...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Stop the io_service's event processing loop.
void stop();
This function does not block, but instead simply signals the io_service to stop. All invocations of its run() or run_one() member functions should return as soon as possible. Subsequent calls to run(), run_one(), poll() or poll_one() will return immediately until reset() is called.