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 "EnumeratorProxy.h"
19 #include "ServiceNames.h"
20
21 #include <android-base/logging.h>
22 #include <hidl/HidlTransportSupport.h>
23 #include <utils/Errors.h>
24 #include <utils/Log.h>
25 #include <utils/StrongPointer.h>
26
27 #include <unistd.h>
28
29 #include <mutex> // NOLINT
30 #include <string>
31
32 using android::OK;
33 using android::status_t;
34 using android::automotive::evs::V1_1::implementation::Enumerator;
35 using android::automotive::evs::V1_1::implementation::EnumeratorProxy;
36 using android::hardware::configureRpcThreadpool;
37 using android::hardware::joinRpcThreadpool;
38 using android::hardware::automotive::evs::V1_0::IEvsDisplay;
39 using android::hardware::automotive::evs::V1_1::IEvsEnumerator;
40
41 struct Context {
42 mutable std::mutex lock;
43 const char* hardwareServiceName;
44 const char* managerServiceName;
45 std::unique_ptr<IEvsEnumerator> enumerator = nullptr;
46 };
47
startService(Context * context)48 static void startService(Context* context) {
49 LOG(INFO) << "EVS managed service connecting to hardware service at "
50 << context->hardwareServiceName;
51 std::lock_guard<std::mutex> lock_guard{context->lock};
52 context->enumerator =
53 std::make_unique<EnumeratorProxy>(Enumerator::build(context->hardwareServiceName));
54 if (!context->enumerator) {
55 LOG(ERROR) << "Failed to connect to hardware service - quitting from registrationThread";
56 exit(1);
57 }
58
59 // Register our service -- if somebody is already registered by our name,
60 // they will be killed (their thread pool will throw an exception).
61 LOG(INFO) << "EVS managed service is starting as " << context->managerServiceName;
62 if (status_t status = context->enumerator->registerAsService(); status != OK) {
63 LOG(ERROR) << "Could not register service " << context->managerServiceName
64 << " status = " << status << " - quitting from registrationThread";
65 exit(2);
66 }
67
68 LOG(INFO) << "Registration complete";
69 }
70
main(int argc,char ** argv)71 int main(int argc, char** argv) {
72 LOG(INFO) << "EVS manager starting";
73
74 #ifdef EVS_DEBUG
75 SetMinimumLogSeverity(android::base::DEBUG);
76 #endif
77
78 // Set up default behavior, then check for command line options
79 bool printHelp = false;
80 const char* evsHardwareServiceName = kHardwareEnumeratorName;
81 for (int i = 1; i < argc; i++) {
82 if (strcmp(argv[i], "--mock") == 0) {
83 evsHardwareServiceName = kMockEnumeratorName;
84 } else if (strcmp(argv[i], "--target") == 0) {
85 i++;
86 if (i >= argc) {
87 LOG(ERROR) << "--target <service> was not provided with a service name";
88 } else {
89 evsHardwareServiceName = argv[i];
90 }
91 } else if (strcmp(argv[i], "--help") == 0) {
92 printHelp = true;
93 } else {
94 printf("Ignoring unrecognized command line arg '%s'\n", argv[i]);
95 printHelp = true;
96 }
97 }
98 if (printHelp) {
99 printf("Options include:\n");
100 printf(" --mock Connect to the mock driver at EvsEnumeratorHw-Mock\n");
101 printf(" --target <service_name> Connect to the named IEvsEnumerator service");
102 }
103
104 // Prepare the RPC serving thread pool. We're configuring it with no additional
105 // threads beyond the main thread which will "join" the pool below.
106 configureRpcThreadpool(1, true /* callerWillJoin */);
107
108 // The connection to the underlying hardware service must happen on a dedicated thread to ensure
109 // that the hwbinder response can be processed by the thread pool without blocking.
110 Context context{.hardwareServiceName = evsHardwareServiceName,
111 .managerServiceName = kManagedEnumeratorName,
112 .enumerator = nullptr};
113
114 std::thread registrationThread(startService, &context);
115
116 // Send this main thread to become a permanent part of the thread pool.
117 // This is not expected to return.
118 LOG(INFO) << "Main thread entering thread pool";
119 joinRpcThreadpool();
120
121 // In normal operation, we don't expect the thread pool to exit
122 LOG(ERROR) << "EVS Hardware Enumerator is shutting down";
123 return 1;
124 }
125