1 /* 2 * Copyright (c) 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 MESSAGE_PARCEL_WARP_H 17 #define MESSAGE_PARCEL_WARP_H 18 19 #include "api/visibility.h" 20 #include "message_parcel.h" 21 22 namespace OHOS { 23 namespace MiscServices { 24 25 constexpr int64_t DEFAULT_MAX_RAW_DATA_SIZE = 128 * 1024 * 1024; // 128M 26 27 class API_EXPORT MessageParcelWarp { 28 public: 29 MessageParcelWarp(); 30 ~MessageParcelWarp(); 31 32 bool WriteRawData(MessageParcel &parcelPata, const void *data, size_t size); 33 const void *ReadRawData(MessageParcel &parcelData, size_t size); GetRawDataSize()34 inline int64_t GetRawDataSize() 35 { 36 return maxRawDataSize_; 37 } 38 int CreateTmpFd(); 39 int GetWriteDataFd(); 40 bool MemcpyData(void *ptr, size_t size, const void *data, size_t count); 41 42 private: 43 std::shared_ptr<char> rawData_ = nullptr; 44 int writeRawDataFd_ = -1; 45 int readRawDataFd_ = -1; 46 void *kernelMappedWrite_ = nullptr; 47 void *kernelMappedRead_ = nullptr; 48 size_t rawDataSize_ = 0; 49 bool canWrite_ = true; 50 bool canRead_ = true; 51 int64_t maxRawDataSize_ = DEFAULT_MAX_RAW_DATA_SIZE; 52 }; 53 } // namespace MiscServices 54 } // namespace OHOS 55 #endif // MESSAGE_PARCEL_WARP_H