defer.hpp
9.75 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
//
// impl/defer.hpp
// ~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2022 Christopher M. Kohlhoff (chris at kohlhoff dot com)
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#ifndef BOOST_ASIO_IMPL_DEFER_HPP
#define BOOST_ASIO_IMPL_DEFER_HPP
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
#include <boost/asio/detail/config.hpp>
#include <boost/asio/associated_allocator.hpp>
#include <boost/asio/associated_executor.hpp>
#include <boost/asio/detail/work_dispatcher.hpp>
#include <boost/asio/execution/allocator.hpp>
#include <boost/asio/execution/blocking.hpp>
#include <boost/asio/execution/relationship.hpp>
#include <boost/asio/prefer.hpp>
#include <boost/asio/require.hpp>
#include <boost/asio/detail/push_options.hpp>
namespace boost {
namespace asio {
namespace detail {
class initiate_defer
{
public:
template <typename CompletionHandler>
void operator()(BOOST_ASIO_MOVE_ARG(CompletionHandler) handler,
typename enable_if<
execution::is_executor<
typename associated_executor<
typename decay<CompletionHandler>::type
>::type
>::value
>::type* = 0) const
{
typedef typename decay<CompletionHandler>::type handler_t;
typename associated_executor<handler_t>::type ex(
(get_associated_executor)(handler));
typename associated_allocator<handler_t>::type alloc(
(get_associated_allocator)(handler));
#if defined(BOOST_ASIO_NO_DEPRECATED)
boost::asio::prefer(
boost::asio::require(ex, execution::blocking.never),
execution::relationship.continuation,
execution::allocator(alloc)
).execute(
boost::asio::detail::bind_handler(
BOOST_ASIO_MOVE_CAST(CompletionHandler)(handler)));
#else // defined(BOOST_ASIO_NO_DEPRECATED)
execution::execute(
boost::asio::prefer(
boost::asio::require(ex, execution::blocking.never),
execution::relationship.continuation,
execution::allocator(alloc)),
boost::asio::detail::bind_handler(
BOOST_ASIO_MOVE_CAST(CompletionHandler)(handler)));
#endif // defined(BOOST_ASIO_NO_DEPRECATED)
}
template <typename CompletionHandler>
void operator()(BOOST_ASIO_MOVE_ARG(CompletionHandler) handler,
typename enable_if<
!execution::is_executor<
typename associated_executor<
typename decay<CompletionHandler>::type
>::type
>::value
>::type* = 0) const
{
typedef typename decay<CompletionHandler>::type handler_t;
typename associated_executor<handler_t>::type ex(
(get_associated_executor)(handler));
typename associated_allocator<handler_t>::type alloc(
(get_associated_allocator)(handler));
ex.defer(boost::asio::detail::bind_handler(
BOOST_ASIO_MOVE_CAST(CompletionHandler)(handler)), alloc);
}
};
template <typename Executor>
class initiate_defer_with_executor
{
public:
typedef Executor executor_type;
explicit initiate_defer_with_executor(const Executor& ex)
: ex_(ex)
{
}
executor_type get_executor() const BOOST_ASIO_NOEXCEPT
{
return ex_;
}
template <typename CompletionHandler>
void operator()(BOOST_ASIO_MOVE_ARG(CompletionHandler) handler,
typename enable_if<
execution::is_executor<
typename conditional<true, executor_type, CompletionHandler>::type
>::value
>::type* = 0,
typename enable_if<
!detail::is_work_dispatcher_required<
typename decay<CompletionHandler>::type,
Executor
>::value
>::type* = 0) const
{
typedef typename decay<CompletionHandler>::type handler_t;
typename associated_allocator<handler_t>::type alloc(
(get_associated_allocator)(handler));
#if defined(BOOST_ASIO_NO_DEPRECATED)
boost::asio::prefer(
boost::asio::require(ex_, execution::blocking.never),
execution::relationship.continuation,
execution::allocator(alloc)
).execute(
boost::asio::detail::bind_handler(
BOOST_ASIO_MOVE_CAST(CompletionHandler)(handler)));
#else // defined(BOOST_ASIO_NO_DEPRECATED)
execution::execute(
boost::asio::prefer(
boost::asio::require(ex_, execution::blocking.never),
execution::relationship.continuation,
execution::allocator(alloc)),
boost::asio::detail::bind_handler(
BOOST_ASIO_MOVE_CAST(CompletionHandler)(handler)));
#endif // defined(BOOST_ASIO_NO_DEPRECATED)
}
template <typename CompletionHandler>
void operator()(BOOST_ASIO_MOVE_ARG(CompletionHandler) handler,
typename enable_if<
execution::is_executor<
typename conditional<true, executor_type, CompletionHandler>::type
>::value
>::type* = 0,
typename enable_if<
detail::is_work_dispatcher_required<
typename decay<CompletionHandler>::type,
Executor
>::value
>::type* = 0) const
{
typedef typename decay<CompletionHandler>::type handler_t;
typedef typename associated_executor<
handler_t, Executor>::type handler_ex_t;
handler_ex_t handler_ex((get_associated_executor)(handler, ex_));
typename associated_allocator<handler_t>::type alloc(
(get_associated_allocator)(handler));
#if defined(BOOST_ASIO_NO_DEPRECATED)
boost::asio::prefer(
boost::asio::require(ex_, execution::blocking.never),
execution::relationship.continuation,
execution::allocator(alloc)
).execute(
detail::work_dispatcher<handler_t, handler_ex_t>(
BOOST_ASIO_MOVE_CAST(CompletionHandler)(handler), handler_ex));
#else // defined(BOOST_ASIO_NO_DEPRECATED)
execution::execute(
boost::asio::prefer(
boost::asio::require(ex_, execution::blocking.never),
execution::relationship.continuation,
execution::allocator(alloc)),
detail::work_dispatcher<handler_t, handler_ex_t>(
BOOST_ASIO_MOVE_CAST(CompletionHandler)(handler), handler_ex));
#endif // defined(BOOST_ASIO_NO_DEPRECATED)
}
template <typename CompletionHandler>
void operator()(BOOST_ASIO_MOVE_ARG(CompletionHandler) handler,
typename enable_if<
!execution::is_executor<
typename conditional<true, executor_type, CompletionHandler>::type
>::value
>::type* = 0,
typename enable_if<
!detail::is_work_dispatcher_required<
typename decay<CompletionHandler>::type,
Executor
>::value
>::type* = 0) const
{
typedef typename decay<CompletionHandler>::type handler_t;
typename associated_allocator<handler_t>::type alloc(
(get_associated_allocator)(handler));
ex_.defer(boost::asio::detail::bind_handler(
BOOST_ASIO_MOVE_CAST(CompletionHandler)(handler)), alloc);
}
template <typename CompletionHandler>
void operator()(BOOST_ASIO_MOVE_ARG(CompletionHandler) handler,
typename enable_if<
!execution::is_executor<
typename conditional<true, executor_type, CompletionHandler>::type
>::value
>::type* = 0,
typename enable_if<
detail::is_work_dispatcher_required<
typename decay<CompletionHandler>::type,
Executor
>::value
>::type* = 0) const
{
typedef typename decay<CompletionHandler>::type handler_t;
typedef typename associated_executor<
handler_t, Executor>::type handler_ex_t;
handler_ex_t handler_ex((get_associated_executor)(handler, ex_));
typename associated_allocator<handler_t>::type alloc(
(get_associated_allocator)(handler));
ex_.defer(detail::work_dispatcher<handler_t, handler_ex_t>(
BOOST_ASIO_MOVE_CAST(CompletionHandler)(handler),
handler_ex), alloc);
}
private:
Executor ex_;
};
} // namespace detail
template <BOOST_ASIO_COMPLETION_TOKEN_FOR(void()) NullaryToken>
BOOST_ASIO_INITFN_AUTO_RESULT_TYPE_PREFIX(NullaryToken, void()) defer(
BOOST_ASIO_MOVE_ARG(NullaryToken) token)
BOOST_ASIO_INITFN_AUTO_RESULT_TYPE_SUFFIX((
async_initiate<NullaryToken, void()>(
declval<detail::initiate_defer>(), token)))
{
return async_initiate<NullaryToken, void()>(
detail::initiate_defer(), token);
}
template <typename Executor,
BOOST_ASIO_COMPLETION_TOKEN_FOR(void()) NullaryToken>
BOOST_ASIO_INITFN_AUTO_RESULT_TYPE_PREFIX(NullaryToken, void()) defer(
const Executor& ex, BOOST_ASIO_MOVE_ARG(NullaryToken) token,
typename constraint<
(execution::is_executor<Executor>::value
&& can_require<Executor, execution::blocking_t::never_t>::value)
|| is_executor<Executor>::value
>::type)
BOOST_ASIO_INITFN_AUTO_RESULT_TYPE_SUFFIX((
async_initiate<NullaryToken, void()>(
declval<detail::initiate_defer_with_executor<Executor> >(), token)))
{
return async_initiate<NullaryToken, void()>(
detail::initiate_defer_with_executor<Executor>(ex), token);
}
template <typename ExecutionContext,
BOOST_ASIO_COMPLETION_TOKEN_FOR(void()) NullaryToken>
inline BOOST_ASIO_INITFN_AUTO_RESULT_TYPE_PREFIX(NullaryToken, void()) defer(
ExecutionContext& ctx, BOOST_ASIO_MOVE_ARG(NullaryToken) token,
typename constraint<is_convertible<
ExecutionContext&, execution_context&>::value>::type)
BOOST_ASIO_INITFN_AUTO_RESULT_TYPE_SUFFIX((
async_initiate<NullaryToken, void()>(
declval<detail::initiate_defer_with_executor<
typename ExecutionContext::executor_type> >(), token)))
{
return async_initiate<NullaryToken, void()>(
detail::initiate_defer_with_executor<
typename ExecutionContext::executor_type>(
ctx.get_executor()), token);
}
} // namespace asio
} // namespace boost
#include <boost/asio/detail/pop_options.hpp>
#endif // BOOST_ASIO_IMPL_DEFER_HPP