::Level::Info, dispatchAction, __VA_ARGS__)
#else
#   define CINFO_N_TIMES(writer, n, dispatchAction, ...) el::base::NullWriter()
#endif  // ELPP_INFO_LOG
#if ELPP_WARNING_LOG
#   define CWARNING_N_TIMES(writer, n, dispatchAction, ...)\
        ELPP_WRITE_LOG_N_TIMES(writer, n, el::Level::Warning, dispatchAction, __VA_ARGS__)
#else
#   define CWARNING_N_TIMES(writer, n, dispatchAction, ...) el::base::NullWriter()
#endif  // ELPP_WARNING_LOG
#if ELPP_DEBUG_LOG
#   define CDEBUG_N_TIMES(writer, n, dispatchAction, ...)\
        ELPP_WRITE_LOG_N_TIMES(writer, n, el::Level::Debug, dispatchAction, __VA_ARGS__)
#else
#   define CDEBUG_N_TIMES(writer, n, dispatchAction, ...) el::base::NullWriter()
#endif  // ELPP_DEBUG_LOG
#if ELPP_ERROR_LOG
#   define CERROR_N_TIMES(writer, n, dispatchAction, ...)\
        ELPP_WRITE_LOG_N_TIMES(writer, n, el::Level::Error, dispatchAction, __VA_ARGS__)
#else
#   define CERROR_N_TIMES(writer, n, dispatchAction, ...) el::base::NullWriter()
#endif  // ELPP_ERROR_LOG
#if ELPP_FATAL_LOG
#   define CFATAL_N_TIMES(writer, n, dispatchAction, ...)\
        ELPP_WRITE_LOG_N_TIMES(writer, n, el::Level::Fatal, dispatchAction, __VA_ARGS__)
#else
#   define CFATAL_N_TIMES(writer, n, dispatchAction, ...) el::base::NullWriter()
#endif  // ELPP_FATAL_LOG
#if ELPP_TRACE_LOG
#   define CTRACE_N_TIMES(writer, n, dispatchAction, ...)\
        ELPP_WRITE_LOG_N_TIMES(writer, n, el::Level::Trace, dispatchAction, __VA_ARGS__)
#else
#   define CTRACE_N_TIMES(writer, n, dispatchAction, ...) el::base::NullWriter()
#endif  // ELPP_TRACE_LOG
#if ELPP_VERBOSE_LOG
#   define CVERBOSE_N_TIMES(writer, n, vlevel, dispatchAction, ...)\
        CVERBOSE_IF(writer, ELPP->validateNTimesCounter(__FILE__, __LINE__, n), vlevel, dispatchAction, __VA_ARGS__)
#else
#   define CVERBOSE_N_TIMES(writer, n, vlevel, dispatchAction, ...) el::base::NullWriter()
#endif  // ELPP_VERBOSE_LOG
//
// Custom Loggers - Requires (level, dispatchAction, loggerId/s)
//
// undef existing
#undef CLOG
#undef CLOG_VERBOSE
#undef CVLOG
#undef CLOG_IF
#undef CLOG_VERBOSE_IF
#undef CVLOG_IF
#undef CLOG_EVERY_N
#undef CVLOG_EVERY_N
#undef CLOG_AFTER_N
#undef CVLOG_AFTER_N
#undef CLOG_N_TIMES
#undef CVLOG_N_TIMES
// Normal logs
#define CLOG(LEVEL, ...)\
    C##LEVEL(el::base::Writer, el::base::DispatchAction::NormalLog, __VA_ARGS__)
#define CVLOG(vlevel, ...) CVERBOSE(el::base::Writer, vlevel, el::base::DispatchAction::NormalLog, __VA_ARGS__)
// Conditional logs
#define CLOG_IF(condition, LEVEL, ...)\
    C##LEVEL##_IF(el::base::Writer, condition, el::base::DispatchAction::NormalLog, __VA_ARGS__)
#define CVLOG_IF(condition, vlevel, ...)\
    CVERBOSE_IF(el::base::Writer, condition, vlevel, el::base::DispatchAction::NormalLog, __VA_ARGS__)
// Hit counts based logs
#define CLOG_EVERY_N(n, LEVEL, ...)\
    C##LEVEL##_EVERY_N(el::base::Writer, n, el::base::DispatchAction::NormalLog, __VA_ARGS__)
#define CVLOG_EVERY_N(n, vlevel, ...)\
    CVERBOSE_EVERY_N(el::base::Writer, n, vlevel, el::base::DispatchAction::NormalLog, __VA_ARGS__)
#define CLOG_AFTER_N(n, LEVEL, ...)\
    C##LEVEL##_AFTER_N(el::base::Writer, n, el::base::DispatchAction::NormalLog, __VA_ARGS__)
#define CVLOG_AFTER_N(n, vlevel, ...)\
    CVERBOSE_AFTER_N(el::base::Writer, n, vlevel, el::base::DispatchAction::NormalLog, __VA_ARGS__)
#define CLOG_N_TIMES(n, LEVEL, ...)\
    C##LEVEL##_N_TIMES(el::base::Writer, n, el::base::DispatchAction::NormalLog, __VA_ARGS__)
#define CVLOG_N_TIMES(n, vlevel, ...)\
    CVERBOSE_N_TIMES(el::base::Writer, n, vlevel, el::base::DispatchAction::NormalLog, __VA_ARGS__)
//
// Default Loggers macro using CLOG(), CLOG_VERBOSE() and CVLOG() macros
//
// undef existing
#undef LOG
#undef VLOG
#undef LOG_IF
#undef VLOG_IF
#undef LOG_EVERY_N
#undef VLOG_EVERY_N
#undef LOG_AFTER_N
#undef VLOG_AFTER_N
#undef LOG_N_TIMES
#undef VLOG_N_TIMES
#undef ELPP_CURR_FILE_LOGGER_ID
#if defined(ELPP_DEFAULT_LOGGER)
#   define ELPP_CURR_FILE_LOGGER_ID ELPP_DEFAULT_LOGGER
#else
#   define ELPP_CURR_FILE_LOGGER_ID el::base::consts::kDefaultLoggerId
#endif
#undef ELPP_TRACE
#define ELPP_TRACE CLOG(TRACE, ELPP_CURR_FILE_LOGGER_ID)
// Normal logs
#define LOG(LEVEL) CLOG(LEVEL, ELPP_CURR_FILE_LOGGER_ID)
#define VLOG(vlevel) CVLOG(vlevel, ELPP_CURR_FILE_LOGGER_ID)
// Conditional logs
#define LOG_IF(condition, LEVEL) CLOG_IF(condition, LEVEL, ELPP_CURR_FILE_LOGGER_ID)
#define VLOG_IF(condition, vlevel) CVLOG_IF(condition, vlevel, ELPP_CURR_FILE_LOGGER_ID)
// Hit counts based logs
#define LOG_EVERY_N(n, LEVEL) CLOG_EVERY_N(n, LEVEL, ELPP_CURR_FILE_LOGGER_ID)
#define VLOG_EVERY_N(n, vlevel) CVLOG_EVERY_N(n, vlevel, ELPP_CURR_FILE_LOGGER_ID)
#define LOG_AFTER_N(n, LEVEL) CLOG_AFTER_N(n, LEVEL, ELPP_CURR_FILE_LOGGER_ID)
#define VLOG_AFTER_N(n, vlevel) CVLOG_AFTER_N(n, vlevel, ELPP_CURR_FILE_LOGGER_ID)
#define LOG_N_TIMES(n, LEVEL) CLOG_N_TIMES(n, LEVEL, ELPP_CURR_FILE_LOGGER_ID)
#define VLOG_N_TIMES(n, vlevel) CVLOG_N_TIMES(n, vlevel, ELPP_CURR_FILE_LOGGER_ID)
// Generic PLOG()
#undef CPLOG
#undef CPLOG_IF
#undef PLOG
#undef PLOG_IF
#undef DCPLOG
#undef DCPLOG_IF
#undef DPLOG
#undef DPLOG_IF
#define CPLOG(LEVEL, ...)\
    C##LEVEL(el::base::PErrorWriter, el::base::DispatchAction::NormalLog, __VA_ARGS__)
#define CPLOG_IF(condition, LEVEL, ...)\
    C##LEVEL##_IF(el::base::PErrorWriter, condition, el::base::DispatchAction::NormalLog, __VA_ARGS__)
#define DCPLOG(LEVEL, ...)\
    if (ELPP_DEBUG_LOG) C##LEVEL(el::base::PErrorWriter, el::base::DispatchAction::NormalLog, __VA_ARGS__)
#define DCPLOG_IF(condition, LEVEL, ...)\
    C##LEVEL##_IF(el::base::PErrorWriter, (ELPP_DEBUG_LOG) && (condition), el::base::DispatchAction::NormalLog, __VA_ARGS__)
#define PLOG(LEVEL) CPLOG(LEVEL, ELPP_CURR_FILE_LOGGER_ID)
#define PLOG_IF(condition, LEVEL) CPLOG_IF(condition, LEVEL, ELPP_CURR_FILE_LOGGER_ID)
#define DPLOG(LEVEL) DCPLOG(LEVEL, ELPP_CURR_FILE_LOGGER_ID)
#define DPLOG_IF(condition, LEVEL) DCPLOG_IF(condition, LEVEL, ELPP_CURR_FILE_LOGGER_ID)
// Generic SYSLOG()
#undef CSYSLOG
#undef CSYSLOG_IF
#undef CSYSLOG_EVERY_N
#undef CSYSLOG_AFTER_N
#undef CSYSLOG_N_TIMES
#undef SYSLOG
#undef SYSLOG_IF
#undef SYSLOG_EVERY_N
#undef SYSLOG_AFTER_N
#undef SYSLOG_N_TIMES
#undef DCSYSLOG
#undef DCSYSLOG_IF
#undef DCSYSLOG_EVERY_N
#undef DCSYSLOG_AFTER_N
#undef DCSYSLOG_N_TIMES
#undef DSYSLOG
#undef DSYSLOG_IF
#undef DSYSLOG_EVERY_N
#undef DSYSLOG_AFTER_N
#undef DSYSLOG_N_TIMES
#if defined(ELPP_SYSLOG)
#   define CSYSLOG(LEVEL, ...)\
        C##LEVEL(el::base::Writer, el::base::DispatchAction::SysLog, __VA_ARGS__)
#   define CSYSLOG_IF(condition, LEVEL, ...)\
        C##LEVEL##_IF(el::base::Writer, condition, el::base::DispatchAction::SysLog, __VA_ARGS__)
#   define CSYSLOG_EVERY_N(n, LEVEL, ...) C##LEVEL##_EVERY_N(el::base::Writer, n, el::base::DispatchAction::SysLog, __VA_ARGS__)
#   define CSYSLOG_AFTER_N(n, LEVEL, ...) C##LEVEL##_AFTER_N(el::base::Writer, n, el::base::DispatchAction::SysLog, __VA_ARGS__)
#   define CSYSLOG_N_TIMES(n, LEVEL, ...) C##LEVEL##_N_TIMES(el::base::Writer, n, el::base::DispatchAction::SysLog, __VA_ARGS__)
#   define SYSLOG(LEVEL) CSYSLOG(LEVEL, el::base::consts::kSysLogLoggerId)
#   define SYSLOG_IF(condition, LEVEL) CSYSLOG_IF(condition, LEVEL, el::base::consts::kSysLogLoggerId)
#   define SYSLOG_EVERY_N(n, LEVEL) CSYSLOG_EVERY_N(n, LEVEL, el::base::consts::kSysLogLoggerId)
#   define SYSLOG_AFTER_N(n, LEVEL) CSYSLOG_AFTER_N(n, LEVEL, el::base::consts::kSysLogLoggerId)
#   define SYSLOG_N_TIMES(n, LEVEL) CSYSLOG_N_TIMES(n, LEVEL, el::base::consts::kSysLogLoggerId)
#   define DCSYSLOG(LEVEL, ...) if (ELPP_DEBUG_LOG) C##LEVEL(el::base::Writer, el::base::DispatchAction::SysLog, __VA_ARGS__)
#   define DCSYSLOG_IF(condition, LEVEL, ...)\
        C##LEVEL##_IF(el::base::Writer, (ELPP_DEBUG_LOG) && (condition), el::base::DispatchAction::SysLog, __VA_ARGS__)
#   define DCSYSLOG_EVERY_N(n, LEVEL, ...)\
        if (ELPP_DEBUG_LOG) C##LEVEL##_EVERY_N(el::base::Writer, n, el::base::DispatchAction::SysLog, __VA_ARGS__)
#   define DCSYSLOG_AFTER_N(n, LEVEL, ...)\
        if (ELPP_DEBUG_LOG) C##LEVEL##_AFTER_N(el::base::Writer, n, el::base::DispatchAction::SysLog, __VA_ARGS__)
#   define DCSYSLOG_N_TIMES(n, LEVEL, ...)\
        if (ELPP_DEBUG_LOG) C##LEVEL##_EVERY_N(el::base::Writer, n, el::base::DispatchAction::SysLog, __VA_ARGS__)
#   define DSYSLOG(LEVEL) DCSYSLOG(LEVEL, el::base::consts::kSysLogLoggerId)
#   define DSYSLOG_IF(condition, LEVEL) DCSYSLOG_IF(condition, LEVEL, el::base::consts::kSysLogLoggerId)
#   define DSYSLOG_EVERY_N(n, LEVEL) DCSYSLOG_EVERY_N(n, LEVEL, el::base::consts::kSysLogLoggerId)
#   define DSYSLOG_AFTER_N(n, LEVEL) DCSYSLOG_AFTER_N(n, LEVEL, el::base::consts::kSysLogLoggerId)
#   define DSYSLOG_N_TIMES(n, LEVEL) DCSYSLOG_N_TIMES(n, LEVEL, el::base::consts::kSysLogLoggerId)
#else
#   define CSYSLOG(LEVEL, ...) el::base::NullWriter()
#   define CSYSLOG_IF(condition, LEVEL, ...) el::base::NullWriter()
#   define CSYSLOG_EVERY_N(n, LEVEL, ...) el::base::NullWriter()
#   define CSYSLOG_AFTER_N(n, LEVEL, ...) el::base::NullWriter()
#   define CSYSLOG_N_TIMES(n, LEVEL, ...) el::base::NullWriter()
#   define SYSLOG(LEVEL) el::base::NullWriter()
#   define SYSLOG_IF(condition, LEVEL) el::base::NullWriter()
#   define SYSLOG_EVERY_N(n, LEVEL) el::base::NullWriter()
#   define SYSLOG_AFTER_N(n, LEVEL) el::base::NullWriter()
#   define SYSLOG_N_TIMES(n, LEVEL) el::base::NullWriter()
#   define DCSYSLOG(LEVEL, ...) el::base::NullWriter()
#   define DCSYSLOG_IF(condition, LEVEL, ...) el::base::NullWriter()
#   define DCSYSLOG_EVERY_N(n, LEVEL, ...) el::base::NullWriter()
#   define DCSYSLOG_AFTER_N(n, LEVEL, ...) el::base::NullWriter()
#   define DCSYSLOG_N_TIMES(n, LEVEL, ...) el::base::NullWriter()
#   define DSYSLOG(LEVEL) el::base::NullWriter()
#   define DSYSLOG_IF(condition, LEVEL) el::base::NullWriter()
#   define DSYSLOG_EVERY_N(n, LEVEL) el::base::NullWriter()
#   define DSYSLOG_AFTER_N(n, LEVEL) el::base::NullWriter()
#   define DSYSLOG_N_TIMES(n, LEVEL) el::base::NullWriter()
#endif  // defined(ELPP_SYSLOG)
//
// Custom Debug Only Loggers - Requires (level, loggerId/s)
//
// undef existing
#undef DCLOG
#undef DCVLOG
#undef DCLOG_IF
#undef DCVLOG_IF
#undef DCLOG_EVERY_N
#undef DCVLOG_EVERY_N
#undef DCLOG_AFTER_N
#undef DCVLOG_AFTER_N
#undef DCLOG_N_TIMES
#undef DCVLOG_N_TIMES
// Normal logs
#define DCLOG(LEVEL, ...) if (ELPP_DEBUG_LOG) CLOG(LEVEL, __VA_ARGS__)
#define DCLOG_VERBOSE(vlevel, ...) if (ELPP_DEBUG_LOG) CLOG_VERBOSE(vlevel, __VA_ARGS__)
#define DCVLOG(vlevel, ...) if (ELPP_DEBUG_LOG) CVLOG(vlevel, __VA_ARGS__)
// Conditional logs
#define DCLOG_IF(condition, LEVEL, ...) if (ELPP_DEBUG_LOG) CLOG_IF(condition, LEVEL, __VA_ARGS__)
#define DCVLOG_IF(condition, vlevel, ...) if (ELPP_DEBUG_LOG) CVLOG_IF(condition, vlevel, __VA_ARGS__)
// Hit counts based logs
#define DCLOG_EVERY_N(n, LEVEL, ...) if (ELPP_DEBUG_LOG) CLOG_EVERY_N(n, LEVEL, __VA_ARGS__)
#define DCVLOG_EVERY_N(n, vlevel, ...) if (ELPP_DEBUG_LOG) CVLOG_EVERY_N(n, vlevel, __VA_ARGS__)
#define DCLOG_AFTER_N(n, LEVEL, ...) if (ELPP_DEBUG_LOG) CLOG_AFTER_N(n, LEVEL, __VA_ARGS__)
#define DCVLOG_AFTER_N(n, vlevel, ...) if (ELPP_DEBUG_LOG) CVLOG_AFTER_N(n, vlevel, __VA_ARGS__)
#define DCLOG_N_TIMES(n, LEVEL, ...) if (ELPP_DEBUG_LOG) CLOG_N_TIMES(n, LEVEL, __VA_ARGS__)
#define DCVLOG_N_TIMES(n, vlevel, ...) if (ELPP_DEBUG_LOG) CVLOG_N_TIMES(n, vlevel, __VA_ARGS__)
//
// Default Debug Only Loggers macro using CLOG(), CLOG_VERBOSE() and CVLOG() macros
//
// undef existing
#undef DLOG
#undef DVLOG
#undef DLOG_IF
#undef DVLOG_IF
#undef DLOG_EVERY_N
#undef DVLOG_EVERY_N
#undef DLOG_AFTER_N
#undef DVLOG_AFTER_N
#undef DLOG_N_TIMES
#undef DVLOG_N_TIMES
// Normal logs
#define DLOG(LEVEL) DCLOG(LEVEL, ELPP_CURR_FILE_LOGGER_ID)
#define DVLOG(vlevel) DCVLOG(vlevel, ELPP_CURR_FILE_LOGGER_ID)
// Conditional logs
#define DLOG_IF(condition, LEVEL) DCLOG_IF(condition, LEVEL, ELPP_CURR_FILE_LOGGER_ID)
#define DVLOG_IF(condition, vlevel) DCVLOG_IF(condition, vlevel, ELPP_CURR_FILE_LOGGER_ID)
// Hit counts based logs
#define DLOG_EVERY_N(n, LEVEL) DCLOG_EVERY_N(n, LEVEL, ELPP_CURR_FILE_LOGGER_ID)
#define DVLOG_EVERY_N(n, vlevel) DCVLOG_EVERY_N(n, vlevel, ELPP_CURR_FILE_LOGGER_ID)
#define DLOG_AFTER_N(n, LEVEL) DCLOG_AFTER_N(n, LEVEL, ELPP_CURR_FILE_LOGGER_ID)
#define DVLOG_AFTER_N(n, vlevel) DCVLOG_AFTER_N(n, vlevel, ELPP_CURR_FILE_LOGGER_ID)
#define DLOG_N_TIMES(n, LEVEL) DCLOG_N_TIMES(n, LEVEL, ELPP_CURR_FILE_LOGGER_ID)
#define DVLOG_N_TIMES(n, vlevel) DCVLOG_N_TIMES(n, vlevel, ELPP_CURR_FILE_LOGGER_ID)
// Check macros
#undef CCHECK
#undef CPCHECK
#undef CCHECK_EQ
#undef CCHECK_NE
#undef CCHECK_LT
#undef CCHECK_GT
#undef CCHECK_LE
#undef CCHECK_GE
#undef CCHECK_BOUNDS
#undef CCHECK_NOTNULL
#undef CCHECK_STRCASEEQ
#undef CCHECK_STRCASENE
#undef CHECK
#undef PCHECK
#undef CHECK_EQ
#undef CHECK_NE
#undef CHECK_LT
#undef CHECK_GT
#undef CHECK_LE
#undef CHECK_GE
#undef CHECK_BOUNDS
#undef CHECK_NOTNULL
#undef CHECK_STRCASEEQ
#undef CHECK_STRCASENE
#define CCHECK(condition, ...) CLOG_IF(!(condition), FATAL, __VA_ARGS__) << "Check failed: [" << #condition << "] "
#define CPCHECK(condition, ...) CPLOG_IF(!(condition), FATAL, __VA_ARGS__) << "Check failed: [" << #condition << "] "
#define CHECK(condition) CCHECK(condition, ELPP_CURR_FILE_LOGGER_ID)
#define PCHECK(condition) CPCHECK(condition, ELPP_CURR_FILE_LOGGER_ID)
#define CCHECK_EQ(a, b, ...) CCHECK(a == b, __VA_ARGS__)
#define CCHECK_NE(a, b, ...) CCHECK(a != b, __VA_ARGS__)
#define CCHECK_LT(a, b, ...) CCHECK(a < b, __VA_ARGS__)
#define CCHECK_GT(a, b, ...) CCHECK(a > b, __VA_ARGS__)
#define CCHECK_LE(a, b, ...) CCHECK(a <= b, __VA_ARGS__)
#define CCHECK_GE(a, b, ...) CCHECK(a >= b, __VA_ARGS__)
#define CCHECK_BOUNDS(val, min, max, ...) CCHECK(val >= min && val <= max, __VA_ARGS__)
#define CHECK_EQ(a, b) CCHECK_EQ(a, b, ELPP_CURR_FILE_LOGGER_ID)
#define CHECK_NE(a, b) CCHECK_NE(a, b, ELPP_CURR_FILE_LOGGER_ID)
#define CHECK_LT(a, b) CCHECK_LT(a, b, ELPP_CURR_FILE_LOGGER_ID)
#define CHECK_GT(a, b) CCHECK_GT(a, b, ELPP_CURR_FILE_LOGGER_ID)
#define CHECK_LE(a, b) CCHECK_LE(a, b, ELPP_CURR_FILE_LOGGER_ID)
#define CHECK_GE(a, b) CCHECK_GE(a, b, ELPP_CURR_FILE_LOGGER_ID)
#define CHECK_BOUNDS(val, min, max) CCHECK_BOUNDS(val, min, max, ELPP_CURR_FILE_LOGGER_ID)
namespace el {
	namespace base {
		namespace utils {
			template <typename T>
			static T* checkNotNull(T* ptr, const char* name, const char* loggers, ...)
			{
				CLOG_IF(ptr == nullptr, FATAL, loggers) << "Check failed: [" << name << " != nullptr]";
				return ptr;
			}
		}  // namespace utils
	}  // namespace base
}  // namespace el
#define CCHECK_NOTNULL(ptr, ...) el::base::utils::checkNotNull(ptr, #ptr, __VA_ARGS__)
#define CCHECK_STREQ(str1, str2, ...) CLOG_IF(!el::base::utils::Str::cStringEq(str1, str2), FATAL, __VA_ARGS__) \
                        << "Check failed: [" << #str1 << " == " << #str2 << "] "
#define CCHECK_STRNE(str1, str2, ...) CLOG_IF(el::base::utils::Str::cStringEq(str1, str2), FATAL, __VA_ARGS__) \
                        << "Check failed: [" << #str1 << " != " << #str2 << "] "
#define CCHECK_STRCASEEQ(str1, str2, ...) CLOG_IF(!el::base::utils::Str::cStringCaseEq(str1, str2), FATAL, __VA_ARGS__) \
                        << "Check failed: [" << #str1 << " == " << #str2 << "] "
#define CCHECK_STRCASENE(str1, str2, ...) CLOG_IF(el::base::utils::Str::cStringCaseEq(str1, str2), FATAL, __VA_ARGS__) \
                        << "Check failed: [" << #str1 << " != " << #str2 << "] "
#define CHECK_NOTNULL(ptr) CCHECK_NOTNULL(ptr, ELPP_CURR_FILE_LOGGER_ID)
#define CHECK_STREQ(str1, str2) CCHECK_STREQ(str1, str2, ELPP_CURR_FILE_LOGGER_ID)
#define CHECK_STRNE(str1, str2) CCHECK_STRNE(str1, str2, ELPP_CURR_FILE_LOGGER_ID)
#define CHECK_STRCASEEQ(str1, str2) CCHECK_STRCASEEQ(str1, str2, ELPP_CURR_FILE_LOGGER_ID)
#define CHECK_STRCASENE(str1, str2) CCHECK_STRCASENE(str1, str2, ELPP_CURR_FILE_LOGGER_ID)
#undef DCCHECK
#undef DCCHECK_EQ
#undef DCCHECK_NE
#undef DCCHECK_LT
#undef DCCHECK_GT
#undef DCCHECK_LE
#undef DCCHECK_GE
#undef DCCHECK_BOUNDS
#undef DCCHECK_NOTNULL
#undef DCCHECK_STRCASEEQ
#undef DCCHECK_STRCASENE
#undef DCPCHECK
#undef DCHECK
#undef DCHECK_EQ
#undef DCHECK_NE
#undef DCHECK_LT
#undef DCHECK_GT
#undef DCHECK_LE
#undef DCHECK_GE
#undef DCHECK_BOUNDS_
#undef DCHECK_NOTNULL
#undef DCHECK_STRCASEEQ
#undef DCHECK_STRCASENE
#undef DPCHECK
#define DCCHECK(condition, ...) if (ELPP_DEBUG_LOG) CCHECK(condition, __VA_ARGS__)
#define DCCHECK_EQ(a, b, ...) if (ELPP_DEBUG_LOG) CCHECK_EQ(a, b, __VA_ARGS__)
#define DCCHECK_NE(a, b, ...) if (ELPP_DEBUG_LOG) CCHECK_NE(a, b, __VA_ARGS__)
#define DCCHECK_LT(a, b, ...) if (ELPP_DEBUG_LOG) CCHECK_LT(a, b, __VA_ARGS__)
#define DCCHECK_GT(a, b, ...) if (ELPP_DEBUG_LOG) CCHECK_GT(a, b, __VA_ARGS__)
#define DCCHECK_LE(a, b, ...) if (ELPP_DEBUG_LOG) CCHECK_LE(a, b, __VA_ARGS__)
#define DCCHECK_GE(a, b, ...) if (ELPP_DEBUG_LOG) CCHECK_GE(a, b, __VA_ARGS__)
#define DCCHECK_BOUNDS(val, min, max, ...) if (ELPP_DEBUG_LOG) CCHECK_BOUNDS(val, min, max, __VA_ARGS__)
#define DCCHECK_NOTNULL(ptr, ...) if (ELPP_DEBUG_LOG) CCHECK_NOTNULL(ptr, __VA_ARGS__)
#define DCCHECK_STREQ(str1, str2, ...) if (ELPP_DEBUG_LOG) CCHECK_STREQ(str1, str2, __VA_ARGS__)
#define DCCHECK_STRNE(str1, str2, ...) if (ELPP_DEBUG_LOG) CCHECK_STRNE(str1, str2, __VA_ARGS__)
#define DCCHECK_STRCASEEQ(str1, str2, ...) if (ELPP_DEBUG_LOG) CCHECK_STRCASEEQ(str1, str2, __VA_ARGS__)
#define DCCHECK_STRCASENE(str1, str2, ...) if (ELPP_DEBUG_LOG) CCHECK_STRCASENE(str1, str2, __VA_ARGS__)
#define DCPCHECK(condition, ...) if (ELPP_DEBUG_LOG) CPCHECK(condition, __VA_ARGS__)
#define DCHECK(condition) DCCHECK(condition, ELPP_CURR_FILE_LOGGER_ID)
#define DCHECK_EQ(a, b) DCCHECK_EQ(a, b, ELPP_CURR_FILE_LOGGER_ID)
#define DCHECK_NE(a, b) DCCHECK_NE(a, b, ELPP_CURR_FILE_LOGGER_ID)
#define DCHECK_LT(a, b) DCCHECK_LT(a, b, ELPP_CURR_FILE_LOGGER_ID)
#define DCHECK_GT(a, b) DCCHECK_GT(a, b, ELPP_CURR_FILE_LOGGER_ID)
#define DCHECK_LE(a, b) DCCHECK_LE(a, b, ELPP_CURR_FILE_LOGGER_ID)
#define DCHECK_GE(a, b) DCCHECK_GE(a, b, ELPP_CURR_FILE_LOGGER_ID)
#define DCHECK_BOUNDS(val, min, max) DCCHECK_BOUNDS(val, min, max, ELPP_CURR_FILE_LOGGER_ID)
#define DCHECK_NOTNULL(ptr) DCCHECK_NOTNULL(ptr, ELPP_CURR_FILE_LOGGER_ID)
#define DCHECK_STREQ(str1, str2) DCCHECK_STREQ(str1, str2, ELPP_CURR_FILE_LOGGER_ID)
#define DCHECK_STRNE(str1, str2) DCCHECK_STRNE(str1, str2, ELPP_CURR_FILE_LOGGER_ID)
#define DCHECK_STRCASEEQ(str1, str2) DCCHECK_STRCASEEQ(str1, str2, ELPP_CURR_FILE_LOGGER_ID)
#define DCHECK_STRCASENE(str1, str2) DCCHECK_STRCASENE(str1, str2, ELPP_CURR_FILE_LOGGER_ID)
#define DPCHECK(condition) DCPCHECK(condition, ELPP_CURR_FILE_LOGGER_ID)
#if defined(ELPP_DISABLE_DEFAULT_CRASH_HANDLING)
#   define ELPP_USE_DEF_CRASH_HANDLER false
#else
#   define ELPP_USE_DEF_CRASH_HANDLER true
#endif  // defined(ELPP_DISABLE_DEFAULT_CRASH_HANDLING)
#define ELPP_CRASH_HANDLER_INIT
#define ELPP_INIT_EASYLOGGINGPP(val)\
    ELPP_INITI_BASIC_DECLR\
    namespace el {\
        namespace base {\
            el::base::type::StoragePointer elStorage(val);\
        }\
        el::base::debug::CrashHandler elCrashHandler(ELPP_USE_DEF_CRASH_HANDLER);\
    }

#if ELPP_ASYNC_LOGGING
#   define INITIALIZE_EASYLOGGINGPP\
       ELPP_INIT_EASYLOGGINGPP(new el::base::Storage(el::LogBuilderPtr(new el::base::DefaultLogBuilder()),\
                                                          new el::base::AsyncDispatchWorker()))\

#else
#   define INITIALIZE_EASYLOGGINGPP\
       ELPP_INIT_EASYLOGGINGPP(new el::base::Storage(el::LogBuilderPtr(new el::base::DefaultLogBuilder())))
#endif  // ELPP_ASYNC_LOGGING
#define INITIALIZE_NULL_EASYLOGGINGPP\
    ELPP_INITI_BASIC_DECLR\
    namespace el {\
        namespace base {\
            el::base::type::StoragePointer elStorage;\
        }\
        el::base::debug::CrashHandler elCrashHandler(ELPP_USE_DEF_CRASH_HANDLER);\
    }
// NOTE: no ELPP_INITI_BASIC_DECLR when sharing - causes double free corruption on external symbols
#define SHARE_EASYLOGGINGPP(initializedStorage)\
    namespace el {\
        namespace base {\
            el::base::type::StoragePointer elStorage(initializedStorage);\
        }\
        el::base::debug::CrashHandler elCrashHandler(ELPP_USE_DEF_CRASH_HANDLER);\
    }

#if defined(ELPP_UNICODE)
#   define START_EASYLOGGINGPP(argc, argv) el::Helpers::setArgs(argc, argv); std::locale::global(std::locale(""))
#else
#   define START_EASYLOGGINGPP(argc, argv) el::Helpers::setArgs(argc, argv)
#endif  // defined(ELPP_UNICODE)
#endif // EASYLOGGINGPP_H