(`simgrid::s4u::Mutex` can be used with
[`std::lock`](http://en.cppreference.com/w/cpp/thread/lock),
[`std::unique_lock`](http://en.cppreference.com/w/cpp/thread/unique_lock),
etc.).
(`simgrid::s4u::Mutex` can be used with
[`std::lock`](http://en.cppreference.com/w/cpp/thread/lock),
[`std::unique_lock`](http://en.cppreference.com/w/cpp/thread/unique_lock),
etc.).