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 16 #ifndef RELIABILITY_WATCHDOG_INNER_H 17 #define RELIABILITY_WATCHDOG_INNER_H 18 19 #include <atomic> 20 #include <condition_variable> 21 #include <memory> 22 #include <mutex> 23 #include <queue> 24 #include <set> 25 #include <string> 26 #include <thread> 27 28 #include "watchdog_task.h" 29 #include "singleton.h" 30 31 namespace OHOS { 32 namespace HiviewDFX { 33 class WatchdogInner : public Singleton<WatchdogInner> { 34 DECLARE_SINGLETON(WatchdogInner); 35 public: 36 int AddThread(const std::string &name, std::shared_ptr<AppExecFwk::EventHandler> handler, uint64_t interval); 37 int AddThread(const std::string &name, std::shared_ptr<AppExecFwk::EventHandler> handler, 38 TimeOutCallback timeOutCallback, uint64_t interval); 39 void RunOneShotTask(const std::string& name, Task&& task, uint64_t delay); 40 void RunPeriodicalTask(const std::string& name, Task&& task, uint64_t interval, uint64_t delay); 41 void StopWatchdog(); 42 43 private: 44 bool Start(); 45 bool Stop(); 46 bool IsTaskExistLocked(const std::string& name); 47 bool IsExceedMaxTaskLocked(); 48 bool InsertWatchdogTaskLocked(const std::string& name, WatchdogTask&& task); 49 uint64_t FetchNextTask(uint64_t now, WatchdogTask& task); 50 void ReInsertTaskIfNeed(WatchdogTask& task); 51 void CreateWatchdogThreadIfNeed(); 52 53 static const unsigned int MAX_WATCH_NUM = 128; // 128: max handler thread 54 std::priority_queue<WatchdogTask> checkerQueue_; // protected by lock_ 55 std::unique_ptr<std::thread> threadLoop_; 56 std::mutex lock_; 57 std::condition_variable condition_; 58 std::atomic_bool isNeedStop_ = false; 59 std::once_flag flag_; 60 std::set<std::string> taskNameSet_; 61 }; 62 } // end of namespace HiviewDFX 63 } // end of namespace OHOS 64 #endif 65