1 /* 2 * Copyright (C) 2017 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 android_hardware_automotive_vehicle_V2_0_impl_PipeComm_H_ 18 #define android_hardware_automotive_vehicle_V2_0_impl_PipeComm_H_ 19 20 #include <mutex> 21 #include <vector> 22 #include "CommConn.h" 23 24 namespace android { 25 namespace hardware { 26 namespace automotive { 27 namespace vehicle { 28 namespace V2_0 { 29 30 namespace impl { 31 32 /** 33 * PipeComm opens a qemu pipe to connect to the emulator, allowing the emulator UI to access the 34 * Vehicle HAL and simulate changing properties. 35 * 36 * Since the pipe is a client, it directly implements CommConn, and only one PipeComm can be open 37 * at a time. 38 */ 39 class PipeComm : public CommConn { 40 public: 41 PipeComm(MessageProcessor* messageProcessor); 42 43 void start() override; 44 void stop() override; 45 46 std::vector<uint8_t> read() override; 47 int write(const std::vector<uint8_t>& data) override; 48 isOpen()49 inline bool isOpen() override { return mPipeFd > 0; } 50 51 private: 52 int mPipeFd; 53 }; 54 55 } // impl 56 57 } // namespace V2_0 58 } // namespace vehicle 59 } // namespace automotive 60 } // namespace hardware 61 } // namespace android 62 63 64 #endif // android_hardware_automotive_vehicle_V2_0_impl_PipeComm_H_ 65