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Fix threading problem that resulted in the wakelock being held too long.

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In some circumstances we were calling wait after we had been signalled, causing
us to wait until we are signalled again (while holding a wakelock).
Now we only want to wait in the deferred action thread if no events are pending
and only hold the wakelock while not waiting.

BUG: 3127617

Change-Id: I4c6886b2bbdcbcb2c0cf348d89bc5408f0d875b9
Signed-off-by: Mike Lockwood <lockwood@google.com>
This commit is contained in:
Mike Lockwood 2010-10-27 14:53:57 -04:00
parent 0b602e40b8
commit a162c43519
1 changed files with 10 additions and 4 deletions
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10
loc_api/libloc_api/loc_eng.cpp
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@ -1449,11 +1449,17 @@ static void loc_eng_process_deferred_action (void* arg)
// Wait until we are signalled to do a deferred action, or exit
pthread_mutex_lock(&loc_eng_data.deferred_action_mutex);
if (loc_eng_data.deferred_action_flags == 0)
// If we have an event we should process it immediately,
// otherwise wait until we are signalled
if (loc_eng_data.deferred_action_flags == 0) {
// do not hold a wake lock while waiting for an event...
loc_eng_data.release_wakelock_cb();
pthread_cond_wait(&loc_eng_data.deferred_action_cond,
&loc_eng_data.deferred_action_mutex);
// but after we are signalled reacquire the wake lock
// until we are done processing the event.
loc_eng_data.acquire_wakelock_cb();
}
if (loc_eng_data.deferred_action_flags & DEFERRED_ACTION_QUIT)
{