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.
}