1 /*
2  * Copyright (C) 2016-2019 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 "EvsEnumerator.h"
18 #include "EvsGlDisplay.h"
19 #include "ServiceNames.h"
20 
21 #include <hidl/HidlTransportSupport.h>
22 #include <utils/Errors.h>
23 #include <utils/Log.h>
24 #include <utils/StrongPointer.h>
25 
26 #include <unistd.h>
27 
28 #include <atomic>
29 
30 // libhidl:
31 using ::android::hardware::configureRpcThreadpool;
32 using ::android::hardware::joinRpcThreadpool;
33 
34 // Generated HIDL files
35 using ::android::frameworks::automotive::display::V1_0::IAutomotiveDisplayProxyService;
36 using ::android::hardware::automotive::evs::V1_1::IEvsDisplay;
37 using ::android::hardware::automotive::evs::V1_1::IEvsEnumerator;
38 
39 using ::android::hardware::automotive::evs::V1_1::implementation::EvsEnumerator;
40 
main()41 int main() {
42     LOG(INFO) << "EVS Hardware Enumerator service is starting";
43 
44     android::sp<IAutomotiveDisplayProxyService> carWindowService =
45             IAutomotiveDisplayProxyService::getService("default");
46     if (carWindowService == nullptr) {
47         LOG(ERROR) << "Cannot use AutomotiveDisplayProxyService.  Exiting.";
48         return 1;
49     }
50 
51 #ifdef EVS_DEBUG
52     SetMinimumLogSeverity(android::base::DEBUG);
53 #endif
54 
55     // Start a thread to monitor hotplug devices
56     std::atomic<bool> running{true};
57     std::thread hotplugHandler(EvsEnumerator::EvsHotplugThread, std::ref(running));
58 
59     android::sp<IEvsEnumerator> service = new EvsEnumerator(carWindowService);
60 
61     configureRpcThreadpool(1, true /* callerWillJoin */);
62 
63     // Register our service -- if somebody is already registered by our name,
64     // they will be killed (their thread pool will throw an exception).
65     android::status_t status = service->registerAsService(kEnumeratorServiceName);
66     if (status == android::OK) {
67         LOG(DEBUG) << kEnumeratorServiceName << " is ready.";
68         joinRpcThreadpool();
69     } else {
70         LOG(ERROR) << "Could not register service " << kEnumeratorServiceName << " (" << status
71                    << ").";
72     }
73 
74     // Exit a hotplug device thread
75     running = false;
76     if (hotplugHandler.joinable()) {
77         hotplugHandler.join();
78     }
79 
80     // In normal operation, we don't expect the thread pool to exit
81     LOG(ERROR) << "EVS Hardware Enumerator is shutting down";
82     return 1;
83 }
84