1 /*
2  * Copyright (c) 2024 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 DISTRIBUTEDDATAMGR_FRAMEWORK_SCREEN_LOCK_H
16 #define DISTRIBUTEDDATAMGR_FRAMEWORK_SCREEN_LOCK_H
17 
18 #include <memory>
19 #include <mutex>
20 #include "visibility.h"
21 
22 namespace OHOS {
23 namespace DistributedData {
24 class ScreenManager {
25 public:
26     API_EXPORT static std::shared_ptr<ScreenManager> GetInstance();
27     API_EXPORT static bool RegisterInstance(std::shared_ptr<ScreenManager> instance);
28     ScreenManager() = default;
29     virtual ~ScreenManager() = default;
30     virtual bool IsLocked();
31 
32 private:
33     static std::mutex mutex_;
34     static std::shared_ptr<ScreenManager> instance_;
35 };
36 } // namespace DistributedData
37 } // namespace OHOS
38 #endif //DISTRIBUTEDDATAMGR_FRAMEWORK_SCREEN_LOCK_H
39