Backgroundrb devel - Mar 2007 - Timeout ?

Hello folks,

I''m looking for a way to stop my workers after a certain amount of time
(a timeout). I''m not finding any good tutorial on this subject (just 
this thread 
http://rubyforge.org/pipermail/backgroundrb-devel/2006-December/thread.html#600 
).
How do you guys implement a timeout mechanisme in your backgroundrb worker ?

Thanks in advance,

++

yk