...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 handle.
boost::system::error_code cancel( boost::system::error_code & ec);
This function causes all outstanding asynchronous read or write operations to finish immediately, and the handlers for cancelled operations will be passed the boost::asio::error::operation_aborted error.
Set to indicate what error occurred, if any.