diff options
Diffstat (limited to 'Lib/asyncio/selector_events.py')
| -rw-r--r-- | Lib/asyncio/selector_events.py | 127 |
1 files changed, 79 insertions, 48 deletions
diff --git a/Lib/asyncio/selector_events.py b/Lib/asyncio/selector_events.py index 1e16ac6..9dbe550 100644 --- a/Lib/asyncio/selector_events.py +++ b/Lib/asyncio/selector_events.py @@ -11,6 +11,7 @@ import errno import functools import socket import warnings +import weakref try: import ssl except ImportError: # pragma: no cover @@ -64,6 +65,7 @@ class BaseSelectorEventLoop(base_events.BaseEventLoop): logger.debug('Using selector: %s', selector.__class__.__name__) self._selector = selector self._make_self_pipe() + self._transports = weakref.WeakValueDictionary() def _make_socket_transport(self, sock, protocol, waiter=None, *, extra=None, server=None): @@ -115,7 +117,7 @@ class BaseSelectorEventLoop(base_events.BaseEventLoop): raise NotImplementedError def _close_self_pipe(self): - self.remove_reader(self._ssock.fileno()) + self._remove_reader(self._ssock.fileno()) self._ssock.close() self._ssock = None self._csock.close() @@ -128,7 +130,7 @@ class BaseSelectorEventLoop(base_events.BaseEventLoop): self._ssock.setblocking(False) self._csock.setblocking(False) self._internal_fds += 1 - self.add_reader(self._ssock.fileno(), self._read_from_self) + self._add_reader(self._ssock.fileno(), self._read_from_self) def _process_self_data(self, data): pass @@ -163,8 +165,8 @@ class BaseSelectorEventLoop(base_events.BaseEventLoop): def _start_serving(self, protocol_factory, sock, sslcontext=None, server=None, backlog=100): - self.add_reader(sock.fileno(), self._accept_connection, - protocol_factory, sock, sslcontext, server, backlog) + self._add_reader(sock.fileno(), self._accept_connection, + protocol_factory, sock, sslcontext, server, backlog) def _accept_connection(self, protocol_factory, sock, sslcontext=None, server=None, backlog=100): @@ -194,7 +196,7 @@ class BaseSelectorEventLoop(base_events.BaseEventLoop): 'exception': exc, 'socket': sock, }) - self.remove_reader(sock.fileno()) + self._remove_reader(sock.fileno()) self.call_later(constants.ACCEPT_RETRY_DELAY, self._start_serving, protocol_factory, sock, sslcontext, server, @@ -244,8 +246,18 @@ class BaseSelectorEventLoop(base_events.BaseEventLoop): context['transport'] = transport self.call_exception_handler(context) - def add_reader(self, fd, callback, *args): - """Add a reader callback.""" + def _ensure_fd_no_transport(self, fd): + try: + transport = self._transports[fd] + except KeyError: + pass + else: + if not transport.is_closing(): + raise RuntimeError( + 'File descriptor {!r} is used by transport {!r}'.format( + fd, transport)) + + def _add_reader(self, fd, callback, *args): self._check_closed() handle = events.Handle(callback, args, self) try: @@ -260,8 +272,7 @@ class BaseSelectorEventLoop(base_events.BaseEventLoop): if reader is not None: reader.cancel() - def remove_reader(self, fd): - """Remove a reader callback.""" + def _remove_reader(self, fd): if self.is_closed(): return False try: @@ -282,8 +293,7 @@ class BaseSelectorEventLoop(base_events.BaseEventLoop): else: return False - def add_writer(self, fd, callback, *args): - """Add a writer callback..""" + def _add_writer(self, fd, callback, *args): self._check_closed() handle = events.Handle(callback, args, self) try: @@ -298,7 +308,7 @@ class BaseSelectorEventLoop(base_events.BaseEventLoop): if writer is not None: writer.cancel() - def remove_writer(self, fd): + def _remove_writer(self, fd): """Remove a writer callback.""" if self.is_closed(): return False @@ -321,6 +331,26 @@ class BaseSelectorEventLoop(base_events.BaseEventLoop): else: return False + def add_reader(self, fd, callback, *args): + """Add a reader callback.""" + self._ensure_fd_no_transport(fd) + return self._add_reader(fd, callback, *args) + + def remove_reader(self, fd): + """Remove a reader callback.""" + self._ensure_fd_no_transport(fd) + return self._remove_reader(fd) + + def add_writer(self, fd, callback, *args): + """Add a writer callback..""" + self._ensure_fd_no_transport(fd) + return self._add_writer(fd, callback, *args) + + def remove_writer(self, fd): + """Remove a writer callback.""" + self._ensure_fd_no_transport(fd) + return self._remove_writer(fd) + def sock_recv(self, sock, n): """Receive data from the socket. @@ -494,17 +524,17 @@ class BaseSelectorEventLoop(base_events.BaseEventLoop): fileobj, (reader, writer) = key.fileobj, key.data if mask & selectors.EVENT_READ and reader is not None: if reader._cancelled: - self.remove_reader(fileobj) + self._remove_reader(fileobj) else: self._add_callback(reader) if mask & selectors.EVENT_WRITE and writer is not None: if writer._cancelled: - self.remove_writer(fileobj) + self._remove_writer(fileobj) else: self._add_callback(writer) def _stop_serving(self, sock): - self.remove_reader(sock.fileno()) + self._remove_reader(sock.fileno()) sock.close() @@ -539,6 +569,7 @@ class _SelectorTransport(transports._FlowControlMixin, self._closing = False # Set when close() called. if self._server is not None: self._server._attach() + loop._transports[self._sock_fd] = self def __repr__(self): info = [self.__class__.__name__] @@ -584,10 +615,10 @@ class _SelectorTransport(transports._FlowControlMixin, if self._closing: return self._closing = True - self._loop.remove_reader(self._sock_fd) + self._loop._remove_reader(self._sock_fd) if not self._buffer: self._conn_lost += 1 - self._loop.remove_writer(self._sock_fd) + self._loop._remove_writer(self._sock_fd) self._loop.call_soon(self._call_connection_lost, None) # On Python 3.3 and older, objects with a destructor part of a reference @@ -619,10 +650,10 @@ class _SelectorTransport(transports._FlowControlMixin, return if self._buffer: self._buffer.clear() - self._loop.remove_writer(self._sock_fd) + self._loop._remove_writer(self._sock_fd) if not self._closing: self._closing = True - self._loop.remove_reader(self._sock_fd) + self._loop._remove_reader(self._sock_fd) self._conn_lost += 1 self._loop.call_soon(self._call_connection_lost, exc) @@ -659,7 +690,7 @@ class _SelectorSocketTransport(_SelectorTransport): self._loop.call_soon(self._protocol.connection_made, self) # only start reading when connection_made() has been called - self._loop.call_soon(self._loop.add_reader, + self._loop.call_soon(self._loop._add_reader, self._sock_fd, self._read_ready) if waiter is not None: # only wake up the waiter when connection_made() has been called @@ -672,7 +703,7 @@ class _SelectorSocketTransport(_SelectorTransport): if self._paused: raise RuntimeError('Already paused') self._paused = True - self._loop.remove_reader(self._sock_fd) + self._loop._remove_reader(self._sock_fd) if self._loop.get_debug(): logger.debug("%r pauses reading", self) @@ -682,7 +713,7 @@ class _SelectorSocketTransport(_SelectorTransport): self._paused = False if self._closing: return - self._loop.add_reader(self._sock_fd, self._read_ready) + self._loop._add_reader(self._sock_fd, self._read_ready) if self._loop.get_debug(): logger.debug("%r resumes reading", self) @@ -706,7 +737,7 @@ class _SelectorSocketTransport(_SelectorTransport): # We're keeping the connection open so the # protocol can write more, but we still can't # receive more, so remove the reader callback. - self._loop.remove_reader(self._sock_fd) + self._loop._remove_reader(self._sock_fd) else: self.close() @@ -739,7 +770,7 @@ class _SelectorSocketTransport(_SelectorTransport): if not data: return # Not all was written; register write handler. - self._loop.add_writer(self._sock_fd, self._write_ready) + self._loop._add_writer(self._sock_fd, self._write_ready) # Add it to the buffer. self._buffer.extend(data) @@ -755,7 +786,7 @@ class _SelectorSocketTransport(_SelectorTransport): except (BlockingIOError, InterruptedError): pass except Exception as exc: - self._loop.remove_writer(self._sock_fd) + self._loop._remove_writer(self._sock_fd) self._buffer.clear() self._fatal_error(exc, 'Fatal write error on socket transport') else: @@ -763,7 +794,7 @@ class _SelectorSocketTransport(_SelectorTransport): del self._buffer[:n] self._maybe_resume_protocol() # May append to buffer. if not self._buffer: - self._loop.remove_writer(self._sock_fd) + self._loop._remove_writer(self._sock_fd) if self._closing: self._call_connection_lost(None) elif self._eof: @@ -834,19 +865,19 @@ class _SelectorSslTransport(_SelectorTransport): try: self._sock.do_handshake() except ssl.SSLWantReadError: - self._loop.add_reader(self._sock_fd, - self._on_handshake, start_time) + self._loop._add_reader(self._sock_fd, + self._on_handshake, start_time) return except ssl.SSLWantWriteError: - self._loop.add_writer(self._sock_fd, - self._on_handshake, start_time) + self._loop._add_writer(self._sock_fd, + self._on_handshake, start_time) return except BaseException as exc: if self._loop.get_debug(): logger.warning("%r: SSL handshake failed", self, exc_info=True) - self._loop.remove_reader(self._sock_fd) - self._loop.remove_writer(self._sock_fd) + self._loop._remove_reader(self._sock_fd) + self._loop._remove_writer(self._sock_fd) self._sock.close() self._wakeup_waiter(exc) if isinstance(exc, Exception): @@ -854,8 +885,8 @@ class _SelectorSslTransport(_SelectorTransport): else: raise - self._loop.remove_reader(self._sock_fd) - self._loop.remove_writer(self._sock_fd) + self._loop._remove_reader(self._sock_fd) + self._loop._remove_writer(self._sock_fd) peercert = self._sock.getpeercert() if not hasattr(self._sslcontext, 'check_hostname'): @@ -883,7 +914,7 @@ class _SelectorSslTransport(_SelectorTransport): self._read_wants_write = False self._write_wants_read = False - self._loop.add_reader(self._sock_fd, self._read_ready) + self._loop._add_reader(self._sock_fd, self._read_ready) self._protocol_connected = True self._loop.call_soon(self._protocol.connection_made, self) # only wake up the waiter when connection_made() has been called @@ -905,7 +936,7 @@ class _SelectorSslTransport(_SelectorTransport): if self._paused: raise RuntimeError('Already paused') self._paused = True - self._loop.remove_reader(self._sock_fd) + self._loop._remove_reader(self._sock_fd) if self._loop.get_debug(): logger.debug("%r pauses reading", self) @@ -915,7 +946,7 @@ class _SelectorSslTransport(_SelectorTransport): self._paused = False if self._closing: return - self._loop.add_reader(self._sock_fd, self._read_ready) + self._loop._add_reader(self._sock_fd, self._read_ready) if self._loop.get_debug(): logger.debug("%r resumes reading", self) @@ -927,7 +958,7 @@ class _SelectorSslTransport(_SelectorTransport): self._write_ready() if self._buffer: - self._loop.add_writer(self._sock_fd, self._write_ready) + self._loop._add_writer(self._sock_fd, self._write_ready) try: data = self._sock.recv(self.max_size) @@ -935,8 +966,8 @@ class _SelectorSslTransport(_SelectorTransport): pass except ssl.SSLWantWriteError: self._read_wants_write = True - self._loop.remove_reader(self._sock_fd) - self._loop.add_writer(self._sock_fd, self._write_ready) + self._loop._remove_reader(self._sock_fd) + self._loop._add_writer(self._sock_fd, self._write_ready) except Exception as exc: self._fatal_error(exc, 'Fatal read error on SSL transport') else: @@ -961,7 +992,7 @@ class _SelectorSslTransport(_SelectorTransport): self._read_ready() if not (self._paused or self._closing): - self._loop.add_reader(self._sock_fd, self._read_ready) + self._loop._add_reader(self._sock_fd, self._read_ready) if self._buffer: try: @@ -970,10 +1001,10 @@ class _SelectorSslTransport(_SelectorTransport): n = 0 except ssl.SSLWantReadError: n = 0 - self._loop.remove_writer(self._sock_fd) + self._loop._remove_writer(self._sock_fd) self._write_wants_read = True except Exception as exc: - self._loop.remove_writer(self._sock_fd) + self._loop._remove_writer(self._sock_fd) self._buffer.clear() self._fatal_error(exc, 'Fatal write error on SSL transport') return @@ -984,7 +1015,7 @@ class _SelectorSslTransport(_SelectorTransport): self._maybe_resume_protocol() # May append to buffer. if not self._buffer: - self._loop.remove_writer(self._sock_fd) + self._loop._remove_writer(self._sock_fd) if self._closing: self._call_connection_lost(None) @@ -1002,7 +1033,7 @@ class _SelectorSslTransport(_SelectorTransport): return if not self._buffer: - self._loop.add_writer(self._sock_fd, self._write_ready) + self._loop._add_writer(self._sock_fd, self._write_ready) # Add it to the buffer. self._buffer.extend(data) @@ -1022,7 +1053,7 @@ class _SelectorDatagramTransport(_SelectorTransport): self._address = address self._loop.call_soon(self._protocol.connection_made, self) # only start reading when connection_made() has been called - self._loop.call_soon(self._loop.add_reader, + self._loop.call_soon(self._loop._add_reader, self._sock_fd, self._read_ready) if waiter is not None: # only wake up the waiter when connection_made() has been called @@ -1072,7 +1103,7 @@ class _SelectorDatagramTransport(_SelectorTransport): self._sock.sendto(data, addr) return except (BlockingIOError, InterruptedError): - self._loop.add_writer(self._sock_fd, self._sendto_ready) + self._loop._add_writer(self._sock_fd, self._sendto_ready) except OSError as exc: self._protocol.error_received(exc) return @@ -1106,6 +1137,6 @@ class _SelectorDatagramTransport(_SelectorTransport): self._maybe_resume_protocol() # May append to buffer. if not self._buffer: - self._loop.remove_writer(self._sock_fd) + self._loop._remove_writer(self._sock_fd) if self._closing: self._call_connection_lost(None) |