Steven Moreland | ff189a0 | 2017-09-15 16:22:48 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2017 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 <hidladapter/HidlBinderAdapter.h> |
| 18 | |
| 19 | #include <android/hidl/base/1.0/IBase.h> |
| 20 | #include <android/hidl/manager/1.0/IServiceManager.h> |
| 21 | #include <hidl/HidlTransportSupport.h> |
| 22 | |
| 23 | #include <iostream> |
| 24 | #include <map> |
| 25 | #include <string> |
| 26 | |
| 27 | namespace android { |
| 28 | namespace hardware { |
| 29 | namespace details { |
| 30 | |
| 31 | int adapterMain(const std::string& package, int argc, char** argv, |
| 32 | const AdaptersFactory& adapters) { |
| 33 | using android::hardware::configureRpcThreadpool; |
| 34 | using android::hidl::base::V1_0::IBase; |
| 35 | using android::hidl::manager::V1_0::IServiceManager; |
| 36 | |
| 37 | if (argc != 4) { |
| 38 | std::cerr << "usage: " << argv[0] << " interface-name instance-name number-of-threads." |
| 39 | << std::endl; |
| 40 | return 1; |
| 41 | } |
| 42 | |
| 43 | std::string interfaceName = package + "::" + argv[1]; |
| 44 | std::string instanceName = argv[2]; |
| 45 | int threadNumber = std::stoi(argv[3]); |
| 46 | |
| 47 | if (threadNumber <= 0) { |
| 48 | std::cerr << "ERROR: invalid thread number " << threadNumber |
| 49 | << " must be a positive integer."; |
| 50 | } |
| 51 | |
| 52 | auto it = adapters.find(interfaceName); |
| 53 | if (it == adapters.end()) { |
| 54 | std::cerr << "ERROR: could not resolve " << interfaceName << "." << std::endl; |
| 55 | return 1; |
| 56 | } |
| 57 | |
| 58 | std::cout << "Trying to adapt down " << interfaceName << "/" << instanceName << std::endl; |
| 59 | |
| 60 | configureRpcThreadpool(threadNumber, false /* callerWillJoin */); |
| 61 | |
| 62 | sp<IServiceManager> manager = IServiceManager::getService(); |
| 63 | if (manager == nullptr) { |
| 64 | std::cerr << "ERROR: could not retrieve service manager." << std::endl; |
| 65 | return 1; |
| 66 | } |
| 67 | |
| 68 | sp<IBase> implementation = manager->get(interfaceName, instanceName).withDefault(nullptr); |
| 69 | if (implementation == nullptr) { |
| 70 | std::cerr << "ERROR: could not retrieve desired implementation" << std::endl; |
| 71 | return 1; |
| 72 | } |
| 73 | |
| 74 | sp<IBase> adapter = it->second(implementation); |
| 75 | if (adapter == nullptr) { |
| 76 | std::cerr << "ERROR: could not create adapter." << std::endl; |
| 77 | return 1; |
| 78 | } |
| 79 | |
| 80 | bool replaced = manager->add(instanceName, adapter).withDefault(false); |
| 81 | if (!replaced) { |
| 82 | std::cerr << "ERROR: could not register the service with the service manager." << std::endl; |
| 83 | return 1; |
| 84 | } |
| 85 | |
| 86 | std::cout << "Press any key to disassociate adapter." << std::endl; |
| 87 | getchar(); |
| 88 | |
| 89 | bool restored = manager->add(instanceName, implementation).withDefault(false); |
| 90 | if (!restored) { |
| 91 | std::cerr << "ERROR: could not re-register interface with the service manager." |
| 92 | << std::endl; |
| 93 | return 1; |
| 94 | } |
| 95 | |
| 96 | std::cout << "Success." << std::endl; |
| 97 | |
| 98 | return 0; |
| 99 | } |
| 100 | |
| 101 | // If an interface is adapted to 1.0, it can then not be adapted to 1.1 in the same process. |
| 102 | // This poses a problem in the following scenario: |
| 103 | // auto interface = new V1_1::implementation::IFoo; |
| 104 | // hidlObject1_0->foo(interface) // adaptation set at 1.0 |
| 105 | // hidlObject1_1->bar(interface) // adaptation still is 1.0 |
| 106 | // This could be solved by keeping a map of IBase,fqName -> IBase, but then you end up |
| 107 | // with multiple names for the same interface. |
| 108 | sp<IBase> adaptWithDefault(const sp<IBase>& something, |
| 109 | const std::function<sp<IBase>()>& makeDefault) { |
| 110 | static std::map<sp<IBase>, sp<IBase>> sAdapterMap; |
| 111 | |
| 112 | auto it = sAdapterMap.find(something); |
| 113 | if (it == sAdapterMap.end()) { |
| 114 | it = sAdapterMap.insert(it, {something, makeDefault()}); |
| 115 | } |
| 116 | |
| 117 | return it->second; |
| 118 | } |
| 119 | |
| 120 | } // namespace details |
| 121 | } // namespace hardware |
| 122 | } // namespace android |