Major Refactoring v2.0

1 files changed, 6667 insertions, 0 deletions

diff --git a/contrib/src/easylogging++.h b/contrib/src/easylogging++.h
new file mode 100644
index 0000000..9bf18fd
--- /dev/null
+++ b/contrib/src/easylogging++.h
@@ -0,0 +1,6667 @@
+//
+//  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 getSizeOfFile(base::type::fstream_t* fs) {
+        if (fs == nullptr) {
+            return 0;
+        }
+        std::streampos currPos = fs->tellg();
+        fs->seekg(0, fs->end);
+        std::size_t size = static_cast<std::size_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::not1(std::ptr_fun<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::not1(std::ptr_fun<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 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;
+
+    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);
+            }
+        }
+        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);
+    }
+
+    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 currFileSize = base::utils::File::getSizeOfFile(fs);
+        if (maxLogFileSize != 0 && currFileSize >= 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;
+        }
+        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;
+    }
+    
+    operator bool() {
+        return true;
+    }
+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
\ No newline at end of file