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      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 <hidl/HidlTransportSupport.h>
     18 #include <sys/wait.h>
     19 #include <utils/Log.h>
     20 #include <utils/Errors.h>
     21 #include <utils/StrongPointer.h>
     22 
     23 #ifndef ANDROID_HIDL_LEGACY_SUPPORT_H
     24 #define ANDROID_HIDL_LEGACY_SUPPORT_H
     25 
     26 namespace android {
     27 namespace hardware {
     28 
     29 /**
     30  * Registers passthrough service implementation.
     31  */
     32 template<class Interface>
     33 __attribute__((warn_unused_result))
     34 status_t registerPassthroughServiceImplementation(
     35         std::string name = "default") {
     36     sp<Interface> service = Interface::getService(name, true /* getStub */);
     37 
     38     if (service == nullptr) {
     39         ALOGE("Could not get passthrough implementation for %s/%s.",
     40             Interface::descriptor, name.c_str());
     41         return EXIT_FAILURE;
     42     }
     43 
     44     LOG_FATAL_IF(service->isRemote(), "Implementation of %s/%s is remote!",
     45             Interface::descriptor, name.c_str());
     46 
     47     status_t status = service->registerAsService(name);
     48 
     49     if (status == OK) {
     50         ALOGI("Registration complete for %s/%s.",
     51             Interface::descriptor, name.c_str());
     52     } else {
     53         ALOGE("Could not register service %s/%s (%d).",
     54             Interface::descriptor, name.c_str(), status);
     55     }
     56 
     57     return status;
     58 }
     59 
     60 /**
     61  * Creates default passthrough service implementation. This method never returns.
     62  *
     63  * Return value is exit status.
     64  */
     65 template<class Interface>
     66 __attribute__((warn_unused_result))
     67 status_t defaultPassthroughServiceImplementation(std::string name,
     68                                             size_t maxThreads = 1) {
     69     configureRpcThreadpool(maxThreads, true);
     70     status_t result = registerPassthroughServiceImplementation<Interface>(name);
     71 
     72     if (result != OK) {
     73         return result;
     74     }
     75 
     76     joinRpcThreadpool();
     77     return UNKNOWN_ERROR;
     78 }
     79 template<class Interface>
     80 __attribute__((warn_unused_result))
     81 status_t defaultPassthroughServiceImplementation(size_t maxThreads = 1) {
     82     return defaultPassthroughServiceImplementation<Interface>("default", maxThreads);
     83 }
     84 
     85 }  // namespace hardware
     86 }  // namespace android
     87 
     88 #endif  // ANDROID_HIDL_LEGACY_SUPPORT_H
     89