out of curiosity: is that a general suggestion about the snapshots or one related to my problem?
On Tuesday 30 December 2003 03:19, Phil Thompson wrote: > Version numbers? > > If you are not already doing so I'd suggest using the latest SIP v4 and > PyQt snapshots. > > Phil > > On Monday 29 December 2003 7:47 am, Patrick Stinson wrote: > > I'm using alsa's rawmidi interface to read midi messages from hardware, > > then pumping them to my qt application code. The problem thus far has > > been dealing with the higher (~50-100/sec) volumes of messages received > > in a dedicated thread, and integrating them safely into the main qt event > > thread. > > > > My midi class has a blocking read method that produces messages. a python > > thread is created to call it, and messages are put into a Queue.Queue > > object. Another python thread reads from the queue and uses > > QApplication.postEvent to get the message into the qt thread. All is fine > > until I call a method like 'QSlider.setValue' that changes the way a > > widget looks from my overridden QWidget.event() method. I've tried > > setting a single-millisecond timer to generate events in place of the > > midi object, and of course, everything works fine. Why is it that the > > slider dies when the 'events', however proxied, originate in the midi > > thread? > > > > Sometimes I'm getting negative ref counts; what could be left over or > > deleted so fast that python/qt couldn't keep up? > > > > > > here is the simple result from an attempt at a > > [midi thread: Queue.put()] -> > > [dispatch thread: Queue.get(), QApplication.postEvent()] -> > > [qt thread: event(),QEvent.data()] > > > > > > bash-2.05b$ pksampler > > WAD Enabled > > pkaudio: found 4 devices, but only using 1. > > pkaudio: ->> Found device: hw:PCI,0 > > pkaudio: outputs: 2 > > pkaudio: inputs: 2 > > pkaudio: [[loaded device 1]] > > pkaudio: ->> Found device: hw:Extigy,0 > > pkaudio: outputs: 6 > > pkaudio: inputs: 2 > > pkaudio: sample rates: 48000 > > pkaudio: ->> Found device: hw:Extigy,2 > > pkaudio: outputs: 2 > > pkaudio: inputs: 0 > > pkaudio: sample rates: 48000 > > PKSampler: driver buffer size: 2048 > > PKSampler: driver sample rate: 44100 > > PKSampler: All daemons up and running > > WAD: Collecting debugging information... > > WAD: Segmentation fault. > > #12 0x40238247 in __clone() > > #11 0x40030d40 in pthread_start_thread() > > #10 0x080ee9bd in t_bootstrap() > > #9 0x080c2da9 in PyEval_CallObjectWithKeywords() > > #8 0x0805c3fe in PyObject_Call() > > #7 0x080642d3 in instancemethod_call() > > #6 0x0805c3fe in PyObject_Call() > > #5 0x0810d125 in function_call() > > #4 0x080c162f in PyEval_EvalCodeEx() > > #3 0x080bf82f in eval_frame() > > #2 0x080c3119 in call_function() > > #1 0x0810d8d6 in PyCFunction_Call() > > #0 0x417f58b1 in _Z26sipDo_QCustomEvent_setDataP7_objectS0_() > > > > > > -------------------------------------- > > > > > > I've had several horrendous stack traces, but I think the following one > > best suits the extent of my problem... > > > > PKSampler: All daemons up and running > > WAD: Collecting debugging information... > > SegFault: [ C stack trace ] > > > > #50 0x080b9ef4 in PyEval_EvalCode() > > #49 0x080c162f in PyEval_EvalCodeEx() > > #48 0x080bf82f in eval_frame() > > #47 0x080c3119 in call_function() > > #46 0x0810d8d6 in PyCFunction_Call() > > #45 0x418de03b in _Z28sipDo_QApplication_exec_loopP7_objectS0_() > > #44 0x40563b11 in _ZN12QApplication4execEv() > > #43 0x40576928 in _ZN10QEventLoop4execEv() > > #42 0x40576a86 in _ZN10QEventLoop9enterLoopEv() > > #41 0x4050fea4 in _ZN10QEventLoop13processEventsEj() > > #40 0x4055301d in _ZN10QEventLoop14activateTimersEv() > > #39 0x418db9fb in _ZN15sipQApplication6notifyEP7QObjectP6QEvent() > > #38 0x40562cb5 in _ZN12QApplication6notifyEP7QObjectP6QEvent() > > #37 0x405638c5 in _ZN12QApplication14internalNotifyEP7QObjectP6QEvent() > > #36 0x41598b6f in _ZN9sipQTimer5eventEP6QEvent() > > #35 0x405df932 in _ZN6QTimer5eventEP6QEvent() > > #34 0x408da8eb in _ZN6QTimer7timeoutEv() > > #33 0x405be454 in _ZN7QObject15activate_signalEi() > > #32 0x405be620 in > > _ZN7QObject15activate_signalEP15QConnectionListP8QUObject() #31 > > 0x41907334 in _ZN10sipProxyqt9qt_invokeEiP8QUObject() > > #30 0x41523175 in _ZN10sipProxyqt9proxySlotEv() > > #29 0x40019fdf in _Z13sipEmitToSlotP7sipSlotP7_object() > > #28 0x080c2da9 in PyEval_CallObjectWithKeywords() > > #27 0x0805c3fe in PyObject_Call() > > #26 0x080642d3 in instancemethod_call() > > #25 0x0805c3fe in PyObject_Call() > > #24 0x0810d125 in function_call() > > #23 0x080c162f in PyEval_EvalCodeEx() > > #22 0x080bf82f in eval_frame() > > #21 0x080c325b in call_function() > > #20 0x080c3463 in fast_function() > > #19 0x080bf82f in eval_frame() > > #18 0x080c325b in call_function() > > #17 0x080c3463 in fast_function() > > #16 0x080bf82f in eval_frame() > > #15 0x080c3119 in call_function() > > #14 0x0810d8d6 in PyCFunction_Call() > > #13 0x41b4223d in _Z23sipDo_PK_Effect_ControlP7_objectS0_() > > #12 0x40020157 in sipMapCppToSelf() > > #11 0x4001b713 in sipNewCppToSelf() > > #10 0x0805ea92 in PyInstance_New() > > #9 0x080c2da9 in PyEval_CallObjectWithKeywords() > > #8 0x0805c3fe in PyObject_Call() > > #7 0x080642d3 in instancemethod_call() > > #6 0x0805c3fe in PyObject_Call() > > #5 0x0810d125 in function_call() > > #4 0x080c16a8 in PyEval_EvalCodeEx() > > #3 0x08082a95 in _Py_Dealloc() > > #2 0x0810a7c6 in frame_dealloc() > > #1 0x08082a8a in _Py_Dealloc() > > #0 0x08082a1e in _Py_ForgetReference() > > > > pkaudio: buffer thread exiting. > > pkaudio: engine thread exiting. > > PKSampler: All daemons stopped cleanly. > > [40724 refs] > > Fatal Python error: Objects/frameobject.c:403 object at 0x81ff8a4 has > > negative ref count -1 > > WAD: Collecting debugging information... > > WAD: Abort. > > #14 0x08054ca1 in ?() > > #13 0x4017390c in __libc_start_main() > > #12 0x08054d5a in main() > > #11 0x08055638 in Py_Main() > > #10 0x080e5b61 in Py_Finalize() > > #9 0x080e45ca in PyInterpreterState_Clear() > > #8 0x080e4a9c in PyThreadState_Clear() > > #7 0x08082a95 in _Py_Dealloc() > > #6 0x0810a7b6 in frame_dealloc() > > #5 0x0807ec70 in _Py_NegativeRefcount() > > #4 0x080e838b in Py_AtExit() > > #3 0x401885fb in __GI_abort() > > #2 0x40187094 in __GI_raise() > > #1 0x4003386b in __pthread_raise() > > #0 0x401872e1 in __kill() > > > > > > > > _______________________________________________ > > PyKDE mailing list [EMAIL PROTECTED] > > http://mats.imk.fraunhofer.de/mailman/listinfo/pykde > > _______________________________________________ > PyKDE mailing list [EMAIL PROTECTED] > http://mats.imk.fraunhofer.de/mailman/listinfo/pykde _______________________________________________ PyKDE mailing list [EMAIL PROTECTED] http://mats.imk.fraunhofer.de/mailman/listinfo/pykde
