Mastering C++ Programming

Shared mutex

The shared mutex synchronization primitive supports two modes, namely shared and exclusive. In the shared mode, the shared mutex will allow many threads to share the resource at the same time, without any data race issues. And in the exclusive mode, it works just like regular mutex, that is, it will allow only one thread to access the resource. This is a suitable lock primitive if you have multiple readers that can access the resource safely and you allow only one thread to modify the shared resource. Refer to the chapter on C++17 for more details.