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 #ifndef _ID_GENERATOR_H_ 16 #define _ID_GENERATOR_H_ 17 #include <string> 18 #include <unordered_set> 19 #include <climits> 20 namespace OHOS { 21 namespace HDI { 22 namespace DISPLAY { 23 class IdGenerator { 24 public: 25 IdGenerator(std::string name); 26 bool GetNext(uint32_t &id); 27 void Release(uint32_t id); 28 private: 29 std::unordered_set<uint32_t> usedIds_; 30 std::string name_; 31 uint32_t nextId_ = 0; 32 }; 33 } // OHOS 34 } // HDI 35 } // DISPLAY 36 37 #endif // _ID_GENERATOR_H_