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Date: Sun, 21 Mar 2010 11:59:28 -0400
From: Pierre-Luc Drouin <pldrouin@pldrouin.net>
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Subject: Portable Conditional Wait for Inter-Process?
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Hi,

I am looking for a portable solution to put a process into a timed wait 
(a la pthread_cond_timedwait) such that it can be waken up by another 
process using something similar to pthread_cond_broadcast (there might 
be many waiters). I guess shared pthread condition variables are not 
supported by FreeBSD, right? Is there a portable way to do this? The 
only solution I can think of right now is to use  alarm and sigwait on 
the waiters side and kill(wpid,SIGCONT) on the other side with a list of 
pids.

Thanks!