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 // This file is copied from 18 // hardware/interfaces/wifi/1.0/vts/functional/wifi_hidl_call_util.h 19 // Please make sure these two file are consistent. 20 21 #pragma once 22 23 #include <functional> 24 #include <tuple> 25 #include <type_traits> 26 #include <utility> 27 28 #include <VtsHalHidlTargetTestBase.h> 29 30 namespace { 31 namespace detail { 32 template <typename> 33 struct functionArgSaver; 34 35 // Provides a std::function that takes one argument, and a buffer 36 // wherein the function will store its argument. The buffer has 37 // the same type as the argument, but with const and reference 38 // modifiers removed. 39 template <typename ArgT> 40 struct functionArgSaver<std::function<void(ArgT)>> final { 41 using StorageT = typename std::remove_const< 42 typename std::remove_reference<ArgT>::type>::type; 43 44 std::function<void(ArgT)> saveArgs = [this](ArgT arg) { 45 this->saved_values = arg; 46 }; 47 48 StorageT saved_values; 49 }; 50 51 // Provides a std::function that takes two arguments, and a buffer 52 // wherein the function will store its arguments. The buffer is a 53 // std::pair, whose elements have the same types as the arguments 54 // (but with const and reference modifiers removed). 55 template <typename Arg1T, typename Arg2T> 56 struct functionArgSaver<std::function<void(Arg1T, Arg2T)>> final { 57 using StorageT = 58 std::pair<typename std::remove_const< 59 typename std::remove_reference<Arg1T>::type>::type, 60 typename std::remove_const< 61 typename std::remove_reference<Arg2T>::type>::type>; 62 63 std::function<void(Arg1T, Arg2T)> saveArgs = [this](Arg1T arg1, 64 Arg2T arg2) { 65 this->saved_values = {arg1, arg2}; 66 }; 67 68 StorageT saved_values; 69 }; 70 71 // Provides a std::function that takes three or more arguments, and a 72 // buffer wherein the function will store its arguments. The buffer is a 73 // std::tuple whose elements have the same types as the arguments (but 74 // with const and reference modifiers removed). 75 template <typename... ArgT> 76 struct functionArgSaver<std::function<void(ArgT...)>> final { 77 using StorageT = std::tuple<typename std::remove_const< 78 typename std::remove_reference<ArgT>::type>::type...>; 79 80 std::function<void(ArgT...)> saveArgs = [this](ArgT... arg) { 81 this->saved_values = {arg...}; 82 }; 83 84 StorageT saved_values; 85 }; 86 87 // Invokes |method| on |object|, providing |method| a CallbackT as the 88 // final argument. Returns a copy of the parameters that |method| provided 89 // to CallbackT. (The parameters are returned by value.) 90 template <typename CallbackT, typename MethodT, typename ObjectT, 91 typename... ArgT> 92 typename functionArgSaver<CallbackT>::StorageT invokeMethod( 93 MethodT method, ObjectT object, ArgT&&... methodArg) { 94 functionArgSaver<CallbackT> result_buffer; 95 const auto& res = ((*object).*method)(std::forward<ArgT>(methodArg)..., 96 result_buffer.saveArgs); 97 EXPECT_TRUE(res.isOk()); 98 return result_buffer.saved_values; 99 } 100 } // namespace detail 101 } // namespace 102 103 // Invokes |method| on |strong_pointer|, passing provided arguments through to 104 // |method|. 105 // 106 // Returns either: 107 // - A copy of the result callback parameter (for callbacks with a single 108 // parameter), OR 109 // - A pair containing a copy of the result callback parameters (for callbacks 110 // with two parameters), OR 111 // - A tuple containing a copy of the result callback paramters (for callbacks 112 // with three or more parameters). 113 // 114 // Example usage: 115 // EXPECT_EQ(WifiStatusCode::SUCCESS, 116 // HIDL_INVOKE(strong_pointer, methodReturningWifiStatus).code); 117 // EXPECT_EQ(WifiStatusCode::SUCCESS, 118 // HIDL_INVOKE(strong_pointer, methodReturningWifiStatusAndOneMore) 119 // .first.code); 120 // EXPECT_EQ(WifiStatusCode::SUCCESS, std::get<0>( 121 // HIDL_INVOKE(strong_pointer, methodReturningWifiStatusAndTwoMore)) 122 // .code); 123 #define HIDL_INVOKE(strong_pointer, method, ...) \ 124 (detail::invokeMethod< \ 125 std::remove_reference<decltype(*strong_pointer)>::type::method##_cb>( \ 126 &std::remove_reference<decltype(*strong_pointer)>::type::method, \ 127 strong_pointer, ##__VA_ARGS__)) 128