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 OHOS_WM_SINGLE_INSTANCE_H 17 #define OHOS_WM_SINGLE_INSTANCE_H 18 namespace OHOS { 19 namespace Rosen { 20 #define WM_DECLARE_SINGLE_INSTANCE_BASE(className) \ 21 public: \ 22 static className& GetInstance(); \ 23 className(const className&) = delete; \ 24 className& operator= (const className&) = delete; \ 25 className(className&&) = delete; \ 26 className& operator= (className&&) = delete; \ 27 28 #define WM_DECLARE_SINGLE_INSTANCE(className) \ 29 WM_DECLARE_SINGLE_INSTANCE_BASE(className) \ 30 protected: \ 31 className() = default; \ 32 virtual ~className() = default; \ 33 34 #define WM_IMPLEMENT_SINGLE_INSTANCE(className) \ 35 className& className::GetInstance() \ 36 { \ 37 static className instance; \ 38 return instance; \ 39 } \ 40 41 } // namespace OHOS 42 } 43 #endif // OHOS_SINGLE_INSTANCE_H 44