1 /* 2 * Copyright (C) 2019 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 <memory> 20 #include <optional> 21 #include <string> 22 23 namespace android { 24 namespace wakelock { 25 26 // RAII-style wake lock implementation 27 class WakeLock { 28 private: 29 class WakeLockImpl; 30 std::unique_ptr<WakeLockImpl> mImpl; 31 32 public: 33 static std::optional<WakeLock> tryGet(const std::string& name); 34 // Constructor is only made public for use with std::optional. 35 // It is not intended to be and cannot be invoked from public context, 36 // since private WakeLockImpl prevents calling the constructor directly. 37 WakeLock(std::unique_ptr<WakeLockImpl> wlImpl); 38 ~WakeLock(); 39 }; 40 41 } // namespace wakelock 42 } // namespace android 43