utils/logger.hpp

#ifndef UTILS_LOGGER_HPP__
#define UTILS_LOGGER_HPP__ 1

#include <cstdio>
#include <cstdarg>
#include <mutex>

namespace utils {
    class Logger {
    private:
        FILE* m_file;
        std::recursive_mutex m_mutex;
        bool m_newline;

        void linestart();

    public:
        Logger() = delete;
        explicit Logger( char const* path );
        Logger( Logger const& ) = delete;
        Logger( Logger&& ) = delete;
        ~Logger();

        void writeraw( char const* str );
        __attribute__(( __format__( gnu_printf, 2, 0 ) )) void vwrite( char const* format, va_list args );
        __attribute__(( __format__( gnu_printf, 2, 3 ) )) void write( char const* format, ... );
        __attribute__(( __format__( gnu_printf, 2, 0 ) )) void vwriteln( char const* format, va_list args );
        __attribute__(( __format__( gnu_printf, 2, 3 ) )) void writeln( char const* format, ... );
        void writeln();
        void flush();
        void lock();
        void unlock();
    };

    Logger& MainLogger();
}

#define LOG( ... ) ( \
        utils::MainLogger().lock() , \
        utils::MainLogger().write( "[%48s:%24s@%4i]\t", __FILE__, __FUNCTION__, __LINE__ ) , \
        utils::MainLogger().writeln( __VA_ARGS__ ) , \
        utils::MainLogger().unlock() \
    )

#endif