1 /* 2 * Copyright (c) 2023 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 #include "adapter/preview/entrance/ace_preview_helper.h" 17 18 #include <memory> 19 #include <mutex> 20 21 namespace OHOS::Ace::Platform { 22 namespace { 23 std::unique_ptr<AcePreviewHelper> instance_ = nullptr; 24 std::mutex mutex_; 25 } // namespace GetInstance()26AcePreviewHelper* AcePreviewHelper::GetInstance() 27 { 28 if (!instance_) { 29 std::lock_guard<std::mutex> lock(mutex_); 30 if (!instance_) { 31 instance_.reset(new AcePreviewHelper()); 32 } 33 } 34 return instance_.get(); 35 } 36 } // namespace OHOS::Ace::Platform 37