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 <android-base/logging.h>
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 "Enumerator.h"
27
28
29 // libhidl:
30 using android::hardware::configureRpcThreadpool;
31 using android::hardware::joinRpcThreadpool;
32
33 // Generated HIDL files
34 using android::hardware::automotive::evs::V1_1::IEvsEnumerator;
35 using android::hardware::automotive::evs::V1_0::IEvsDisplay;
36
37 // The namespace in which all our implementation code lives
38 using namespace android::automotive::evs::V1_1::implementation;
39 using namespace android;
40
41
startService(const char * hardwareServiceName,const char * managerServiceName)42 static void startService(const char *hardwareServiceName, const char * managerServiceName) {
43 LOG(INFO) << "EVS managed service connecting to hardware service at " << hardwareServiceName;
44 android::sp<Enumerator> service = new Enumerator();
45 if (!service->init(hardwareServiceName)) {
46 LOG(ERROR) << "Failed to connect to hardware service - quitting from registrationThread";
47 exit(1);
48 }
49
50 // Register our service -- if somebody is already registered by our name,
51 // they will be killed (their thread pool will throw an exception).
52 LOG(INFO) << "EVS managed service is starting as " << managerServiceName;
53 status_t status = service->registerAsService(managerServiceName);
54 if (status != OK) {
55 LOG(ERROR) << "Could not register service " << managerServiceName
56 << " status = " << status << " - quitting from registrationThread";
57 exit(2);
58 }
59
60 LOG(INFO) << "Registration complete";
61 }
62
63
main(int argc,char ** argv)64 int main(int argc, char** argv) {
65 LOG(INFO) << "EVS manager starting";
66
67 #ifdef EVS_DEBUG
68 SetMinimumLogSeverity(android::base::DEBUG);
69 #endif
70
71 // Set up default behavior, then check for command line options
72 bool printHelp = false;
73 const char* evsHardwareServiceName = kHardwareEnumeratorName;
74 for (int i=1; i< argc; i++) {
75 if (strcmp(argv[i], "--mock") == 0) {
76 evsHardwareServiceName = kMockEnumeratorName;
77 } else if (strcmp(argv[i], "--target") == 0) {
78 i++;
79 if (i >= argc) {
80 LOG(ERROR) << "--target <service> was not provided with a service name";
81 } else {
82 evsHardwareServiceName = argv[i];
83 }
84 } else if (strcmp(argv[i], "--help") == 0) {
85 printHelp = true;
86 } else {
87 printf("Ignoring unrecognized command line arg '%s'\n", argv[i]);
88 printHelp = true;
89 }
90 }
91 if (printHelp) {
92 printf("Options include:\n");
93 printf(" --mock Connect to the mock driver at EvsEnumeratorHw-Mock\n");
94 printf(" --target <service_name> Connect to the named IEvsEnumerator service");
95 }
96
97
98 // Prepare the RPC serving thread pool. We're configuring it with no additional
99 // threads beyond the main thread which will "join" the pool below.
100 configureRpcThreadpool(1, true /* callerWillJoin */);
101
102 // The connection to the underlying hardware service must happen on a dedicated thread to ensure
103 // that the hwbinder response can be processed by the thread pool without blocking.
104 std::thread registrationThread(startService, evsHardwareServiceName, kManagedEnumeratorName);
105
106 // Send this main thread to become a permanent part of the thread pool.
107 // This is not expected to return.
108 LOG(INFO) << "Main thread entering thread pool";
109 joinRpcThreadpool();
110
111 // In normal operation, we don't expect the thread pool to exit
112 LOG(ERROR) << "EVS Hardware Enumerator is shutting down";
113 return 1;
114 }
115