Because callbacks are called from a looper thread, if the subscriber
unsubscribes and frees the callback, invalid memory access may occur from the
looper thread.
Address this by draining all pending callbacks at the time of listener
unregistration.
NOTE: There is rare chance that the wait on the condition times out,
still resulting in the original NPE issue. We intensionally allow that
to avoid deadlock, in case the application uses the same mutex lock for
callbacks and unregister functions.
Test: for i in {1..10}; do atest -it NativeImageReaderTest; done
Test: ACameraNdkVendorTest
Bug: 148976953
Change-Id: I92f5a02a4e3e63f2e72e8043ff4f4ac16c1eec5d
Also fixed missing implementation of Camera availability callbacks for
ExtendedAvailabilityCallback.
Test: Camera CTS, and vndk test
Bug: 148146086
Change-Id: I557d6db3900b2346b7bc7e12cd946bc4c2dc4076
In some situations, clients of the vndk might need to be able to query
tags at runtime, based on tag names. For example, when client hals are
de-coupled from the camera HAL.
Bug: 131093919
Test: AImageReaderVendorTest
Test: Modify AImageReaderVendorTest to retrieve vendor tags given their
names, using ACameraMetadata_getTagFromName
Change-Id: I1cdec5b154037185e99d29be2c6890e4fdc4a32a
Signed-off-by: Jayant Chowdhary <jchowdhary@google.com>
Shuzhen Wang
Jayant Chowdhary