Boost C++ Libraries

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

This is an older version of Boost and was released in 2014. The current version is 1.89.0.

io_service::run_one

io_service::run_one

Run the io_service object's event processing loop to execute at most one handler.

std::size_t run_one();
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std::size_t run_one(
    boost::system::error_code & ec);
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