> Cool!  I am concerned about the threading hang though; can you attach gdb
> to the hung process and execute "thread apply all bt", then post the
> results?  Not sure what would be different under FreeBSD vs. Linux as far
> as threading is concerned, but this should give a clue at least.
> 
> Thanks!
> 
> Tim

Hi Tim!

"tqt3/examples/thread/prodcons/"	is the "strage" one:

The progress bars hangs at 98%, both threads stop, and "valgrind --tool=helgrind" says:
prodcons.cpp:334, dubiouse: associated lock is not held by any thread

examples/thread/prodcons/prodcons.cpp, ProdCons::stop(), when I comment out these 6 lines the program works as expected:

void ProdCons::stop()
{
    if (prod && prod->running()) {
	prod->stop();
        condition.wakeAll();
//	prod->wait();
    }

    if (cons && cons->running()) {
	cons->stop();
        condition.wakeAll();
//	cons->wait();
    }

    if ( redraw ) {
	// no point in repainting these buttons so many times is we are looping...
	startbutton->setEnabled(TRUE);
	stopbutton->setEnabled(FALSE);
    }

    stopped = TRUE;
}



And at last your requested gdb output:

(gdb) thread apply all bt
[New Thread 807407000 (LWP 100617/prodcons)]
[New Thread 807406400 (LWP 100468/prodcons)]

Thread 4 (Thread 807406400 (LWP 100468/prodcons)):
#0  0x00000008040598cc in __error () from /lib/libthr.so.3
#1  0x0000000804057d8e in _pthread_cond_wait () from /lib/libthr.so.3
#2  0x0000000800c0f8db in TQThread::wait (this=0x807562a30, time=18446744073709551615) at kernel/qthread_unix.cpp:117
#3  0x0000000000407230 in ProdCons::stop (this=0x7fffffffe650) at ntqgarray.h:76
#4  0x0000000000407470 in ProdCons::customEvent (this=0x7fffffffe650, e=0x807c289a0) at ntqgarray.h:76
#5  0x0000000800c842e5 in TQObject::event (this=0x7fffffffe650, e=0x807c289a0) at ntqcstring.h:61
#6  0x0000000800ccc709 in TQWidget::event (this=0x7fffffffe650, e=0x807c289a0) at kernel/qwidget.cpp:489
#7  0x0000000800c1cf08 in TQApplication::internalNotify (this=0x7fffffffe5c0, receiver=0x7fffffffe650, e=0x807c289a0)
    at ntqcstring.h:61
#8  0x0000000800c1c699 in TQApplication::notify (this=0x7fffffffe5c0, receiver=0x7fffffffe650, e=0x807c289a0) at ntqcstring.h:61
#9  0x0000000800c1b815 in TQApplication::sendEvent (receiver=0x7fffffffe650, event=0x807c289a0) at ntqcstring.h:61
#10 0x0000000800c1e1b4 in TQApplication::sendPostedEvents (receiver=0x0, event_type=0) at ntqcstring.h:61
#11 0x0000000800c1dedf in TQApplication::sendPostedEvents () at ntqcstring.h:61
#12 0x0000000800beeff4 in TQEventLoop::processEvents (this=0x80743de20, flags=4) at kernel/qeventloop_x11.cpp:82
#13 0x0000000800c3255c in TQEventLoop::enterLoop (this=0x80743de20) at kernel/qeventloop.cpp:115
#14 0x0000000800c3242d in TQEventLoop::exec (this=0x80743de20) at kernel/qeventloop.cpp:115
#15 0x0000000800c1d0b9 in TQApplication::exec (this=0x7fffffffe5c0) at ntqcstring.h:61
#16 0x00000000004075ca in main (argc=1, argv=0x7fffffffe800) at ntqgarray.h:76

Thread 3 (Thread 807407000 (LWP 100617/prodcons)):
#0  0x00000008040598cc in __error () from /lib/libthr.so.3
#1  0x00000008040547f4 in pthread_mutex_destroy () from /lib/libthr.so.3
#2  0x0000000800fa629c in TQRealMutexPrivate::lock (this=0x80752ca80) at tools/qmutex_unix.cpp:126
#3  0x0000000800fa653f in TQMutex::lock (this=0x8074ec6b0) at tools/qmutex_unix.cpp:126
#4  0x0000000800bf00fa in TQMutexLocker::TQMutexLocker (this=0x7fffffbfdeb0, m=0x8074ec6b0) at gthr-default.h:218
#5  0x0000000800c1e964 in TQApplication::threadTerminationHandler (originThread=0x807562a00) at ntqcstring.h:61
#6  0x0000000800c0edc3 in TQThreadInstance::finish () at kernel/qthread_unix.cpp:117
#7  0x00000008040597a0 in __pthread_cleanup_pop_imp () from /lib/libthr.so.3
#8  0x0000000800c0ed53 in TQThreadInstance::start (_arg=0x80752ace8) at kernel/qthread_unix.cpp:117
#9  0x000000080404e4f5 in pthread_create () from /lib/libthr.so.3
#10 0x0000000000000000 in ?? ()

Thread 2 (Thread 807407400 (LWP 100618/prodcons)):
#0  0x00000008040598ca in __error () from /lib/libthr.so.3
#1  0x00000008040547f4 in pthread_mutex_destroy () from /lib/libthr.so.3
#2  0x0000000800fa629c in TQRealMutexPrivate::lock (this=0x80752ca80) at tools/qmutex_unix.cpp:126
#3  0x0000000800fa653f in TQMutex::lock (this=0x8074ec6b0) at tools/qmutex_unix.cpp:126
#4  0x0000000800bf00fa in TQMutexLocker::TQMutexLocker (this=0x7fffff9fceb0, m=0x8074ec6b0) at gthr-default.h:218
#5  0x0000000800c1e964 in TQApplication::threadTerminationHandler (originThread=0x807562a30) at ntqcstring.h:61
#6  0x0000000800c0edc3 in TQThreadInstance::finish () at kernel/qthread_unix.cpp:117
#7  0x00000008040597a0 in __pthread_cleanup_pop_imp () from /lib/libthr.so.3
#8  0x0000000800c0ed53 in TQThreadInstance::start (_arg=0x80752ad88) at kernel/qthread_unix.cpp:117
#9  0x000000080404e4f5 in pthread_create () from /lib/libthr.so.3
#10 0x0000000000000000 in ?? ()
(gdb) quit
The program is running.  Exit anyway? (y or n) 



Nik


-- 
Please do not email me anything that you are not comfortable also sharing with the NSA.