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b32b8144 FG |
1 | // |
2 | // bind_executor.hpp | |
3 | // ~~~~~~~~~~~~~~~~~ | |
4 | // | |
f67539c2 | 5 | // Copyright (c) 2003-2020 Christopher M. Kohlhoff (chris at kohlhoff dot com) |
b32b8144 FG |
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_BIND_EXECUTOR_HPP | |
12 | #define BOOST_ASIO_BIND_EXECUTOR_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/associated_executor.hpp> | |
22 | #include <boost/asio/associated_allocator.hpp> | |
23 | #include <boost/asio/async_result.hpp> | |
20effc67 | 24 | #include <boost/asio/execution/executor.hpp> |
b32b8144 FG |
25 | #include <boost/asio/execution_context.hpp> |
26 | #include <boost/asio/is_executor.hpp> | |
27 | #include <boost/asio/uses_executor.hpp> | |
28 | ||
29 | #include <boost/asio/detail/push_options.hpp> | |
30 | ||
31 | namespace boost { | |
32 | namespace asio { | |
33 | namespace detail { | |
34 | ||
b32b8144 FG |
35 | // Helper to automatically define nested typedef result_type. |
36 | ||
37 | template <typename T, typename = void> | |
38 | struct executor_binder_result_type | |
39 | { | |
40 | protected: | |
41 | typedef void result_type_or_void; | |
42 | }; | |
43 | ||
44 | template <typename T> | |
45 | struct executor_binder_result_type<T, | |
20effc67 | 46 | typename void_type<typename T::result_type>::type> |
b32b8144 FG |
47 | { |
48 | typedef typename T::result_type result_type; | |
49 | protected: | |
50 | typedef result_type result_type_or_void; | |
51 | }; | |
52 | ||
53 | template <typename R> | |
54 | struct executor_binder_result_type<R(*)()> | |
55 | { | |
56 | typedef R result_type; | |
57 | protected: | |
58 | typedef result_type result_type_or_void; | |
59 | }; | |
60 | ||
61 | template <typename R> | |
62 | struct executor_binder_result_type<R(&)()> | |
63 | { | |
64 | typedef R result_type; | |
65 | protected: | |
66 | typedef result_type result_type_or_void; | |
67 | }; | |
68 | ||
69 | template <typename R, typename A1> | |
70 | struct executor_binder_result_type<R(*)(A1)> | |
71 | { | |
72 | typedef R result_type; | |
73 | protected: | |
74 | typedef result_type result_type_or_void; | |
75 | }; | |
76 | ||
77 | template <typename R, typename A1> | |
78 | struct executor_binder_result_type<R(&)(A1)> | |
79 | { | |
80 | typedef R result_type; | |
81 | protected: | |
82 | typedef result_type result_type_or_void; | |
83 | }; | |
84 | ||
85 | template <typename R, typename A1, typename A2> | |
86 | struct executor_binder_result_type<R(*)(A1, A2)> | |
87 | { | |
88 | typedef R result_type; | |
89 | protected: | |
90 | typedef result_type result_type_or_void; | |
91 | }; | |
92 | ||
93 | template <typename R, typename A1, typename A2> | |
94 | struct executor_binder_result_type<R(&)(A1, A2)> | |
95 | { | |
96 | typedef R result_type; | |
97 | protected: | |
98 | typedef result_type result_type_or_void; | |
99 | }; | |
100 | ||
101 | // Helper to automatically define nested typedef argument_type. | |
102 | ||
103 | template <typename T, typename = void> | |
104 | struct executor_binder_argument_type {}; | |
105 | ||
106 | template <typename T> | |
107 | struct executor_binder_argument_type<T, | |
20effc67 | 108 | typename void_type<typename T::argument_type>::type> |
b32b8144 FG |
109 | { |
110 | typedef typename T::argument_type argument_type; | |
111 | }; | |
112 | ||
113 | template <typename R, typename A1> | |
114 | struct executor_binder_argument_type<R(*)(A1)> | |
115 | { | |
116 | typedef A1 argument_type; | |
117 | }; | |
118 | ||
119 | template <typename R, typename A1> | |
120 | struct executor_binder_argument_type<R(&)(A1)> | |
121 | { | |
122 | typedef A1 argument_type; | |
123 | }; | |
124 | ||
125 | // Helper to automatically define nested typedefs first_argument_type and | |
126 | // second_argument_type. | |
127 | ||
128 | template <typename T, typename = void> | |
129 | struct executor_binder_argument_types {}; | |
130 | ||
131 | template <typename T> | |
132 | struct executor_binder_argument_types<T, | |
20effc67 | 133 | typename void_type<typename T::first_argument_type>::type> |
b32b8144 FG |
134 | { |
135 | typedef typename T::first_argument_type first_argument_type; | |
136 | typedef typename T::second_argument_type second_argument_type; | |
137 | }; | |
138 | ||
139 | template <typename R, typename A1, typename A2> | |
140 | struct executor_binder_argument_type<R(*)(A1, A2)> | |
141 | { | |
142 | typedef A1 first_argument_type; | |
143 | typedef A2 second_argument_type; | |
144 | }; | |
145 | ||
146 | template <typename R, typename A1, typename A2> | |
147 | struct executor_binder_argument_type<R(&)(A1, A2)> | |
148 | { | |
149 | typedef A1 first_argument_type; | |
150 | typedef A2 second_argument_type; | |
151 | }; | |
152 | ||
20effc67 TL |
153 | // Helper to perform uses_executor construction of the target type, if |
154 | // required. | |
b32b8144 FG |
155 | |
156 | template <typename T, typename Executor, bool UsesExecutor> | |
157 | class executor_binder_base; | |
158 | ||
159 | template <typename T, typename Executor> | |
160 | class executor_binder_base<T, Executor, true> | |
b32b8144 FG |
161 | { |
162 | protected: | |
163 | template <typename E, typename U> | |
164 | executor_binder_base(BOOST_ASIO_MOVE_ARG(E) e, BOOST_ASIO_MOVE_ARG(U) u) | |
165 | : executor_(BOOST_ASIO_MOVE_CAST(E)(e)), | |
166 | target_(executor_arg_t(), executor_, BOOST_ASIO_MOVE_CAST(U)(u)) | |
167 | { | |
168 | } | |
169 | ||
170 | Executor executor_; | |
171 | T target_; | |
172 | }; | |
173 | ||
174 | template <typename T, typename Executor> | |
175 | class executor_binder_base<T, Executor, false> | |
176 | { | |
177 | protected: | |
178 | template <typename E, typename U> | |
179 | executor_binder_base(BOOST_ASIO_MOVE_ARG(E) e, BOOST_ASIO_MOVE_ARG(U) u) | |
180 | : executor_(BOOST_ASIO_MOVE_CAST(E)(e)), | |
181 | target_(BOOST_ASIO_MOVE_CAST(U)(u)) | |
182 | { | |
183 | } | |
184 | ||
185 | Executor executor_; | |
186 | T target_; | |
187 | }; | |
188 | ||
189 | // Helper to enable SFINAE on zero-argument operator() below. | |
190 | ||
191 | template <typename T, typename = void> | |
192 | struct executor_binder_result_of0 | |
193 | { | |
194 | typedef void type; | |
195 | }; | |
196 | ||
197 | template <typename T> | |
198 | struct executor_binder_result_of0<T, | |
20effc67 | 199 | typename void_type<typename result_of<T()>::type>::type> |
b32b8144 FG |
200 | { |
201 | typedef typename result_of<T()>::type type; | |
202 | }; | |
203 | ||
204 | } // namespace detail | |
205 | ||
206 | /// A call wrapper type to bind an executor of type @c Executor to an object of | |
207 | /// type @c T. | |
208 | template <typename T, typename Executor> | |
209 | class executor_binder | |
210 | #if !defined(GENERATING_DOCUMENTATION) | |
211 | : public detail::executor_binder_result_type<T>, | |
212 | public detail::executor_binder_argument_type<T>, | |
213 | public detail::executor_binder_argument_types<T>, | |
214 | private detail::executor_binder_base< | |
215 | T, Executor, uses_executor<T, Executor>::value> | |
216 | #endif // !defined(GENERATING_DOCUMENTATION) | |
217 | { | |
218 | public: | |
219 | /// The type of the target object. | |
220 | typedef T target_type; | |
221 | ||
222 | /// The type of the associated executor. | |
223 | typedef Executor executor_type; | |
224 | ||
225 | #if defined(GENERATING_DOCUMENTATION) | |
226 | /// The return type if a function. | |
227 | /** | |
228 | * The type of @c result_type is based on the type @c T of the wrapper's | |
229 | * target object: | |
230 | * | |
231 | * @li if @c T is a pointer to function type, @c result_type is a synonym for | |
232 | * the return type of @c T; | |
233 | * | |
234 | * @li if @c T is a class type with a member type @c result_type, then @c | |
235 | * result_type is a synonym for @c T::result_type; | |
236 | * | |
237 | * @li otherwise @c result_type is not defined. | |
238 | */ | |
239 | typedef see_below result_type; | |
240 | ||
241 | /// The type of the function's argument. | |
242 | /** | |
243 | * The type of @c argument_type is based on the type @c T of the wrapper's | |
244 | * target object: | |
245 | * | |
246 | * @li if @c T is a pointer to a function type accepting a single argument, | |
247 | * @c argument_type is a synonym for the return type of @c T; | |
248 | * | |
249 | * @li if @c T is a class type with a member type @c argument_type, then @c | |
250 | * argument_type is a synonym for @c T::argument_type; | |
251 | * | |
252 | * @li otherwise @c argument_type is not defined. | |
253 | */ | |
254 | typedef see_below argument_type; | |
255 | ||
256 | /// The type of the function's first argument. | |
257 | /** | |
258 | * The type of @c first_argument_type is based on the type @c T of the | |
259 | * wrapper's target object: | |
260 | * | |
261 | * @li if @c T is a pointer to a function type accepting two arguments, @c | |
262 | * first_argument_type is a synonym for the return type of @c T; | |
263 | * | |
264 | * @li if @c T is a class type with a member type @c first_argument_type, | |
265 | * then @c first_argument_type is a synonym for @c T::first_argument_type; | |
266 | * | |
267 | * @li otherwise @c first_argument_type is not defined. | |
268 | */ | |
269 | typedef see_below first_argument_type; | |
270 | ||
271 | /// The type of the function's second argument. | |
272 | /** | |
273 | * The type of @c second_argument_type is based on the type @c T of the | |
274 | * wrapper's target object: | |
275 | * | |
276 | * @li if @c T is a pointer to a function type accepting two arguments, @c | |
277 | * second_argument_type is a synonym for the return type of @c T; | |
278 | * | |
279 | * @li if @c T is a class type with a member type @c first_argument_type, | |
280 | * then @c second_argument_type is a synonym for @c T::second_argument_type; | |
281 | * | |
282 | * @li otherwise @c second_argument_type is not defined. | |
283 | */ | |
284 | typedef see_below second_argument_type; | |
285 | #endif // defined(GENERATING_DOCUMENTATION) | |
286 | ||
287 | /// Construct an executor wrapper for the specified object. | |
288 | /** | |
289 | * This constructor is only valid if the type @c T is constructible from type | |
290 | * @c U. | |
291 | */ | |
292 | template <typename U> | |
293 | executor_binder(executor_arg_t, const executor_type& e, | |
294 | BOOST_ASIO_MOVE_ARG(U) u) | |
295 | : base_type(e, BOOST_ASIO_MOVE_CAST(U)(u)) | |
296 | { | |
297 | } | |
298 | ||
299 | /// Copy constructor. | |
300 | executor_binder(const executor_binder& other) | |
301 | : base_type(other.get_executor(), other.get()) | |
302 | { | |
303 | } | |
304 | ||
305 | /// Construct a copy, but specify a different executor. | |
306 | executor_binder(executor_arg_t, const executor_type& e, | |
307 | const executor_binder& other) | |
308 | : base_type(e, other.get()) | |
309 | { | |
310 | } | |
311 | ||
312 | /// Construct a copy of a different executor wrapper type. | |
313 | /** | |
314 | * This constructor is only valid if the @c Executor type is constructible | |
315 | * from type @c OtherExecutor, and the type @c T is constructible from type | |
316 | * @c U. | |
317 | */ | |
318 | template <typename U, typename OtherExecutor> | |
319 | executor_binder(const executor_binder<U, OtherExecutor>& other) | |
320 | : base_type(other.get_executor(), other.get()) | |
321 | { | |
322 | } | |
323 | ||
324 | /// Construct a copy of a different executor wrapper type, but specify a | |
325 | /// different executor. | |
326 | /** | |
327 | * This constructor is only valid if the type @c T is constructible from type | |
328 | * @c U. | |
329 | */ | |
330 | template <typename U, typename OtherExecutor> | |
331 | executor_binder(executor_arg_t, const executor_type& e, | |
332 | const executor_binder<U, OtherExecutor>& other) | |
333 | : base_type(e, other.get()) | |
334 | { | |
335 | } | |
336 | ||
337 | #if defined(BOOST_ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION) | |
338 | ||
339 | /// Move constructor. | |
340 | executor_binder(executor_binder&& other) | |
341 | : base_type(BOOST_ASIO_MOVE_CAST(executor_type)(other.get_executor()), | |
342 | BOOST_ASIO_MOVE_CAST(T)(other.get())) | |
343 | { | |
344 | } | |
345 | ||
346 | /// Move construct the target object, but specify a different executor. | |
347 | executor_binder(executor_arg_t, const executor_type& e, | |
348 | executor_binder&& other) | |
349 | : base_type(e, BOOST_ASIO_MOVE_CAST(T)(other.get())) | |
350 | { | |
351 | } | |
352 | ||
353 | /// Move construct from a different executor wrapper type. | |
354 | template <typename U, typename OtherExecutor> | |
355 | executor_binder(executor_binder<U, OtherExecutor>&& other) | |
356 | : base_type(BOOST_ASIO_MOVE_CAST(OtherExecutor)(other.get_executor()), | |
357 | BOOST_ASIO_MOVE_CAST(U)(other.get())) | |
358 | { | |
359 | } | |
360 | ||
361 | /// Move construct from a different executor wrapper type, but specify a | |
362 | /// different executor. | |
363 | template <typename U, typename OtherExecutor> | |
364 | executor_binder(executor_arg_t, const executor_type& e, | |
365 | executor_binder<U, OtherExecutor>&& other) | |
366 | : base_type(e, BOOST_ASIO_MOVE_CAST(U)(other.get())) | |
367 | { | |
368 | } | |
369 | ||
370 | #endif // defined(BOOST_ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION) | |
371 | ||
372 | /// Destructor. | |
373 | ~executor_binder() | |
374 | { | |
375 | } | |
376 | ||
377 | /// Obtain a reference to the target object. | |
378 | target_type& get() BOOST_ASIO_NOEXCEPT | |
379 | { | |
380 | return this->target_; | |
381 | } | |
382 | ||
383 | /// Obtain a reference to the target object. | |
384 | const target_type& get() const BOOST_ASIO_NOEXCEPT | |
385 | { | |
386 | return this->target_; | |
387 | } | |
388 | ||
389 | /// Obtain the associated executor. | |
390 | executor_type get_executor() const BOOST_ASIO_NOEXCEPT | |
391 | { | |
392 | return this->executor_; | |
393 | } | |
394 | ||
395 | #if defined(GENERATING_DOCUMENTATION) | |
396 | ||
397 | template <typename... Args> auto operator()(Args&& ...); | |
398 | template <typename... Args> auto operator()(Args&& ...) const; | |
399 | ||
400 | #elif defined(BOOST_ASIO_HAS_VARIADIC_TEMPLATES) | |
401 | ||
402 | /// Forwarding function call operator. | |
403 | template <typename... Args> | |
404 | typename result_of<T(Args...)>::type operator()( | |
405 | BOOST_ASIO_MOVE_ARG(Args)... args) | |
406 | { | |
407 | return this->target_(BOOST_ASIO_MOVE_CAST(Args)(args)...); | |
408 | } | |
409 | ||
410 | /// Forwarding function call operator. | |
411 | template <typename... Args> | |
412 | typename result_of<T(Args...)>::type operator()( | |
413 | BOOST_ASIO_MOVE_ARG(Args)... args) const | |
414 | { | |
415 | return this->target_(BOOST_ASIO_MOVE_CAST(Args)(args)...); | |
416 | } | |
417 | ||
418 | #elif defined(BOOST_ASIO_HAS_STD_TYPE_TRAITS) && !defined(_MSC_VER) | |
419 | ||
420 | typename detail::executor_binder_result_of0<T>::type operator()() | |
421 | { | |
422 | return this->target_(); | |
423 | } | |
424 | ||
425 | typename detail::executor_binder_result_of0<T>::type operator()() const | |
426 | { | |
427 | return this->target_(); | |
428 | } | |
429 | ||
430 | #define BOOST_ASIO_PRIVATE_BIND_EXECUTOR_CALL_DEF(n) \ | |
431 | template <BOOST_ASIO_VARIADIC_TPARAMS(n)> \ | |
432 | typename result_of<T(BOOST_ASIO_VARIADIC_TARGS(n))>::type operator()( \ | |
433 | BOOST_ASIO_VARIADIC_MOVE_PARAMS(n)) \ | |
434 | { \ | |
435 | return this->target_(BOOST_ASIO_VARIADIC_MOVE_ARGS(n)); \ | |
436 | } \ | |
437 | \ | |
438 | template <BOOST_ASIO_VARIADIC_TPARAMS(n)> \ | |
439 | typename result_of<T(BOOST_ASIO_VARIADIC_TARGS(n))>::type operator()( \ | |
440 | BOOST_ASIO_VARIADIC_MOVE_PARAMS(n)) const \ | |
441 | { \ | |
442 | return this->target_(BOOST_ASIO_VARIADIC_MOVE_ARGS(n)); \ | |
443 | } \ | |
444 | /**/ | |
445 | BOOST_ASIO_VARIADIC_GENERATE(BOOST_ASIO_PRIVATE_BIND_EXECUTOR_CALL_DEF) | |
446 | #undef BOOST_ASIO_PRIVATE_BIND_EXECUTOR_CALL_DEF | |
447 | ||
448 | #else // defined(BOOST_ASIO_HAS_STD_TYPE_TRAITS) && !defined(_MSC_VER) | |
449 | ||
450 | typedef typename detail::executor_binder_result_type<T>::result_type_or_void | |
451 | result_type_or_void; | |
452 | ||
453 | result_type_or_void operator()() | |
454 | { | |
455 | return this->target_(); | |
456 | } | |
457 | ||
458 | result_type_or_void operator()() const | |
459 | { | |
460 | return this->target_(); | |
461 | } | |
462 | ||
463 | #define BOOST_ASIO_PRIVATE_BIND_EXECUTOR_CALL_DEF(n) \ | |
464 | template <BOOST_ASIO_VARIADIC_TPARAMS(n)> \ | |
465 | result_type_or_void operator()( \ | |
466 | BOOST_ASIO_VARIADIC_MOVE_PARAMS(n)) \ | |
467 | { \ | |
468 | return this->target_(BOOST_ASIO_VARIADIC_MOVE_ARGS(n)); \ | |
469 | } \ | |
470 | \ | |
471 | template <BOOST_ASIO_VARIADIC_TPARAMS(n)> \ | |
472 | result_type_or_void operator()( \ | |
473 | BOOST_ASIO_VARIADIC_MOVE_PARAMS(n)) const \ | |
474 | { \ | |
475 | return this->target_(BOOST_ASIO_VARIADIC_MOVE_ARGS(n)); \ | |
476 | } \ | |
477 | /**/ | |
478 | BOOST_ASIO_VARIADIC_GENERATE(BOOST_ASIO_PRIVATE_BIND_EXECUTOR_CALL_DEF) | |
479 | #undef BOOST_ASIO_PRIVATE_BIND_EXECUTOR_CALL_DEF | |
480 | ||
481 | #endif // defined(BOOST_ASIO_HAS_STD_TYPE_TRAITS) && !defined(_MSC_VER) | |
482 | ||
483 | private: | |
484 | typedef detail::executor_binder_base<T, Executor, | |
485 | uses_executor<T, Executor>::value> base_type; | |
486 | }; | |
487 | ||
488 | /// Associate an object of type @c T with an executor of type @c Executor. | |
489 | template <typename Executor, typename T> | |
490 | inline executor_binder<typename decay<T>::type, Executor> | |
491 | bind_executor(const Executor& ex, BOOST_ASIO_MOVE_ARG(T) t, | |
20effc67 TL |
492 | typename enable_if< |
493 | is_executor<Executor>::value || execution::is_executor<Executor>::value | |
494 | >::type* = 0) | |
b32b8144 FG |
495 | { |
496 | return executor_binder<typename decay<T>::type, Executor>( | |
497 | executor_arg_t(), ex, BOOST_ASIO_MOVE_CAST(T)(t)); | |
498 | } | |
499 | ||
500 | /// Associate an object of type @c T with an execution context's executor. | |
501 | template <typename ExecutionContext, typename T> | |
502 | inline executor_binder<typename decay<T>::type, | |
503 | typename ExecutionContext::executor_type> | |
504 | bind_executor(ExecutionContext& ctx, BOOST_ASIO_MOVE_ARG(T) t, | |
505 | typename enable_if<is_convertible< | |
506 | ExecutionContext&, execution_context&>::value>::type* = 0) | |
507 | { | |
508 | return executor_binder<typename decay<T>::type, | |
509 | typename ExecutionContext::executor_type>( | |
510 | executor_arg_t(), ctx.get_executor(), BOOST_ASIO_MOVE_CAST(T)(t)); | |
511 | } | |
512 | ||
513 | #if !defined(GENERATING_DOCUMENTATION) | |
514 | ||
515 | template <typename T, typename Executor> | |
516 | struct uses_executor<executor_binder<T, Executor>, Executor> | |
517 | : true_type {}; | |
518 | ||
519 | template <typename T, typename Executor, typename Signature> | |
520 | class async_result<executor_binder<T, Executor>, Signature> | |
521 | { | |
522 | public: | |
523 | typedef executor_binder< | |
524 | typename async_result<T, Signature>::completion_handler_type, Executor> | |
525 | completion_handler_type; | |
526 | ||
527 | typedef typename async_result<T, Signature>::return_type return_type; | |
528 | ||
529 | explicit async_result(executor_binder<T, Executor>& b) | |
530 | : target_(b.get()) | |
531 | { | |
532 | } | |
533 | ||
534 | return_type get() | |
535 | { | |
536 | return target_.get(); | |
537 | } | |
538 | ||
539 | private: | |
540 | async_result(const async_result&) BOOST_ASIO_DELETED; | |
541 | async_result& operator=(const async_result&) BOOST_ASIO_DELETED; | |
542 | ||
543 | async_result<T, Signature> target_; | |
544 | }; | |
545 | ||
b32b8144 FG |
546 | template <typename T, typename Executor, typename Allocator> |
547 | struct associated_allocator<executor_binder<T, Executor>, Allocator> | |
548 | { | |
549 | typedef typename associated_allocator<T, Allocator>::type type; | |
550 | ||
551 | static type get(const executor_binder<T, Executor>& b, | |
552 | const Allocator& a = Allocator()) BOOST_ASIO_NOEXCEPT | |
553 | { | |
554 | return associated_allocator<T, Allocator>::get(b.get(), a); | |
555 | } | |
556 | }; | |
557 | ||
558 | template <typename T, typename Executor, typename Executor1> | |
559 | struct associated_executor<executor_binder<T, Executor>, Executor1> | |
560 | { | |
561 | typedef Executor type; | |
562 | ||
563 | static type get(const executor_binder<T, Executor>& b, | |
564 | const Executor1& = Executor1()) BOOST_ASIO_NOEXCEPT | |
565 | { | |
566 | return b.get_executor(); | |
567 | } | |
568 | }; | |
569 | ||
570 | #endif // !defined(GENERATING_DOCUMENTATION) | |
571 | ||
572 | } // namespace asio | |
573 | } // namespace boost | |
574 | ||
575 | #include <boost/asio/detail/pop_options.hpp> | |
576 | ||
577 | #endif // BOOST_ASIO_BIND_EXECUTOR_HPP |