Boost C++ Application Development Cookbook - Second Edition

How it works...

In short, when a specified amount of time is passed, boost::asio::deadline_timer pushes the task to the instance of boost::asio::io_service class for execution.

All the nasty stuff is inside the run_delayed function:

    template <class Time, class Functor>    static void run_delayed(Time duration_or_time, const Functor& f) {        std::unique_ptr<boost::asio::deadline_timer>         timer( /* ... */ );        boost::asio::deadline_timer& timer_ref = *timer;        timer_ref.async_wait(            detail::timer_task<Functor>(                std::move(timer),                f            )        );    }

The tasks_processor::run_delayed function accepts a timeout and a functor to call after the timeout. In it, a unique pointer to boost::asio::deadline_timer is created. boost::asio::deadline_timer holds platform-specific ...