1 /* 2 * Copyright (c) 2021 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 UTILS_TIMER_EVENT_HANDLER_H 16 #define UTILS_TIMER_EVENT_HANDLER_H 17 18 #include <functional> 19 #include <memory> 20 #include <cstdint> 21 22 namespace OHOS { 23 namespace Utils { 24 constexpr int INVALID_TIMER_FD = -1; 25 26 class EventHandler; 27 class EventReactor; 28 29 class TimerEventHandler { 30 using TimerCallback = std::function<void(int timerFd)>; 31 public: 32 TimerEventHandler(EventReactor* p, uint32_t timeout, bool once); 33 ~TimerEventHandler(); 34 35 TimerEventHandler(const TimerEventHandler&) = delete; 36 TimerEventHandler& operator=(const TimerEventHandler&) = delete; 37 TimerEventHandler(const TimerEventHandler&&) = delete; 38 TimerEventHandler& operator=(const TimerEventHandler&&) = delete; 39 40 uint32_t Initialize(); 41 void Uninitialize(); 42 SetTimerCallback(const TimerCallback & callback)43 void SetTimerCallback(const TimerCallback& callback) { callback_ = callback; } 44 GetInterval()45 uint32_t GetInterval() const { return interval_; } GetTimerFd()46 int GetTimerFd() const { return timerFd_; } 47 48 private: 49 void TimeOut(); 50 51 private: 52 bool once_; 53 int timerFd_; 54 uint32_t interval_; 55 EventReactor* reactor_; 56 57 std::unique_ptr<EventHandler> handler_; 58 TimerCallback callback_; 59 }; 60 61 } // namespace Utils 62 } // namespace OHOS 63 #endif 64