tree 672c65a10ccee03fdd69dee43c032780ef7237e7
parent f8c7ecf6567635062ccb262b0d1e58486420aad1
author Phil Burk <philburk@google.com> 1589410517 -0700
committer Phil Burk <philburk@google.com> 1615252600 +0000

aaudio: lock transport methods

The start/pause/stop/flush/close and other binder methods
need to be thread safe. They do not need to run
in parallel. So a lock was added for each.

Where virtual methods are needed, the locked method calls
a corresponding _l submethod, eg. stop() calls stop_l().

The close logic was also simplified because the "pending"
technique is not needed now that we have the locks.
It was only needed because a close could have occured
while in the middle of another method.

Bug: 153358911
Test: adb logcat *:F
Test: in another window:  test_binder_start_storm
Test: There should be no fatal error in the logcat.
Test: atest CtsNativeMediaAAudioTestCases
Change-Id: I5920cf78af4501856756c5c2fc8e77758232508a
Merged-In: I5920cf78af4501856756c5c2fc8e77758232508a