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 OHOS_FILEMGMT_DENTRY_FILE_UTILS_H 17 #define OHOS_FILEMGMT_DENTRY_FILE_UTILS_H 18 19 #include <string> 20 #include <sys/stat.h> 21 22 namespace OHOS { 23 namespace FileManagement { 24 class FileUtils { 25 public: 26 FileUtils() = delete; 27 ~FileUtils() = delete; 28 29 static int64_t ReadFile(int fd, off_t offset, size_t size, void *data); 30 static int64_t WriteFile(int fd, const void *data, off_t offset, size_t size); 31 }; 32 33 class FileRangeLock { 34 public: 35 FileRangeLock(int fd, off_t offset, size_t size); 36 ~FileRangeLock(); 37 38 private: 39 int fd_{-1}; 40 off_t offset_{0}; 41 size_t size_{0}; 42 bool lockFailed_{false}; 43 int xcollieId_{0}; 44 }; 45 } // namespace FileManagement 46 } // namespace OHOS 47 48 #endif 49