1 //
2 // execution/detail/submit_receiver.hpp
3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4 //
5 // Copyright (c) 2003-2021 Christopher M. Kohlhoff (chris at kohlhoff dot com)
6 //
7 // Distributed under the Boost Software License, Version 1.0. (See accompanying
8 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
9 //
10
11 #ifndef BOOST_ASIO_EXECUTION_DETAIL_SUBMIT_RECEIVER_HPP
12 #define BOOST_ASIO_EXECUTION_DETAIL_SUBMIT_RECEIVER_HPP
13
14 #if defined(_MSC_VER) && (_MSC_VER >= 1200)
15 # pragma once
16 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
17
18 #include <boost/asio/detail/config.hpp>
19 #include <boost/asio/detail/type_traits.hpp>
20 #include <boost/asio/detail/variadic_templates.hpp>
21 #include <boost/asio/execution/connect.hpp>
22 #include <boost/asio/execution/receiver.hpp>
23 #include <boost/asio/execution/set_done.hpp>
24 #include <boost/asio/execution/set_error.hpp>
25 #include <boost/asio/execution/set_value.hpp>
26 #include <boost/asio/traits/set_done_member.hpp>
27 #include <boost/asio/traits/set_error_member.hpp>
28 #include <boost/asio/traits/set_value_member.hpp>
29
30 #include <boost/asio/detail/push_options.hpp>
31
32 namespace boost {
33 namespace asio {
34 namespace execution {
35 namespace detail {
36
37 template <typename Sender, typename Receiver>
38 struct submit_receiver;
39
40 template <typename Sender, typename Receiver>
41 struct submit_receiver_wrapper
42 {
43 submit_receiver<Sender, Receiver>* p_;
44
submit_receiver_wrapperboost::asio::execution::detail::submit_receiver_wrapper45 explicit submit_receiver_wrapper(submit_receiver<Sender, Receiver>* p)
46 : p_(p)
47 {
48 }
49
50 #if defined(BOOST_ASIO_HAS_VARIADIC_TEMPLATES)
51
52 template <typename... Args>
53 typename enable_if<is_receiver_of<Receiver, Args...>::value>::type
set_valueboost::asio::execution::detail::submit_receiver_wrapper54 set_value(BOOST_ASIO_MOVE_ARG(Args)... args) BOOST_ASIO_RVALUE_REF_QUAL
55 BOOST_ASIO_NOEXCEPT_IF((is_nothrow_receiver_of<Receiver, Args...>::value))
56 {
57 execution::set_value(
58 BOOST_ASIO_MOVE_OR_LVALUE(
59 typename remove_cvref<Receiver>::type)(p_->r_),
60 BOOST_ASIO_MOVE_CAST(Args)(args)...);
61 delete p_;
62 }
63
64 #else // defined(BOOST_ASIO_HAS_VARIADIC_TEMPLATES)
65
set_valueboost::asio::execution::detail::submit_receiver_wrapper66 void set_value() BOOST_ASIO_RVALUE_REF_QUAL
67 BOOST_ASIO_NOEXCEPT_IF((is_nothrow_receiver_of<Receiver>::value))
68 {
69 execution::set_value(
70 BOOST_ASIO_MOVE_OR_LVALUE(
71 typename remove_cvref<Receiver>::type)(p_->r_));
72 delete p_;
73 }
74
75 #define BOOST_ASIO_PRIVATE_SUBMIT_RECEIVER_SET_VALUE_DEF(n) \
76 template <BOOST_ASIO_VARIADIC_TPARAMS(n)> \
77 typename enable_if<is_receiver_of<Receiver, \
78 BOOST_ASIO_VARIADIC_TARGS(n)>::value>::type \
79 set_value(BOOST_ASIO_VARIADIC_MOVE_PARAMS(n)) BOOST_ASIO_RVALUE_REF_QUAL \
80 BOOST_ASIO_NOEXCEPT_IF((is_nothrow_receiver_of< \
81 Receiver, BOOST_ASIO_VARIADIC_TARGS(n)>::value)) \
82 { \
83 execution::set_value( \
84 BOOST_ASIO_MOVE_OR_LVALUE( \
85 typename remove_cvref<Receiver>::type)(p_->r_), \
86 BOOST_ASIO_VARIADIC_MOVE_ARGS(n)); \
87 delete p_; \
88 } \
89 /**/
BOOST_ASIO_VARIADIC_GENERATEboost::asio::execution::detail::submit_receiver_wrapper90 BOOST_ASIO_VARIADIC_GENERATE(BOOST_ASIO_PRIVATE_SUBMIT_RECEIVER_SET_VALUE_DEF)
91 #undef BOOST_ASIO_PRIVATE_SUBMIT_RECEIVER_SET_VALUE_DEF
92
93 #endif // defined(BOOST_ASIO_HAS_VARIADIC_TEMPLATES)
94
95 template <typename E>
96 void set_error(BOOST_ASIO_MOVE_ARG(E) e)
97 BOOST_ASIO_RVALUE_REF_QUAL BOOST_ASIO_NOEXCEPT
98 {
99 execution::set_error(
100 BOOST_ASIO_MOVE_OR_LVALUE(
101 typename remove_cvref<Receiver>::type)(p_->r_),
102 BOOST_ASIO_MOVE_CAST(E)(e));
103 delete p_;
104 }
105
set_doneboost::asio::execution::detail::submit_receiver_wrapper106 void set_done() BOOST_ASIO_RVALUE_REF_QUAL BOOST_ASIO_NOEXCEPT
107 {
108 execution::set_done(
109 BOOST_ASIO_MOVE_OR_LVALUE(
110 typename remove_cvref<Receiver>::type)(p_->r_));
111 delete p_;
112 }
113 };
114
115 template <typename Sender, typename Receiver>
116 struct submit_receiver
117 {
118 typename remove_cvref<Receiver>::type r_;
119 #if defined(BOOST_ASIO_HAS_MOVE)
120 typename connect_result<Sender,
121 submit_receiver_wrapper<Sender, Receiver> >::type state_;
122 #else // defined(BOOST_ASIO_HAS_MOVE)
123 typename connect_result<Sender,
124 const submit_receiver_wrapper<Sender, Receiver>& >::type state_;
125 #endif // defined(BOOST_ASIO_HAS_MOVE)
126
127 #if defined(BOOST_ASIO_HAS_MOVE)
128 template <typename S, typename R>
submit_receiverboost::asio::execution::detail::submit_receiver129 explicit submit_receiver(BOOST_ASIO_MOVE_ARG(S) s, BOOST_ASIO_MOVE_ARG(R) r)
130 : r_(BOOST_ASIO_MOVE_CAST(R)(r)),
131 state_(execution::connect(BOOST_ASIO_MOVE_CAST(S)(s),
132 submit_receiver_wrapper<Sender, Receiver>(this)))
133 {
134 }
135 #else // defined(BOOST_ASIO_HAS_MOVE)
submit_receiverboost::asio::execution::detail::submit_receiver136 explicit submit_receiver(Sender s, Receiver r)
137 : r_(r),
138 state_(execution::connect(s,
139 submit_receiver_wrapper<Sender, Receiver>(this)))
140 {
141 }
142 #endif // defined(BOOST_ASIO_HAS_MOVE)
143 };
144
145 } // namespace detail
146 } // namespace execution
147 namespace traits {
148
149 #if !defined(BOOST_ASIO_HAS_DEDUCED_SET_VALUE_MEMBER_TRAIT)
150
151 #if defined(BOOST_ASIO_HAS_VARIADIC_TEMPLATES)
152
153 template <typename Sender, typename Receiver, typename... Args>
154 struct set_value_member<
155 boost::asio::execution::detail::submit_receiver_wrapper<
156 Sender, Receiver>,
157 void(Args...)>
158 {
159 BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
160 BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept =
161 (boost::asio::execution::is_nothrow_receiver_of<Receiver, Args...>::value));
162 typedef void result_type;
163 };
164
165 #else // defined(BOOST_ASIO_HAS_VARIADIC_TEMPLATES)
166
167 template <typename Sender, typename Receiver>
168 struct set_value_member<
169 boost::asio::execution::detail::submit_receiver_wrapper<
170 Sender, Receiver>,
171 void()>
172 {
173 BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
174 BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept =
175 boost::asio::execution::is_nothrow_receiver_of<Receiver>::value);
176 typedef void result_type;
177 };
178
179 #define BOOST_ASIO_PRIVATE_SUBMIT_RECEIVER_TRAIT_DEF(n) \
180 template <typename Sender, typename Receiver, \
181 BOOST_ASIO_VARIADIC_TPARAMS(n)> \
182 struct set_value_member< \
183 boost::asio::execution::detail::submit_receiver_wrapper< \
184 Sender, Receiver>, \
185 void(BOOST_ASIO_VARIADIC_TARGS(n))> \
186 { \
187 BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true); \
188 BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = \
189 (boost::asio::execution::is_nothrow_receiver_of<Receiver, \
190 BOOST_ASIO_VARIADIC_TARGS(n)>::value)); \
191 typedef void result_type; \
192 }; \
193 /**/
194 BOOST_ASIO_VARIADIC_GENERATE(BOOST_ASIO_PRIVATE_SUBMIT_RECEIVER_TRAIT_DEF)
195 #undef BOOST_ASIO_PRIVATE_SUBMIT_RECEIVER_TRAIT_DEF
196
197 #endif // defined(BOOST_ASIO_HAS_VARIADIC_TEMPLATES)
198
199 #endif // !defined(BOOST_ASIO_HAS_DEDUCED_SET_VALUE_MEMBER_TRAIT)
200
201 #if !defined(BOOST_ASIO_HAS_DEDUCED_SET_ERROR_MEMBER_TRAIT)
202
203 template <typename Sender, typename Receiver, typename E>
204 struct set_error_member<
205 boost::asio::execution::detail::submit_receiver_wrapper<
206 Sender, Receiver>, E>
207 {
208 BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
209 BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
210 typedef void result_type;
211 };
212
213 #endif // !defined(BOOST_ASIO_HAS_DEDUCED_SET_ERROR_MEMBER_TRAIT)
214
215 #if !defined(BOOST_ASIO_HAS_DEDUCED_SET_DONE_MEMBER_TRAIT)
216
217 template <typename Sender, typename Receiver>
218 struct set_done_member<
219 boost::asio::execution::detail::submit_receiver_wrapper<
220 Sender, Receiver> >
221 {
222 BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
223 BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
224 typedef void result_type;
225 };
226
227 #endif // !defined(BOOST_ASIO_HAS_DEDUCED_SET_DONE_MEMBER_TRAIT)
228
229 } // namespace traits
230 } // namespace asio
231 } // namespace boost
232
233 #include <boost/asio/detail/pop_options.hpp>
234
235 #endif // BOOST_ASIO_EXECUTION_DETAIL_SUBMIT_RECEIVER_HPP
236