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G3log is an asynchronous logger with support for adding custom made logging sinks. 

G3log is open source and cross-platform. G3logs builds on the asynchronous logger g2log that was released in 2011.  The current release supports dynamic adding of logging sinks and significant performance improvements. 

G3log features compelling functionality such as:

• Logging and design-by-contract framework
• LOG calls are asynchronous to avoid slowing down the LOG calling thread
• LOG calls are thread safe
• Queued LOG entries are flushed to log sinks before exiting so that no entries are lost at shutdown
• Catching and logging of SIGSEGV and other fatal signals ensures controlled shutdown
• On Linux/OSX a caught fatal signal will generate a stack dump to the log
• G3log is cross platform, currently in use on  Windows, various Linux platforms and OSX

G3log can be built with Visual Studio 2013, Clang and GCC4.7 or newer.

Release information can be found at author's blog. See also the project's page on Bitbucket.