Hiding internal DBUS use inside a library

[Colin Walters]

On Thu, 2005-08-25 at 23:07 +0200, Lennart Poettering wrote:
> On Thu, 25.08.05 16:44, Havoc Pennington (hp at redhat.com) wrote:
> 
> > With GNOME apps, set_timeout_functions() will always be called by the
> > GLib main loop stuff, and set_max_received_size() would never be called
> > (it's a specialized function used only by the message bus).
> 
> Wrong. Our client library for the avahi mdns/dns-sd responder tries to
> abstract DBUS from the user. Hence it WILL call
> set_{timeout,watch}_functions(), even when used by Gnome apps.

This is confusing to me - what arguments does it give to those
functions?  Is it using an internal mainloop or something?
Why is it useful to call those functions if the application is using a
GLib mainloop?
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