1 /* 2 * Copyright (c) 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 OHOS_ABILITY_ABILITY_TRANSACTION_CALLBACK_INFO_H 17 #define OHOS_ABILITY_ABILITY_TRANSACTION_CALLBACK_INFO_H 18 19 #include <memory> 20 #include <stack> 21 22 namespace OHOS { 23 namespace AppExecFwk { 24 template<typename T = void> 25 class AbilityTransactionCallbackInfo { 26 public: 27 using CallbackFunc = std::function<void(T&)>; 28 Create()29 static AbilityTransactionCallbackInfo *Create() 30 { 31 return new(std::nothrow) AbilityTransactionCallbackInfo(); 32 } 33 Destroy(AbilityTransactionCallbackInfo * callbackInfo)34 static void Destroy(AbilityTransactionCallbackInfo *callbackInfo) 35 { 36 delete callbackInfo; 37 } 38 Push(const CallbackFunc & callback)39 void Push(const CallbackFunc &callback) 40 { 41 callbackStack_.push(callback); 42 } 43 Call(T & callbackResult)44 void Call(T &callbackResult) 45 { 46 while (!callbackStack_.empty()) { 47 CallbackFunc &callbackFunc = callbackStack_.top(); 48 callbackFunc(callbackResult); 49 callbackStack_.pop(); 50 } 51 } 52 53 private: 54 AbilityTransactionCallbackInfo() = default; 55 56 ~AbilityTransactionCallbackInfo() = default; 57 58 std::stack<CallbackFunc> callbackStack_ {}; 59 }; 60 61 template<> 62 class AbilityTransactionCallbackInfo<void> { 63 public: 64 using CallbackFunc = std::function<void()>; 65 Create()66 static AbilityTransactionCallbackInfo *Create() 67 { 68 return new(std::nothrow) AbilityTransactionCallbackInfo(); 69 } 70 Destroy(AbilityTransactionCallbackInfo * callbackInfo)71 static void Destroy(AbilityTransactionCallbackInfo *callbackInfo) 72 { 73 delete callbackInfo; 74 } 75 Push(const CallbackFunc & callback)76 void Push(const CallbackFunc &callback) 77 { 78 callbackStack_.push(callback); 79 } 80 Call()81 void Call() 82 { 83 while (!callbackStack_.empty()) { 84 CallbackFunc &callbackFunc = callbackStack_.top(); 85 callbackFunc(); 86 callbackStack_.pop(); 87 } 88 } 89 90 private: 91 AbilityTransactionCallbackInfo() = default; 92 93 ~AbilityTransactionCallbackInfo() = default; 94 95 std::stack<CallbackFunc> callbackStack_ {}; 96 }; 97 } // namespace AppExecFwk 98 } // namespace OHOS 99 #endif // OHOS_ABILITY_ABILITY_TRANSACTION_CALLBACK_INFO_H 100