1 /* 2 * Copyright (c) 2022-2023 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 MONITOR_H 17 #define MONITOR_H 18 19 #include <memory> 20 #include <set> 21 22 #include <sys/inotify.h> 23 24 #include "nocopyable.h" 25 26 #include "i_context.h" 27 #include "i_device_mgr.h" 28 #include "i_epoll_event_source.h" 29 30 namespace OHOS { 31 namespace Msdp { 32 namespace DeviceStatus { 33 class Monitor final : public IEpollEventSource { 34 public: 35 Monitor() = default; 36 DISALLOW_COPY_AND_MOVE(Monitor); 37 ~Monitor(); 38 39 int32_t GetFd() const override; 40 void Dispatch(const struct epoll_event &ev) override; 41 void SetDeviceMgr(IDeviceMgr *devMgr); 42 int32_t Enable(); 43 void Disable(); 44 45 private: 46 int32_t OpenConnection(); 47 int32_t EnableReceiving(); 48 void ReceiveDevice(); 49 void HandleInotifyEvent(struct inotify_event *event) const; 50 void AddDevice(const std::string &devNode) const; 51 void RemoveDevice(const std::string &devNode) const; 52 53 private: 54 int32_t inotifyFd_ { -1 }; 55 int32_t devWd_ { -1 }; 56 IDeviceMgr *devMgr_ { nullptr }; 57 }; 58 GetFd()59inline int32_t Monitor::GetFd() const 60 { 61 return inotifyFd_; 62 } 63 } // namespace DeviceStatus 64 } // namespace Msdp 65 } // namespace OHOS 66 #endif // MONITOR_H