nsresult
BluetoothService::HandleShutdown()
{
MOZ_ASSERT(NS_IsMainThread());
// This is a two phase shutdown. First we notify all child processes that
// bluetooth is going away, and then we wait for them to acknowledge. Then we
// close down all the bluetooth machinery.
gInShutdown = true;
Cleanup();
AutoInfallibleTArray<BluetoothParent*, 10> childActors;
GetAllBluetoothActors(childActors);
if (!childActors.IsEmpty()) {
// Notify child processes that they should stop using bluetooth now.
for (uint32_t index = 0; index < childActors.Length(); index++) {
childActors[index]->BeginShutdown();
}
// Create a timer to ensure that we don't wait forever for a child process
// or the bluetooth threads to finish. If we don't get a timer or can't use
// it for some reason then we skip all the waiting entirely since we really
// can't afford to hang on shutdown.
nsCOMPtr<nsITimer> timer = do_CreateInstance(NS_TIMER_CONTRACTID);
MOZ_ASSERT(timer);
if (timer) {
bool timeExceeded = false;
if (NS_SUCCEEDED(timer->InitWithFuncCallback(ShutdownTimeExceeded,
&timeExceeded,
DEFAULT_SHUTDOWN_TIMER_MS,
nsITimer::TYPE_ONE_SHOT))) {
nsIThread* currentThread = NS_GetCurrentThread();
MOZ_ASSERT(currentThread);
// Wait for those child processes to acknowledge.
while (!timeExceeded && !childActors.IsEmpty()) {
if (!NS_ProcessNextEvent(currentThread)) {
MOZ_ASSERT(false, "Something horribly wrong here!");
break;
}
GetAllBluetoothActors(childActors);
}
if (NS_FAILED(timer->Cancel())) {
MOZ_NOT_REACHED("Failed to cancel shutdown timer, this will crash!");
}
}
else {
MOZ_ASSERT(false, "Failed to initialize shutdown timer!");
}
}
}
if (IsEnabled() && NS_FAILED(StartStopBluetooth(false))) {
MOZ_ASSERT(false, "Failed to deliver stop message!");
}
return NS_OK;
}
