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