| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| #ifndef ANDROID_HIDL_CONCURRENT_MAP_H |
| #define ANDROID_HIDL_CONCURRENT_MAP_H |
| |
| #include <mutex> |
| #include <map> |
| |
| namespace android { |
| namespace hardware { |
| |
| template<typename K, typename V> |
| class ConcurrentMap { |
| private: |
| using size_type = typename std::map<K, V>::size_type; |
| using iterator = typename std::map<K, V>::iterator; |
| using const_iterator = typename std::map<K, V>::const_iterator; |
| |
| public: |
| void set(K &&k, V &&v) { |
| std::unique_lock<std::mutex> _lock(mMutex); |
| mMap[std::forward<K>(k)] = std::forward<V>(v); |
| } |
| |
| // get with the given default value. |
| const V &get(const K &k, const V &def) const { |
| std::unique_lock<std::mutex> _lock(mMutex); |
| const_iterator iter = mMap.find(k); |
| if (iter == mMap.end()) { |
| return def; |
| } |
| return iter->second; |
| } |
| |
| size_type erase(const K &k) { |
| std::unique_lock<std::mutex> _lock(mMutex); |
| return mMap.erase(k); |
| } |
| |
| std::unique_lock<std::mutex> lock() { return std::unique_lock<std::mutex>(mMutex); } |
| |
| void setLocked(K&& k, V&& v) { mMap[std::forward<K>(k)] = std::forward<V>(v); } |
| |
| const V& getLocked(const K& k, const V& def) const { |
| const_iterator iter = mMap.find(k); |
| if (iter == mMap.end()) { |
| return def; |
| } |
| return iter->second; |
| } |
| |
| private: |
| mutable std::mutex mMutex; |
| std::map<K, V> mMap; |
| }; |
| |
| } // namespace hardware |
| } // namespace android |
| |
| |
| #endif // ANDROID_HIDL_CONCURRENT_MAP_H |