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 | |
| 32 | |
| 33 | class _OverlappedFuture(futures.Future): |
| 34 | """Subclass of Future which represents an overlapped operation. |
| 35 | |
| 36 | Cancelling it will immediately cancel the overlapped operation. |
| 37 | """ |
| 38 | |
| 39 | def __init__(self, ov, *, loop=None): |
| 40 | super().__init__(loop=loop) |
Victor Stinner | fea6a10 | 2014-07-25 00:54:53 +0200 | [diff] [blame] | 41 | if self._source_traceback: |
| 42 | del self._source_traceback[-1] |
Victor Stinner | 18a28dc | 2014-07-25 13:05:20 +0200 | [diff] [blame] | 43 | self._ov = ov |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 44 | |
Victor Stinner | 313a980 | 2014-07-29 12:58:23 +0200 | [diff] [blame] | 45 | def _repr_info(self): |
| 46 | info = super()._repr_info() |
Victor Stinner | 18a28dc | 2014-07-25 13:05:20 +0200 | [diff] [blame] | 47 | if self._ov is not None: |
| 48 | state = 'pending' if self._ov.pending else 'completed' |
Victor Stinner | 313a980 | 2014-07-29 12:58:23 +0200 | [diff] [blame] | 49 | info.insert(1, 'overlapped=<%s, %#x>' % (state, self._ov.address)) |
| 50 | return info |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 51 | |
Victor Stinner | 18a28dc | 2014-07-25 13:05:20 +0200 | [diff] [blame] | 52 | def _cancel_overlapped(self): |
| 53 | if self._ov is None: |
| 54 | return |
| 55 | try: |
| 56 | self._ov.cancel() |
| 57 | except OSError as exc: |
| 58 | context = { |
| 59 | 'message': 'Cancelling an overlapped future failed', |
| 60 | 'exception': exc, |
| 61 | 'future': self, |
| 62 | } |
| 63 | if self._source_traceback: |
| 64 | context['source_traceback'] = self._source_traceback |
| 65 | self._loop.call_exception_handler(context) |
| 66 | self._ov = None |
| 67 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 68 | def cancel(self): |
Victor Stinner | 18a28dc | 2014-07-25 13:05:20 +0200 | [diff] [blame] | 69 | self._cancel_overlapped() |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 70 | return super().cancel() |
| 71 | |
Victor Stinner | 18a28dc | 2014-07-25 13:05:20 +0200 | [diff] [blame] | 72 | def set_exception(self, exception): |
| 73 | super().set_exception(exception) |
| 74 | self._cancel_overlapped() |
| 75 | |
Victor Stinner | 51e44ea | 2014-07-26 00:58:34 +0200 | [diff] [blame] | 76 | def set_result(self, result): |
| 77 | super().set_result(result) |
| 78 | self._ov = None |
| 79 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 80 | |
Guido van Rossum | 90fb914 | 2013-10-30 14:44:05 -0700 | [diff] [blame] | 81 | class _WaitHandleFuture(futures.Future): |
| 82 | """Subclass of Future which represents a wait handle.""" |
| 83 | |
Victor Stinner | 313a980 | 2014-07-29 12:58:23 +0200 | [diff] [blame] | 84 | def __init__(self, iocp, ov, handle, wait_handle, *, loop=None): |
Guido van Rossum | 90fb914 | 2013-10-30 14:44:05 -0700 | [diff] [blame] | 85 | super().__init__(loop=loop) |
Victor Stinner | 313a980 | 2014-07-29 12:58:23 +0200 | [diff] [blame] | 86 | if self._source_traceback: |
| 87 | del self._source_traceback[-1] |
| 88 | # iocp and ov are only used by cancel() to notify IocpProactor |
| 89 | # that the wait was cancelled |
| 90 | self._iocp = iocp |
| 91 | self._ov = ov |
Victor Stinner | 18a28dc | 2014-07-25 13:05:20 +0200 | [diff] [blame] | 92 | self._handle = handle |
Guido van Rossum | 90fb914 | 2013-10-30 14:44:05 -0700 | [diff] [blame] | 93 | self._wait_handle = wait_handle |
| 94 | |
Victor Stinner | 18a28dc | 2014-07-25 13:05:20 +0200 | [diff] [blame] | 95 | def _poll(self): |
| 96 | # non-blocking wait: use a timeout of 0 millisecond |
| 97 | return (_winapi.WaitForSingleObject(self._handle, 0) == |
| 98 | _winapi.WAIT_OBJECT_0) |
| 99 | |
Victor Stinner | 313a980 | 2014-07-29 12:58:23 +0200 | [diff] [blame] | 100 | def _repr_info(self): |
| 101 | info = super()._repr_info() |
| 102 | info.insert(1, 'handle=%#x' % self._handle) |
Victor Stinner | 18a28dc | 2014-07-25 13:05:20 +0200 | [diff] [blame] | 103 | if self._wait_handle: |
Victor Stinner | 313a980 | 2014-07-29 12:58:23 +0200 | [diff] [blame] | 104 | state = 'signaled' if self._poll() else 'waiting' |
| 105 | info.insert(1, 'wait_handle=<%s, %#x>' |
| 106 | % (state, self._wait_handle)) |
| 107 | return info |
Victor Stinner | 18a28dc | 2014-07-25 13:05:20 +0200 | [diff] [blame] | 108 | |
Victor Stinner | 313a980 | 2014-07-29 12:58:23 +0200 | [diff] [blame] | 109 | def _unregister_wait(self): |
Victor Stinner | fea6a10 | 2014-07-25 00:54:53 +0200 | [diff] [blame] | 110 | if self._wait_handle is None: |
| 111 | return |
Guido van Rossum | 90fb914 | 2013-10-30 14:44:05 -0700 | [diff] [blame] | 112 | try: |
| 113 | _overlapped.UnregisterWait(self._wait_handle) |
Victor Stinner | b261475 | 2014-08-25 23:20:52 +0200 | [diff] [blame^] | 114 | except OSError as exc: |
Victor Stinner | fea6a10 | 2014-07-25 00:54:53 +0200 | [diff] [blame] | 115 | # ERROR_IO_PENDING is not an error, the wait was unregistered |
Victor Stinner | b261475 | 2014-08-25 23:20:52 +0200 | [diff] [blame^] | 116 | if exc.winerror != _overlapped.ERROR_IO_PENDING: |
| 117 | context = { |
| 118 | 'message': 'Failed to unregister the wait handle', |
| 119 | 'exception': exc, |
| 120 | 'future': self, |
| 121 | } |
| 122 | if self._source_traceback: |
| 123 | context['source_traceback'] = self._source_traceback |
| 124 | self._loop.call_exception_handler(context) |
Victor Stinner | fea6a10 | 2014-07-25 00:54:53 +0200 | [diff] [blame] | 125 | self._wait_handle = None |
Victor Stinner | 313a980 | 2014-07-29 12:58:23 +0200 | [diff] [blame] | 126 | self._iocp = None |
| 127 | self._ov = None |
Victor Stinner | fea6a10 | 2014-07-25 00:54:53 +0200 | [diff] [blame] | 128 | |
| 129 | def cancel(self): |
Victor Stinner | 313a980 | 2014-07-29 12:58:23 +0200 | [diff] [blame] | 130 | result = super().cancel() |
| 131 | if self._ov is not None: |
| 132 | # signal the cancellation to the overlapped object |
| 133 | _overlapped.PostQueuedCompletionStatus(self._iocp, True, |
| 134 | 0, self._ov.address) |
| 135 | self._unregister_wait() |
| 136 | return result |
| 137 | |
| 138 | def set_exception(self, exception): |
| 139 | super().set_exception(exception) |
| 140 | self._unregister_wait() |
| 141 | |
| 142 | def set_result(self, result): |
| 143 | super().set_result(result) |
| 144 | self._unregister_wait() |
Guido van Rossum | 90fb914 | 2013-10-30 14:44:05 -0700 | [diff] [blame] | 145 | |
| 146 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 147 | class PipeServer(object): |
| 148 | """Class representing a pipe server. |
| 149 | |
| 150 | This is much like a bound, listening socket. |
| 151 | """ |
| 152 | def __init__(self, address): |
| 153 | self._address = address |
| 154 | self._free_instances = weakref.WeakSet() |
Victor Stinner | b261475 | 2014-08-25 23:20:52 +0200 | [diff] [blame^] | 155 | # initialize the pipe attribute before calling _server_pipe_handle() |
| 156 | # because this function can raise an exception and the destructor calls |
| 157 | # the close() method |
| 158 | self._pipe = None |
| 159 | self._accept_pipe_future = None |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 160 | self._pipe = self._server_pipe_handle(True) |
| 161 | |
| 162 | def _get_unconnected_pipe(self): |
| 163 | # Create new instance and return previous one. This ensures |
| 164 | # that (until the server is closed) there is always at least |
| 165 | # one pipe handle for address. Therefore if a client attempt |
| 166 | # to connect it will not fail with FileNotFoundError. |
| 167 | tmp, self._pipe = self._pipe, self._server_pipe_handle(False) |
| 168 | return tmp |
| 169 | |
| 170 | def _server_pipe_handle(self, first): |
| 171 | # Return a wrapper for a new pipe handle. |
| 172 | if self._address is None: |
| 173 | return None |
| 174 | flags = _winapi.PIPE_ACCESS_DUPLEX | _winapi.FILE_FLAG_OVERLAPPED |
| 175 | if first: |
| 176 | flags |= _winapi.FILE_FLAG_FIRST_PIPE_INSTANCE |
| 177 | h = _winapi.CreateNamedPipe( |
| 178 | self._address, flags, |
| 179 | _winapi.PIPE_TYPE_MESSAGE | _winapi.PIPE_READMODE_MESSAGE | |
| 180 | _winapi.PIPE_WAIT, |
| 181 | _winapi.PIPE_UNLIMITED_INSTANCES, |
| 182 | windows_utils.BUFSIZE, windows_utils.BUFSIZE, |
| 183 | _winapi.NMPWAIT_WAIT_FOREVER, _winapi.NULL) |
| 184 | pipe = windows_utils.PipeHandle(h) |
| 185 | self._free_instances.add(pipe) |
| 186 | return pipe |
| 187 | |
| 188 | def close(self): |
Victor Stinner | b261475 | 2014-08-25 23:20:52 +0200 | [diff] [blame^] | 189 | if self._accept_pipe_future is not None: |
| 190 | self._accept_pipe_future.cancel() |
| 191 | self._accept_pipe_future = None |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 192 | # Close all instances which have not been connected to by a client. |
| 193 | if self._address is not None: |
| 194 | for pipe in self._free_instances: |
| 195 | pipe.close() |
| 196 | self._pipe = None |
| 197 | self._address = None |
| 198 | self._free_instances.clear() |
| 199 | |
| 200 | __del__ = close |
| 201 | |
| 202 | |
Guido van Rossum | 0eaa5ac | 2013-11-04 15:50:46 -0800 | [diff] [blame] | 203 | class _WindowsSelectorEventLoop(selector_events.BaseSelectorEventLoop): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 204 | """Windows version of selector event loop.""" |
| 205 | |
| 206 | def _socketpair(self): |
| 207 | return windows_utils.socketpair() |
| 208 | |
| 209 | |
| 210 | class ProactorEventLoop(proactor_events.BaseProactorEventLoop): |
| 211 | """Windows version of proactor event loop using IOCP.""" |
| 212 | |
| 213 | def __init__(self, proactor=None): |
| 214 | if proactor is None: |
| 215 | proactor = IocpProactor() |
| 216 | super().__init__(proactor) |
| 217 | |
| 218 | def _socketpair(self): |
| 219 | return windows_utils.socketpair() |
| 220 | |
Victor Stinner | f951d28 | 2014-06-29 00:46:45 +0200 | [diff] [blame] | 221 | @coroutine |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 222 | def create_pipe_connection(self, protocol_factory, address): |
| 223 | f = self._proactor.connect_pipe(address) |
| 224 | pipe = yield from f |
| 225 | protocol = protocol_factory() |
| 226 | trans = self._make_duplex_pipe_transport(pipe, protocol, |
| 227 | extra={'addr': address}) |
| 228 | return trans, protocol |
| 229 | |
Victor Stinner | f951d28 | 2014-06-29 00:46:45 +0200 | [diff] [blame] | 230 | @coroutine |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 231 | def start_serving_pipe(self, protocol_factory, address): |
| 232 | server = PipeServer(address) |
Guido van Rossum | a8d630a | 2013-11-01 14:20:55 -0700 | [diff] [blame] | 233 | |
Victor Stinner | b261475 | 2014-08-25 23:20:52 +0200 | [diff] [blame^] | 234 | def loop_accept_pipe(f=None): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 235 | pipe = None |
| 236 | try: |
| 237 | if f: |
| 238 | pipe = f.result() |
| 239 | server._free_instances.discard(pipe) |
| 240 | protocol = protocol_factory() |
| 241 | self._make_duplex_pipe_transport( |
| 242 | pipe, protocol, extra={'addr': address}) |
| 243 | pipe = server._get_unconnected_pipe() |
| 244 | if pipe is None: |
| 245 | return |
| 246 | f = self._proactor.accept_pipe(pipe) |
Yury Selivanov | ff827f0 | 2014-02-18 18:02:19 -0500 | [diff] [blame] | 247 | except OSError as exc: |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 248 | if pipe and pipe.fileno() != -1: |
Yury Selivanov | ff827f0 | 2014-02-18 18:02:19 -0500 | [diff] [blame] | 249 | self.call_exception_handler({ |
| 250 | 'message': 'Pipe accept failed', |
| 251 | 'exception': exc, |
| 252 | 'pipe': pipe, |
| 253 | }) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 254 | pipe.close() |
Victor Stinner | b261475 | 2014-08-25 23:20:52 +0200 | [diff] [blame^] | 255 | elif self._debug: |
| 256 | logger.warning("Accept pipe failed on pipe %r", |
| 257 | pipe, exc_info=True) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 258 | except futures.CancelledError: |
| 259 | if pipe: |
| 260 | pipe.close() |
| 261 | else: |
Victor Stinner | b261475 | 2014-08-25 23:20:52 +0200 | [diff] [blame^] | 262 | server._accept_pipe_future = f |
| 263 | f.add_done_callback(loop_accept_pipe) |
Guido van Rossum | a8d630a | 2013-11-01 14:20:55 -0700 | [diff] [blame] | 264 | |
Victor Stinner | b261475 | 2014-08-25 23:20:52 +0200 | [diff] [blame^] | 265 | self.call_soon(loop_accept_pipe) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 266 | return [server] |
| 267 | |
Victor Stinner | f951d28 | 2014-06-29 00:46:45 +0200 | [diff] [blame] | 268 | @coroutine |
Guido van Rossum | 5969128 | 2013-10-30 14:52:03 -0700 | [diff] [blame] | 269 | def _make_subprocess_transport(self, protocol, args, shell, |
| 270 | stdin, stdout, stderr, bufsize, |
| 271 | extra=None, **kwargs): |
| 272 | transp = _WindowsSubprocessTransport(self, protocol, args, shell, |
| 273 | stdin, stdout, stderr, bufsize, |
Victor Stinner | 73f10fd | 2014-01-29 14:32:20 -0800 | [diff] [blame] | 274 | extra=extra, **kwargs) |
Guido van Rossum | 5969128 | 2013-10-30 14:52:03 -0700 | [diff] [blame] | 275 | yield from transp._post_init() |
| 276 | return transp |
| 277 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 278 | |
| 279 | class IocpProactor: |
| 280 | """Proactor implementation using IOCP.""" |
| 281 | |
| 282 | def __init__(self, concurrency=0xffffffff): |
| 283 | self._loop = None |
| 284 | self._results = [] |
| 285 | self._iocp = _overlapped.CreateIoCompletionPort( |
| 286 | _overlapped.INVALID_HANDLE_VALUE, NULL, 0, concurrency) |
| 287 | self._cache = {} |
| 288 | self._registered = weakref.WeakSet() |
| 289 | self._stopped_serving = weakref.WeakSet() |
| 290 | |
Victor Stinner | fea6a10 | 2014-07-25 00:54:53 +0200 | [diff] [blame] | 291 | def __repr__(self): |
| 292 | return ('<%s overlapped#=%s result#=%s>' |
| 293 | % (self.__class__.__name__, len(self._cache), |
| 294 | len(self._results))) |
| 295 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 296 | def set_loop(self, loop): |
| 297 | self._loop = loop |
| 298 | |
| 299 | def select(self, timeout=None): |
| 300 | if not self._results: |
| 301 | self._poll(timeout) |
| 302 | tmp = self._results |
| 303 | self._results = [] |
| 304 | return tmp |
| 305 | |
| 306 | def recv(self, conn, nbytes, flags=0): |
| 307 | self._register_with_iocp(conn) |
| 308 | ov = _overlapped.Overlapped(NULL) |
| 309 | if isinstance(conn, socket.socket): |
| 310 | ov.WSARecv(conn.fileno(), nbytes, flags) |
| 311 | else: |
| 312 | ov.ReadFile(conn.fileno(), nbytes) |
Guido van Rossum | a8d630a | 2013-11-01 14:20:55 -0700 | [diff] [blame] | 313 | |
Victor Stinner | c89c8a7 | 2014-02-26 17:35:30 +0100 | [diff] [blame] | 314 | def finish_recv(trans, key, ov): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 315 | try: |
| 316 | return ov.getresult() |
| 317 | except OSError as exc: |
| 318 | if exc.winerror == _overlapped.ERROR_NETNAME_DELETED: |
| 319 | raise ConnectionResetError(*exc.args) |
| 320 | else: |
| 321 | raise |
Guido van Rossum | a8d630a | 2013-11-01 14:20:55 -0700 | [diff] [blame] | 322 | |
Victor Stinner | c89c8a7 | 2014-02-26 17:35:30 +0100 | [diff] [blame] | 323 | return self._register(ov, conn, finish_recv) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 324 | |
| 325 | def send(self, conn, buf, flags=0): |
| 326 | self._register_with_iocp(conn) |
| 327 | ov = _overlapped.Overlapped(NULL) |
| 328 | if isinstance(conn, socket.socket): |
| 329 | ov.WSASend(conn.fileno(), buf, flags) |
| 330 | else: |
| 331 | ov.WriteFile(conn.fileno(), buf) |
Guido van Rossum | a8d630a | 2013-11-01 14:20:55 -0700 | [diff] [blame] | 332 | |
Victor Stinner | c89c8a7 | 2014-02-26 17:35:30 +0100 | [diff] [blame] | 333 | def finish_send(trans, key, ov): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 334 | try: |
| 335 | return ov.getresult() |
| 336 | except OSError as exc: |
| 337 | if exc.winerror == _overlapped.ERROR_NETNAME_DELETED: |
| 338 | raise ConnectionResetError(*exc.args) |
| 339 | else: |
| 340 | raise |
Guido van Rossum | a8d630a | 2013-11-01 14:20:55 -0700 | [diff] [blame] | 341 | |
Victor Stinner | c89c8a7 | 2014-02-26 17:35:30 +0100 | [diff] [blame] | 342 | return self._register(ov, conn, finish_send) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 343 | |
| 344 | def accept(self, listener): |
| 345 | self._register_with_iocp(listener) |
| 346 | conn = self._get_accept_socket(listener.family) |
| 347 | ov = _overlapped.Overlapped(NULL) |
| 348 | ov.AcceptEx(listener.fileno(), conn.fileno()) |
Guido van Rossum | a8d630a | 2013-11-01 14:20:55 -0700 | [diff] [blame] | 349 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 350 | def finish_accept(trans, key, ov): |
| 351 | ov.getresult() |
| 352 | # Use SO_UPDATE_ACCEPT_CONTEXT so getsockname() etc work. |
| 353 | buf = struct.pack('@P', listener.fileno()) |
| 354 | conn.setsockopt(socket.SOL_SOCKET, |
| 355 | _overlapped.SO_UPDATE_ACCEPT_CONTEXT, buf) |
| 356 | conn.settimeout(listener.gettimeout()) |
| 357 | return conn, conn.getpeername() |
Guido van Rossum | a8d630a | 2013-11-01 14:20:55 -0700 | [diff] [blame] | 358 | |
Victor Stinner | f951d28 | 2014-06-29 00:46:45 +0200 | [diff] [blame] | 359 | @coroutine |
Victor Stinner | 7de2646 | 2014-01-11 00:03:21 +0100 | [diff] [blame] | 360 | def accept_coro(future, conn): |
| 361 | # Coroutine closing the accept socket if the future is cancelled |
| 362 | try: |
| 363 | yield from future |
| 364 | except futures.CancelledError: |
| 365 | conn.close() |
| 366 | raise |
| 367 | |
| 368 | future = self._register(ov, listener, finish_accept) |
| 369 | coro = accept_coro(future, conn) |
| 370 | tasks.async(coro, loop=self._loop) |
| 371 | return future |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 372 | |
| 373 | def connect(self, conn, address): |
| 374 | self._register_with_iocp(conn) |
| 375 | # The socket needs to be locally bound before we call ConnectEx(). |
| 376 | try: |
| 377 | _overlapped.BindLocal(conn.fileno(), conn.family) |
| 378 | except OSError as e: |
| 379 | if e.winerror != errno.WSAEINVAL: |
| 380 | raise |
| 381 | # Probably already locally bound; check using getsockname(). |
| 382 | if conn.getsockname()[1] == 0: |
| 383 | raise |
| 384 | ov = _overlapped.Overlapped(NULL) |
| 385 | ov.ConnectEx(conn.fileno(), address) |
Guido van Rossum | a8d630a | 2013-11-01 14:20:55 -0700 | [diff] [blame] | 386 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 387 | def finish_connect(trans, key, ov): |
| 388 | ov.getresult() |
| 389 | # Use SO_UPDATE_CONNECT_CONTEXT so getsockname() etc work. |
| 390 | conn.setsockopt(socket.SOL_SOCKET, |
| 391 | _overlapped.SO_UPDATE_CONNECT_CONTEXT, 0) |
| 392 | return conn |
Guido van Rossum | a8d630a | 2013-11-01 14:20:55 -0700 | [diff] [blame] | 393 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 394 | return self._register(ov, conn, finish_connect) |
| 395 | |
| 396 | def accept_pipe(self, pipe): |
| 397 | self._register_with_iocp(pipe) |
| 398 | ov = _overlapped.Overlapped(NULL) |
| 399 | ov.ConnectNamedPipe(pipe.fileno()) |
Guido van Rossum | a8d630a | 2013-11-01 14:20:55 -0700 | [diff] [blame] | 400 | |
Victor Stinner | c89c8a7 | 2014-02-26 17:35:30 +0100 | [diff] [blame] | 401 | def finish_accept_pipe(trans, key, ov): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 402 | ov.getresult() |
| 403 | return pipe |
Guido van Rossum | a8d630a | 2013-11-01 14:20:55 -0700 | [diff] [blame] | 404 | |
Victor Stinner | 42d3bde | 2014-07-28 00:18:43 +0200 | [diff] [blame] | 405 | # FIXME: Tulip issue 196: why to we neeed register=False? |
| 406 | # See also the comment in the _register() method |
| 407 | return self._register(ov, pipe, finish_accept_pipe, |
| 408 | register=False) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 409 | |
| 410 | def connect_pipe(self, address): |
| 411 | ov = _overlapped.Overlapped(NULL) |
| 412 | ov.WaitNamedPipeAndConnect(address, self._iocp, ov.address) |
Guido van Rossum | a8d630a | 2013-11-01 14:20:55 -0700 | [diff] [blame] | 413 | |
Victor Stinner | c89c8a7 | 2014-02-26 17:35:30 +0100 | [diff] [blame] | 414 | def finish_connect_pipe(err, handle, ov): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 415 | # err, handle were arguments passed to PostQueuedCompletionStatus() |
| 416 | # in a function run in a thread pool. |
| 417 | if err == _overlapped.ERROR_SEM_TIMEOUT: |
| 418 | # Connection did not succeed within time limit. |
| 419 | msg = _overlapped.FormatMessage(err) |
| 420 | raise ConnectionRefusedError(0, msg, None, err) |
| 421 | elif err != 0: |
| 422 | msg = _overlapped.FormatMessage(err) |
| 423 | raise OSError(0, msg, None, err) |
| 424 | else: |
| 425 | return windows_utils.PipeHandle(handle) |
Guido van Rossum | a8d630a | 2013-11-01 14:20:55 -0700 | [diff] [blame] | 426 | |
Victor Stinner | c89c8a7 | 2014-02-26 17:35:30 +0100 | [diff] [blame] | 427 | return self._register(ov, None, finish_connect_pipe, wait_for_post=True) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 428 | |
Guido van Rossum | 90fb914 | 2013-10-30 14:44:05 -0700 | [diff] [blame] | 429 | def wait_for_handle(self, handle, timeout=None): |
| 430 | if timeout is None: |
| 431 | ms = _winapi.INFINITE |
| 432 | else: |
Victor Stinner | f2e1768 | 2014-01-31 16:25:24 +0100 | [diff] [blame] | 433 | # RegisterWaitForSingleObject() has a resolution of 1 millisecond, |
| 434 | # round away from zero to wait *at least* timeout seconds. |
| 435 | ms = math.ceil(timeout * 1e3) |
Guido van Rossum | 90fb914 | 2013-10-30 14:44:05 -0700 | [diff] [blame] | 436 | |
| 437 | # We only create ov so we can use ov.address as a key for the cache. |
| 438 | ov = _overlapped.Overlapped(NULL) |
| 439 | wh = _overlapped.RegisterWaitWithQueue( |
| 440 | handle, self._iocp, ov.address, ms) |
Victor Stinner | 313a980 | 2014-07-29 12:58:23 +0200 | [diff] [blame] | 441 | f = _WaitHandleFuture(self._iocp, ov, handle, wh, loop=self._loop) |
| 442 | if f._source_traceback: |
| 443 | del f._source_traceback[-1] |
Guido van Rossum | 90fb914 | 2013-10-30 14:44:05 -0700 | [diff] [blame] | 444 | |
Victor Stinner | c89c8a7 | 2014-02-26 17:35:30 +0100 | [diff] [blame] | 445 | def finish_wait_for_handle(trans, key, ov): |
Richard Oudkerk | 71196e7 | 2013-11-24 17:50:40 +0000 | [diff] [blame] | 446 | # Note that this second wait means that we should only use |
| 447 | # this with handles types where a successful wait has no |
| 448 | # effect. So events or processes are all right, but locks |
| 449 | # or semaphores are not. Also note if the handle is |
| 450 | # signalled and then quickly reset, then we may return |
| 451 | # False even though we have not timed out. |
Victor Stinner | 313a980 | 2014-07-29 12:58:23 +0200 | [diff] [blame] | 452 | return f._poll() |
Guido van Rossum | 90fb914 | 2013-10-30 14:44:05 -0700 | [diff] [blame] | 453 | |
Victor Stinner | 313a980 | 2014-07-29 12:58:23 +0200 | [diff] [blame] | 454 | if f._poll(): |
| 455 | try: |
| 456 | result = f._poll() |
| 457 | except OSError as exc: |
| 458 | f.set_exception(exc) |
| 459 | else: |
| 460 | f.set_result(result) |
| 461 | |
| 462 | self._cache[ov.address] = (f, ov, 0, finish_wait_for_handle) |
Guido van Rossum | 90fb914 | 2013-10-30 14:44:05 -0700 | [diff] [blame] | 463 | return f |
| 464 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 465 | def _register_with_iocp(self, obj): |
| 466 | # To get notifications of finished ops on this objects sent to the |
| 467 | # completion port, were must register the handle. |
| 468 | if obj not in self._registered: |
| 469 | self._registered.add(obj) |
| 470 | _overlapped.CreateIoCompletionPort(obj.fileno(), self._iocp, 0, 0) |
| 471 | # XXX We could also use SetFileCompletionNotificationModes() |
| 472 | # to avoid sending notifications to completion port of ops |
| 473 | # that succeed immediately. |
| 474 | |
Victor Stinner | 42d3bde | 2014-07-28 00:18:43 +0200 | [diff] [blame] | 475 | def _register(self, ov, obj, callback, |
| 476 | wait_for_post=False, register=True): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 477 | # Return a future which will be set with the result of the |
| 478 | # operation when it completes. The future's value is actually |
| 479 | # the value returned by callback(). |
| 480 | f = _OverlappedFuture(ov, loop=self._loop) |
Victor Stinner | 313a980 | 2014-07-29 12:58:23 +0200 | [diff] [blame] | 481 | if f._source_traceback: |
| 482 | del f._source_traceback[-1] |
Victor Stinner | 42d3bde | 2014-07-28 00:18:43 +0200 | [diff] [blame] | 483 | if not ov.pending and not wait_for_post: |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 484 | # The operation has completed, so no need to postpone the |
| 485 | # work. We cannot take this short cut if we need the |
| 486 | # NumberOfBytes, CompletionKey values returned by |
| 487 | # PostQueuedCompletionStatus(). |
| 488 | try: |
| 489 | value = callback(None, None, ov) |
| 490 | except OSError as e: |
| 491 | f.set_exception(e) |
| 492 | else: |
| 493 | f.set_result(value) |
Victor Stinner | 42d3bde | 2014-07-28 00:18:43 +0200 | [diff] [blame] | 494 | # Even if GetOverlappedResult() was called, we have to wait for the |
| 495 | # notification of the completion in GetQueuedCompletionStatus(). |
| 496 | # Register the overlapped operation to keep a reference to the |
| 497 | # OVERLAPPED object, otherwise the memory is freed and Windows may |
| 498 | # read uninitialized memory. |
| 499 | # |
| 500 | # For an unknown reason, ConnectNamedPipe() behaves differently: |
| 501 | # the completion is not notified by GetOverlappedResult() if we |
| 502 | # already called GetOverlappedResult(). For this specific case, we |
| 503 | # don't expect notification (register is set to False). |
| 504 | else: |
| 505 | register = True |
| 506 | if register: |
| 507 | # Register the overlapped operation for later. Note that |
| 508 | # we only store obj to prevent it from being garbage |
| 509 | # collected too early. |
| 510 | self._cache[ov.address] = (f, ov, obj, callback) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 511 | return f |
| 512 | |
| 513 | def _get_accept_socket(self, family): |
| 514 | s = socket.socket(family) |
| 515 | s.settimeout(0) |
| 516 | return s |
| 517 | |
| 518 | def _poll(self, timeout=None): |
| 519 | if timeout is None: |
| 520 | ms = INFINITE |
| 521 | elif timeout < 0: |
| 522 | raise ValueError("negative timeout") |
| 523 | else: |
Victor Stinner | f2e1768 | 2014-01-31 16:25:24 +0100 | [diff] [blame] | 524 | # GetQueuedCompletionStatus() has a resolution of 1 millisecond, |
| 525 | # round away from zero to wait *at least* timeout seconds. |
| 526 | ms = math.ceil(timeout * 1e3) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 527 | if ms >= INFINITE: |
| 528 | raise ValueError("timeout too big") |
Victor Stinner | 313a980 | 2014-07-29 12:58:23 +0200 | [diff] [blame] | 529 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 530 | while True: |
| 531 | status = _overlapped.GetQueuedCompletionStatus(self._iocp, ms) |
| 532 | if status is None: |
| 533 | return |
Victor Stinner | 313a980 | 2014-07-29 12:58:23 +0200 | [diff] [blame] | 534 | ms = 0 |
| 535 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 536 | err, transferred, key, address = status |
| 537 | try: |
| 538 | f, ov, obj, callback = self._cache.pop(address) |
| 539 | except KeyError: |
Victor Stinner | 42d3bde | 2014-07-28 00:18:43 +0200 | [diff] [blame] | 540 | if self._loop.get_debug(): |
| 541 | self._loop.call_exception_handler({ |
| 542 | 'message': ('GetQueuedCompletionStatus() returned an ' |
| 543 | 'unexpected event'), |
| 544 | 'status': ('err=%s transferred=%s key=%#x address=%#x' |
| 545 | % (err, transferred, key, address)), |
| 546 | }) |
| 547 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 548 | # key is either zero, or it is used to return a pipe |
| 549 | # handle which should be closed to avoid a leak. |
| 550 | if key not in (0, _overlapped.INVALID_HANDLE_VALUE): |
| 551 | _winapi.CloseHandle(key) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 552 | continue |
Victor Stinner | 51e44ea | 2014-07-26 00:58:34 +0200 | [diff] [blame] | 553 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 554 | if obj in self._stopped_serving: |
| 555 | f.cancel() |
Victor Stinner | 42d3bde | 2014-07-28 00:18:43 +0200 | [diff] [blame] | 556 | # Don't call the callback if _register() already read the result or |
| 557 | # if the overlapped has been cancelled |
| 558 | elif not f.done(): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 559 | try: |
| 560 | value = callback(transferred, key, ov) |
| 561 | except OSError as e: |
| 562 | f.set_exception(e) |
| 563 | self._results.append(f) |
| 564 | else: |
| 565 | f.set_result(value) |
| 566 | self._results.append(f) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 567 | |
| 568 | def _stop_serving(self, obj): |
| 569 | # obj is a socket or pipe handle. It will be closed in |
| 570 | # BaseProactorEventLoop._stop_serving() which will make any |
| 571 | # pending operations fail quickly. |
| 572 | self._stopped_serving.add(obj) |
| 573 | |
| 574 | def close(self): |
| 575 | # Cancel remaining registered operations. |
Victor Stinner | fea6a10 | 2014-07-25 00:54:53 +0200 | [diff] [blame] | 576 | for address, (fut, ov, obj, callback) in list(self._cache.items()): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 577 | if obj is None: |
| 578 | # The operation was started with connect_pipe() which |
| 579 | # queues a task to Windows' thread pool. This cannot |
| 580 | # be cancelled, so just forget it. |
| 581 | del self._cache[address] |
Victor Stinner | 42d3bde | 2014-07-28 00:18:43 +0200 | [diff] [blame] | 582 | # FIXME: Tulip issue 196: remove this case, it should not happen |
| 583 | elif fut.done() and not fut.cancelled(): |
| 584 | del self._cache[address] |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 585 | else: |
| 586 | try: |
Victor Stinner | fea6a10 | 2014-07-25 00:54:53 +0200 | [diff] [blame] | 587 | fut.cancel() |
| 588 | except OSError as exc: |
| 589 | if self._loop is not None: |
| 590 | context = { |
| 591 | 'message': 'Cancelling a future failed', |
| 592 | 'exception': exc, |
| 593 | 'future': fut, |
| 594 | } |
| 595 | if fut._source_traceback: |
| 596 | context['source_traceback'] = fut._source_traceback |
| 597 | self._loop.call_exception_handler(context) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 598 | |
| 599 | while self._cache: |
| 600 | if not self._poll(1): |
Guido van Rossum | fc29e0f | 2013-10-17 15:39:45 -0700 | [diff] [blame] | 601 | logger.debug('taking long time to close proactor') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 602 | |
| 603 | self._results = [] |
| 604 | if self._iocp is not None: |
| 605 | _winapi.CloseHandle(self._iocp) |
| 606 | self._iocp = None |
Guido van Rossum | 5969128 | 2013-10-30 14:52:03 -0700 | [diff] [blame] | 607 | |
Victor Stinner | fea6a10 | 2014-07-25 00:54:53 +0200 | [diff] [blame] | 608 | def __del__(self): |
| 609 | self.close() |
| 610 | |
Guido van Rossum | 5969128 | 2013-10-30 14:52:03 -0700 | [diff] [blame] | 611 | |
| 612 | class _WindowsSubprocessTransport(base_subprocess.BaseSubprocessTransport): |
| 613 | |
| 614 | def _start(self, args, shell, stdin, stdout, stderr, bufsize, **kwargs): |
| 615 | self._proc = windows_utils.Popen( |
| 616 | args, shell=shell, stdin=stdin, stdout=stdout, stderr=stderr, |
| 617 | bufsize=bufsize, **kwargs) |
Guido van Rossum | a8d630a | 2013-11-01 14:20:55 -0700 | [diff] [blame] | 618 | |
Guido van Rossum | 5969128 | 2013-10-30 14:52:03 -0700 | [diff] [blame] | 619 | def callback(f): |
| 620 | returncode = self._proc.poll() |
| 621 | self._process_exited(returncode) |
Guido van Rossum | a8d630a | 2013-11-01 14:20:55 -0700 | [diff] [blame] | 622 | |
Guido van Rossum | 5969128 | 2013-10-30 14:52:03 -0700 | [diff] [blame] | 623 | f = self._loop._proactor.wait_for_handle(int(self._proc._handle)) |
| 624 | f.add_done_callback(callback) |
Guido van Rossum | 0eaa5ac | 2013-11-04 15:50:46 -0800 | [diff] [blame] | 625 | |
| 626 | |
| 627 | SelectorEventLoop = _WindowsSelectorEventLoop |
| 628 | |
| 629 | |
| 630 | class _WindowsDefaultEventLoopPolicy(events.BaseDefaultEventLoopPolicy): |
| 631 | _loop_factory = SelectorEventLoop |
| 632 | |
| 633 | |
| 634 | DefaultEventLoopPolicy = _WindowsDefaultEventLoopPolicy |