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3 e8 ? 3"""Event loop using a proactor and related classes. A proactor is a "notify-on-completion" multiplexer. Currently a proactor is only implemented on Windows with IOCP. """ __all__ = 'BaseProactorEventLoop', import io import os import socket import warnings import signal import threading import collections from . import base_events from . import constants from . import futures from . import exceptions from . import protocols from . import sslproto from . import transports from . import trsock from .log import logger def _set_socket_extra(transport, sock): transport._extra['socket'] = trsock.TransportSocket(sock) try: transport._extra['sockname'] = sock.getsockname() except socket.error: if transport._loop.get_debug(): logger.warning( "getsockname() failed on %r", sock, exc_info=True) if 'peername' not in transport._extra: try: transport._extra['peername'] = sock.getpeername() except socket.error: # UDP sockets may not have a peer name transport._extra['peername'] = None class _ProactorBasePipeTransport(transports._FlowControlMixin, transports.BaseTransport): """Base class for pipe and socket transports.""" def __init__(self, loop, sock, protocol, waiter=None, extra=None, server=None): super().__init__(extra, loop) self._set_extra(sock) self._sock = sock self.set_protocol(protocol) self._server = server self._buffer = None # None or bytearray. self._read_fut = None self._write_fut = None self._pending_write = 0 self._conn_lost = 0 self._closing = False # Set when close() called. self._called_connection_lost = False self._eof_written = False if self._server is not None: self._server._attach() self._loop.call_soon(self._protocol.connection_made, self) if waiter is not None: # only wake up the waiter when connection_made() has been called self._loop.call_soon(futures._set_result_unless_cancelled, waiter, None) def __repr__(self): info = [self.__class__.__name__] if self._sock is None: info.append('closed') elif self._closing: info.append('closing') if self._sock is not None: info.append(f'fd={self._sock.fileno()}') if self._read_fut is not None: info.append(f'read={self._read_fut!r}') if self._write_fut is not None: info.append(f'write={self._write_fut!r}') if self._buffer: info.append(f'write_bufsize={len(self._buffer)}') if self._eof_written: info.append('EOF written') return '<{}>'.format(' '.join(info)) def _set_extra(self, sock): self._extra['pipe'] = sock def set_protocol(self, protocol): self._protocol = protocol def get_protocol(self): return self._protocol def is_closing(self): return self._closing def close(self): if self._closing: return self._closing = True self._conn_lost += 1 if not self._buffer and self._write_fut is None: self._loop.call_soon(self._call_connection_lost, None) if self._read_fut is not None: self._read_fut.cancel() self._read_fut = None def __del__(self, _warn=warnings.warn): if self._sock is not None: _warn(f"unclosed transport {self!r}", ResourceWarning, source=self) self._