Does Android 13 remove mEventQueue in SurfaceFlinger.cpp?

Question

how does surfaceflinger in Android 13 handle Refresh and Invalidate events without the mEventQueue

Answer 1

I just met the same question, so I checked the code. I found the mEventQueue is replaced by the mScheduler.

As you can see, the Scheduler now extends from MessageQueue:

Scheduler::Scheduler(ICompositor& compositor, ISchedulerCallback& callback, FeatureFlags features)
  : impl::MessageQueue(compositor), mFeatures(features), mSchedulerCallback(callback) {}

Therefore, the Scheduler can do the same thing. For example, The function SurfaceFlinger::run() which will be executed when SurfaceFlinger create has changed to be:

    // AOSP 13
    void SurfaceFlinger::run() {
        mScheduler->run();
    }

    void Scheduler::run() {
        while (true) {
            waitMessage();
        }
    }

    // before
    void SurfaceFlinger::run() {
         while (true) {
             mEventQueue->waitMessage();
         }
     }