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1 | // |
2 | // detail/impl/win_iocp_socket_service_base.ipp | |
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_IMPL_WIN_IOCP_SOCKET_SERVICE_BASE_IPP | |
12 | #define BOOST_ASIO_DETAIL_IMPL_WIN_IOCP_SOCKET_SERVICE_BASE_IPP | |
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/detail/win_iocp_socket_service_base.hpp> | |
23 | ||
24 | #include <boost/asio/detail/push_options.hpp> | |
25 | ||
26 | namespace boost { | |
27 | namespace asio { | |
28 | namespace detail { | |
29 | ||
30 | win_iocp_socket_service_base::win_iocp_socket_service_base( | |
31 | boost::asio::io_service& io_service) | |
32 | : io_service_(io_service), | |
33 | iocp_service_(use_service<win_iocp_io_service>(io_service)), | |
34 | reactor_(0), | |
35 | connect_ex_(0), | |
36 | mutex_(), | |
37 | impl_list_(0) | |
38 | { | |
39 | } | |
40 | ||
41 | void win_iocp_socket_service_base::shutdown_service() | |
42 | { | |
43 | // Close all implementations, causing all operations to complete. | |
44 | boost::asio::detail::mutex::scoped_lock lock(mutex_); | |
45 | base_implementation_type* impl = impl_list_; | |
46 | while (impl) | |
47 | { | |
48 | boost::system::error_code ignored_ec; | |
49 | close_for_destruction(*impl); | |
50 | impl = impl->next_; | |
51 | } | |
52 | } | |
53 | ||
54 | void win_iocp_socket_service_base::construct( | |
55 | win_iocp_socket_service_base::base_implementation_type& impl) | |
56 | { | |
57 | impl.socket_ = invalid_socket; | |
58 | impl.state_ = 0; | |
59 | impl.cancel_token_.reset(); | |
60 | #if defined(BOOST_ASIO_ENABLE_CANCELIO) | |
61 | impl.safe_cancellation_thread_id_ = 0; | |
62 | #endif // defined(BOOST_ASIO_ENABLE_CANCELIO) | |
63 | ||
64 | // Insert implementation into linked list of all implementations. | |
65 | boost::asio::detail::mutex::scoped_lock lock(mutex_); | |
66 | impl.next_ = impl_list_; | |
67 | impl.prev_ = 0; | |
68 | if (impl_list_) | |
69 | impl_list_->prev_ = &impl; | |
70 | impl_list_ = &impl; | |
71 | } | |
72 | ||
73 | void win_iocp_socket_service_base::base_move_construct( | |
74 | win_iocp_socket_service_base::base_implementation_type& impl, | |
75 | win_iocp_socket_service_base::base_implementation_type& other_impl) | |
76 | { | |
77 | impl.socket_ = other_impl.socket_; | |
78 | other_impl.socket_ = invalid_socket; | |
79 | ||
80 | impl.state_ = other_impl.state_; | |
81 | other_impl.state_ = 0; | |
82 | ||
83 | impl.cancel_token_ = other_impl.cancel_token_; | |
84 | other_impl.cancel_token_.reset(); | |
85 | ||
86 | #if defined(BOOST_ASIO_ENABLE_CANCELIO) | |
87 | impl.safe_cancellation_thread_id_ = other_impl.safe_cancellation_thread_id_; | |
88 | other_impl.safe_cancellation_thread_id_ = 0; | |
89 | #endif // defined(BOOST_ASIO_ENABLE_CANCELIO) | |
90 | ||
91 | // Insert implementation into linked list of all implementations. | |
92 | boost::asio::detail::mutex::scoped_lock lock(mutex_); | |
93 | impl.next_ = impl_list_; | |
94 | impl.prev_ = 0; | |
95 | if (impl_list_) | |
96 | impl_list_->prev_ = &impl; | |
97 | impl_list_ = &impl; | |
98 | } | |
99 | ||
100 | void win_iocp_socket_service_base::base_move_assign( | |
101 | win_iocp_socket_service_base::base_implementation_type& impl, | |
102 | win_iocp_socket_service_base& other_service, | |
103 | win_iocp_socket_service_base::base_implementation_type& other_impl) | |
104 | { | |
105 | close_for_destruction(impl); | |
106 | ||
107 | if (this != &other_service) | |
108 | { | |
109 | // Remove implementation from linked list of all implementations. | |
110 | boost::asio::detail::mutex::scoped_lock lock(mutex_); | |
111 | if (impl_list_ == &impl) | |
112 | impl_list_ = impl.next_; | |
113 | if (impl.prev_) | |
114 | impl.prev_->next_ = impl.next_; | |
115 | if (impl.next_) | |
116 | impl.next_->prev_= impl.prev_; | |
117 | impl.next_ = 0; | |
118 | impl.prev_ = 0; | |
119 | } | |
120 | ||
121 | impl.socket_ = other_impl.socket_; | |
122 | other_impl.socket_ = invalid_socket; | |
123 | ||
124 | impl.state_ = other_impl.state_; | |
125 | other_impl.state_ = 0; | |
126 | ||
127 | impl.cancel_token_ = other_impl.cancel_token_; | |
128 | other_impl.cancel_token_.reset(); | |
129 | ||
130 | #if defined(BOOST_ASIO_ENABLE_CANCELIO) | |
131 | impl.safe_cancellation_thread_id_ = other_impl.safe_cancellation_thread_id_; | |
132 | other_impl.safe_cancellation_thread_id_ = 0; | |
133 | #endif // defined(BOOST_ASIO_ENABLE_CANCELIO) | |
134 | ||
135 | if (this != &other_service) | |
136 | { | |
137 | // Insert implementation into linked list of all implementations. | |
138 | boost::asio::detail::mutex::scoped_lock lock(other_service.mutex_); | |
139 | impl.next_ = other_service.impl_list_; | |
140 | impl.prev_ = 0; | |
141 | if (other_service.impl_list_) | |
142 | other_service.impl_list_->prev_ = &impl; | |
143 | other_service.impl_list_ = &impl; | |
144 | } | |
145 | } | |
146 | ||
147 | void win_iocp_socket_service_base::destroy( | |
148 | win_iocp_socket_service_base::base_implementation_type& impl) | |
149 | { | |
150 | close_for_destruction(impl); | |
151 | ||
152 | // Remove implementation from linked list of all implementations. | |
153 | boost::asio::detail::mutex::scoped_lock lock(mutex_); | |
154 | if (impl_list_ == &impl) | |
155 | impl_list_ = impl.next_; | |
156 | if (impl.prev_) | |
157 | impl.prev_->next_ = impl.next_; | |
158 | if (impl.next_) | |
159 | impl.next_->prev_= impl.prev_; | |
160 | impl.next_ = 0; | |
161 | impl.prev_ = 0; | |
162 | } | |
163 | ||
164 | boost::system::error_code win_iocp_socket_service_base::close( | |
165 | win_iocp_socket_service_base::base_implementation_type& impl, | |
166 | boost::system::error_code& ec) | |
167 | { | |
168 | if (is_open(impl)) | |
169 | { | |
170 | BOOST_ASIO_HANDLER_OPERATION(("socket", &impl, "close")); | |
171 | ||
172 | // Check if the reactor was created, in which case we need to close the | |
173 | // socket on the reactor as well to cancel any operations that might be | |
174 | // running there. | |
175 | reactor* r = static_cast<reactor*>( | |
176 | interlocked_compare_exchange_pointer( | |
177 | reinterpret_cast<void**>(&reactor_), 0, 0)); | |
178 | if (r) | |
179 | r->deregister_descriptor(impl.socket_, impl.reactor_data_, true); | |
180 | } | |
181 | ||
182 | socket_ops::close(impl.socket_, impl.state_, false, ec); | |
183 | ||
184 | impl.socket_ = invalid_socket; | |
185 | impl.state_ = 0; | |
186 | impl.cancel_token_.reset(); | |
187 | #if defined(BOOST_ASIO_ENABLE_CANCELIO) | |
188 | impl.safe_cancellation_thread_id_ = 0; | |
189 | #endif // defined(BOOST_ASIO_ENABLE_CANCELIO) | |
190 | ||
191 | return ec; | |
192 | } | |
193 | ||
194 | boost::system::error_code win_iocp_socket_service_base::cancel( | |
195 | win_iocp_socket_service_base::base_implementation_type& impl, | |
196 | boost::system::error_code& ec) | |
197 | { | |
198 | if (!is_open(impl)) | |
199 | { | |
200 | ec = boost::asio::error::bad_descriptor; | |
201 | return ec; | |
202 | } | |
203 | ||
204 | BOOST_ASIO_HANDLER_OPERATION(("socket", &impl, "cancel")); | |
205 | ||
206 | if (FARPROC cancel_io_ex_ptr = ::GetProcAddress( | |
207 | ::GetModuleHandleA("KERNEL32"), "CancelIoEx")) | |
208 | { | |
209 | // The version of Windows supports cancellation from any thread. | |
210 | typedef BOOL (WINAPI* cancel_io_ex_t)(HANDLE, LPOVERLAPPED); | |
211 | cancel_io_ex_t cancel_io_ex = (cancel_io_ex_t)cancel_io_ex_ptr; | |
212 | socket_type sock = impl.socket_; | |
213 | HANDLE sock_as_handle = reinterpret_cast<HANDLE>(sock); | |
214 | if (!cancel_io_ex(sock_as_handle, 0)) | |
215 | { | |
216 | DWORD last_error = ::GetLastError(); | |
217 | if (last_error == ERROR_NOT_FOUND) | |
218 | { | |
219 | // ERROR_NOT_FOUND means that there were no operations to be | |
220 | // cancelled. We swallow this error to match the behaviour on other | |
221 | // platforms. | |
222 | ec = boost::system::error_code(); | |
223 | } | |
224 | else | |
225 | { | |
226 | ec = boost::system::error_code(last_error, | |
227 | boost::asio::error::get_system_category()); | |
228 | } | |
229 | } | |
230 | else | |
231 | { | |
232 | ec = boost::system::error_code(); | |
233 | } | |
234 | } | |
235 | #if defined(BOOST_ASIO_ENABLE_CANCELIO) | |
236 | else if (impl.safe_cancellation_thread_id_ == 0) | |
237 | { | |
238 | // No operations have been started, so there's nothing to cancel. | |
239 | ec = boost::system::error_code(); | |
240 | } | |
241 | else if (impl.safe_cancellation_thread_id_ == ::GetCurrentThreadId()) | |
242 | { | |
243 | // Asynchronous operations have been started from the current thread only, | |
244 | // so it is safe to try to cancel them using CancelIo. | |
245 | socket_type sock = impl.socket_; | |
246 | HANDLE sock_as_handle = reinterpret_cast<HANDLE>(sock); | |
247 | if (!::CancelIo(sock_as_handle)) | |
248 | { | |
249 | DWORD last_error = ::GetLastError(); | |
250 | ec = boost::system::error_code(last_error, | |
251 | boost::asio::error::get_system_category()); | |
252 | } | |
253 | else | |
254 | { | |
255 | ec = boost::system::error_code(); | |
256 | } | |
257 | } | |
258 | else | |
259 | { | |
260 | // Asynchronous operations have been started from more than one thread, | |
261 | // so cancellation is not safe. | |
262 | ec = boost::asio::error::operation_not_supported; | |
263 | } | |
264 | #else // defined(BOOST_ASIO_ENABLE_CANCELIO) | |
265 | else | |
266 | { | |
267 | // Cancellation is not supported as CancelIo may not be used. | |
268 | ec = boost::asio::error::operation_not_supported; | |
269 | } | |
270 | #endif // defined(BOOST_ASIO_ENABLE_CANCELIO) | |
271 | ||
272 | // Cancel any operations started via the reactor. | |
273 | if (!ec) | |
274 | { | |
275 | reactor* r = static_cast<reactor*>( | |
276 | interlocked_compare_exchange_pointer( | |
277 | reinterpret_cast<void**>(&reactor_), 0, 0)); | |
278 | if (r) | |
279 | r->cancel_ops(impl.socket_, impl.reactor_data_); | |
280 | } | |
281 | ||
282 | return ec; | |
283 | } | |
284 | ||
285 | boost::system::error_code win_iocp_socket_service_base::do_open( | |
286 | win_iocp_socket_service_base::base_implementation_type& impl, | |
287 | int family, int type, int protocol, boost::system::error_code& ec) | |
288 | { | |
289 | if (is_open(impl)) | |
290 | { | |
291 | ec = boost::asio::error::already_open; | |
292 | return ec; | |
293 | } | |
294 | ||
295 | socket_holder sock(socket_ops::socket(family, type, protocol, ec)); | |
296 | if (sock.get() == invalid_socket) | |
297 | return ec; | |
298 | ||
299 | HANDLE sock_as_handle = reinterpret_cast<HANDLE>(sock.get()); | |
300 | if (iocp_service_.register_handle(sock_as_handle, ec)) | |
301 | return ec; | |
302 | ||
303 | impl.socket_ = sock.release(); | |
304 | switch (type) | |
305 | { | |
306 | case SOCK_STREAM: impl.state_ = socket_ops::stream_oriented; break; | |
307 | case SOCK_DGRAM: impl.state_ = socket_ops::datagram_oriented; break; | |
308 | default: impl.state_ = 0; break; | |
309 | } | |
310 | impl.cancel_token_.reset(static_cast<void*>(0), socket_ops::noop_deleter()); | |
311 | ec = boost::system::error_code(); | |
312 | return ec; | |
313 | } | |
314 | ||
315 | boost::system::error_code win_iocp_socket_service_base::do_assign( | |
316 | win_iocp_socket_service_base::base_implementation_type& impl, | |
317 | int type, socket_type native_socket, boost::system::error_code& ec) | |
318 | { | |
319 | if (is_open(impl)) | |
320 | { | |
321 | ec = boost::asio::error::already_open; | |
322 | return ec; | |
323 | } | |
324 | ||
325 | HANDLE sock_as_handle = reinterpret_cast<HANDLE>(native_socket); | |
326 | if (iocp_service_.register_handle(sock_as_handle, ec)) | |
327 | return ec; | |
328 | ||
329 | impl.socket_ = native_socket; | |
330 | switch (type) | |
331 | { | |
332 | case SOCK_STREAM: impl.state_ = socket_ops::stream_oriented; break; | |
333 | case SOCK_DGRAM: impl.state_ = socket_ops::datagram_oriented; break; | |
334 | default: impl.state_ = 0; break; | |
335 | } | |
336 | impl.cancel_token_.reset(static_cast<void*>(0), socket_ops::noop_deleter()); | |
337 | ec = boost::system::error_code(); | |
338 | return ec; | |
339 | } | |
340 | ||
341 | void win_iocp_socket_service_base::start_send_op( | |
342 | win_iocp_socket_service_base::base_implementation_type& impl, | |
343 | WSABUF* buffers, std::size_t buffer_count, | |
344 | socket_base::message_flags flags, bool noop, operation* op) | |
345 | { | |
346 | update_cancellation_thread_id(impl); | |
347 | iocp_service_.work_started(); | |
348 | ||
349 | if (noop) | |
350 | iocp_service_.on_completion(op); | |
351 | else if (!is_open(impl)) | |
352 | iocp_service_.on_completion(op, boost::asio::error::bad_descriptor); | |
353 | else | |
354 | { | |
355 | DWORD bytes_transferred = 0; | |
356 | int result = ::WSASend(impl.socket_, buffers, | |
357 | static_cast<DWORD>(buffer_count), &bytes_transferred, flags, op, 0); | |
358 | DWORD last_error = ::WSAGetLastError(); | |
359 | if (last_error == ERROR_PORT_UNREACHABLE) | |
360 | last_error = WSAECONNREFUSED; | |
361 | if (result != 0 && last_error != WSA_IO_PENDING) | |
362 | iocp_service_.on_completion(op, last_error, bytes_transferred); | |
363 | else | |
364 | iocp_service_.on_pending(op); | |
365 | } | |
366 | } | |
367 | ||
368 | void win_iocp_socket_service_base::start_send_to_op( | |
369 | win_iocp_socket_service_base::base_implementation_type& impl, | |
370 | WSABUF* buffers, std::size_t buffer_count, | |
371 | const socket_addr_type* addr, int addrlen, | |
372 | socket_base::message_flags flags, operation* op) | |
373 | { | |
374 | update_cancellation_thread_id(impl); | |
375 | iocp_service_.work_started(); | |
376 | ||
377 | if (!is_open(impl)) | |
378 | iocp_service_.on_completion(op, boost::asio::error::bad_descriptor); | |
379 | else | |
380 | { | |
381 | DWORD bytes_transferred = 0; | |
382 | int result = ::WSASendTo(impl.socket_, buffers, | |
383 | static_cast<DWORD>(buffer_count), | |
384 | &bytes_transferred, flags, addr, addrlen, op, 0); | |
385 | DWORD last_error = ::WSAGetLastError(); | |
386 | if (last_error == ERROR_PORT_UNREACHABLE) | |
387 | last_error = WSAECONNREFUSED; | |
388 | if (result != 0 && last_error != WSA_IO_PENDING) | |
389 | iocp_service_.on_completion(op, last_error, bytes_transferred); | |
390 | else | |
391 | iocp_service_.on_pending(op); | |
392 | } | |
393 | } | |
394 | ||
395 | void win_iocp_socket_service_base::start_receive_op( | |
396 | win_iocp_socket_service_base::base_implementation_type& impl, | |
397 | WSABUF* buffers, std::size_t buffer_count, | |
398 | socket_base::message_flags flags, bool noop, operation* op) | |
399 | { | |
400 | update_cancellation_thread_id(impl); | |
401 | iocp_service_.work_started(); | |
402 | ||
403 | if (noop) | |
404 | iocp_service_.on_completion(op); | |
405 | else if (!is_open(impl)) | |
406 | iocp_service_.on_completion(op, boost::asio::error::bad_descriptor); | |
407 | else | |
408 | { | |
409 | DWORD bytes_transferred = 0; | |
410 | DWORD recv_flags = flags; | |
411 | int result = ::WSARecv(impl.socket_, buffers, | |
412 | static_cast<DWORD>(buffer_count), | |
413 | &bytes_transferred, &recv_flags, op, 0); | |
414 | DWORD last_error = ::WSAGetLastError(); | |
415 | if (last_error == ERROR_NETNAME_DELETED) | |
416 | last_error = WSAECONNRESET; | |
417 | else if (last_error == ERROR_PORT_UNREACHABLE) | |
418 | last_error = WSAECONNREFUSED; | |
419 | if (result != 0 && last_error != WSA_IO_PENDING) | |
420 | iocp_service_.on_completion(op, last_error, bytes_transferred); | |
421 | else | |
422 | iocp_service_.on_pending(op); | |
423 | } | |
424 | } | |
425 | ||
426 | void win_iocp_socket_service_base::start_null_buffers_receive_op( | |
427 | win_iocp_socket_service_base::base_implementation_type& impl, | |
428 | socket_base::message_flags flags, reactor_op* op) | |
429 | { | |
430 | if ((impl.state_ & socket_ops::stream_oriented) != 0) | |
431 | { | |
432 | // For stream sockets on Windows, we may issue a 0-byte overlapped | |
433 | // WSARecv to wait until there is data available on the socket. | |
434 | ::WSABUF buf = { 0, 0 }; | |
435 | start_receive_op(impl, &buf, 1, flags, false, op); | |
436 | } | |
437 | else | |
438 | { | |
439 | start_reactor_op(impl, | |
440 | (flags & socket_base::message_out_of_band) | |
441 | ? reactor::except_op : reactor::read_op, | |
442 | op); | |
443 | } | |
444 | } | |
445 | ||
446 | void win_iocp_socket_service_base::start_receive_from_op( | |
447 | win_iocp_socket_service_base::base_implementation_type& impl, | |
448 | WSABUF* buffers, std::size_t buffer_count, socket_addr_type* addr, | |
449 | socket_base::message_flags flags, int* addrlen, operation* op) | |
450 | { | |
451 | update_cancellation_thread_id(impl); | |
452 | iocp_service_.work_started(); | |
453 | ||
454 | if (!is_open(impl)) | |
455 | iocp_service_.on_completion(op, boost::asio::error::bad_descriptor); | |
456 | else | |
457 | { | |
458 | DWORD bytes_transferred = 0; | |
459 | DWORD recv_flags = flags; | |
460 | int result = ::WSARecvFrom(impl.socket_, buffers, | |
461 | static_cast<DWORD>(buffer_count), | |
462 | &bytes_transferred, &recv_flags, addr, addrlen, op, 0); | |
463 | DWORD last_error = ::WSAGetLastError(); | |
464 | if (last_error == ERROR_PORT_UNREACHABLE) | |
465 | last_error = WSAECONNREFUSED; | |
466 | if (result != 0 && last_error != WSA_IO_PENDING) | |
467 | iocp_service_.on_completion(op, last_error, bytes_transferred); | |
468 | else | |
469 | iocp_service_.on_pending(op); | |
470 | } | |
471 | } | |
472 | ||
473 | void win_iocp_socket_service_base::start_accept_op( | |
474 | win_iocp_socket_service_base::base_implementation_type& impl, | |
475 | bool peer_is_open, socket_holder& new_socket, int family, int type, | |
476 | int protocol, void* output_buffer, DWORD address_length, operation* op) | |
477 | { | |
478 | update_cancellation_thread_id(impl); | |
479 | iocp_service_.work_started(); | |
480 | ||
481 | if (!is_open(impl)) | |
482 | iocp_service_.on_completion(op, boost::asio::error::bad_descriptor); | |
483 | else if (peer_is_open) | |
484 | iocp_service_.on_completion(op, boost::asio::error::already_open); | |
485 | else | |
486 | { | |
487 | boost::system::error_code ec; | |
488 | new_socket.reset(socket_ops::socket(family, type, protocol, ec)); | |
489 | if (new_socket.get() == invalid_socket) | |
490 | iocp_service_.on_completion(op, ec); | |
491 | else | |
492 | { | |
493 | DWORD bytes_read = 0; | |
494 | BOOL result = ::AcceptEx(impl.socket_, new_socket.get(), output_buffer, | |
495 | 0, address_length, address_length, &bytes_read, op); | |
496 | DWORD last_error = ::WSAGetLastError(); | |
497 | if (!result && last_error != WSA_IO_PENDING) | |
498 | iocp_service_.on_completion(op, last_error); | |
499 | else | |
500 | iocp_service_.on_pending(op); | |
501 | } | |
502 | } | |
503 | } | |
504 | ||
505 | void win_iocp_socket_service_base::restart_accept_op( | |
506 | socket_type s, socket_holder& new_socket, int family, int type, | |
507 | int protocol, void* output_buffer, DWORD address_length, operation* op) | |
508 | { | |
509 | new_socket.reset(); | |
510 | iocp_service_.work_started(); | |
511 | ||
512 | boost::system::error_code ec; | |
513 | new_socket.reset(socket_ops::socket(family, type, protocol, ec)); | |
514 | if (new_socket.get() == invalid_socket) | |
515 | iocp_service_.on_completion(op, ec); | |
516 | else | |
517 | { | |
518 | DWORD bytes_read = 0; | |
519 | BOOL result = ::AcceptEx(s, new_socket.get(), output_buffer, | |
520 | 0, address_length, address_length, &bytes_read, op); | |
521 | DWORD last_error = ::WSAGetLastError(); | |
522 | if (!result && last_error != WSA_IO_PENDING) | |
523 | iocp_service_.on_completion(op, last_error); | |
524 | else | |
525 | iocp_service_.on_pending(op); | |
526 | } | |
527 | } | |
528 | ||
529 | void win_iocp_socket_service_base::start_reactor_op( | |
530 | win_iocp_socket_service_base::base_implementation_type& impl, | |
531 | int op_type, reactor_op* op) | |
532 | { | |
533 | reactor& r = get_reactor(); | |
534 | update_cancellation_thread_id(impl); | |
535 | ||
536 | if (is_open(impl)) | |
537 | { | |
538 | r.start_op(op_type, impl.socket_, impl.reactor_data_, op, false, false); | |
539 | return; | |
540 | } | |
541 | else | |
542 | op->ec_ = boost::asio::error::bad_descriptor; | |
543 | ||
544 | iocp_service_.post_immediate_completion(op, false); | |
545 | } | |
546 | ||
547 | void win_iocp_socket_service_base::start_connect_op( | |
548 | win_iocp_socket_service_base::base_implementation_type& impl, | |
549 | int family, int type, const socket_addr_type* addr, | |
550 | std::size_t addrlen, win_iocp_socket_connect_op_base* op) | |
551 | { | |
552 | // If ConnectEx is available, use that. | |
553 | if (family == BOOST_ASIO_OS_DEF(AF_INET) | |
554 | || family == BOOST_ASIO_OS_DEF(AF_INET6)) | |
555 | { | |
556 | if (connect_ex_fn connect_ex = get_connect_ex(impl, type)) | |
557 | { | |
558 | union address_union | |
559 | { | |
560 | socket_addr_type base; | |
561 | sockaddr_in4_type v4; | |
562 | sockaddr_in6_type v6; | |
563 | } a; | |
564 | ||
565 | using namespace std; // For memset. | |
566 | memset(&a, 0, sizeof(a)); | |
567 | a.base.sa_family = family; | |
568 | ||
569 | socket_ops::bind(impl.socket_, &a.base, | |
570 | family == BOOST_ASIO_OS_DEF(AF_INET) | |
571 | ? sizeof(a.v4) : sizeof(a.v6), op->ec_); | |
572 | if (op->ec_ && op->ec_ != boost::asio::error::invalid_argument) | |
573 | { | |
574 | iocp_service_.post_immediate_completion(op, false); | |
575 | return; | |
576 | } | |
577 | ||
578 | op->connect_ex_ = true; | |
579 | update_cancellation_thread_id(impl); | |
580 | iocp_service_.work_started(); | |
581 | ||
582 | BOOL result = connect_ex(impl.socket_, | |
583 | addr, static_cast<int>(addrlen), 0, 0, 0, op); | |
584 | DWORD last_error = ::WSAGetLastError(); | |
585 | if (!result && last_error != WSA_IO_PENDING) | |
586 | iocp_service_.on_completion(op, last_error); | |
587 | else | |
588 | iocp_service_.on_pending(op); | |
589 | return; | |
590 | } | |
591 | } | |
592 | ||
593 | // Otherwise, fall back to a reactor-based implementation. | |
594 | reactor& r = get_reactor(); | |
595 | update_cancellation_thread_id(impl); | |
596 | ||
597 | if ((impl.state_ & socket_ops::non_blocking) != 0 | |
598 | || socket_ops::set_internal_non_blocking( | |
599 | impl.socket_, impl.state_, true, op->ec_)) | |
600 | { | |
601 | if (socket_ops::connect(impl.socket_, addr, addrlen, op->ec_) != 0) | |
602 | { | |
603 | if (op->ec_ == boost::asio::error::in_progress | |
604 | || op->ec_ == boost::asio::error::would_block) | |
605 | { | |
606 | op->ec_ = boost::system::error_code(); | |
607 | r.start_op(reactor::connect_op, impl.socket_, | |
608 | impl.reactor_data_, op, false, false); | |
609 | return; | |
610 | } | |
611 | } | |
612 | } | |
613 | ||
614 | r.post_immediate_completion(op, false); | |
615 | } | |
616 | ||
617 | void win_iocp_socket_service_base::close_for_destruction( | |
618 | win_iocp_socket_service_base::base_implementation_type& impl) | |
619 | { | |
620 | if (is_open(impl)) | |
621 | { | |
622 | BOOST_ASIO_HANDLER_OPERATION(("socket", &impl, "close")); | |
623 | ||
624 | // Check if the reactor was created, in which case we need to close the | |
625 | // socket on the reactor as well to cancel any operations that might be | |
626 | // running there. | |
627 | reactor* r = static_cast<reactor*>( | |
628 | interlocked_compare_exchange_pointer( | |
629 | reinterpret_cast<void**>(&reactor_), 0, 0)); | |
630 | if (r) | |
631 | r->deregister_descriptor(impl.socket_, impl.reactor_data_, true); | |
632 | } | |
633 | ||
634 | boost::system::error_code ignored_ec; | |
635 | socket_ops::close(impl.socket_, impl.state_, true, ignored_ec); | |
636 | impl.socket_ = invalid_socket; | |
637 | impl.state_ = 0; | |
638 | impl.cancel_token_.reset(); | |
639 | #if defined(BOOST_ASIO_ENABLE_CANCELIO) | |
640 | impl.safe_cancellation_thread_id_ = 0; | |
641 | #endif // defined(BOOST_ASIO_ENABLE_CANCELIO) | |
642 | } | |
643 | ||
644 | void win_iocp_socket_service_base::update_cancellation_thread_id( | |
645 | win_iocp_socket_service_base::base_implementation_type& impl) | |
646 | { | |
647 | #if defined(BOOST_ASIO_ENABLE_CANCELIO) | |
648 | if (impl.safe_cancellation_thread_id_ == 0) | |
649 | impl.safe_cancellation_thread_id_ = ::GetCurrentThreadId(); | |
650 | else if (impl.safe_cancellation_thread_id_ != ::GetCurrentThreadId()) | |
651 | impl.safe_cancellation_thread_id_ = ~DWORD(0); | |
652 | #else // defined(BOOST_ASIO_ENABLE_CANCELIO) | |
653 | (void)impl; | |
654 | #endif // defined(BOOST_ASIO_ENABLE_CANCELIO) | |
655 | } | |
656 | ||
657 | reactor& win_iocp_socket_service_base::get_reactor() | |
658 | { | |
659 | reactor* r = static_cast<reactor*>( | |
660 | interlocked_compare_exchange_pointer( | |
661 | reinterpret_cast<void**>(&reactor_), 0, 0)); | |
662 | if (!r) | |
663 | { | |
664 | r = &(use_service<reactor>(io_service_)); | |
665 | interlocked_exchange_pointer(reinterpret_cast<void**>(&reactor_), r); | |
666 | } | |
667 | return *r; | |
668 | } | |
669 | ||
670 | win_iocp_socket_service_base::connect_ex_fn | |
671 | win_iocp_socket_service_base::get_connect_ex( | |
672 | win_iocp_socket_service_base::base_implementation_type& impl, int type) | |
673 | { | |
674 | #if defined(BOOST_ASIO_DISABLE_CONNECTEX) | |
675 | (void)impl; | |
676 | (void)type; | |
677 | return 0; | |
678 | #else // defined(BOOST_ASIO_DISABLE_CONNECTEX) | |
679 | if (type != BOOST_ASIO_OS_DEF(SOCK_STREAM) | |
680 | && type != BOOST_ASIO_OS_DEF(SOCK_SEQPACKET)) | |
681 | return 0; | |
682 | ||
683 | void* ptr = interlocked_compare_exchange_pointer(&connect_ex_, 0, 0); | |
684 | if (!ptr) | |
685 | { | |
686 | GUID guid = { 0x25a207b9, 0xddf3, 0x4660, | |
687 | { 0x8e, 0xe9, 0x76, 0xe5, 0x8c, 0x74, 0x06, 0x3e } }; | |
688 | ||
689 | DWORD bytes = 0; | |
690 | if (::WSAIoctl(impl.socket_, SIO_GET_EXTENSION_FUNCTION_POINTER, | |
691 | &guid, sizeof(guid), &ptr, sizeof(ptr), &bytes, 0, 0) != 0) | |
692 | { | |
693 | // Set connect_ex_ to a special value to indicate that ConnectEx is | |
694 | // unavailable. That way we won't bother trying to look it up again. | |
695 | ptr = this; | |
696 | } | |
697 | ||
698 | interlocked_exchange_pointer(&connect_ex_, ptr); | |
699 | } | |
700 | ||
701 | return reinterpret_cast<connect_ex_fn>(ptr == this ? 0 : ptr); | |
702 | #endif // defined(BOOST_ASIO_DISABLE_CONNECTEX) | |
703 | } | |
704 | ||
705 | void* win_iocp_socket_service_base::interlocked_compare_exchange_pointer( | |
706 | void** dest, void* exch, void* cmp) | |
707 | { | |
708 | #if defined(_M_IX86) | |
709 | return reinterpret_cast<void*>(InterlockedCompareExchange( | |
710 | reinterpret_cast<PLONG>(dest), reinterpret_cast<LONG>(exch), | |
711 | reinterpret_cast<LONG>(cmp))); | |
712 | #else | |
713 | return InterlockedCompareExchangePointer(dest, exch, cmp); | |
714 | #endif | |
715 | } | |
716 | ||
717 | void* win_iocp_socket_service_base::interlocked_exchange_pointer( | |
718 | void** dest, void* val) | |
719 | { | |
720 | #if defined(_M_IX86) | |
721 | return reinterpret_cast<void*>(InterlockedExchange( | |
722 | reinterpret_cast<PLONG>(dest), reinterpret_cast<LONG>(val))); | |
723 | #else | |
724 | return InterlockedExchangePointer(dest, val); | |
725 | #endif | |
726 | } | |
727 | ||
728 | } // namespace detail | |
729 | } // namespace asio | |
730 | } // namespace boost | |
731 | ||
732 | #include <boost/asio/detail/pop_options.hpp> | |
733 | ||
734 | #endif // defined(BOOST_ASIO_HAS_IOCP) | |
735 | ||
736 | #endif // BOOST_ASIO_DETAIL_IMPL_WIN_IOCP_SOCKET_SERVICE_BASE_IPP |