...one of the most highly
regarded and expertly designed C++ library projects in the
world. — Herb Sutter and Andrei
Cancel all asynchronous operations associated with the acceptor.
boost::system::error_code cancel( boost::system::error_code & ec);
This function causes all outstanding asynchronous connect, send and receive
operations to finish immediately, and the handlers for cancelled operations
will be passed the
Set to indicate what error occurred, if any.