Standard C++11 threading classes implementation, which are currently still missing on MinGW GCC.
This is a header-only library. To use, just include the corresponding mingw.xxx.h file, where xxx would be the name of the standard header that you would normally include. For additional mutex helper classes, such as std::scoped_guard or std::unique_lock, you need to include <mutex> before including mingw.mutex.h
This code has been developed with MinGW64 4.8.2, but should work with any other MinGW version that has C++11 support for lambda functions, variadic templates, and has working mutex helper classes in <mutex>
It seems that for cross-platform threading implementation, the GCC standard library relies on the gthreads library. If this library is not available, as is the case with MinGW, the std::thread, std::mutex, std::condition_variable are not defined. However, higher-level mutex helper classes are still defined in <mutex> and are usable. Hence, this implementation does not re-define them, and to use these helpers, you should include <mutex> as well, as explained in the usage section.