Add support for sending VSYNC events to the framework
use gui/DisplayEvent to receive the events. Events are
dispatched through a unix pipe, so the API is compatible
with utils/Looper. see gui/DisplayEvent.h for more info.
Bug: 1475048
Change-Id: Ia720f64d1b950328b47b22c6a86042e481d35f09
diff --git a/services/surfaceflinger/EventThread.h b/services/surfaceflinger/EventThread.h
new file mode 100644
index 0000000..0482ab7
--- /dev/null
+++ b/services/surfaceflinger/EventThread.h
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_SURFACE_FLINGER_EVENT_THREAD_H
+#define ANDROID_SURFACE_FLINGER_EVENT_THREAD_H
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <gui/IDisplayEventConnection.h>
+
+#include <utils/Errors.h>
+#include <utils/threads.h>
+#include <utils/SortedVector.h>
+
+#include "DisplayEventConnection.h"
+
+// ---------------------------------------------------------------------------
+
+namespace android {
+
+// ---------------------------------------------------------------------------
+
+class SurfaceFlinger;
+class DisplayHardware;
+
+// ---------------------------------------------------------------------------
+
+class EventThread : public Thread {
+ friend class DisplayEventConnection;
+
+public:
+ EventThread(const sp<SurfaceFlinger>& flinger);
+
+ status_t registerDisplayEventConnection(
+ const sp<DisplayEventConnection>& connection);
+
+ status_t unregisterDisplayEventConnection(
+ const wp<DisplayEventConnection>& connection);
+
+ void dump(String8& result, char* buffer, size_t SIZE) const;
+
+private:
+ virtual bool threadLoop();
+ virtual status_t readyToRun();
+ virtual void onFirstRef();
+
+ // constants
+ sp<SurfaceFlinger> mFlinger;
+ const DisplayHardware& mHw;
+
+ mutable Mutex mLock;
+ mutable Condition mCondition;
+
+ // protected by mLock
+ SortedVector<wp<DisplayEventConnection> > mDisplayEventConnections;
+ size_t mDeliveredEvents;
+};
+
+// ---------------------------------------------------------------------------
+
+}; // namespace android
+
+// ---------------------------------------------------------------------------
+
+#endif /* ANDROID_SURFACE_FLINGER_EVENT_THREAD_H */