Producer seems to get stuck at program exit because it's waiting on a
keyboard/mouse thread on linux.
Let me sketch the scenario here:
Run "osgviewer --run-till-frame-number 100 cow.osg". The 100 frames
should be drawn pretty quick, but if you don't move the mouse or press a
key after starting the viewer it will not exit UNTIL you move the mouse
(or press a key). I've observed this behaviour on two different systems
(also running different window managers).
Attaching with GDB to the stalled process shows the following trace:
0xb782e707 in sched_yield () from /lib/libc.so.6
(gdb) bt
#0 0xb782e707 in sched_yield () from /lib/libc.so.6
#1 0xb78d3609 in OpenThreads::Thread::YieldCurrentThread () from
/home/melis/osg/lib/libOpenThreads.so
#2 0xb7e97e94 in Producer::KeyboardMouse::~KeyboardMouse () from
/home/melis/osg/lib/libProducer.so
#3 0xb7f06cf0 in osgProducer::Viewer::~Viewer () from
/home/melis/osg/lib/libosgProducer.so
#4 0x0804a3d0 in main ()
(gdb)
This whole thing is not such a big deal on a normal desktop system, but
our distributed application runs on multiple render nodes that don't
have a keyboard or mouse attached and our viewer on those nodes doesn't
exit when told to over the network, even though main() is clearly
finished. Attaching with gdb in this situation shows the same trace.
Any ideas on how to overcome this? I don't know enough X11 to hack
something like sending a single keypress to ourselves at exit, I'm not
sure that will even work...
Paul
--
Paul Melis
VR Specialist,
Center for High-Performance Computing & Visualization,
University of Groningen,
The Netherlands
T: +31 50 363 9298
E: [EMAIL PROTECTED]
W: http://www.rug.nl/rc/hpcv/index
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