...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Place the acceptor into the state where it will listen for new connections.
void listen( int backlog = socket_base::max_connections); boost::system::error_code listen( int backlog, boost::system::error_code & ec);