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
startService(const char * hardwareServiceName,const char * managerServiceName)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
main(int argc,char ** argv)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