1 /* 2 * Copyright (C) 2016 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 19 #include <hidl/HidlTransportSupport.h> 20 #include <utils/Errors.h> 21 #include <utils/StrongPointer.h> 22 #include <utils/Log.h> 23 24 #include "ServiceNames.h" 25 #include "Enumerator.h" 26 27 28 // libhidl: 29 using android::hardware::configureRpcThreadpool; 30 using android::hardware::joinRpcThreadpool; 31 32 // Generated HIDL files 33 using android::hardware::automotive::evs::V1_0::IEvsEnumerator; 34 using android::hardware::automotive::evs::V1_0::IEvsDisplay; 35 36 // The namespace in which all our implementation code lives 37 using namespace android::automotive::evs::V1_0::implementation; 38 using namespace android; 39 40 41 static void startService(const char *hardwareServiceName, const char * managerServiceName) { 42 ALOGI("EVS managed service connecting to hardware service at %s", hardwareServiceName); 43 android::sp<Enumerator> service = new Enumerator(); 44 if (!service->init(hardwareServiceName)) { 45 ALOGE("Failed to connect to hardware service - quitting from registrationThread"); 46 exit(1); 47 } 48 49 // Register our service -- if somebody is already registered by our name, 50 // they will be killed (their thread pool will throw an exception). 51 ALOGI("EVS managed service is starting as %s", managerServiceName); 52 status_t status = service->registerAsService(managerServiceName); 53 if (status != OK) { 54 ALOGE("Could not register service %s (%d) - quitting from registrationThread", 55 managerServiceName, status); 56 exit(2); 57 } 58 59 ALOGD("Registration complete"); 60 } 61 62 63 int main(int argc, char** argv) { 64 ALOGI("EVS manager starting\n"); 65 66 // Set up default behavior, then check for command line options 67 bool printHelp = false; 68 const char* evsHardwareServiceName = kHardwareEnumeratorName; 69 for (int i=1; i< argc; i++) { 70 if (strcmp(argv[i], "--mock") == 0) { 71 evsHardwareServiceName = kMockEnumeratorName; 72 } else if (strcmp(argv[i], "--target") == 0) { 73 i++; 74 if (i >= argc) { 75 ALOGE("--target <service> was not provided with a service name\n"); 76 } else { 77 evsHardwareServiceName = argv[i]; 78 } 79 } else if (strcmp(argv[i], "--help") == 0) { 80 printHelp = true; 81 } else { 82 printf("Ignoring unrecognized command line arg '%s'\n", argv[i]); 83 printHelp = true; 84 } 85 } 86 if (printHelp) { 87 printf("Options include:\n"); 88 printf(" --mock Connect to the mock driver at EvsEnumeratorHw-Mock\n"); 89 printf(" --target <service_name> Connect to the named IEvsEnumerator service"); 90 } 91 92 93 // Prepare the RPC serving thread pool. We're configuring it with no additional 94 // threads beyond the main thread which will "join" the pool below. 95 configureRpcThreadpool(1, true /* callerWillJoin */); 96 97 // The connection to the underlying hardware service must happen on a dedicated thread to ensure 98 // that the hwbinder response can be processed by the thread pool without blocking. 99 std::thread registrationThread(startService, evsHardwareServiceName, kManagedEnumeratorName); 100 101 // Send this main thread to become a permanent part of the thread pool. 102 // This is not expected to return. 103 ALOGD("Main thread entering thread pool"); 104 joinRpcThreadpool(); 105 106 // In normal operation, we don't expect the thread pool to exit 107 ALOGE("EVS Hardware Enumerator is shutting down"); 108 return 1; 109 } 110
