Start an asynchronous accept.
template< typename SocketService, typename AcceptHandler> void-or-deduced async_accept( basic_socket< protocol_type, SocketService > & peer, endpoint_type & peer_endpoint, AcceptHandler && handler);
This function is used to asynchronously accept a new connection into a socket, and additionally obtain the endpoint of the remote peer. The function call always returns immediately.
The socket into which the new connection will be accepted. Ownership of the peer object is retained by the caller, which must guarantee that it is valid until the handler is called.
An endpoint object into which the endpoint of the remote peer will be written. Ownership of the peer_endpoint object is retained by the caller, which must guarantee that it is valid until the handler is called.
The handler to be called when the accept operation completes. Copies will be made of the handler as required. The function signature of the handler must be:
void handler( const asio::error_code& error // Result of operation. );
Regardless of whether the asynchronous operation completes immediately
or not, the handler will not be invoked from within this function.
Invocation of the handler will be performed in a manner equivalent