rainmeter-studio/Library/Logger.h

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/*
Copyright (C) 2013 Birunthan Mohanathas
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef RM_LOGGER_H_
#define RM_LOGGER_H_
#include <Windows.h>
#include <cstdarg>
#include <string>
#include <list>
class Section;
class MeterWindow;
// Singleton class to handle and store log messages and control the log file.
class Logger
{
public:
enum class Level
{
Error = 1,
Warning = 2,
Notice = 3,
Debug = 4
};
struct Entry
{
Level level;
std::wstring timestamp;
std::wstring source;
std::wstring message;
};
static Logger& GetInstance();
typedef void (*LoggerCallback) (Level level, LPCWSTR timestamp, LPCWSTR source, LPCWSTR message);
void SetLogCallback(LoggerCallback callback) { m_LoggerCallback = callback; }
void Log(Level level, const WCHAR* source, const WCHAR* msg);
void LogVF(Level level, const WCHAR* source, const WCHAR* format, va_list args);
void LogMeterWindowVF(Logger::Level level, MeterWindow* meterWindow, const WCHAR* format, va_list args);
void LogSection(Logger::Level level, Section* section, const WCHAR* message);
void LogSectionVF(Logger::Level level, Section* section, const WCHAR* format, va_list args);
const std::list<Entry>& GetEntries() { return m_Entries; }
private:
void LogInternal(Level level, ULONGLONG timestamp, const WCHAR* source, const WCHAR* msg);
Logger();
~Logger();
Logger(const Logger& other) = delete;
Logger& operator=(Logger other) = delete;
bool m_LogToFile;
LoggerCallback m_LoggerCallback;
std::list<Entry> m_Entries;
CRITICAL_SECTION m_CsLog;
CRITICAL_SECTION m_CsLogDelay;
};
// Convenience functions.
inline Logger& GetLogger() { return Logger::GetInstance(); }
#define RM_LOGGER_DEFINE_LOG_FUNCTIONS(name) \
inline void Log ## name(const WCHAR* msg) \
{ \
GetLogger().Log(Logger::Level::name, L"", msg); \
} \
\
inline void Log ## name ## F(const WCHAR* format, ...) \
{ \
va_list args; \
va_start(args, format); \
GetLogger().LogVF(Logger::Level::name, L"", format, args); \
va_end(args); \
} \
\
inline void Log ## name ## F(Section* section, const WCHAR* format, ...) \
{ \
va_list args; \
va_start(args, format); \
GetLogger().LogSectionVF(Logger::Level::name, section, format, args); \
va_end(args); \
} \
\
inline void Log ## name ## F(MeterWindow* meterWindow, const WCHAR* format, ...) \
{ \
va_list args; \
va_start(args, format); \
GetLogger().LogMeterWindowVF(Logger::Level::name, meterWindow, format, args); \
va_end(args); \
}
RM_LOGGER_DEFINE_LOG_FUNCTIONS(Error)
RM_LOGGER_DEFINE_LOG_FUNCTIONS(Warning)
RM_LOGGER_DEFINE_LOG_FUNCTIONS(Notice)
RM_LOGGER_DEFINE_LOG_FUNCTIONS(Debug)
#endif