1 /* 2 * Copyright (C) 2021 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 POINTER_KEY_MAP_H 17 #define POINTER_KEY_MAP_H 18 19 #include <map> 20 21 namespace OHOS { 22 namespace MultimediaPlugin { 23 template<class K> 24 struct PointerComparator { operatorPointerComparator25 bool operator()(K *lhs, K *rhs) const 26 { 27 if (lhs == nullptr || rhs == nullptr) { 28 return false; 29 } 30 31 return *lhs < *rhs; 32 } 33 }; 34 35 template<class K, class T> using PointerKeyMap = std::map<K *, T, PointerComparator<K>>; 36 37 template<class K, class T> using PointerKeyMultimap = std::multimap<K *, T, PointerComparator<K>>; 38 } // namespace MultimediaPlugin 39 } // namespace OHOS 40 41 #endif // POINTER_KEY_MAP_H 42