1 files changed, 63 insertions, 0 deletions
diff --git a/services/surfaceflinger/Scheduler/EventControlThread.h b/services/surfaceflinger/Scheduler/EventControlThread.h
new file mode 100644
index 0000000000..cafae53400
--- /dev/null
+++ b/services/surfaceflinger/Scheduler/EventControlThread.h
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2013 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.
+ */
+
+#pragma once
+
+#include <condition_variable>
+#include <cstddef>
+#include <functional>
+#include <mutex>
+#include <thread>
+
+#include <android-base/thread_annotations.h>
+
+namespace android {
+
+class EventControlThread {
+public:
+    virtual ~EventControlThread();
+
+    virtual void setVsyncEnabled(bool enabled) = 0;
+};
+
+namespace impl {
+
+class EventControlThread final : public android::EventControlThread {
+public:
+    using SetVSyncEnabledFunction = std::function<void(bool)>;
+
+    explicit EventControlThread(SetVSyncEnabledFunction function);
+    ~EventControlThread();
+
+    // EventControlThread implementation
+    void setVsyncEnabled(bool enabled) override;
+
+private:
+    void threadMain();
+
+    std::mutex mMutex;
+    std::condition_variable mCondition;
+
+    const SetVSyncEnabledFunction mSetVSyncEnabled;
+    bool mVsyncEnabled GUARDED_BY(mMutex) = false;
+    bool mKeepRunning GUARDED_BY(mMutex) = true;
+
+    // Must be last so that everything is initialized before the thread starts.
+    std::thread mThread{&EventControlThread::threadMain, this};
+};
+
+} // namespace impl
+} // namespace android