1 /* 2 * Copyright (C) 2016-2019 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 #include <unistd.h> 18 #include <atomic> 19 20 #include <hidl/HidlTransportSupport.h> 21 #include <utils/Errors.h> 22 #include <utils/StrongPointer.h> 23 #include <utils/Log.h> 24 25 #include "ServiceNames.h" 26 #include "EvsEnumerator.h" 27 #include "EvsGlDisplay.h" 28 29 30 // libhidl: 31 using android::hardware::configureRpcThreadpool; 32 using android::hardware::joinRpcThreadpool; 33 34 // Generated HIDL files 35 using android::hardware::automotive::evs::V1_1::IEvsEnumerator; 36 using android::hardware::automotive::evs::V1_1::IEvsDisplay; 37 using android::frameworks::automotive::display::V1_0::IAutomotiveDisplayProxyService; 38 39 // The namespace in which all our implementation code lives 40 using namespace android::hardware::automotive::evs::V1_1::implementation; 41 using namespace android; 42 43 main()44int main() { 45 LOG(INFO) << "EVS Hardware Enumerator service is starting"; 46 47 android::sp<IAutomotiveDisplayProxyService> carWindowService = 48 IAutomotiveDisplayProxyService::getService("default"); 49 if (carWindowService == nullptr) { 50 LOG(ERROR) << "Cannot use AutomotiveDisplayProxyService. Exiting."; 51 return 1; 52 } 53 54 #ifdef EVS_DEBUG 55 SetMinimumLogSeverity(android::base::DEBUG); 56 #endif 57 58 // Start a thread to listen video device addition events. 59 std::atomic<bool> running { true }; 60 std::thread ueventHandler(EvsEnumerator::EvsUeventThread, std::ref(running)); 61 62 android::sp<IEvsEnumerator> service = new EvsEnumerator(carWindowService); 63 64 configureRpcThreadpool(1, true /* callerWillJoin */); 65 66 // Register our service -- if somebody is already registered by our name, 67 // they will be killed (their thread pool will throw an exception). 68 status_t status = service->registerAsService(kEnumeratorServiceName); 69 if (status == OK) { 70 LOG(DEBUG) << kEnumeratorServiceName << " is ready."; 71 joinRpcThreadpool(); 72 } else { 73 LOG(ERROR) << "Could not register service " << kEnumeratorServiceName 74 << " (" << status << ")."; 75 } 76 77 // Exit a uevent handler thread. 78 running = false; 79 if (ueventHandler.joinable()) { 80 ueventHandler.join(); 81 } 82 83 // In normal operation, we don't expect the thread pool to exit 84 LOG(ERROR) << "EVS Hardware Enumerator is shutting down"; 85 return 1; 86 } 87