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 16 #ifndef FOUNDATION_APPEXECFWK_SERVICES_APPMGR_INCLUDE_PROCESS_OPTIMIZER_H 17 #define FOUNDATION_APPEXECFWK_SERVICES_APPMGR_INCLUDE_PROCESS_OPTIMIZER_H 18 19 #include <functional> 20 #include <list> 21 #include <memory> 22 #include <set> 23 #include <string> 24 25 #include "ability_running_record.h" 26 #include "app_running_record.h" 27 #include "cgroup_manager.h" 28 #include "lmks_client.h" 29 #include "event_handler.h" 30 #include "nocopyable.h" 31 32 namespace OHOS { 33 namespace AppExecFwk { 34 class ProcessOptimizer : public NoCopyable { 35 public: 36 using EventHandlerPtr = std::shared_ptr<EventHandler>; 37 using AppPtr = std::shared_ptr<AppRunningRecord>; 38 using AbilityPtr = std::shared_ptr<AbilityRunningRecord>; 39 using CgroupManagerPtr = std::shared_ptr<CgroupManager>; 40 using LmksClientPtr = std::shared_ptr<LmksClient>; 41 42 static constexpr int APP_SUSPEND_TIMEOUT_DEFAULT = 5000; // in milliseconds 43 static constexpr int APP_SUSPEND_TIMEOUT_MAX = 30 * 1000; // in milliseconds 44 45 public: 46 ProcessOptimizer(const LmksClientPtr &lmksClient = nullptr, int suspendTimeout = APP_SUSPEND_TIMEOUT_DEFAULT); 47 48 virtual ~ProcessOptimizer(); 49 50 public: 51 // callbacks 52 std::function<void(AppPtr)> AppSuspended; 53 std::function<void(AppPtr)> AppResumed; 54 std::function<void(AppPtr, CgroupManager::LowMemoryLevel)> AppLowMemoryAlert; 55 std::function<AppPtr(AbilityPtr)> GetAbilityOwnerApp; 56 57 public: 58 virtual bool Init(); 59 virtual void OnAppAdded(const AppPtr &app); 60 virtual void OnAppRemoved(const AppPtr &app); 61 virtual void OnAppStateChanged(const AppPtr &app, const ApplicationState oldState); 62 virtual void OnAbilityStarted(const AbilityPtr &ability); 63 virtual void OnAbilityConnected(const AbilityPtr &ability, const AbilityPtr &targetAbility); 64 virtual void OnAbilityDisconnected(const AbilityPtr &ability, const AbilityPtr &targetAbility); 65 virtual void OnAbilityStateChanged(const AbilityPtr &ability, const AbilityState oldState); 66 virtual void OnAbilityVisibleChanged(const AbilityPtr &ability); 67 virtual void OnAbilityPerceptibleChanged(const AbilityPtr &ability); 68 virtual void OnAbilityRemoved(const AbilityPtr &ability); 69 virtual void SetAppFreezingTime(int time); 70 virtual void GetAppFreezingTime(int &time); 71 72 protected: 73 bool SetAppOomAdj(const AppPtr &app, int oomAdj); 74 bool SetAppSchedPolicy(const AppPtr &app, const CgroupManager::SchedPolicy schedPolicy); 75 virtual void OnLowMemoryAlert(const CgroupManager::LowMemoryLevel level); 76 77 private: 78 bool UpdateAppOomAdj(const AppPtr &app); 79 bool GetAppOomAdj(const AppPtr &app,ApplicationState state,int &oomAdj,int &oomAdjMax); 80 bool UpdateAppSchedPolicy(const AppPtr &app); 81 void StartAppSuspendTimer(const AppPtr &app); 82 void StopAppSuspendTimer(const AppPtr &app); 83 void SuspendApp(const AppPtr &app); 84 std::string GetAppSuspendTimerName(const AppPtr &app); 85 86 private: 87 using AppLru = std::list<AppPtr>; 88 using SuspendTimers = std::set<std::string>; 89 90 LmksClientPtr lmksClient_; 91 AppLru appLru_; 92 EventHandlerPtr eventHandler_; 93 SuspendTimers suspendTimers_; 94 int suspendTimeout_; 95 }; 96 } // namespace AppExecFwk 97 } // namespace OHOS 98 99 #endif // FOUNDATION_APPEXECFWK_SERVICES_APPMGR_INCLUDE_PROCESS_OPTIMIZER_H 100