1/* 2 * Copyright (C) 2010 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 23 * THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#ifndef Arguments_h 27#define Arguments_h 28 29#include "ArgumentDecoder.h" 30#include "ArgumentEncoder.h" 31 32namespace IPC { 33 34template<size_t index, typename... Elements> 35struct TupleCoder { 36 static void encode(ArgumentEncoder& encoder, const std::tuple<Elements...>& tuple) 37 { 38 encoder << std::get<sizeof...(Elements) - index>(tuple); 39 TupleCoder<index - 1, Elements...>::encode(encoder, tuple); 40 } 41 42 static bool decode(ArgumentDecoder& decoder, std::tuple<Elements...>& tuple) 43 { 44 if (!decoder.decode(std::get<sizeof...(Elements) - index>(tuple))) 45 return false; 46 return TupleCoder<index - 1, Elements...>::decode(decoder, tuple); 47 } 48}; 49 50template<typename... Elements> 51struct TupleCoder<0, Elements...> { 52 static void encode(ArgumentEncoder&, const std::tuple<Elements...>&) 53 { 54 } 55 56 static bool decode(ArgumentDecoder&, std::tuple<Elements...>&) 57 { 58 return true; 59 } 60}; 61 62template<typename... Elements> struct ArgumentCoder<std::tuple<Elements...>> { 63 static void encode(ArgumentEncoder& encoder, const std::tuple<Elements...>& tuple) 64 { 65 TupleCoder<sizeof...(Elements), Elements...>::encode(encoder, tuple); 66 } 67 68 static bool decode(ArgumentDecoder& decoder, std::tuple<Elements...>& tuple) 69 { 70 return TupleCoder<sizeof...(Elements), Elements...>::decode(decoder, tuple); 71 } 72}; 73 74template<typename... Types> 75struct Arguments { 76 typedef std::tuple<typename std::decay<Types>::type...> ValueType; 77 78 Arguments(Types&&... values) 79 : arguments(std::forward<Types>(values)...) 80 { 81 } 82 83 void encode(ArgumentEncoder& encoder) const 84 { 85 ArgumentCoder<std::tuple<Types...>>::encode(encoder, arguments); 86 } 87 88 static bool decode(ArgumentDecoder& decoder, Arguments& result) 89 { 90 return ArgumentCoder<std::tuple<Types...>>::decode(decoder, result.arguments); 91 } 92 93 std::tuple<Types...> arguments; 94}; 95 96} // namespace IPC 97 98#endif // Arguments_h 99