logger.hpp File Reference

Class definitions and MACROs for logging purposes. More...

#include <string>
#include <iostream>
#include <sstream>
#include <mutex>

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Classes
class	vmcmc::Logger
	A simple MACRO-focussed logging facility. More...
struct	vmcmc::Logger::Location
	A simple struct used by the Logger macros to pass information about the filename and line number. More...

Macros
#define	STRINGIFY(x)   #x
#define	TOSTRING(x)   STRINGIFY(x)
#define	__FILE_LINE__   __FILE__ " (" TOSTRING(__LINE__) ")"
#define	__FILENAME_LINE__   (strrchr(__FILE__, '/') ? strrchr(__FILE_LINE__, '/') + 1 : __FILE_LINE__)
#define	__FUNC__   ""
#define	va_num_args(...)   va_num_args_impl(__VA_ARGS__, 5,4,3,2,1)
#define	va_num_args_impl(_1, _2, _3, _4, _5, N, ...)   N
#define	macro_dispatcher(func, ...)   macro_dispatcher_(func, va_num_args(__VA_ARGS__))
#define	macro_dispatcher_(func, nargs)   macro_dispatcher__(func, nargs)
#define	macro_dispatcher__(func, nargs)   func ## nargs
#define	__LOG_LOCATION   vmcmc::Logger::Location(__FILE__, __FUNC__, __LINE__)
#define	__LOG_DEFINE_2(I, K)   static vmcmc::Logger I(K);
#define	__LOG_DEFINE_1(K)   static vmcmc::Logger sLocalLoggerInstance(K);
#define	__LOG_3(I, L, M)
#define	__LOG_ONCE_3(I, L, M)
#define	__LOG_ASSERT_3(I, C, M)
#define	__LOG_2(L, M)   __LOG_3(sLocalLoggerInstance,L,M)
#define	__LOG_1(M)   __LOG_3(sLocalLoggerInstance,Debug,M)
#define	__LOG_ONCE_2(L, M)   __LOG_ONCE_3(sLocalLoggerInstance,L,M)
#define	__LOG_ONCE_1(M)   __LOG_ONCE_3(sLocalLoggerInstance,Debug,M)
#define	__LOG_ASSERT_1(C)   __LOG_ASSERT_3(sLocalLoggerInstance,C,"")
#define	__LOG_ASSERT_2(C, M)   __LOG_ASSERT_3(sLocalLoggerInstance,C,M)
#define	LOG_DEFINE(...)   macro_dispatcher(__LOG_DEFINE_, __VA_ARGS__)(__VA_ARGS__)
#define	LOG(...)   macro_dispatcher(__LOG_, __VA_ARGS__)(__VA_ARGS__)
#define	LOG_ONCE(...)   macro_dispatcher(__LOG_ONCE_, __VA_ARGS__)(__VA_ARGS__)
#define	LOG_ASSERT(...)   macro_dispatcher(__LOG_ASSERT_, __VA_ARGS__)(__VA_ARGS__)

Detailed Description

Class definitions and MACROs for logging purposes.

Copyright

Copyright 2016 Marco Kleesiek. Released under the GNU Lesser General Public License v3.

Date

25.07.2016

Author

marco.nosp@m.@kle.nosp@m.esiek.nosp@m..com

Macro Definition Documentation

#define __LOG_3	(		I,
			L,
			M
	)

Value:

{ \
    if (I.IsLevelEnabled(vmcmc::Logger::ELevel::L)) { \
        std::lock_guard<std::mutex> _logLock(I.GetMutex()); \
        I.StartMessage(vmcmc::Logger::ELevel::L, __LOG_LOCATION); \
        I.Log() << M; \
        I.EndMessage(); \
    } \
}

#define __LOG_ASSERT_3	(		I,
			C,
			M
	)

Value:

{ \
    if (I.IsLevelEnabled(vmcmc::Logger::ELevel::Debug) && !(C)) { \
        std::lock_guard<std::mutex> _logLock(I.GetMutex()); \
        I.StartMessage(vmcmc::Logger::ELevel::Fatal, __LOG_LOCATION); \
        I.Log() << "Assertion '(" << TOSTRING(C) << ")' failed. " << M; \
        I.EndMessage(); \
        abort(); \
    } \
}

#define __LOG_ONCE_3	(		I,
			L,
			M
	)

Value:

{ \
    if (I.IsLevelEnabled(vmcmc::Logger::ELevel::L)) { \
        static bool _sLogMarker = false; \
        std::lock_guard<std::mutex> _logLock(I.GetMutex()); \
        if (!_sLogMarker) { \
            _sLogMarker = true; \
            I.StartMessage(vmcmc::Logger::ELevel::L, __LOG_LOCATION); \
            I.Log() << M; \
            I.EndMessage(); \
        } \
    } \
}