1 /*
2  * Copyright (c) 2021-2023 Huawei Device Co., Ltd.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at
6  *
7  *     http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 
16 #ifndef DRM_VSYNC_WORKER_H
17 #define DRM_VSYNC_WORKER_H
18 #include <memory>
19 #include <mutex>
20 #include <thread>
21 #include <condition_variable>
22 #include "hdi_device_common.h"
23 
24 namespace OHOS {
25 namespace HDI {
26 namespace DISPLAY {
27 class DrmVsyncWorker {
28 public:
29     DrmVsyncWorker();
30     virtual ~DrmVsyncWorker();
31     int32_t Init(int fd);
32     static DrmVsyncWorker &GetInstance();
33 
34     void EnableVsync(bool enable);
35     void WorkThread();
36     uint64_t WaitNextVBlank(unsigned int &sq);
37     bool WaitSignalAndCheckRuning();
38     void ReqesterVBlankCb(std::shared_ptr<VsyncCallBack> &cb);
39 
40 private:
41     int mDrmFd = 0;
42     std::unique_ptr<std::thread> mThread;
43     bool mEnable = false;
44     std::mutex mMutex;
45     std::condition_variable mCondition;
46     std::shared_ptr<VsyncCallBack> mCallBack;
47     bool mRunning = false;
48 };
49 } // namespace OHOS
50 } // namespace HDI
51 } // namespace DISPLAY
52 
53 #endif // DRM_VSYNC_WORKER_H
54