1 /*
2  * Copyright (c) 2021-2022 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 #ifndef CAMERA_TIMER_H
16 #define CAMERA_TIMER_H
17 
18 #include <memory>
19 #include <atomic>
20 #include <commonlibrary/c_utils/base/include/timer.h>
21 
22 namespace OHOS {
23 namespace CameraStandard {
24 using TimerCallback = std::function<void()>;
25 
26 class CameraTimer {
27 public:
28     CameraTimer();
29     ~CameraTimer();
30 
31     static CameraTimer *GetInstance();
32     void IncreaseUserCount();
33     void DecreaseUserCount();
34     uint32_t Register(const TimerCallback& callback, uint32_t interval, bool once);
35     void Unregister(uint32_t timerId);
36 
37 private:
38     std::atomic<int32_t> userCount_;
39     std::unique_ptr<OHOS::Utils::Timer> timer_;
40 };
41 } // namespace CameraStandard
42 } // namespace OHOS
43 #endif // CAMERA_TIMER_H