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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2024-01-19 17:29:58 +0200
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2024-01-25 02:39:05 +0200
commitf422624d9c47b6f81c00d4b9fe2719b545b1392a (patch)
tree594e9841b5e70bfd2259769afffc10652f4a5284 /test/event-thread.cpp
parentd47fa37c2e22c0ef13be69c00950fe39f257e2bb (diff)
libcamera: thread: Ensure deferred deletion of all objects before stopping
Objects can be scheduled for deletion with Object::deleteLater(), which queues a deferred deletion to the thread's event loop. As the deleteLater() function is meant to be called from a different thread, this may race with thread termination, and deferred deletions queued just before calling Thread::exit() may not be processed by the event loop. Make sure they get processed when finishing the thread, before stopping. This eliminates the race condition that occurs when calling Object::deleteLater() followed by Thread::exit() from the same thread. Calling deleteLater() from neither the thread the object is bound to or the thread calling Thread::exit() is still inherently racy. The change fixes a failure in the object-delete unit test. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Milan Zamazal <mzamazal@redhat.com>
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