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 MMI_HOT_PLUG_DETECTOR_H 17 #define MMI_HOT_PLUG_DETECTOR_H 18 19 #include <string> 20 21 #include "nocopyable.h" 22 #include "unique_fd.h" 23 24 namespace OHOS { 25 namespace MMI { 26 class HotplugDetector final { 27 public: 28 using callback = std::function<void(std::string)>; 29 HotplugDetector(); 30 ~HotplugDetector(); 31 DISALLOW_COPY_AND_MOVE(HotplugDetector); 32 33 bool Init(const callback& addFunc, const callback& removeFunc); 34 void Stop(); 35 void OnEvent() const; 36 GetFd()37 int32_t GetFd() const 38 { 39 return inotifyFd_; 40 } 41 42 private: 43 bool Scan() const; 44 45 callback addFunc_; 46 callback removeFunc_; 47 48 UniqueFd inotifyFd_; 49 }; 50 } // namespace MMI 51 } // namespace OHOS 52 #endif // MMI_HOT_PLUG_DETECTOR_H