Yury Selivanov | b0b0e62 | 2014-02-18 22:27:48 -0500 | [diff] [blame] | 1 | """Selector and proactor event loops for Windows.""" |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 2 | |
Victor Stinner | f2e1768 | 2014-01-31 16:25:24 +0100 | [diff] [blame] | 3 | import _winapi |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 4 | import errno |
Victor Stinner | f2e1768 | 2014-01-31 16:25:24 +0100 | [diff] [blame] | 5 | import math |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 6 | import socket |
Victor Stinner | f2e1768 | 2014-01-31 16:25:24 +0100 | [diff] [blame] | 7 | import struct |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 8 | import weakref |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 9 | |
Guido van Rossum | 0eaa5ac | 2013-11-04 15:50:46 -0800 | [diff] [blame] | 10 | from . import events |
Guido van Rossum | 5969128 | 2013-10-30 14:52:03 -0700 | [diff] [blame] | 11 | from . import base_subprocess |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 12 | from . import futures |
| 13 | from . import proactor_events |
| 14 | from . import selector_events |
| 15 | from . import tasks |
| 16 | from . import windows_utils |
Guido van Rossum | 5969128 | 2013-10-30 14:52:03 -0700 | [diff] [blame] | 17 | from . import _overlapped |
Victor Stinner | f951d28 | 2014-06-29 00:46:45 +0200 | [diff] [blame] | 18 | from .coroutines import coroutine |
| 19 | from .log import logger |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 20 | |
| 21 | |
Guido van Rossum | 0eaa5ac | 2013-11-04 15:50:46 -0800 | [diff] [blame] | 22 | __all__ = ['SelectorEventLoop', 'ProactorEventLoop', 'IocpProactor', |
| 23 | 'DefaultEventLoopPolicy', |
| 24 | ] |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 25 | |
| 26 | |
| 27 | NULL = 0 |
| 28 | INFINITE = 0xffffffff |
| 29 | ERROR_CONNECTION_REFUSED = 1225 |
| 30 | ERROR_CONNECTION_ABORTED = 1236 |
| 31 | |
Victor Stinner | 7ffa2c5 | 2015-01-22 22:55:08 +0100 | [diff] [blame] | 32 | # Initial delay in seconds for connect_pipe() before retrying to connect |
| 33 | CONNECT_PIPE_INIT_DELAY = 0.001 |
| 34 | |
| 35 | # Maximum delay in seconds for connect_pipe() before retrying to connect |
| 36 | CONNECT_PIPE_MAX_DELAY = 0.100 |
| 37 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 38 | |
| 39 | class _OverlappedFuture(futures.Future): |
| 40 | """Subclass of Future which represents an overlapped operation. |
| 41 | |
| 42 | Cancelling it will immediately cancel the overlapped operation. |
| 43 | """ |
| 44 | |
| 45 | def __init__(self, ov, *, loop=None): |
| 46 | super().__init__(loop=loop) |
Victor Stinner | fea6a10 | 2014-07-25 00:54:53 +0200 | [diff] [blame] | 47 | if self._source_traceback: |
| 48 | del self._source_traceback[-1] |
Victor Stinner | 18a28dc | 2014-07-25 13:05:20 +0200 | [diff] [blame] | 49 | self._ov = ov |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 50 | |
Victor Stinner | 313a980 | 2014-07-29 12:58:23 +0200 | [diff] [blame] | 51 | def _repr_info(self): |
| 52 | info = super()._repr_info() |
Victor Stinner | 18a28dc | 2014-07-25 13:05:20 +0200 | [diff] [blame] | 53 | if self._ov is not None: |
| 54 | state = 'pending' if self._ov.pending else 'completed' |
Victor Stinner | 313a980 | 2014-07-29 12:58:23 +0200 | [diff] [blame] | 55 | info.insert(1, 'overlapped=<%s, %#x>' % (state, self._ov.address)) |
| 56 | return info |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 57 | |
Victor Stinner | 18a28dc | 2014-07-25 13:05:20 +0200 | [diff] [blame] | 58 | def _cancel_overlapped(self): |
| 59 | if self._ov is None: |
| 60 | return |
| 61 | try: |
| 62 | self._ov.cancel() |
| 63 | except OSError as exc: |
| 64 | context = { |
| 65 | 'message': 'Cancelling an overlapped future failed', |
| 66 | 'exception': exc, |
| 67 | 'future': self, |
| 68 | } |
| 69 | if self._source_traceback: |
| 70 | context['source_traceback'] = self._source_traceback |
| 71 | self._loop.call_exception_handler(context) |
| 72 | self._ov = None |
| 73 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 74 | def cancel(self): |
Victor Stinner | 18a28dc | 2014-07-25 13:05:20 +0200 | [diff] [blame] | 75 | self._cancel_overlapped() |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 76 | return super().cancel() |
| 77 | |
Victor Stinner | 18a28dc | 2014-07-25 13:05:20 +0200 | [diff] [blame] | 78 | def set_exception(self, exception): |
| 79 | super().set_exception(exception) |
| 80 | self._cancel_overlapped() |
| 81 | |
Victor Stinner | 51e44ea | 2014-07-26 00:58:34 +0200 | [diff] [blame] | 82 | def set_result(self, result): |
| 83 | super().set_result(result) |
| 84 | self._ov = None |
| 85 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 86 | |
Victor Stinner | d0a28de | 2015-01-21 23:39:51 +0100 | [diff] [blame] | 87 | class _BaseWaitHandleFuture(futures.Future): |
Guido van Rossum | 90fb914 | 2013-10-30 14:44:05 -0700 | [diff] [blame] | 88 | """Subclass of Future which represents a wait handle.""" |
| 89 | |
Victor Stinner | d0a28de | 2015-01-21 23:39:51 +0100 | [diff] [blame] | 90 | def __init__(self, ov, handle, wait_handle, *, loop=None): |
Guido van Rossum | 90fb914 | 2013-10-30 14:44:05 -0700 | [diff] [blame] | 91 | super().__init__(loop=loop) |
Victor Stinner | 313a980 | 2014-07-29 12:58:23 +0200 | [diff] [blame] | 92 | if self._source_traceback: |
| 93 | del self._source_traceback[-1] |
Victor Stinner | d0a28de | 2015-01-21 23:39:51 +0100 | [diff] [blame] | 94 | # Keep a reference to the Overlapped object to keep it alive until the |
| 95 | # wait is unregistered |
Victor Stinner | 313a980 | 2014-07-29 12:58:23 +0200 | [diff] [blame] | 96 | self._ov = ov |
Victor Stinner | 18a28dc | 2014-07-25 13:05:20 +0200 | [diff] [blame] | 97 | self._handle = handle |
Guido van Rossum | 90fb914 | 2013-10-30 14:44:05 -0700 | [diff] [blame] | 98 | self._wait_handle = wait_handle |
| 99 | |
Victor Stinner | d0a28de | 2015-01-21 23:39:51 +0100 | [diff] [blame] | 100 | # Should we call UnregisterWaitEx() if the wait completes |
| 101 | # or is cancelled? |
| 102 | self._registered = True |
| 103 | |
Victor Stinner | 18a28dc | 2014-07-25 13:05:20 +0200 | [diff] [blame] | 104 | def _poll(self): |
| 105 | # non-blocking wait: use a timeout of 0 millisecond |
| 106 | return (_winapi.WaitForSingleObject(self._handle, 0) == |
| 107 | _winapi.WAIT_OBJECT_0) |
| 108 | |
Victor Stinner | 313a980 | 2014-07-29 12:58:23 +0200 | [diff] [blame] | 109 | def _repr_info(self): |
| 110 | info = super()._repr_info() |
Victor Stinner | d0a28de | 2015-01-21 23:39:51 +0100 | [diff] [blame] | 111 | info.append('handle=%#x' % self._handle) |
| 112 | if self._handle is not None: |
Victor Stinner | 313a980 | 2014-07-29 12:58:23 +0200 | [diff] [blame] | 113 | state = 'signaled' if self._poll() else 'waiting' |
Victor Stinner | d0a28de | 2015-01-21 23:39:51 +0100 | [diff] [blame] | 114 | info.append(state) |
| 115 | if self._wait_handle is not None: |
| 116 | info.append('wait_handle=%#x' % self._wait_handle) |
Victor Stinner | 313a980 | 2014-07-29 12:58:23 +0200 | [diff] [blame] | 117 | return info |
Victor Stinner | 18a28dc | 2014-07-25 13:05:20 +0200 | [diff] [blame] | 118 | |
Victor Stinner | d0a28de | 2015-01-21 23:39:51 +0100 | [diff] [blame] | 119 | def _unregister_wait_cb(self, fut): |
| 120 | # The wait was unregistered: it's not safe to destroy the Overlapped |
| 121 | # object |
| 122 | self._ov = None |
| 123 | |
Victor Stinner | 313a980 | 2014-07-29 12:58:23 +0200 | [diff] [blame] | 124 | def _unregister_wait(self): |
Victor Stinner | d0a28de | 2015-01-21 23:39:51 +0100 | [diff] [blame] | 125 | if not self._registered: |
Victor Stinner | fea6a10 | 2014-07-25 00:54:53 +0200 | [diff] [blame] | 126 | return |
Victor Stinner | d0a28de | 2015-01-21 23:39:51 +0100 | [diff] [blame] | 127 | self._registered = False |
| 128 | |
Victor Stinner | 24dfa3c | 2015-01-26 22:30:28 +0100 | [diff] [blame] | 129 | wait_handle = self._wait_handle |
| 130 | self._wait_handle = None |
Guido van Rossum | 90fb914 | 2013-10-30 14:44:05 -0700 | [diff] [blame] | 131 | try: |
Victor Stinner | 24dfa3c | 2015-01-26 22:30:28 +0100 | [diff] [blame] | 132 | _overlapped.UnregisterWait(wait_handle) |
Victor Stinner | b261475 | 2014-08-25 23:20:52 +0200 | [diff] [blame] | 133 | except OSError as exc: |
Victor Stinner | 24dfa3c | 2015-01-26 22:30:28 +0100 | [diff] [blame] | 134 | if exc.winerror != _overlapped.ERROR_IO_PENDING: |
Victor Stinner | b261475 | 2014-08-25 23:20:52 +0200 | [diff] [blame] | 135 | context = { |
| 136 | 'message': 'Failed to unregister the wait handle', |
| 137 | 'exception': exc, |
| 138 | 'future': self, |
| 139 | } |
| 140 | if self._source_traceback: |
| 141 | context['source_traceback'] = self._source_traceback |
| 142 | self._loop.call_exception_handler(context) |
Victor Stinner | 24dfa3c | 2015-01-26 22:30:28 +0100 | [diff] [blame] | 143 | return |
| 144 | # ERROR_IO_PENDING means that the unregister is pending |
| 145 | |
| 146 | self._unregister_wait_cb(None) |
Victor Stinner | fea6a10 | 2014-07-25 00:54:53 +0200 | [diff] [blame] | 147 | |
| 148 | def cancel(self): |
Victor Stinner | 313a980 | 2014-07-29 12:58:23 +0200 | [diff] [blame] | 149 | self._unregister_wait() |
Victor Stinner | d0a28de | 2015-01-21 23:39:51 +0100 | [diff] [blame] | 150 | return super().cancel() |
Victor Stinner | 313a980 | 2014-07-29 12:58:23 +0200 | [diff] [blame] | 151 | |
| 152 | def set_exception(self, exception): |
Victor Stinner | 313a980 | 2014-07-29 12:58:23 +0200 | [diff] [blame] | 153 | self._unregister_wait() |
Victor Stinner | d0a28de | 2015-01-21 23:39:51 +0100 | [diff] [blame] | 154 | super().set_exception(exception) |
Victor Stinner | 313a980 | 2014-07-29 12:58:23 +0200 | [diff] [blame] | 155 | |
| 156 | def set_result(self, result): |
Victor Stinner | 313a980 | 2014-07-29 12:58:23 +0200 | [diff] [blame] | 157 | self._unregister_wait() |
Victor Stinner | d0a28de | 2015-01-21 23:39:51 +0100 | [diff] [blame] | 158 | super().set_result(result) |
| 159 | |
| 160 | |
| 161 | class _WaitCancelFuture(_BaseWaitHandleFuture): |
| 162 | """Subclass of Future which represents a wait for the cancellation of a |
| 163 | _WaitHandleFuture using an event. |
| 164 | """ |
| 165 | |
| 166 | def __init__(self, ov, event, wait_handle, *, loop=None): |
| 167 | super().__init__(ov, event, wait_handle, loop=loop) |
| 168 | |
| 169 | self._done_callback = None |
| 170 | |
Victor Stinner | 1ca9392 | 2015-01-22 00:17:54 +0100 | [diff] [blame] | 171 | def cancel(self): |
| 172 | raise RuntimeError("_WaitCancelFuture must not be cancelled") |
| 173 | |
Victor Stinner | d0a28de | 2015-01-21 23:39:51 +0100 | [diff] [blame] | 174 | def _schedule_callbacks(self): |
| 175 | super(_WaitCancelFuture, self)._schedule_callbacks() |
| 176 | if self._done_callback is not None: |
| 177 | self._done_callback(self) |
| 178 | |
| 179 | |
| 180 | class _WaitHandleFuture(_BaseWaitHandleFuture): |
| 181 | def __init__(self, ov, handle, wait_handle, proactor, *, loop=None): |
| 182 | super().__init__(ov, handle, wait_handle, loop=loop) |
| 183 | self._proactor = proactor |
| 184 | self._unregister_proactor = True |
| 185 | self._event = _overlapped.CreateEvent(None, True, False, None) |
| 186 | self._event_fut = None |
| 187 | |
| 188 | def _unregister_wait_cb(self, fut): |
| 189 | if self._event is not None: |
| 190 | _winapi.CloseHandle(self._event) |
| 191 | self._event = None |
| 192 | self._event_fut = None |
| 193 | |
| 194 | # If the wait was cancelled, the wait may never be signalled, so |
| 195 | # it's required to unregister it. Otherwise, IocpProactor.close() will |
| 196 | # wait forever for an event which will never come. |
| 197 | # |
| 198 | # If the IocpProactor already received the event, it's safe to call |
| 199 | # _unregister() because we kept a reference to the Overlapped object |
Martin Panter | 6245cb3 | 2016-04-15 02:14:19 +0000 | [diff] [blame] | 200 | # which is used as a unique key. |
Victor Stinner | d0a28de | 2015-01-21 23:39:51 +0100 | [diff] [blame] | 201 | self._proactor._unregister(self._ov) |
| 202 | self._proactor = None |
| 203 | |
| 204 | super()._unregister_wait_cb(fut) |
| 205 | |
| 206 | def _unregister_wait(self): |
| 207 | if not self._registered: |
| 208 | return |
| 209 | self._registered = False |
| 210 | |
Victor Stinner | 24dfa3c | 2015-01-26 22:30:28 +0100 | [diff] [blame] | 211 | wait_handle = self._wait_handle |
| 212 | self._wait_handle = None |
Victor Stinner | d0a28de | 2015-01-21 23:39:51 +0100 | [diff] [blame] | 213 | try: |
Victor Stinner | 24dfa3c | 2015-01-26 22:30:28 +0100 | [diff] [blame] | 214 | _overlapped.UnregisterWaitEx(wait_handle, self._event) |
Victor Stinner | d0a28de | 2015-01-21 23:39:51 +0100 | [diff] [blame] | 215 | except OSError as exc: |
Victor Stinner | 24dfa3c | 2015-01-26 22:30:28 +0100 | [diff] [blame] | 216 | if exc.winerror != _overlapped.ERROR_IO_PENDING: |
Victor Stinner | d0a28de | 2015-01-21 23:39:51 +0100 | [diff] [blame] | 217 | context = { |
| 218 | 'message': 'Failed to unregister the wait handle', |
| 219 | 'exception': exc, |
| 220 | 'future': self, |
| 221 | } |
| 222 | if self._source_traceback: |
| 223 | context['source_traceback'] = self._source_traceback |
| 224 | self._loop.call_exception_handler(context) |
Victor Stinner | 24dfa3c | 2015-01-26 22:30:28 +0100 | [diff] [blame] | 225 | return |
| 226 | # ERROR_IO_PENDING is not an error, the wait was unregistered |
| 227 | |
| 228 | self._event_fut = self._proactor._wait_cancel(self._event, |
| 229 | self._unregister_wait_cb) |
Guido van Rossum | 90fb914 | 2013-10-30 14:44:05 -0700 | [diff] [blame] | 230 | |
| 231 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 232 | class PipeServer(object): |
| 233 | """Class representing a pipe server. |
| 234 | |
| 235 | This is much like a bound, listening socket. |
| 236 | """ |
| 237 | def __init__(self, address): |
| 238 | self._address = address |
| 239 | self._free_instances = weakref.WeakSet() |
Victor Stinner | b261475 | 2014-08-25 23:20:52 +0200 | [diff] [blame] | 240 | # initialize the pipe attribute before calling _server_pipe_handle() |
| 241 | # because this function can raise an exception and the destructor calls |
| 242 | # the close() method |
| 243 | self._pipe = None |
| 244 | self._accept_pipe_future = None |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 245 | self._pipe = self._server_pipe_handle(True) |
| 246 | |
| 247 | def _get_unconnected_pipe(self): |
| 248 | # Create new instance and return previous one. This ensures |
| 249 | # that (until the server is closed) there is always at least |
| 250 | # one pipe handle for address. Therefore if a client attempt |
| 251 | # to connect it will not fail with FileNotFoundError. |
| 252 | tmp, self._pipe = self._pipe, self._server_pipe_handle(False) |
| 253 | return tmp |
| 254 | |
| 255 | def _server_pipe_handle(self, first): |
| 256 | # Return a wrapper for a new pipe handle. |
Victor Stinner | a19b7b3 | 2015-01-26 15:03:20 +0100 | [diff] [blame] | 257 | if self.closed(): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 258 | return None |
| 259 | flags = _winapi.PIPE_ACCESS_DUPLEX | _winapi.FILE_FLAG_OVERLAPPED |
| 260 | if first: |
| 261 | flags |= _winapi.FILE_FLAG_FIRST_PIPE_INSTANCE |
| 262 | h = _winapi.CreateNamedPipe( |
| 263 | self._address, flags, |
| 264 | _winapi.PIPE_TYPE_MESSAGE | _winapi.PIPE_READMODE_MESSAGE | |
| 265 | _winapi.PIPE_WAIT, |
| 266 | _winapi.PIPE_UNLIMITED_INSTANCES, |
| 267 | windows_utils.BUFSIZE, windows_utils.BUFSIZE, |
| 268 | _winapi.NMPWAIT_WAIT_FOREVER, _winapi.NULL) |
| 269 | pipe = windows_utils.PipeHandle(h) |
| 270 | self._free_instances.add(pipe) |
| 271 | return pipe |
| 272 | |
Victor Stinner | a19b7b3 | 2015-01-26 15:03:20 +0100 | [diff] [blame] | 273 | def closed(self): |
| 274 | return (self._address is None) |
| 275 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 276 | def close(self): |
Victor Stinner | b261475 | 2014-08-25 23:20:52 +0200 | [diff] [blame] | 277 | if self._accept_pipe_future is not None: |
| 278 | self._accept_pipe_future.cancel() |
| 279 | self._accept_pipe_future = None |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 280 | # Close all instances which have not been connected to by a client. |
| 281 | if self._address is not None: |
| 282 | for pipe in self._free_instances: |
| 283 | pipe.close() |
| 284 | self._pipe = None |
| 285 | self._address = None |
| 286 | self._free_instances.clear() |
| 287 | |
| 288 | __del__ = close |
| 289 | |
| 290 | |
Guido van Rossum | 0eaa5ac | 2013-11-04 15:50:46 -0800 | [diff] [blame] | 291 | class _WindowsSelectorEventLoop(selector_events.BaseSelectorEventLoop): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 292 | """Windows version of selector event loop.""" |
| 293 | |
| 294 | def _socketpair(self): |
| 295 | return windows_utils.socketpair() |
| 296 | |
| 297 | |
| 298 | class ProactorEventLoop(proactor_events.BaseProactorEventLoop): |
| 299 | """Windows version of proactor event loop using IOCP.""" |
| 300 | |
| 301 | def __init__(self, proactor=None): |
| 302 | if proactor is None: |
| 303 | proactor = IocpProactor() |
| 304 | super().__init__(proactor) |
| 305 | |
| 306 | def _socketpair(self): |
| 307 | return windows_utils.socketpair() |
| 308 | |
Victor Stinner | f951d28 | 2014-06-29 00:46:45 +0200 | [diff] [blame] | 309 | @coroutine |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 310 | def create_pipe_connection(self, protocol_factory, address): |
| 311 | f = self._proactor.connect_pipe(address) |
| 312 | pipe = yield from f |
| 313 | protocol = protocol_factory() |
| 314 | trans = self._make_duplex_pipe_transport(pipe, protocol, |
| 315 | extra={'addr': address}) |
| 316 | return trans, protocol |
| 317 | |
Victor Stinner | f951d28 | 2014-06-29 00:46:45 +0200 | [diff] [blame] | 318 | @coroutine |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 319 | def start_serving_pipe(self, protocol_factory, address): |
| 320 | server = PipeServer(address) |
Guido van Rossum | a8d630a | 2013-11-01 14:20:55 -0700 | [diff] [blame] | 321 | |
Victor Stinner | b261475 | 2014-08-25 23:20:52 +0200 | [diff] [blame] | 322 | def loop_accept_pipe(f=None): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 323 | pipe = None |
| 324 | try: |
| 325 | if f: |
| 326 | pipe = f.result() |
| 327 | server._free_instances.discard(pipe) |
Victor Stinner | a19b7b3 | 2015-01-26 15:03:20 +0100 | [diff] [blame] | 328 | |
| 329 | if server.closed(): |
| 330 | # A client connected before the server was closed: |
| 331 | # drop the client (close the pipe) and exit |
| 332 | pipe.close() |
| 333 | return |
| 334 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 335 | protocol = protocol_factory() |
| 336 | self._make_duplex_pipe_transport( |
| 337 | pipe, protocol, extra={'addr': address}) |
Victor Stinner | a19b7b3 | 2015-01-26 15:03:20 +0100 | [diff] [blame] | 338 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 339 | pipe = server._get_unconnected_pipe() |
| 340 | if pipe is None: |
| 341 | return |
Victor Stinner | a19b7b3 | 2015-01-26 15:03:20 +0100 | [diff] [blame] | 342 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 343 | f = self._proactor.accept_pipe(pipe) |
Yury Selivanov | ff827f0 | 2014-02-18 18:02:19 -0500 | [diff] [blame] | 344 | except OSError as exc: |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 345 | if pipe and pipe.fileno() != -1: |
Yury Selivanov | ff827f0 | 2014-02-18 18:02:19 -0500 | [diff] [blame] | 346 | self.call_exception_handler({ |
| 347 | 'message': 'Pipe accept failed', |
| 348 | 'exception': exc, |
| 349 | 'pipe': pipe, |
| 350 | }) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 351 | pipe.close() |
Victor Stinner | b261475 | 2014-08-25 23:20:52 +0200 | [diff] [blame] | 352 | elif self._debug: |
| 353 | logger.warning("Accept pipe failed on pipe %r", |
| 354 | pipe, exc_info=True) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 355 | except futures.CancelledError: |
| 356 | if pipe: |
| 357 | pipe.close() |
| 358 | else: |
Victor Stinner | b261475 | 2014-08-25 23:20:52 +0200 | [diff] [blame] | 359 | server._accept_pipe_future = f |
| 360 | f.add_done_callback(loop_accept_pipe) |
Guido van Rossum | a8d630a | 2013-11-01 14:20:55 -0700 | [diff] [blame] | 361 | |
Victor Stinner | b261475 | 2014-08-25 23:20:52 +0200 | [diff] [blame] | 362 | self.call_soon(loop_accept_pipe) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 363 | return [server] |
| 364 | |
Victor Stinner | f951d28 | 2014-06-29 00:46:45 +0200 | [diff] [blame] | 365 | @coroutine |
Guido van Rossum | 5969128 | 2013-10-30 14:52:03 -0700 | [diff] [blame] | 366 | def _make_subprocess_transport(self, protocol, args, shell, |
| 367 | stdin, stdout, stderr, bufsize, |
| 368 | extra=None, **kwargs): |
Yury Selivanov | 7661db6 | 2016-05-16 15:38:39 -0400 | [diff] [blame] | 369 | waiter = self.create_future() |
Guido van Rossum | 5969128 | 2013-10-30 14:52:03 -0700 | [diff] [blame] | 370 | transp = _WindowsSubprocessTransport(self, protocol, args, shell, |
| 371 | stdin, stdout, stderr, bufsize, |
Victor Stinner | 47cd10d | 2015-01-30 00:05:19 +0100 | [diff] [blame] | 372 | waiter=waiter, extra=extra, |
| 373 | **kwargs) |
Victor Stinner | 4bf22e0 | 2015-01-15 14:24:22 +0100 | [diff] [blame] | 374 | try: |
Victor Stinner | 47cd10d | 2015-01-30 00:05:19 +0100 | [diff] [blame] | 375 | yield from waiter |
Victor Stinner | 5d44c08 | 2015-02-02 18:36:31 +0100 | [diff] [blame] | 376 | except Exception as exc: |
| 377 | # Workaround CPython bug #23353: using yield/yield-from in an |
| 378 | # except block of a generator doesn't clear properly sys.exc_info() |
| 379 | err = exc |
| 380 | else: |
| 381 | err = None |
| 382 | |
| 383 | if err is not None: |
Victor Stinner | 4bf22e0 | 2015-01-15 14:24:22 +0100 | [diff] [blame] | 384 | transp.close() |
Victor Stinner | 1241ecc | 2015-01-30 00:16:14 +0100 | [diff] [blame] | 385 | yield from transp._wait() |
Victor Stinner | 5d44c08 | 2015-02-02 18:36:31 +0100 | [diff] [blame] | 386 | raise err |
Victor Stinner | 4bf22e0 | 2015-01-15 14:24:22 +0100 | [diff] [blame] | 387 | |
Guido van Rossum | 5969128 | 2013-10-30 14:52:03 -0700 | [diff] [blame] | 388 | return transp |
| 389 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 390 | |
| 391 | class IocpProactor: |
| 392 | """Proactor implementation using IOCP.""" |
| 393 | |
| 394 | def __init__(self, concurrency=0xffffffff): |
| 395 | self._loop = None |
| 396 | self._results = [] |
| 397 | self._iocp = _overlapped.CreateIoCompletionPort( |
| 398 | _overlapped.INVALID_HANDLE_VALUE, NULL, 0, concurrency) |
| 399 | self._cache = {} |
| 400 | self._registered = weakref.WeakSet() |
Victor Stinner | d0a28de | 2015-01-21 23:39:51 +0100 | [diff] [blame] | 401 | self._unregistered = [] |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 402 | self._stopped_serving = weakref.WeakSet() |
| 403 | |
Victor Stinner | fea6a10 | 2014-07-25 00:54:53 +0200 | [diff] [blame] | 404 | def __repr__(self): |
| 405 | return ('<%s overlapped#=%s result#=%s>' |
| 406 | % (self.__class__.__name__, len(self._cache), |
| 407 | len(self._results))) |
| 408 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 409 | def set_loop(self, loop): |
| 410 | self._loop = loop |
| 411 | |
| 412 | def select(self, timeout=None): |
| 413 | if not self._results: |
| 414 | self._poll(timeout) |
| 415 | tmp = self._results |
| 416 | self._results = [] |
| 417 | return tmp |
| 418 | |
Victor Stinner | 41063d2 | 2015-01-26 22:30:49 +0100 | [diff] [blame] | 419 | def _result(self, value): |
Yury Selivanov | 7661db6 | 2016-05-16 15:38:39 -0400 | [diff] [blame] | 420 | fut = self._loop.create_future() |
Victor Stinner | 41063d2 | 2015-01-26 22:30:49 +0100 | [diff] [blame] | 421 | fut.set_result(value) |
| 422 | return fut |
| 423 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 424 | def recv(self, conn, nbytes, flags=0): |
| 425 | self._register_with_iocp(conn) |
| 426 | ov = _overlapped.Overlapped(NULL) |
Victor Stinner | 41063d2 | 2015-01-26 22:30:49 +0100 | [diff] [blame] | 427 | try: |
| 428 | if isinstance(conn, socket.socket): |
| 429 | ov.WSARecv(conn.fileno(), nbytes, flags) |
| 430 | else: |
| 431 | ov.ReadFile(conn.fileno(), nbytes) |
| 432 | except BrokenPipeError: |
| 433 | return self._result(b'') |
Guido van Rossum | a8d630a | 2013-11-01 14:20:55 -0700 | [diff] [blame] | 434 | |
Victor Stinner | c89c8a7 | 2014-02-26 17:35:30 +0100 | [diff] [blame] | 435 | def finish_recv(trans, key, ov): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 436 | try: |
| 437 | return ov.getresult() |
| 438 | except OSError as exc: |
| 439 | if exc.winerror == _overlapped.ERROR_NETNAME_DELETED: |
| 440 | raise ConnectionResetError(*exc.args) |
| 441 | else: |
| 442 | raise |
Guido van Rossum | a8d630a | 2013-11-01 14:20:55 -0700 | [diff] [blame] | 443 | |
Victor Stinner | c89c8a7 | 2014-02-26 17:35:30 +0100 | [diff] [blame] | 444 | return self._register(ov, conn, finish_recv) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 445 | |
| 446 | def send(self, conn, buf, flags=0): |
| 447 | self._register_with_iocp(conn) |
| 448 | ov = _overlapped.Overlapped(NULL) |
| 449 | if isinstance(conn, socket.socket): |
| 450 | ov.WSASend(conn.fileno(), buf, flags) |
| 451 | else: |
| 452 | ov.WriteFile(conn.fileno(), buf) |
Guido van Rossum | a8d630a | 2013-11-01 14:20:55 -0700 | [diff] [blame] | 453 | |
Victor Stinner | c89c8a7 | 2014-02-26 17:35:30 +0100 | [diff] [blame] | 454 | def finish_send(trans, key, ov): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 455 | try: |
| 456 | return ov.getresult() |
| 457 | except OSError as exc: |
| 458 | if exc.winerror == _overlapped.ERROR_NETNAME_DELETED: |
| 459 | raise ConnectionResetError(*exc.args) |
| 460 | else: |
| 461 | raise |
Guido van Rossum | a8d630a | 2013-11-01 14:20:55 -0700 | [diff] [blame] | 462 | |
Victor Stinner | c89c8a7 | 2014-02-26 17:35:30 +0100 | [diff] [blame] | 463 | return self._register(ov, conn, finish_send) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 464 | |
| 465 | def accept(self, listener): |
| 466 | self._register_with_iocp(listener) |
| 467 | conn = self._get_accept_socket(listener.family) |
| 468 | ov = _overlapped.Overlapped(NULL) |
| 469 | ov.AcceptEx(listener.fileno(), conn.fileno()) |
Guido van Rossum | a8d630a | 2013-11-01 14:20:55 -0700 | [diff] [blame] | 470 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 471 | def finish_accept(trans, key, ov): |
| 472 | ov.getresult() |
| 473 | # Use SO_UPDATE_ACCEPT_CONTEXT so getsockname() etc work. |
| 474 | buf = struct.pack('@P', listener.fileno()) |
| 475 | conn.setsockopt(socket.SOL_SOCKET, |
| 476 | _overlapped.SO_UPDATE_ACCEPT_CONTEXT, buf) |
| 477 | conn.settimeout(listener.gettimeout()) |
| 478 | return conn, conn.getpeername() |
Guido van Rossum | a8d630a | 2013-11-01 14:20:55 -0700 | [diff] [blame] | 479 | |
Victor Stinner | f951d28 | 2014-06-29 00:46:45 +0200 | [diff] [blame] | 480 | @coroutine |
Victor Stinner | 7de2646 | 2014-01-11 00:03:21 +0100 | [diff] [blame] | 481 | def accept_coro(future, conn): |
| 482 | # Coroutine closing the accept socket if the future is cancelled |
| 483 | try: |
| 484 | yield from future |
| 485 | except futures.CancelledError: |
| 486 | conn.close() |
| 487 | raise |
| 488 | |
| 489 | future = self._register(ov, listener, finish_accept) |
| 490 | coro = accept_coro(future, conn) |
Yury Selivanov | 59eb9a4 | 2015-05-11 14:48:38 -0400 | [diff] [blame] | 491 | tasks.ensure_future(coro, loop=self._loop) |
Victor Stinner | 7de2646 | 2014-01-11 00:03:21 +0100 | [diff] [blame] | 492 | return future |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 493 | |
| 494 | def connect(self, conn, address): |
| 495 | self._register_with_iocp(conn) |
| 496 | # The socket needs to be locally bound before we call ConnectEx(). |
| 497 | try: |
| 498 | _overlapped.BindLocal(conn.fileno(), conn.family) |
| 499 | except OSError as e: |
| 500 | if e.winerror != errno.WSAEINVAL: |
| 501 | raise |
| 502 | # Probably already locally bound; check using getsockname(). |
| 503 | if conn.getsockname()[1] == 0: |
| 504 | raise |
| 505 | ov = _overlapped.Overlapped(NULL) |
| 506 | ov.ConnectEx(conn.fileno(), address) |
Guido van Rossum | a8d630a | 2013-11-01 14:20:55 -0700 | [diff] [blame] | 507 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 508 | def finish_connect(trans, key, ov): |
| 509 | ov.getresult() |
| 510 | # Use SO_UPDATE_CONNECT_CONTEXT so getsockname() etc work. |
| 511 | conn.setsockopt(socket.SOL_SOCKET, |
| 512 | _overlapped.SO_UPDATE_CONNECT_CONTEXT, 0) |
| 513 | return conn |
Guido van Rossum | a8d630a | 2013-11-01 14:20:55 -0700 | [diff] [blame] | 514 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 515 | return self._register(ov, conn, finish_connect) |
| 516 | |
| 517 | def accept_pipe(self, pipe): |
| 518 | self._register_with_iocp(pipe) |
| 519 | ov = _overlapped.Overlapped(NULL) |
Victor Stinner | 2b77c54 | 2015-01-22 23:50:03 +0100 | [diff] [blame] | 520 | connected = ov.ConnectNamedPipe(pipe.fileno()) |
| 521 | |
| 522 | if connected: |
| 523 | # ConnectNamePipe() failed with ERROR_PIPE_CONNECTED which means |
| 524 | # that the pipe is connected. There is no need to wait for the |
| 525 | # completion of the connection. |
Victor Stinner | 41063d2 | 2015-01-26 22:30:49 +0100 | [diff] [blame] | 526 | return self._result(pipe) |
Guido van Rossum | a8d630a | 2013-11-01 14:20:55 -0700 | [diff] [blame] | 527 | |
Victor Stinner | c89c8a7 | 2014-02-26 17:35:30 +0100 | [diff] [blame] | 528 | def finish_accept_pipe(trans, key, ov): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 529 | ov.getresult() |
| 530 | return pipe |
Guido van Rossum | a8d630a | 2013-11-01 14:20:55 -0700 | [diff] [blame] | 531 | |
Victor Stinner | 2b77c54 | 2015-01-22 23:50:03 +0100 | [diff] [blame] | 532 | return self._register(ov, pipe, finish_accept_pipe) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 533 | |
Victor Stinner | e0fd157 | 2015-01-26 15:04:03 +0100 | [diff] [blame] | 534 | @coroutine |
Victor Stinner | 7ffa2c5 | 2015-01-22 22:55:08 +0100 | [diff] [blame] | 535 | def connect_pipe(self, address): |
Victor Stinner | e0fd157 | 2015-01-26 15:04:03 +0100 | [diff] [blame] | 536 | delay = CONNECT_PIPE_INIT_DELAY |
| 537 | while True: |
| 538 | # Unfortunately there is no way to do an overlapped connect to a pipe. |
| 539 | # Call CreateFile() in a loop until it doesn't fail with |
| 540 | # ERROR_PIPE_BUSY |
| 541 | try: |
| 542 | handle = _overlapped.ConnectPipe(address) |
| 543 | break |
| 544 | except OSError as exc: |
| 545 | if exc.winerror != _overlapped.ERROR_PIPE_BUSY: |
| 546 | raise |
| 547 | |
| 548 | # ConnectPipe() failed with ERROR_PIPE_BUSY: retry later |
| 549 | delay = min(delay * 2, CONNECT_PIPE_MAX_DELAY) |
| 550 | yield from tasks.sleep(delay, loop=self._loop) |
| 551 | |
| 552 | return windows_utils.PipeHandle(handle) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 553 | |
Guido van Rossum | 90fb914 | 2013-10-30 14:44:05 -0700 | [diff] [blame] | 554 | def wait_for_handle(self, handle, timeout=None): |
Victor Stinner | 4d825b4 | 2014-12-19 17:10:44 +0100 | [diff] [blame] | 555 | """Wait for a handle. |
| 556 | |
| 557 | Return a Future object. The result of the future is True if the wait |
| 558 | completed, or False if the wait did not complete (on timeout). |
| 559 | """ |
Victor Stinner | d0a28de | 2015-01-21 23:39:51 +0100 | [diff] [blame] | 560 | return self._wait_for_handle(handle, timeout, False) |
| 561 | |
| 562 | def _wait_cancel(self, event, done_callback): |
| 563 | fut = self._wait_for_handle(event, None, True) |
| 564 | # add_done_callback() cannot be used because the wait may only complete |
| 565 | # in IocpProactor.close(), while the event loop is not running. |
| 566 | fut._done_callback = done_callback |
| 567 | return fut |
| 568 | |
| 569 | def _wait_for_handle(self, handle, timeout, _is_cancel): |
Guido van Rossum | 90fb914 | 2013-10-30 14:44:05 -0700 | [diff] [blame] | 570 | if timeout is None: |
| 571 | ms = _winapi.INFINITE |
| 572 | else: |
Victor Stinner | f2e1768 | 2014-01-31 16:25:24 +0100 | [diff] [blame] | 573 | # RegisterWaitForSingleObject() has a resolution of 1 millisecond, |
| 574 | # round away from zero to wait *at least* timeout seconds. |
| 575 | ms = math.ceil(timeout * 1e3) |
Guido van Rossum | 90fb914 | 2013-10-30 14:44:05 -0700 | [diff] [blame] | 576 | |
| 577 | # We only create ov so we can use ov.address as a key for the cache. |
| 578 | ov = _overlapped.Overlapped(NULL) |
Victor Stinner | d0a28de | 2015-01-21 23:39:51 +0100 | [diff] [blame] | 579 | wait_handle = _overlapped.RegisterWaitWithQueue( |
Guido van Rossum | 90fb914 | 2013-10-30 14:44:05 -0700 | [diff] [blame] | 580 | handle, self._iocp, ov.address, ms) |
Victor Stinner | d0a28de | 2015-01-21 23:39:51 +0100 | [diff] [blame] | 581 | if _is_cancel: |
| 582 | f = _WaitCancelFuture(ov, handle, wait_handle, loop=self._loop) |
| 583 | else: |
| 584 | f = _WaitHandleFuture(ov, handle, wait_handle, self, |
| 585 | loop=self._loop) |
Victor Stinner | 313a980 | 2014-07-29 12:58:23 +0200 | [diff] [blame] | 586 | if f._source_traceback: |
| 587 | del f._source_traceback[-1] |
Guido van Rossum | 90fb914 | 2013-10-30 14:44:05 -0700 | [diff] [blame] | 588 | |
Victor Stinner | c89c8a7 | 2014-02-26 17:35:30 +0100 | [diff] [blame] | 589 | def finish_wait_for_handle(trans, key, ov): |
Richard Oudkerk | 71196e7 | 2013-11-24 17:50:40 +0000 | [diff] [blame] | 590 | # Note that this second wait means that we should only use |
| 591 | # this with handles types where a successful wait has no |
| 592 | # effect. So events or processes are all right, but locks |
| 593 | # or semaphores are not. Also note if the handle is |
| 594 | # signalled and then quickly reset, then we may return |
| 595 | # False even though we have not timed out. |
Victor Stinner | 313a980 | 2014-07-29 12:58:23 +0200 | [diff] [blame] | 596 | return f._poll() |
Guido van Rossum | 90fb914 | 2013-10-30 14:44:05 -0700 | [diff] [blame] | 597 | |
Victor Stinner | 313a980 | 2014-07-29 12:58:23 +0200 | [diff] [blame] | 598 | self._cache[ov.address] = (f, ov, 0, finish_wait_for_handle) |
Guido van Rossum | 90fb914 | 2013-10-30 14:44:05 -0700 | [diff] [blame] | 599 | return f |
| 600 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 601 | def _register_with_iocp(self, obj): |
| 602 | # To get notifications of finished ops on this objects sent to the |
| 603 | # completion port, were must register the handle. |
| 604 | if obj not in self._registered: |
| 605 | self._registered.add(obj) |
| 606 | _overlapped.CreateIoCompletionPort(obj.fileno(), self._iocp, 0, 0) |
| 607 | # XXX We could also use SetFileCompletionNotificationModes() |
| 608 | # to avoid sending notifications to completion port of ops |
| 609 | # that succeed immediately. |
| 610 | |
Victor Stinner | 2b77c54 | 2015-01-22 23:50:03 +0100 | [diff] [blame] | 611 | def _register(self, ov, obj, callback): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 612 | # Return a future which will be set with the result of the |
| 613 | # operation when it completes. The future's value is actually |
| 614 | # the value returned by callback(). |
| 615 | f = _OverlappedFuture(ov, loop=self._loop) |
Victor Stinner | 313a980 | 2014-07-29 12:58:23 +0200 | [diff] [blame] | 616 | if f._source_traceback: |
| 617 | del f._source_traceback[-1] |
Victor Stinner | 2b77c54 | 2015-01-22 23:50:03 +0100 | [diff] [blame] | 618 | if not ov.pending: |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 619 | # The operation has completed, so no need to postpone the |
| 620 | # work. We cannot take this short cut if we need the |
| 621 | # NumberOfBytes, CompletionKey values returned by |
| 622 | # PostQueuedCompletionStatus(). |
| 623 | try: |
| 624 | value = callback(None, None, ov) |
| 625 | except OSError as e: |
| 626 | f.set_exception(e) |
| 627 | else: |
| 628 | f.set_result(value) |
Victor Stinner | 42d3bde | 2014-07-28 00:18:43 +0200 | [diff] [blame] | 629 | # Even if GetOverlappedResult() was called, we have to wait for the |
| 630 | # notification of the completion in GetQueuedCompletionStatus(). |
| 631 | # Register the overlapped operation to keep a reference to the |
| 632 | # OVERLAPPED object, otherwise the memory is freed and Windows may |
| 633 | # read uninitialized memory. |
Victor Stinner | 2b77c54 | 2015-01-22 23:50:03 +0100 | [diff] [blame] | 634 | |
| 635 | # Register the overlapped operation for later. Note that |
| 636 | # we only store obj to prevent it from being garbage |
| 637 | # collected too early. |
| 638 | self._cache[ov.address] = (f, ov, obj, callback) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 639 | return f |
| 640 | |
Victor Stinner | d0a28de | 2015-01-21 23:39:51 +0100 | [diff] [blame] | 641 | def _unregister(self, ov): |
| 642 | """Unregister an overlapped object. |
| 643 | |
| 644 | Call this method when its future has been cancelled. The event can |
| 645 | already be signalled (pending in the proactor event queue). It is also |
| 646 | safe if the event is never signalled (because it was cancelled). |
| 647 | """ |
| 648 | self._unregistered.append(ov) |
| 649 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 650 | def _get_accept_socket(self, family): |
| 651 | s = socket.socket(family) |
| 652 | s.settimeout(0) |
| 653 | return s |
| 654 | |
| 655 | def _poll(self, timeout=None): |
| 656 | if timeout is None: |
| 657 | ms = INFINITE |
| 658 | elif timeout < 0: |
| 659 | raise ValueError("negative timeout") |
| 660 | else: |
Victor Stinner | f2e1768 | 2014-01-31 16:25:24 +0100 | [diff] [blame] | 661 | # GetQueuedCompletionStatus() has a resolution of 1 millisecond, |
| 662 | # round away from zero to wait *at least* timeout seconds. |
| 663 | ms = math.ceil(timeout * 1e3) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 664 | if ms >= INFINITE: |
| 665 | raise ValueError("timeout too big") |
Victor Stinner | 313a980 | 2014-07-29 12:58:23 +0200 | [diff] [blame] | 666 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 667 | while True: |
| 668 | status = _overlapped.GetQueuedCompletionStatus(self._iocp, ms) |
| 669 | if status is None: |
Victor Stinner | d0a28de | 2015-01-21 23:39:51 +0100 | [diff] [blame] | 670 | break |
Victor Stinner | 313a980 | 2014-07-29 12:58:23 +0200 | [diff] [blame] | 671 | ms = 0 |
| 672 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 673 | err, transferred, key, address = status |
| 674 | try: |
| 675 | f, ov, obj, callback = self._cache.pop(address) |
| 676 | except KeyError: |
Victor Stinner | 42d3bde | 2014-07-28 00:18:43 +0200 | [diff] [blame] | 677 | if self._loop.get_debug(): |
| 678 | self._loop.call_exception_handler({ |
| 679 | 'message': ('GetQueuedCompletionStatus() returned an ' |
| 680 | 'unexpected event'), |
| 681 | 'status': ('err=%s transferred=%s key=%#x address=%#x' |
| 682 | % (err, transferred, key, address)), |
| 683 | }) |
| 684 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 685 | # key is either zero, or it is used to return a pipe |
| 686 | # handle which should be closed to avoid a leak. |
| 687 | if key not in (0, _overlapped.INVALID_HANDLE_VALUE): |
| 688 | _winapi.CloseHandle(key) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 689 | continue |
Victor Stinner | 51e44ea | 2014-07-26 00:58:34 +0200 | [diff] [blame] | 690 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 691 | if obj in self._stopped_serving: |
| 692 | f.cancel() |
Victor Stinner | 42d3bde | 2014-07-28 00:18:43 +0200 | [diff] [blame] | 693 | # Don't call the callback if _register() already read the result or |
| 694 | # if the overlapped has been cancelled |
| 695 | elif not f.done(): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 696 | try: |
| 697 | value = callback(transferred, key, ov) |
| 698 | except OSError as e: |
| 699 | f.set_exception(e) |
| 700 | self._results.append(f) |
| 701 | else: |
| 702 | f.set_result(value) |
| 703 | self._results.append(f) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 704 | |
Victor Stinner | d0a28de | 2015-01-21 23:39:51 +0100 | [diff] [blame] | 705 | # Remove unregisted futures |
| 706 | for ov in self._unregistered: |
| 707 | self._cache.pop(ov.address, None) |
| 708 | self._unregistered.clear() |
| 709 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 710 | def _stop_serving(self, obj): |
| 711 | # obj is a socket or pipe handle. It will be closed in |
| 712 | # BaseProactorEventLoop._stop_serving() which will make any |
| 713 | # pending operations fail quickly. |
| 714 | self._stopped_serving.add(obj) |
| 715 | |
| 716 | def close(self): |
| 717 | # Cancel remaining registered operations. |
Victor Stinner | fea6a10 | 2014-07-25 00:54:53 +0200 | [diff] [blame] | 718 | for address, (fut, ov, obj, callback) in list(self._cache.items()): |
Victor Stinner | 3d2256f | 2015-01-26 11:02:59 +0100 | [diff] [blame] | 719 | if fut.cancelled(): |
Victor Stinner | 752aba7 | 2015-01-22 22:47:13 +0100 | [diff] [blame] | 720 | # Nothing to do with cancelled futures |
| 721 | pass |
Victor Stinner | 1ca9392 | 2015-01-22 00:17:54 +0100 | [diff] [blame] | 722 | elif isinstance(fut, _WaitCancelFuture): |
| 723 | # _WaitCancelFuture must not be cancelled |
| 724 | pass |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 725 | else: |
| 726 | try: |
Victor Stinner | fea6a10 | 2014-07-25 00:54:53 +0200 | [diff] [blame] | 727 | fut.cancel() |
| 728 | except OSError as exc: |
| 729 | if self._loop is not None: |
| 730 | context = { |
| 731 | 'message': 'Cancelling a future failed', |
| 732 | 'exception': exc, |
| 733 | 'future': fut, |
| 734 | } |
| 735 | if fut._source_traceback: |
| 736 | context['source_traceback'] = fut._source_traceback |
| 737 | self._loop.call_exception_handler(context) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 738 | |
| 739 | while self._cache: |
| 740 | if not self._poll(1): |
Guido van Rossum | fc29e0f | 2013-10-17 15:39:45 -0700 | [diff] [blame] | 741 | logger.debug('taking long time to close proactor') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 742 | |
| 743 | self._results = [] |
| 744 | if self._iocp is not None: |
| 745 | _winapi.CloseHandle(self._iocp) |
| 746 | self._iocp = None |
Guido van Rossum | 5969128 | 2013-10-30 14:52:03 -0700 | [diff] [blame] | 747 | |
Victor Stinner | fea6a10 | 2014-07-25 00:54:53 +0200 | [diff] [blame] | 748 | def __del__(self): |
| 749 | self.close() |
| 750 | |
Guido van Rossum | 5969128 | 2013-10-30 14:52:03 -0700 | [diff] [blame] | 751 | |
| 752 | class _WindowsSubprocessTransport(base_subprocess.BaseSubprocessTransport): |
| 753 | |
| 754 | def _start(self, args, shell, stdin, stdout, stderr, bufsize, **kwargs): |
| 755 | self._proc = windows_utils.Popen( |
| 756 | args, shell=shell, stdin=stdin, stdout=stdout, stderr=stderr, |
| 757 | bufsize=bufsize, **kwargs) |
Guido van Rossum | a8d630a | 2013-11-01 14:20:55 -0700 | [diff] [blame] | 758 | |
Guido van Rossum | 5969128 | 2013-10-30 14:52:03 -0700 | [diff] [blame] | 759 | def callback(f): |
| 760 | returncode = self._proc.poll() |
| 761 | self._process_exited(returncode) |
Guido van Rossum | a8d630a | 2013-11-01 14:20:55 -0700 | [diff] [blame] | 762 | |
Guido van Rossum | 5969128 | 2013-10-30 14:52:03 -0700 | [diff] [blame] | 763 | f = self._loop._proactor.wait_for_handle(int(self._proc._handle)) |
| 764 | f.add_done_callback(callback) |
Guido van Rossum | 0eaa5ac | 2013-11-04 15:50:46 -0800 | [diff] [blame] | 765 | |
| 766 | |
| 767 | SelectorEventLoop = _WindowsSelectorEventLoop |
| 768 | |
| 769 | |
| 770 | class _WindowsDefaultEventLoopPolicy(events.BaseDefaultEventLoopPolicy): |
| 771 | _loop_factory = SelectorEventLoop |
| 772 | |
| 773 | |
| 774 | DefaultEventLoopPolicy = _WindowsDefaultEventLoopPolicy |