1 /*
2  * Copyright (C) 2020 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #pragma once
18 
19 #include <atomic>
20 #include <string>
21 
22 namespace android::hardware::automotive::vehicle::V2_0::impl {
23 
24 /**
25  *  Listen on a Unix socket for power state updates, and change the power
26  *  state marker file accordingly.
27  */
28 class PowerStateListener {
29   public:
30     // TODO(chenhaosjtuacm): use std::filesystem::path when available
31     PowerStateListener(const std::string& socketPath, const std::string& powerStateMarkerFilePath);
32 
33     void Listen();
34 
35     void Stop();
36 
37   private:
38     std::atomic<bool> mShuttingDownFlag{false};
39     const std::string mSocketPath;
40     const std::string mPowerStateMarkerFilePath;
41 };
42 
43 }  // namespace android::hardware::automotive::vehicle::V2_0::impl
44