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/DisplayHardware/VSyncBarrier.h b/services/surfaceflinger/DisplayHardware/VSyncBarrier.h
new file mode 100644
index 0000000..3c32950
--- /dev/null
+++ b/services/surfaceflinger/DisplayHardware/VSyncBarrier.h
@@ -0,0 +1,41 @@
+/*
+ * 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_VSYNCBARRIER_H_
+#define ANDROID_SURFACE_FLINGER_VSYNCBARRIER_H_
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <utils/Errors.h>
+#include <utils/Timers.h>
+
+namespace android {
+// ---------------------------------------------------------------------------
+
+class VSyncBarrier {
+ int mFd;
+public:
+ VSyncBarrier();
+ ~VSyncBarrier();
+ status_t initCheck() const;
+ status_t wait(nsecs_t* timestamp) const;
+};
+
+// ---------------------------------------------------------------------------
+}; // namespace android
+
+#endif /* ANDROID_SURFACE_FLINGER_VSYNCBARRIER_H_ */