1 /* 2 * Copyright (c) 2025 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 CLOUD_DISK_SINGLETON_MOCK_TEST_H 17 #define CLOUD_DISK_SINGLETON_MOCK_TEST_H 18 19 #include <memory> 20 21 namespace OHOS { 22 template <typename T> 23 class DelayedSingleton { 24 public: GetInstance()25 static std::shared_ptr<T> GetInstance() 26 { 27 if (instance_ == nullptr) { 28 return nullptr; 29 } 30 return instance_; 31 } 32 static inline std::shared_ptr<T> instance_{nullptr}; 33 }; 34 } // namespace OHOS 35 36 #endif // CLOUD_DISK_SINGLETON_MOCK_TEST_H