...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Constructor.
basic_deadline_timer( boost::asio::io_service & io_service);
This constructor creates a timer without setting an expiry time. The expires_at() or expires_from_now() functions must be called to set an expiry time before the timer can be waited on.
The io_service object that the timer will use to dispatch handlers for any asynchronous operations performed on the timer.