Detecting if the main loop is running

Is there a way to detect if my code is running as a result of
bonobo_main() having been called. I am thinking about an equivalent of
gtk_main_level() in GTK+.

Looking at the code, bonobo_main() uses the g_main_loop_* functions and
does not expose the GMainLoop structure (not unreasonable) or depth
count (possibly less reasonable) at all. So I am guessing the answer is
"no", but maybe I am overlooking something.

Cheers,
Malcolm