hook for timer based call?

[Chuck Stein <st...@geofusion.com>]

Greetings,
I would like my module to do some housekeeping on a regular basis.  Is 
there a mechanism to have apache call my module on a regular basis, like 
a hook that is called by a timer?  The only other thing I can think of 
is to spawn my own thread that stays alive and does this.

Thanks,
Chuck