1 /* 2 * Copyright (C) 2022 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef CHRE_HOST_TIME_SYNCER_H_ 18 #define CHRE_HOST_TIME_SYNCER_H_ 19 20 #include <cstdint> 21 #include <string> 22 23 #include "chre_connection.h" 24 25 namespace android::chre { 26 27 using hardware::contexthub::common::implementation::ChreConnection; 28 29 /** The functions synchronizing time between the Context hub and Android. */ 30 class TimeSyncer final { 31 public: 32 /** 33 * Sends time sync message to Context hub and retries numRetries times until 34 * success. 35 * 36 * If the platform doesn't require the time sync the request will be ignored 37 * and true is returned. 38 * 39 * @return true if success, false otherwise. 40 */ 41 static bool sendTimeSyncWithRetry(ChreConnection *connection, 42 size_t numOfRetries, 43 useconds_t retryDelayUs); 44 45 /** 46 * Sends a time sync message to Context hub for once. 47 * 48 * If the platform doesn't require the time sync the request will be ignored 49 * and true is returned. 50 * 51 * @return true if success, false otherwise. 52 */ 53 static bool sendTimeSync(ChreConnection *connection); 54 55 private: 56 TimeSyncer() = default; 57 }; 58 59 } // namespace android::chre 60 61 #endif // CHRE_HOST_TIME_SYNCER_H_