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 #ifndef PREFERENCES_FILE_LOCK_H 17 #define PREFERENCES_FILE_LOCK_H 18 19 #include <chrono> 20 #include <map> 21 #include <memory> 22 #include <mutex> 23 #include <string> 24 25 #include "preferences_errno.h" 26 namespace OHOS { 27 namespace NativePreferences { 28 29 class PreferencesLockManager { 30 public: 31 static std::shared_ptr<std::mutex> Get(const std::string fileName); 32 private: 33 static std::map<std::string, std::shared_ptr<std::mutex>> inProcessMutexs_; 34 static std::mutex mapMutex_; 35 }; 36 class PreferencesFileLock final { 37 public: 38 PreferencesFileLock(const std::string &path); 39 ~PreferencesFileLock(); 40 void ReadLock(bool &isMultiProcessing); 41 void WriteLock(bool &isMultiProcessing); 42 43 private: 44 void Lock(short lockType, bool &isMultiProcessing); 45 46 int fd_{ -1 }; 47 std::shared_ptr<std::mutex> inProcessMutex_; 48 std::string filePath_; 49 }; 50 } // namespace NativePreferences 51 } // namespace OHOS 52 #endif