Replacing evil looping code

Alexander Larsson alexl at
Mon Nov 6 08:25:16 PST 2006

On Mon, 2006-11-06 at 11:03 -0500, Havoc Pennington wrote:

> To get out of this code you either need some more generic 
> block_for_message() feature that blocks (without reentering the main 
> loop) for messages matching some criteria, or you need some way to tell 
> the bus "I'm expecting something to own bus name XYZ, please block all 
> method calls to it as if you had launched something to own XYZ yourself 
> based on a .service file"

Gnome-vfs has some code that just does:

	if (!dbus_connection_send_with_reply (connection->connection,
					      message, &pending_call, timeout)) {
		dbus_message_unref (message);
		return NULL;

	dbus_message_unref (message);
	while (!dbus_pending_call_get_completed (pending_call) &&
	       dbus_connection_read_write_dispatch (connection->connection, -1))

	reply = dbus_pending_call_steal_reply (pending_call);

This is with a non-mainloop private connection, but the approach might
work for you too.

 Alexander Larsson                                            Red Hat, Inc 
                   alexl at    alla at 
He's a war-weary drug-addicted senator fleeing from a secret government 
programme. She's a cold-hearted streetsmart journalist looking for love in all 
the wrong places. They fight crime! 

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