Groups > comp.os.linux.development.apps > #561

Re: pthred_con_timewait problem

From	Sergei Organov <osv@javad.com>
Newsgroups	comp.os.linux.development.apps
Subject	Re: pthred_con_timewait problem
Date	2013-01-29 19:58 +0400
Organization	Aioe.org NNTP Server
Message-ID	<ke8ri9$9g0$1@speranza.aioe.org> (permalink)
References	<InRNs.867$OE1.126@newsfe26.iad> <87pq0o10fw.fsf@sapphire.mobileactivedefense.com> <TURNs.86317$LS5.79873@newsfe10.iad>

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ephlodur <ephlodur@linuxmail.org> writes:

> On Tue, 29 Jan 2013 15:19:31 +0000, Rainer Weikusat wrote:
>
>> ephlodur <ephlodur@linuxmail.org> writes:
>> 
>> [...]
>> 
>>>         	_ret = pthread_cond_timedwait(&_event_id, &_m_mutex, &ts);
>>> 			unlock();
>>>
>>> but when ever I make that call it always return with EPERM
>> 
>> According to the UNIX(*) standard,
>> 
>> 	[EPERM]
>> 		The mutex type is PTHREAD_MUTEX_ERRORCHECK or the mutex 
> is a robust
>> 		mutex, and the current thread does not own the mutex.
>> 
>> This would mean that the thread invoking pthread_cond_timedwait didn't
>> lock the _m_mutex mutex.
>
> As show in my code snippet below from my class CEvent the thread is locl 
> before the call...
> lock();//lock in this case is define as a base 
> _ret = pthread_cond_timedwait(&_event_id, &_m_mutex, &ts);
> unlock();

When you ask for help, it's a good idea to provide minimal example that
anyone here can compile and run to reproduce the problem.

When you prepare one, you will probably see what's wrong yourself and
won't need to ask anybody ;-)

-- Sergei.

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Thread

pthred_con_timewait problem ephlodur <ephlodur@linuxmail.org> - 2013-01-29 14:53 +0000
  Re: pthred_con_timewait problem Rainer Weikusat <rweikusat@mssgmbh.com> - 2013-01-29 15:19 +0000
    Re: pthred_con_timewait problem ephlodur <ephlodur@linuxmail.org> - 2013-01-29 15:28 +0000
      Re: pthred_con_timewait problem Sergei Organov <osv@javad.com> - 2013-01-29 19:58 +0400
        Re: pthred_con_timewait problem ephlodur <ephlodur@linuxmail.org> - 2013-01-29 17:30 +0000
          Re: pthred_con_timewait problem Sergei Organov <osv@javad.com> - 2013-01-29 22:44 +0400
            Re: pthred_con_timewait problem ephlodur <ephlodur@linuxmail.org> - 2013-01-30 11:28 +0000
  Re: pthred_con_timewait problem Richard Kettlewell <rjk@greenend.org.uk> - 2013-01-29 16:32 +0000

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