pipe_condvar_init() was made unnecessary with fd33a6bcd7.
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
If i-th thread could not be created it means we have i threads,
not i+1, because we start from 0.
Fixes: 404d0d5 "gallium/u_queue: add an option to have multiple worker threads"
Signed-off-by: Grazvydas Ignotas <notasas@gmail.com>
Signed-off-by: Marek Olšák <marek.olsak@amd.com>
Commit 4aea8fe ("gallium/u_queue: fix random crashes when the app calls
exit()") added a atexit handler which calls
util_queue_killall_and_wait() for each queue to stop the threads.
However the app is also free to use atexit handlers to clean up things,
leading to util_queue_destroy() call which will also call
util_queue_killall_and_wait() for the same queue again, causing threads
being joined twice, and that is undefined. This happens with libglut,
for example. A simple fix is to just set num_threads to 0 as there are
no more valid threads after util_queue_killall_and_wait() returns.
Fixes: 4aea8fe "gallium/u_queue: fix random crashes when the app calls exit()"
Signed-off-by: Grazvydas Ignotas <notasas@gmail.com>
Signed-off-by: Marek Olšák <marek.olsak@amd.com>
This fixes:
vdpauinfo: ../lib/CodeGen/TargetPassConfig.cpp:579: virtual void
llvm::TargetPassConfig::addMachinePasses(): Assertion `TPI && IPI &&
"Pass ID not registered!"' failed.
v2: use list_head, switch the call order in destroy
Cc: 13.0 17.0 <mesa-stable@lists.freedesktop.org>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Adds a second optional cleanup callback, called after the fence is
signaled. This is needed if, for example, the queue has the last
reference to the object that embeds the util_queue_fence. In this
case we cannot drop the ref in the main callback, since that would
result in the fence being destroyed before it is signaled.
Signed-off-by: Rob Clark <robdclark@gmail.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
I have seen a hang during application shutdown that could be explained by the
following race condition which this patch fixes:
1. Worker thread enters util_queue_fence_signal, sets fence->signalled = true.
2. Main thread calls util_queue_job_wait, which returns immediately.
3. Main thread deletes the job and fence structures, leaving garbage behind.
4. Worker thread calls pipe_condvar_broadcast, which gets stuck forever because
it is accessing garbage.
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Edward O'Callaghan <funfunctor@folklore1984.net>
Checking "signalled" is first done without a mutex, then with a mutex.
Also, checking without waiting doesn't lock the mutex. This is racy, but
should be safe.
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
