Hi Robert, I saw that you put the new thread code on svn. I have experimented a little with it and it seems to produce deadlocks on application shutdown for us. In OperationThread::cancel you have replaced a while loop with a join. The problem is that the previous code was periodically calling _currentOperation->release() which the new code does not do. I think I have narrowed the problem down, there are two scenarios that can produce deadlocks:
1) OperationThread::cancel can call _currentOperation->release() when the operation thread is at line 396 to 399 (so it didn't set _currentOperation yet). This way the operation thread will be blocking on the operation it just got from the queue, which is not the operation that got it's release method called by OperationThread::cancel. 2) If the current operation is a barrier then the release method only releases threads that are waiting, it does not invalidate the barrier. So if the operation thread is not yet in the barrier and you call release it will still block when it arrives at the barrier. Cheers, Pjotr ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=61519#61519 _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
