Subj : Re: Semaphores and pthreads
To   : comp.programming.threads
From : Paolo
Date : Tue Jan 11 2005 02:44 pm

Markus Elfring <Markus.Elfring@web.de> wrote:
>> As prev poster said - never mix sema with mutexes, unless you must :).
>> Sema are good for their async safety but this is probably not of
>> interest if you are threads newbie. Just keep them in mind, everyone
>> needs them sometimes :). As their man page says: "This is the only
>> thread synchronization  function  provided  by POSIX threads that is
>> async-signal safe." (This is from SEMAPHORES(3) manpage on Linux).

> More background informations ...
> pthread_cond_wait() versus sem_wait()
> http://groups.google.de/groups?threadm=336DB34B.63DA%40zko.dec.com

Standing on what Vitali Fridman said, posix semaphores can't go under 0 with their own counter.
so i think this is the cause of my problem, right?

Thank you!
Paolo

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