...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);
This function puts the socket acceptor into the state where it may accept new connections.
The maximum length of the queue of pending connections.
Thrown on failure.