Re: [PyKDE] QWaitCondition seems to cause deadlock
On Tuesday 25 May 2004 1:14 pm, Shin-ichi MORITA wrote: > Hi, > > I found another one ... > QThread.wait() dosen't have /ReleaseGIL/ as well. > > I hope this is the last. Thanks - just made it for 3.12. Phil ___ PyKDE mailing list[EMAIL PROTECTED] http://mats.imk.fraunhofer.de/mailman/listinfo/pykde
Re: [PyKDE] QWaitCondition seems to cause deadlock
Hi, I found another one ... QThread.wait() dosen't have /ReleaseGIL/ as well. I hope this is the last. > It > > looks like it's missing > > on QMutex.lock() as well. Tonight's snapshot > should > > be fixed. __ Do You Yahoo!? http://bb.yahoo.co.jp/ ___ PyKDE mailing list[EMAIL PROTECTED] http://mats.imk.fraunhofer.de/mailman/listinfo/pykde
Re: [PyKDE] QWaitCondition seems to cause deadlock
# I sent my name in KANJI. my mistake ... Thank you for your quick response. > > I think that QWaitCondition::wait() must have > /ReleaseGIL/ > > annotation, is that right? > > Reading the documentation, I think you are right. It > looks like it's missing > on QMutex.lock() as well. Tonight's snapshot should > be fixed. Yeah, I think so. > Thanks, > Phil __ Do You Yahoo!? http://bb.yahoo.co.jp/ ___ PyKDE mailing list[EMAIL PROTECTED] http://mats.imk.fraunhofer.de/mailman/listinfo/pykde
Re: [PyKDE] QWaitCondition seems to cause deadlock
On Tuesday 18 May 2004 5:58 pm, 森田 慎一 wrote: > Hi, this is shin. > It's my first time to post to this ml. > > I'm a beginner of PyQt. > PyQt is very exciting!! > But I have a problem on my multi-thread script. > > This script uses Qt thread API, and uses QMutex and > QWaitCondition to synchronize a GUI thread and a worker > thread. > When the worker thread calls QWaitCondition.wait(), GUI > thread also stops running. > It seems to be in deadlock state. > > The worker's code is as follows: > > def postAndWait(self) > mutex.lock() > QApplication::postEvent(receiver, > QCustomEvent(QEvent.User)) > # waits until GUI thread processes the posted event. > condition.wait(mutex) # <-- stops everything!! > mutex.unlock() > > GUI thread processes events as follows: > > def customEvent(self, event) > mutex.lock() > # do something ... > condition.wakeAll() > mutex.unlock() > > I've been at a loss for a few days. > But today I found that Python Global Interpreter Lock > needs to be released and reacquired around blocking > operation according to Python C/API Reference Manual. > And I also found that QWaitCondition::wait() in > qwaitcondition.sip has no annotation while > QThread::sleep() has /ReleaseGIL/ annotation. > > I think that QWaitCondition::wait() must have /ReleaseGIL/ > annotation, is that right? Reading the documentation, I think you are right. It looks like it's missing on QMutex.lock() as well. Tonight's snapshot should be fixed. Thanks, Phil ___ PyKDE mailing list[EMAIL PROTECTED] http://mats.imk.fraunhofer.de/mailman/listinfo/pykde
[PyKDE] QWaitCondition seems to cause deadlock
Hi, this is shin. It's my first time to post to this ml. I'm a beginner of PyQt. PyQt is very exciting!! But I have a problem on my multi-thread script. This script uses Qt thread API, and uses QMutex and QWaitCondition to synchronize a GUI thread and a worker thread. When the worker thread calls QWaitCondition.wait(), GUI thread also stops running. It seems to be in deadlock state. The worker's code is as follows: def postAndWait(self) mutex.lock() QApplication::postEvent(receiver, QCustomEvent(QEvent.User)) # waits until GUI thread processes the posted event. condition.wait(mutex) # <-- stops everything!! mutex.unlock() GUI thread processes events as follows: def customEvent(self, event) mutex.lock() # do something ... condition.wakeAll() mutex.unlock() I've been at a loss for a few days. But today I found that Python Global Interpreter Lock needs to be released and reacquired around blocking operation according to Python C/API Reference Manual. And I also found that QWaitCondition::wait() in qwaitcondition.sip has no annotation while QThread::sleep() has /ReleaseGIL/ annotation. I think that QWaitCondition::wait() must have /ReleaseGIL/ annotation, is that right? __ Do You Yahoo!? http://bb.yahoo.co.jp/ ___ PyKDE mailing list[EMAIL PROTECTED] http://mats.imk.fraunhofer.de/mailman/listinfo/pykde
