1 /* 2 * Copyright (C) 2021 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 #ifndef HDC_FILE_DESCRIPTOR_H 16 #define HDC_FILE_DESCRIPTOR_H 17 #include "common.h" 18 19 namespace Hdc { 20 class HdcFileDescriptor { 21 public: 22 // callerContext, normalFinish, errorString 23 using CmdResultCallback = std::function<bool(const void *, const bool, const string)>; 24 // callerContext, readBuf, readIOByes 25 using CallBackWhenRead = std::function<bool(const void *, uint8_t *, const int)>; 26 HdcFileDescriptor(uv_loop_t *loopIn, int fdToRead, void *callerContextIn, CallBackWhenRead callbackReadIn, 27 CmdResultCallback callbackFinishIn); 28 virtual ~HdcFileDescriptor(); 29 int Write(uint8_t *data, int size); 30 int WriteWithMem(uint8_t *data, int size); 31 32 bool ReadyForRelease(); 33 bool StartWork(); 34 void StopWork(bool tryCloseFdIo, std::function<void()> closeFdCallback); 35 36 protected: 37 private: 38 struct CtxFileIO { 39 uv_fs_t fs; 40 uint8_t *bufIO; 41 HdcFileDescriptor *thisClass; 42 }; 43 static void OnFileIO(uv_fs_t *req); 44 int LoopRead(); 45 46 std::function<void()> callbackCloseFd; 47 CmdResultCallback callbackFinish; 48 CallBackWhenRead callbackRead; 49 uv_loop_t *loop; 50 uv_fs_t reqClose; 51 void *callerContext; 52 bool workContinue; 53 int fdIO; 54 int refIO; 55 }; 56 } // namespace Hdc 57 58 #endif // HDC_FILE_DESCRIPTOR_H