Merge "Make count for numSyncsInProgress static"

core/java/android/view/ViewRootImpl.java

@@ -853,7 +853,12 @@ public final class ViewRootImpl implements ViewParent,
 
     private SurfaceSyncGroup mSyncGroup;
     private SurfaceSyncGroup.TransactionReadyCallback mTransactionReadyCallback;
-    private int mNumSyncsInProgress = 0;
+
+    private static final Object sSyncProgressLock = new Object();
+    // The count needs to be static since it's used to enable or disable RT animations which is
+    // done at a global level per process. If any VRI syncs are in progress, we can't enable RT
+    // animations until all are done.
+    private static int sNumSyncsInProgress = 0;
 
     private HashSet<ScrollCaptureCallback> mRootScrollCaptureCallbacks;
 
@@ -11229,13 +11234,6 @@ public final class ViewRootImpl implements ViewParent,
         });
     }
 
-    private final Executor mPostAtFrontExecutor = new Executor() {
-        @Override
-        public void execute(Runnable command) {
-            mHandler.postAtFrontOfQueue(command);
-        }
-    };
-
     public final SurfaceSyncGroup.SyncTarget mSyncTarget = new SurfaceSyncGroup.SyncTarget() {
         @Override
         public void onAddedToSyncGroup(SurfaceSyncGroup parentSyncGroup,
@@ -11245,9 +11243,6 @@ public final class ViewRootImpl implements ViewParent,
                 // Always sync the buffer if the sync request did not come from VRI.
                 mSyncBuffer = true;
             }
-            if (mAttachInfo.mThreadedRenderer != null) {
-                HardwareRenderer.setRtAnimationsEnabled(false);
-            }
 
             if (mTransactionReadyCallback != null) {
                 Log.d(mTag, "Already set sync for the next draw.");
@@ -11261,16 +11256,29 @@ public final class ViewRootImpl implements ViewParent,
                 scheduleTraversals();
             }
         }
+    };
 
-        private void updateSyncInProgressCount(SurfaceSyncGroup parentSyncGroup) {
-            mNumSyncsInProgress++;
-            parentSyncGroup.addSyncCompleteCallback(mPostAtFrontExecutor, () -> {
-                if (--mNumSyncsInProgress == 0 && mAttachInfo.mThreadedRenderer != null) {
+    private final Executor mSimpleExecutor = Runnable::run;
+
+    private void updateSyncInProgressCount(SurfaceSyncGroup syncGroup) {
+        if (mAttachInfo.mThreadedRenderer == null) {
+            return;
+        }
+
+        synchronized (sSyncProgressLock) {
+            if (sNumSyncsInProgress++ == 0) {
+                HardwareRenderer.setRtAnimationsEnabled(false);
+            }
+        }
+
+        syncGroup.addSyncCompleteCallback(mSimpleExecutor, () -> {
+            synchronized (sSyncProgressLock) {
+                if (--sNumSyncsInProgress == 0) {
                     HardwareRenderer.setRtAnimationsEnabled(true);
                 }
-            });
-        }
-    };
+            }
+        });
+    }
 
     @Override
     public SurfaceSyncGroup.SyncTarget getSyncTarget() {