SingleLog is a header only C++14 singleton logging library. It's fast, convenient, compiles on Windows and Linux, and does what it says on the tin.
- By design, trace level logging is only available in debug builds. In release builds the lowest logging level is debug.
Using SingleLog is as easy as this:
#include "singlelog.hpp"
// Configure the logger
void SetupLogging()
{
Uplinkzero::Logging::SingleLog * pLogger = Uplinkzero::Logging::SingleLog::GetInstance();
pLogger->SetConsoleLogLevel(Uplinkzero::Logging::LogLevel::L_INFO);
pLogger->SetFileLogLevel(Uplinkzero::Logging::LogLevel::L_TRACE);
pLogger->SetLogFilePath("example.log");
}
// Logging via a local pointer
void LocalPointerLogging()
{
std::string module = "Local pointer thread";
Uplinkzero::Logging::SingleLog * pLogger = Uplinkzero::Logging::SingleLog::GetInstance();
pLogger->Critical(module, "Critial message");
pLogger->Error(module, "Error message");
pLogger->Warning(module, "Warning message");
pLogger->Notice(module, "Notice message");
pLogger->Info(module, "Info message");
pLogger->Debug(module, "Debug message");
pLogger->Trace(module, "Trace message");
}
// Logging with macros. This is the recommended logging option.
void MacroLogging()
{
std::string module = "MACRO thread";
LOG_TRACE_FUNCTION();
LOG_CRITICAL(module, "Critial message");
LOG_ERROR(module, "Error message");
LOG_WARNING(module, "Warning message");
LOG_NOTICE(module, "Notice message");
LOG_INFO(module, "Info message");
LOG_DEBUG(module, "Debug message");
LOG_TRACE(module, "Trace message");
}
int main()
{
SetupLogging();
std::thread t1(LocalPointerLogging);
std::thread t2(MacroLogging);
t1.join();
t2.join();
return 0;
}Which, when run will produce the following in the console:
2010-12-01 13:01:12 <CRITICAL> Local pointer thread: Critial message
2010-12-01 13:01:12 <ERROR> Local pointer thread: Error message
2010-12-01 13:01:12 <CRITICAL> MACRO thread: Critial message
2010-12-01 13:01:12 <WARNING> Local pointer thread: Warning message
2010-12-01 13:01:12 <NOTICE> Local pointer thread: Notice message
2010-12-01 13:01:12 <ERROR> MACRO thread: Error message
2010-12-01 13:01:12 <INFO> Local pointer thread: Info message
2010-12-01 13:01:12 <WARNING> MACRO thread: Warning message
2010-12-01 13:01:12 <NOTICE> MACRO thread: Notice message
2010-12-01 13:01:12 <INFO> MACRO thread: Info message
And the following in the log file "example.log":
2010-12-01 13:01:12 <TRACE> FunctionTrace: ---> Entering function: MacroLogging
2010-12-01 13:01:12 <CRITICAL> Local pointer thread: Critial message
2010-12-01 13:01:12 <ERROR> Local pointer thread: Error message
2010-12-01 13:01:12 <CRITICAL> MACRO thread: Critial message
2010-12-01 13:01:12 <WARNING> Local pointer thread: Warning message
2010-12-01 13:01:12 <NOTICE> Local pointer thread: Notice message
2010-12-01 13:01:12 <ERROR> MACRO thread: Error message
2010-12-01 13:01:12 <INFO> Local pointer thread: Info message
2010-12-01 13:01:12 <WARNING> MACRO thread: Warning message
2010-12-01 13:01:12 <DEBUG> Local pointer thread: Debug message
2010-12-01 13:01:12 <NOTICE> MACRO thread: Notice message
2010-12-01 13:01:12 <TRACE> Local pointer thread: Trace message
2010-12-01 13:01:12 <INFO> MACRO thread: Info message
2010-12-01 13:01:12 <DEBUG> MACRO thread: Debug message
2010-12-01 13:01:12 <TRACE> MACRO thread: Trace message
2010-12-01 13:01:12 <TRACE> FunctionTrace: <--- Exiting function: MacroLogging
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