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1 | // |
2 | // detail/win_iocp_socket_service_base.hpp | |
3 | // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
4 | // | |
5 | // Copyright (c) 2003-2016 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_DETAIL_WIN_IOCP_SOCKET_SERVICE_BASE_HPP | |
12 | #define BOOST_ASIO_DETAIL_WIN_IOCP_SOCKET_SERVICE_BASE_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 | ||
20 | #if defined(BOOST_ASIO_HAS_IOCP) | |
21 | ||
22 | #include <boost/asio/error.hpp> | |
23 | #include <boost/asio/io_service.hpp> | |
24 | #include <boost/asio/socket_base.hpp> | |
25 | #include <boost/asio/detail/addressof.hpp> | |
26 | #include <boost/asio/detail/bind_handler.hpp> | |
27 | #include <boost/asio/detail/buffer_sequence_adapter.hpp> | |
28 | #include <boost/asio/detail/fenced_block.hpp> | |
29 | #include <boost/asio/detail/handler_alloc_helpers.hpp> | |
30 | #include <boost/asio/detail/handler_invoke_helpers.hpp> | |
31 | #include <boost/asio/detail/mutex.hpp> | |
32 | #include <boost/asio/detail/operation.hpp> | |
33 | #include <boost/asio/detail/reactor.hpp> | |
34 | #include <boost/asio/detail/reactor_op.hpp> | |
35 | #include <boost/asio/detail/socket_holder.hpp> | |
36 | #include <boost/asio/detail/socket_ops.hpp> | |
37 | #include <boost/asio/detail/socket_types.hpp> | |
38 | #include <boost/asio/detail/win_iocp_io_service.hpp> | |
39 | #include <boost/asio/detail/win_iocp_null_buffers_op.hpp> | |
40 | #include <boost/asio/detail/win_iocp_socket_connect_op.hpp> | |
41 | #include <boost/asio/detail/win_iocp_socket_send_op.hpp> | |
42 | #include <boost/asio/detail/win_iocp_socket_recv_op.hpp> | |
43 | #include <boost/asio/detail/win_iocp_socket_recvmsg_op.hpp> | |
44 | ||
45 | #include <boost/asio/detail/push_options.hpp> | |
46 | ||
47 | namespace boost { | |
48 | namespace asio { | |
49 | namespace detail { | |
50 | ||
51 | class win_iocp_socket_service_base | |
52 | { | |
53 | public: | |
54 | // The implementation type of the socket. | |
55 | struct base_implementation_type | |
56 | { | |
57 | // The native socket representation. | |
58 | socket_type socket_; | |
59 | ||
60 | // The current state of the socket. | |
61 | socket_ops::state_type state_; | |
62 | ||
63 | // We use a shared pointer as a cancellation token here to work around the | |
64 | // broken Windows support for cancellation. MSDN says that when you call | |
65 | // closesocket any outstanding WSARecv or WSASend operations will complete | |
66 | // with the error ERROR_OPERATION_ABORTED. In practice they complete with | |
67 | // ERROR_NETNAME_DELETED, which means you can't tell the difference between | |
68 | // a local cancellation and the socket being hard-closed by the peer. | |
69 | socket_ops::shared_cancel_token_type cancel_token_; | |
70 | ||
71 | // Per-descriptor data used by the reactor. | |
72 | reactor::per_descriptor_data reactor_data_; | |
73 | ||
74 | #if defined(BOOST_ASIO_ENABLE_CANCELIO) | |
75 | // The ID of the thread from which it is safe to cancel asynchronous | |
76 | // operations. 0 means no asynchronous operations have been started yet. | |
77 | // ~0 means asynchronous operations have been started from more than one | |
78 | // thread, and cancellation is not supported for the socket. | |
79 | DWORD safe_cancellation_thread_id_; | |
80 | #endif // defined(BOOST_ASIO_ENABLE_CANCELIO) | |
81 | ||
82 | // Pointers to adjacent socket implementations in linked list. | |
83 | base_implementation_type* next_; | |
84 | base_implementation_type* prev_; | |
85 | }; | |
86 | ||
87 | // Constructor. | |
88 | BOOST_ASIO_DECL win_iocp_socket_service_base( | |
89 | boost::asio::io_service& io_service); | |
90 | ||
91 | // Destroy all user-defined handler objects owned by the service. | |
92 | BOOST_ASIO_DECL void shutdown_service(); | |
93 | ||
94 | // Construct a new socket implementation. | |
95 | BOOST_ASIO_DECL void construct(base_implementation_type& impl); | |
96 | ||
97 | // Move-construct a new socket implementation. | |
98 | BOOST_ASIO_DECL void base_move_construct(base_implementation_type& impl, | |
99 | base_implementation_type& other_impl); | |
100 | ||
101 | // Move-assign from another socket implementation. | |
102 | BOOST_ASIO_DECL void base_move_assign(base_implementation_type& impl, | |
103 | win_iocp_socket_service_base& other_service, | |
104 | base_implementation_type& other_impl); | |
105 | ||
106 | // Destroy a socket implementation. | |
107 | BOOST_ASIO_DECL void destroy(base_implementation_type& impl); | |
108 | ||
109 | // Determine whether the socket is open. | |
110 | bool is_open(const base_implementation_type& impl) const | |
111 | { | |
112 | return impl.socket_ != invalid_socket; | |
113 | } | |
114 | ||
115 | // Destroy a socket implementation. | |
116 | BOOST_ASIO_DECL boost::system::error_code close( | |
117 | base_implementation_type& impl, boost::system::error_code& ec); | |
118 | ||
119 | // Cancel all operations associated with the socket. | |
120 | BOOST_ASIO_DECL boost::system::error_code cancel( | |
121 | base_implementation_type& impl, boost::system::error_code& ec); | |
122 | ||
123 | // Determine whether the socket is at the out-of-band data mark. | |
124 | bool at_mark(const base_implementation_type& impl, | |
125 | boost::system::error_code& ec) const | |
126 | { | |
127 | return socket_ops::sockatmark(impl.socket_, ec); | |
128 | } | |
129 | ||
130 | // Determine the number of bytes available for reading. | |
131 | std::size_t available(const base_implementation_type& impl, | |
132 | boost::system::error_code& ec) const | |
133 | { | |
134 | return socket_ops::available(impl.socket_, ec); | |
135 | } | |
136 | ||
137 | // Place the socket into the state where it will listen for new connections. | |
138 | boost::system::error_code listen(base_implementation_type& impl, | |
139 | int backlog, boost::system::error_code& ec) | |
140 | { | |
141 | socket_ops::listen(impl.socket_, backlog, ec); | |
142 | return ec; | |
143 | } | |
144 | ||
145 | // Perform an IO control command on the socket. | |
146 | template <typename IO_Control_Command> | |
147 | boost::system::error_code io_control(base_implementation_type& impl, | |
148 | IO_Control_Command& command, boost::system::error_code& ec) | |
149 | { | |
150 | socket_ops::ioctl(impl.socket_, impl.state_, command.name(), | |
151 | static_cast<ioctl_arg_type*>(command.data()), ec); | |
152 | return ec; | |
153 | } | |
154 | ||
155 | // Gets the non-blocking mode of the socket. | |
156 | bool non_blocking(const base_implementation_type& impl) const | |
157 | { | |
158 | return (impl.state_ & socket_ops::user_set_non_blocking) != 0; | |
159 | } | |
160 | ||
161 | // Sets the non-blocking mode of the socket. | |
162 | boost::system::error_code non_blocking(base_implementation_type& impl, | |
163 | bool mode, boost::system::error_code& ec) | |
164 | { | |
165 | socket_ops::set_user_non_blocking(impl.socket_, impl.state_, mode, ec); | |
166 | return ec; | |
167 | } | |
168 | ||
169 | // Gets the non-blocking mode of the native socket implementation. | |
170 | bool native_non_blocking(const base_implementation_type& impl) const | |
171 | { | |
172 | return (impl.state_ & socket_ops::internal_non_blocking) != 0; | |
173 | } | |
174 | ||
175 | // Sets the non-blocking mode of the native socket implementation. | |
176 | boost::system::error_code native_non_blocking(base_implementation_type& impl, | |
177 | bool mode, boost::system::error_code& ec) | |
178 | { | |
179 | socket_ops::set_internal_non_blocking(impl.socket_, impl.state_, mode, ec); | |
180 | return ec; | |
181 | } | |
182 | ||
183 | // Disable sends or receives on the socket. | |
184 | boost::system::error_code shutdown(base_implementation_type& impl, | |
185 | socket_base::shutdown_type what, boost::system::error_code& ec) | |
186 | { | |
187 | socket_ops::shutdown(impl.socket_, what, ec); | |
188 | return ec; | |
189 | } | |
190 | ||
191 | // Send the given data to the peer. Returns the number of bytes sent. | |
192 | template <typename ConstBufferSequence> | |
193 | size_t send(base_implementation_type& impl, | |
194 | const ConstBufferSequence& buffers, | |
195 | socket_base::message_flags flags, boost::system::error_code& ec) | |
196 | { | |
197 | buffer_sequence_adapter<boost::asio::const_buffer, | |
198 | ConstBufferSequence> bufs(buffers); | |
199 | ||
200 | return socket_ops::sync_send(impl.socket_, impl.state_, | |
201 | bufs.buffers(), bufs.count(), flags, bufs.all_empty(), ec); | |
202 | } | |
203 | ||
204 | // Wait until data can be sent without blocking. | |
205 | size_t send(base_implementation_type& impl, const null_buffers&, | |
206 | socket_base::message_flags, boost::system::error_code& ec) | |
207 | { | |
208 | // Wait for socket to become ready. | |
209 | socket_ops::poll_write(impl.socket_, impl.state_, ec); | |
210 | ||
211 | return 0; | |
212 | } | |
213 | ||
214 | // Start an asynchronous send. The data being sent must be valid for the | |
215 | // lifetime of the asynchronous operation. | |
216 | template <typename ConstBufferSequence, typename Handler> | |
217 | void async_send(base_implementation_type& impl, | |
218 | const ConstBufferSequence& buffers, | |
219 | socket_base::message_flags flags, Handler& handler) | |
220 | { | |
221 | // Allocate and construct an operation to wrap the handler. | |
222 | typedef win_iocp_socket_send_op<ConstBufferSequence, Handler> op; | |
223 | typename op::ptr p = { boost::asio::detail::addressof(handler), | |
224 | boost_asio_handler_alloc_helpers::allocate( | |
225 | sizeof(op), handler), 0 }; | |
226 | p.p = new (p.v) op(impl.cancel_token_, buffers, handler); | |
227 | ||
228 | BOOST_ASIO_HANDLER_CREATION((p.p, "socket", &impl, "async_send")); | |
229 | ||
230 | buffer_sequence_adapter<boost::asio::const_buffer, | |
231 | ConstBufferSequence> bufs(buffers); | |
232 | ||
233 | start_send_op(impl, bufs.buffers(), bufs.count(), flags, | |
234 | (impl.state_ & socket_ops::stream_oriented) != 0 && bufs.all_empty(), | |
235 | p.p); | |
236 | p.v = p.p = 0; | |
237 | } | |
238 | ||
239 | // Start an asynchronous wait until data can be sent without blocking. | |
240 | template <typename Handler> | |
241 | void async_send(base_implementation_type& impl, const null_buffers&, | |
242 | socket_base::message_flags, Handler& handler) | |
243 | { | |
244 | // Allocate and construct an operation to wrap the handler. | |
245 | typedef win_iocp_null_buffers_op<Handler> op; | |
246 | typename op::ptr p = { boost::asio::detail::addressof(handler), | |
247 | boost_asio_handler_alloc_helpers::allocate( | |
248 | sizeof(op), handler), 0 }; | |
249 | p.p = new (p.v) op(impl.cancel_token_, handler); | |
250 | ||
251 | BOOST_ASIO_HANDLER_CREATION((p.p, "socket", | |
252 | &impl, "async_send(null_buffers)")); | |
253 | ||
254 | start_reactor_op(impl, reactor::write_op, p.p); | |
255 | p.v = p.p = 0; | |
256 | } | |
257 | ||
258 | // Receive some data from the peer. Returns the number of bytes received. | |
259 | template <typename MutableBufferSequence> | |
260 | size_t receive(base_implementation_type& impl, | |
261 | const MutableBufferSequence& buffers, | |
262 | socket_base::message_flags flags, boost::system::error_code& ec) | |
263 | { | |
264 | buffer_sequence_adapter<boost::asio::mutable_buffer, | |
265 | MutableBufferSequence> bufs(buffers); | |
266 | ||
267 | return socket_ops::sync_recv(impl.socket_, impl.state_, | |
268 | bufs.buffers(), bufs.count(), flags, bufs.all_empty(), ec); | |
269 | } | |
270 | ||
271 | // Wait until data can be received without blocking. | |
272 | size_t receive(base_implementation_type& impl, const null_buffers&, | |
273 | socket_base::message_flags, boost::system::error_code& ec) | |
274 | { | |
275 | // Wait for socket to become ready. | |
276 | socket_ops::poll_read(impl.socket_, impl.state_, ec); | |
277 | ||
278 | return 0; | |
279 | } | |
280 | ||
281 | // Start an asynchronous receive. The buffer for the data being received | |
282 | // must be valid for the lifetime of the asynchronous operation. | |
283 | template <typename MutableBufferSequence, typename Handler> | |
284 | void async_receive(base_implementation_type& impl, | |
285 | const MutableBufferSequence& buffers, | |
286 | socket_base::message_flags flags, Handler& handler) | |
287 | { | |
288 | // Allocate and construct an operation to wrap the handler. | |
289 | typedef win_iocp_socket_recv_op<MutableBufferSequence, Handler> op; | |
290 | typename op::ptr p = { boost::asio::detail::addressof(handler), | |
291 | boost_asio_handler_alloc_helpers::allocate( | |
292 | sizeof(op), handler), 0 }; | |
293 | p.p = new (p.v) op(impl.state_, impl.cancel_token_, buffers, handler); | |
294 | ||
295 | BOOST_ASIO_HANDLER_CREATION((p.p, "socket", &impl, "async_receive")); | |
296 | ||
297 | buffer_sequence_adapter<boost::asio::mutable_buffer, | |
298 | MutableBufferSequence> bufs(buffers); | |
299 | ||
300 | start_receive_op(impl, bufs.buffers(), bufs.count(), flags, | |
301 | (impl.state_ & socket_ops::stream_oriented) != 0 && bufs.all_empty(), | |
302 | p.p); | |
303 | p.v = p.p = 0; | |
304 | } | |
305 | ||
306 | // Wait until data can be received without blocking. | |
307 | template <typename Handler> | |
308 | void async_receive(base_implementation_type& impl, const null_buffers&, | |
309 | socket_base::message_flags flags, Handler& handler) | |
310 | { | |
311 | // Allocate and construct an operation to wrap the handler. | |
312 | typedef win_iocp_null_buffers_op<Handler> op; | |
313 | typename op::ptr p = { boost::asio::detail::addressof(handler), | |
314 | boost_asio_handler_alloc_helpers::allocate( | |
315 | sizeof(op), handler), 0 }; | |
316 | p.p = new (p.v) op(impl.cancel_token_, handler); | |
317 | ||
318 | BOOST_ASIO_HANDLER_CREATION((p.p, "socket", | |
319 | &impl, "async_receive(null_buffers)")); | |
320 | ||
321 | start_null_buffers_receive_op(impl, flags, p.p); | |
322 | p.v = p.p = 0; | |
323 | } | |
324 | ||
325 | // Receive some data with associated flags. Returns the number of bytes | |
326 | // received. | |
327 | template <typename MutableBufferSequence> | |
328 | size_t receive_with_flags(base_implementation_type& impl, | |
329 | const MutableBufferSequence& buffers, | |
330 | socket_base::message_flags in_flags, | |
331 | socket_base::message_flags& out_flags, boost::system::error_code& ec) | |
332 | { | |
333 | buffer_sequence_adapter<boost::asio::mutable_buffer, | |
334 | MutableBufferSequence> bufs(buffers); | |
335 | ||
336 | return socket_ops::sync_recvmsg(impl.socket_, impl.state_, | |
337 | bufs.buffers(), bufs.count(), in_flags, out_flags, ec); | |
338 | } | |
339 | ||
340 | // Wait until data can be received without blocking. | |
341 | size_t receive_with_flags(base_implementation_type& impl, | |
342 | const null_buffers&, socket_base::message_flags, | |
343 | socket_base::message_flags& out_flags, boost::system::error_code& ec) | |
344 | { | |
345 | // Wait for socket to become ready. | |
346 | socket_ops::poll_read(impl.socket_, impl.state_, ec); | |
347 | ||
348 | // Clear out_flags, since we cannot give it any other sensible value when | |
349 | // performing a null_buffers operation. | |
350 | out_flags = 0; | |
351 | ||
352 | return 0; | |
353 | } | |
354 | ||
355 | // Start an asynchronous receive. The buffer for the data being received | |
356 | // must be valid for the lifetime of the asynchronous operation. | |
357 | template <typename MutableBufferSequence, typename Handler> | |
358 | void async_receive_with_flags(base_implementation_type& impl, | |
359 | const MutableBufferSequence& buffers, socket_base::message_flags in_flags, | |
360 | socket_base::message_flags& out_flags, Handler& handler) | |
361 | { | |
362 | // Allocate and construct an operation to wrap the handler. | |
363 | typedef win_iocp_socket_recvmsg_op<MutableBufferSequence, Handler> op; | |
364 | typename op::ptr p = { boost::asio::detail::addressof(handler), | |
365 | boost_asio_handler_alloc_helpers::allocate( | |
366 | sizeof(op), handler), 0 }; | |
367 | p.p = new (p.v) op(impl.cancel_token_, buffers, out_flags, handler); | |
368 | ||
369 | BOOST_ASIO_HANDLER_CREATION((p.p, "socket", | |
370 | &impl, "async_receive_with_flags")); | |
371 | ||
372 | buffer_sequence_adapter<boost::asio::mutable_buffer, | |
373 | MutableBufferSequence> bufs(buffers); | |
374 | ||
375 | start_receive_op(impl, bufs.buffers(), bufs.count(), in_flags, false, p.p); | |
376 | p.v = p.p = 0; | |
377 | } | |
378 | ||
379 | // Wait until data can be received without blocking. | |
380 | template <typename Handler> | |
381 | void async_receive_with_flags(base_implementation_type& impl, | |
382 | const null_buffers&, socket_base::message_flags in_flags, | |
383 | socket_base::message_flags& out_flags, Handler& handler) | |
384 | { | |
385 | // Allocate and construct an operation to wrap the handler. | |
386 | typedef win_iocp_null_buffers_op<Handler> op; | |
387 | typename op::ptr p = { boost::asio::detail::addressof(handler), | |
388 | boost_asio_handler_alloc_helpers::allocate( | |
389 | sizeof(op), handler), 0 }; | |
390 | p.p = new (p.v) op(impl.cancel_token_, handler); | |
391 | ||
392 | BOOST_ASIO_HANDLER_CREATION((p.p, "socket", &impl, | |
393 | "async_receive_with_flags(null_buffers)")); | |
394 | ||
395 | // Reset out_flags since it can be given no sensible value at this time. | |
396 | out_flags = 0; | |
397 | ||
398 | start_null_buffers_receive_op(impl, in_flags, p.p); | |
399 | p.v = p.p = 0; | |
400 | } | |
401 | ||
402 | // Helper function to restart an asynchronous accept operation. | |
403 | BOOST_ASIO_DECL void restart_accept_op(socket_type s, | |
404 | socket_holder& new_socket, int family, int type, int protocol, | |
405 | void* output_buffer, DWORD address_length, operation* op); | |
406 | ||
407 | protected: | |
408 | // Open a new socket implementation. | |
409 | BOOST_ASIO_DECL boost::system::error_code do_open( | |
410 | base_implementation_type& impl, int family, int type, | |
411 | int protocol, boost::system::error_code& ec); | |
412 | ||
413 | // Assign a native socket to a socket implementation. | |
414 | BOOST_ASIO_DECL boost::system::error_code do_assign( | |
415 | base_implementation_type& impl, int type, | |
416 | socket_type native_socket, boost::system::error_code& ec); | |
417 | ||
418 | // Helper function to start an asynchronous send operation. | |
419 | BOOST_ASIO_DECL void start_send_op(base_implementation_type& impl, | |
420 | WSABUF* buffers, std::size_t buffer_count, | |
421 | socket_base::message_flags flags, bool noop, operation* op); | |
422 | ||
423 | // Helper function to start an asynchronous send_to operation. | |
424 | BOOST_ASIO_DECL void start_send_to_op(base_implementation_type& impl, | |
425 | WSABUF* buffers, std::size_t buffer_count, | |
426 | const socket_addr_type* addr, int addrlen, | |
427 | socket_base::message_flags flags, operation* op); | |
428 | ||
429 | // Helper function to start an asynchronous receive operation. | |
430 | BOOST_ASIO_DECL void start_receive_op(base_implementation_type& impl, | |
431 | WSABUF* buffers, std::size_t buffer_count, | |
432 | socket_base::message_flags flags, bool noop, operation* op); | |
433 | ||
434 | // Helper function to start an asynchronous null_buffers receive operation. | |
435 | BOOST_ASIO_DECL void start_null_buffers_receive_op( | |
436 | base_implementation_type& impl, | |
437 | socket_base::message_flags flags, reactor_op* op); | |
438 | ||
439 | // Helper function to start an asynchronous receive_from operation. | |
440 | BOOST_ASIO_DECL void start_receive_from_op(base_implementation_type& impl, | |
441 | WSABUF* buffers, std::size_t buffer_count, socket_addr_type* addr, | |
442 | socket_base::message_flags flags, int* addrlen, operation* op); | |
443 | ||
444 | // Helper function to start an asynchronous accept operation. | |
445 | BOOST_ASIO_DECL void start_accept_op(base_implementation_type& impl, | |
446 | bool peer_is_open, socket_holder& new_socket, int family, int type, | |
447 | int protocol, void* output_buffer, DWORD address_length, operation* op); | |
448 | ||
449 | // Start an asynchronous read or write operation using the reactor. | |
450 | BOOST_ASIO_DECL void start_reactor_op(base_implementation_type& impl, | |
451 | int op_type, reactor_op* op); | |
452 | ||
453 | // Start the asynchronous connect operation using the reactor. | |
454 | BOOST_ASIO_DECL void start_connect_op(base_implementation_type& impl, | |
455 | int family, int type, const socket_addr_type* remote_addr, | |
456 | std::size_t remote_addrlen, win_iocp_socket_connect_op_base* op); | |
457 | ||
458 | // Helper function to close a socket when the associated object is being | |
459 | // destroyed. | |
460 | BOOST_ASIO_DECL void close_for_destruction(base_implementation_type& impl); | |
461 | ||
462 | // Update the ID of the thread from which cancellation is safe. | |
463 | BOOST_ASIO_DECL void update_cancellation_thread_id( | |
464 | base_implementation_type& impl); | |
465 | ||
466 | // Helper function to get the reactor. If no reactor has been created yet, a | |
467 | // new one is obtained from the io_service and a pointer to it is cached in | |
468 | // this service. | |
469 | BOOST_ASIO_DECL reactor& get_reactor(); | |
470 | ||
471 | // The type of a ConnectEx function pointer, as old SDKs may not provide it. | |
472 | typedef BOOL (PASCAL *connect_ex_fn)(SOCKET, | |
473 | const socket_addr_type*, int, void*, DWORD, DWORD*, OVERLAPPED*); | |
474 | ||
475 | // Helper function to get the ConnectEx pointer. If no ConnectEx pointer has | |
476 | // been obtained yet, one is obtained using WSAIoctl and the pointer is | |
477 | // cached. Returns a null pointer if ConnectEx is not available. | |
478 | BOOST_ASIO_DECL connect_ex_fn get_connect_ex( | |
479 | base_implementation_type& impl, int type); | |
480 | ||
481 | // Helper function to emulate InterlockedCompareExchangePointer functionality | |
482 | // for: | |
483 | // - very old Platform SDKs; and | |
484 | // - platform SDKs where MSVC's /Wp64 option causes spurious warnings. | |
485 | BOOST_ASIO_DECL void* interlocked_compare_exchange_pointer( | |
486 | void** dest, void* exch, void* cmp); | |
487 | ||
488 | // Helper function to emulate InterlockedExchangePointer functionality for: | |
489 | // - very old Platform SDKs; and | |
490 | // - platform SDKs where MSVC's /Wp64 option causes spurious warnings. | |
491 | BOOST_ASIO_DECL void* interlocked_exchange_pointer(void** dest, void* val); | |
492 | ||
493 | // The io_service used to obtain the reactor, if required. | |
494 | boost::asio::io_service& io_service_; | |
495 | ||
496 | // The IOCP service used for running asynchronous operations and dispatching | |
497 | // handlers. | |
498 | win_iocp_io_service& iocp_service_; | |
499 | ||
500 | // The reactor used for performing connect operations. This object is created | |
501 | // only if needed. | |
502 | reactor* reactor_; | |
503 | ||
504 | // Pointer to ConnectEx implementation. | |
505 | void* connect_ex_; | |
506 | ||
507 | // Mutex to protect access to the linked list of implementations. | |
508 | boost::asio::detail::mutex mutex_; | |
509 | ||
510 | // The head of a linked list of all implementations. | |
511 | base_implementation_type* impl_list_; | |
512 | }; | |
513 | ||
514 | } // namespace detail | |
515 | } // namespace asio | |
516 | } // namespace boost | |
517 | ||
518 | #include <boost/asio/detail/pop_options.hpp> | |
519 | ||
520 | #if defined(BOOST_ASIO_HEADER_ONLY) | |
521 | # include <boost/asio/detail/impl/win_iocp_socket_service_base.ipp> | |
522 | #endif // defined(BOOST_ASIO_HEADER_ONLY) | |
523 | ||
524 | #endif // defined(BOOST_ASIO_HAS_IOCP) | |
525 | ||
526 | #endif // BOOST_ASIO_DETAIL_WIN_IOCP_SOCKET_SERVICE_BASE_HPP |