Function gio_sys::g_socket_send_message

pub unsafe extern fn g_socket_send_message(socket: *mut GSocket,
                                           address: *mut GSocketAddress,
                                           vectors: *mut GOutputVector,
                                           num_vectors: c_int,
                                           messages: *mut *mut GSocketControlMessage,
                                           num_messages: c_int,
                                           flags: c_int,
                                           cancellable: *mut GCancellable,
                                           error: *mut *mut GError)
                                           -> ssize_t