void
RegisterSwitchObserver(hal::SwitchDevice aDevice, hal::SwitchObserver *aObserver)
{
AssertMainThread();
SwitchObserverList& observer = GetSwitchObserverList(aDevice);
observer.AddObserver(aObserver);
if (observer.Length() == 1) {
EnableSwitchNotifications(aDevice);
}
}
void
NotifySwitchChange(const hal::SwitchEvent& aEvent)
{
// When callback this notification, main thread may call unregister function
// first. We should check if this pointer is valid.
if (!sSwitchObserverLists)
return;
SwitchObserverList& observer = GetSwitchObserverList(aEvent.device());
observer.Broadcast(aEvent);
}
void
UnregisterSwitchObserver(hal::SwitchDevice aDevice, hal::SwitchObserver *aObserver)
{
AssertMainThread();
SwitchObserverList& observer = GetSwitchObserverList(aDevice);
observer.RemoveObserver(aObserver);
if (observer.Length() == 0) {
DisableSwitchNotifications(aDevice);
ReleaseObserversIfNeeded();
}
}
void
UnregisterSwitchObserver(SwitchDevice aDevice, SwitchObserver *aObserver)
{
AssertMainThread();
if (!sSwitchObserverLists) {
return;
}
SwitchObserverList& observer = GetSwitchObserverList(aDevice);
if (!observer.RemoveObserver(aObserver) || observer.Length() > 0) {
return;
}
DisableSwitchNotifications(aDevice);
ReleaseObserversIfNeeded();
}
