##### basic_socket_acceptor::listen (2 of 2 overloads)

Place the acceptor into the state where it will listen for new connections.

    void listen(
        int backlog,
        asio::error_code & ec);

This function puts the socket acceptor into the state where it may accept new connections.

###### Parameters

backlog

  The maximum length of the queue of pending connections.

ec

  Set to indicate what error occurred, if any.

###### Example

    asio::ip::tcp::acceptor acceptor(io_context);
    ...
    asio::error_code ec;
    acceptor.listen(asio::socket_base::max_listen_connections, ec);
    if (ec)
    {
      // An error occurred.
    }