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Re: pthread problem with latest cygwin dll snapshot
- From: Thomas Pfaff <tpfaff at gmx dot net>
- To: Arash Partow <arashp at hotmail dot com>
- Cc: cygwin at cygwin dot com
- Date: Tue, 28 Oct 2003 13:57:35 +0100
- Subject: Re: pthread problem with latest cygwin dll snapshot
- References: <BAY9-F46Pj9P3efrOP50003160e@hotmail.com>
Arash Partow wrote:
Greetings to Thomas and all others involved in cygwin pthreads
implementation,
I've downloaded the snapshots of cygwin1.dll (cygwin1-20031025.dll.bz2 and
cygwin1-20031027.dll.bz2), I think the prior is the one where Thomas made
changes and in the latter Corinna made changes to semaphores which I don't
how that might effect pthreads. In both cases the stress test can run
successfully under certain circumstances (which for normal application
execution are not acceptable) in-one instance reaching 9million+ thread
creations, however if one tries to do other things like edit a text file or
play an mp3 or some other task, the Thread-Test will crash. In GDB the call
stack shows the last call before the crash was to the cygwin1.dll, also
sometimes if you try to restart the Thread-Test right after it has crashed,
the new instance crashes almost immediately only ever getting up to about
~5000 thread creations.
Hi Arash,
this time i am not able to reproduce your problem.
Before i continue debugging i suggest that you check the return codes of
some pthread API functions first and call the pthread_functions only
with a valid thread id.
For example change
void Thread::start()
{
pthread_create(&threadID,NULL,&(Thread::threadFunction),this);
pthread_detach(threadID);
}
to
void Thread::start()
{
int res;
res = pthread_create(&threadID,NULL,&(Thread::threadFunction),this);
if (res)
setThreadState(THREAD_DEAD);
else
pthread_detach(threadID);
}
Please contact me if this still doesn't help.
Thomas
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