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 16 #ifndef OHOS_DISTRIBUTED_HARDWARE_DHCONTEXT_H 17 #define OHOS_DISTRIBUTED_HARDWARE_DHCONTEXT_H 18 19 #include <memory> 20 #include <string> 21 #include <unordered_set> 22 #include <shared_mutex> 23 24 #include "device_type.h" 25 #include "event_bus.h" 26 #include "single_instance.h" 27 28 namespace OHOS { 29 namespace DistributedHardware { 30 class DHContext { 31 DECLARE_SINGLE_INSTANCE_BASE(DHContext); 32 public: 33 DHContext(); 34 ~DHContext(); 35 std::shared_ptr<EventBus> GetEventBus(); 36 const DeviceInfo& GetDeviceInfo(); 37 38 /* Save online device UUID and networkId when devices online */ 39 void AddOnlineDevice(const std::string &uuid, const std::string &networkId); 40 void RemoveOnlineDevice(const std::string &uuid); 41 bool IsDeviceOnline(const std::string &uuid); 42 size_t GetOnlineCount(); 43 std::string GetNetworkIdByUUID(const std::string &uuid); 44 std::string GetUUIDByNetworkId(const std::string &networkId); 45 46 /* DeviceId is which is hashed by sha256 */ 47 std::string GetUUIDByDeviceId(const std::string &deviceId); 48 49 private: 50 std::shared_ptr<EventBus> eventBus_; 51 DeviceInfo devInfo_ { "", "", "", 0 }; 52 std::mutex devMutex_; 53 54 /* Save online device uuid and networkId */ 55 std::unordered_map<std::string, std::string> onlineDeviceMap_; 56 57 /* Save online device hashed uuid and uuid */ 58 std::unordered_map<std::string, std::string> deviceIdUUIDMap_; 59 std::shared_mutex onlineDevMutex_; 60 }; 61 } 62 } 63 #endif