NS_IMETHODIMP
FileSystemTaskParentBase::Run()
{
// This method can run in 2 different threads. Here why:
// 1. We are are on the I/O thread and we call IOWork().
// 2. After step 1, it returns back to the PBackground thread.
// Run I/O thread tasks
if (!IsOnBackgroundThread()) {
nsresult rv = IOWork();
if (NS_WARN_IF(NS_FAILED(rv))) {
SetError(rv);
}
// Let's go back to PBackground thread to finish the work.
rv = mBackgroundEventTarget->Dispatch(this, NS_DISPATCH_NORMAL);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
// If we are here, it's because the I/O work has been done and we have to
// handle the result back via IPC.
AssertIsOnBackgroundThread();
HandleResult();
return NS_OK;
}
NS_IMETHODIMP
FileSystemTaskParentBase::Run()
{
// This method can run in 3 different threads. Here why:
// 1. if we are on the main-thread it's because the task must do something
// here. If no errors are returned we go the step 2.
// 2. We can be here directly if the task doesn't have nothing to do on the
// main-thread. We are are on the I/O thread and we call IOWork().
// 3. Both step 1 (in case of error) and step 2 end up here where return the
// value back to the PBackground thread.
if (NS_IsMainThread()) {
MOZ_ASSERT(NeedToGoToMainThread());
nsresult rv = MainThreadWork();
if (NS_WARN_IF(NS_FAILED(rv))) {
SetError(rv);
// Something when wrong. Let's go to the Background thread directly
// skipping the I/O thread step.
rv = mBackgroundEventTarget->Dispatch(this, NS_DISPATCH_NORMAL);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
// Next step must happen on the I/O thread.
rv = DispatchToIOThread(this);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
// Run I/O thread tasks
if (!IsOnBackgroundThread()) {
nsresult rv = IOWork();
if (NS_WARN_IF(NS_FAILED(rv))) {
SetError(rv);
}
// Let's go back to PBackground thread to finish the work.
rv = mBackgroundEventTarget->Dispatch(this, NS_DISPATCH_NORMAL);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
// If we are here, it's because the I/O work has been done and we have to
// handle the result back via IPC.
AssertIsOnBackgroundThread();
HandleResult();
return NS_OK;
}
bool
VsyncParent::NotifyVsync(TimeStamp aTimeStamp)
{
// Called on hardware vsync thread. We should post to current ipc thread.
MOZ_ASSERT(!IsOnBackgroundThread());
nsCOMPtr<nsIRunnable> vsyncEvent =
NewRunnableMethod<TimeStamp>(this,
&VsyncParent::DispatchVsyncEvent,
aTimeStamp);
MOZ_ALWAYS_SUCCEEDS(mBackgroundThread->Dispatch(vsyncEvent, NS_DISPATCH_NORMAL));
return true;
}
// static
already_AddRefed<GamepadPlatformService>
GamepadPlatformService::GetParentService()
{
//GamepadPlatformService can only be accessed in parent process
MOZ_ASSERT(XRE_IsParentProcess());
if (!gGamepadPlatformServiceSingleton) {
// Only Background Thread can create new GamepadPlatformService instance.
if (IsOnBackgroundThread()) {
gGamepadPlatformServiceSingleton = new GamepadPlatformService();
} else {
return nullptr;
}
}
RefPtr<GamepadPlatformService> service(gGamepadPlatformServiceSingleton);
return service.forget();
}
