1 /* 2 * Copyright (c) 2025-2025 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 OHOS_CAMERA_NDK_CALLBACK_MAP_H 17 #define OHOS_CAMERA_NDK_CALLBACK_MAP_H 18 19 #include <cstdint> 20 #include <mutex> 21 #include <unordered_map> 22 23 template<typename K, typename V> 24 class NDKCallbackMap { 25 public: SetMapValue(K key,std::shared_ptr<V> value)26 bool SetMapValue(K key, std::shared_ptr<V> value) 27 { 28 if (key == nullptr) { 29 return false; 30 } 31 std::lock_guard<std::mutex> lock(mapMutex_); 32 auto it = callbackMap_.find(key); 33 if (it != callbackMap_.end()) { 34 return false; 35 } 36 callbackMap_[key] = value; 37 return true; 38 } 39 RemoveValue(K key)40 std::shared_ptr<V> RemoveValue(K key) 41 { 42 std::shared_ptr<V> callback = nullptr; 43 std::lock_guard<std::mutex> lock(mapMutex_); 44 auto it = callbackMap_.find(key); 45 if (it != callbackMap_.end()) { 46 callback = it->second; 47 callbackMap_.erase(it); 48 } 49 return callback; 50 } 51 52 private: 53 std::mutex mapMutex_; 54 std::unordered_map<K, std::shared_ptr<V>> callbackMap_; 55 }; 56 57 #endif