Boost C++ Libraries of the most highly regarded and expertly designed C++ library projects in the world. Herb Sutter and Andrei Alexandrescu, C++ Coding Standards



Destructor notifies the io_context that the work is complete.


The destructor is used to inform the io_context that some work has finished. Once the count of unfinished work reaches zero, the io_context object's run() function is permitted to exit.