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/usr/lib/python3/dist-packages/twisted/internet/

/usr/lib/python3/dist-packages/twisted/internet

Name	Size	Mode	Actions
iocpreactor/	-	0755	rm
test/	-	0755	rm
__pycache__/	-	0755	rm
abstract.py	19295	0644	edit dl rm
address.py	5244	0644	edit dl rm
asyncioreactor.py	11131	0644	edit dl rm
base.py	47392	0644	edit dl rm
cfreactor.py	17499	0644	edit dl rm
default.py	1893	0644	edit dl rm
defer.py	85654	0644	edit dl rm
endpoints.py	77440	0644	edit dl rm
epollreactor.py	8941	0644	edit dl rm
error.py	13482	0644	edit dl rm
fdesc.py	3237	0644	edit dl rm
gireactor.py	4620	0644	edit dl rm
glib2reactor.py	1115	0644	edit dl rm
gtk2reactor.py	3640	0644	edit dl rm
gtk3reactor.py	1527	0644	edit dl rm
inotify.py	14396	0644	edit dl rm
interfaces.py	98048	0644	edit dl rm
kqreactor.py	10818	0644	edit dl rm
main.py	1006	0644	edit dl rm
pollreactor.py	5974	0644	edit dl rm
posixbase.py	27604	0644	edit dl rm
process.py	38516	0644	edit dl rm
protocol.py	27391	0644	edit dl rm
pyuisupport.py	843	0644	edit dl rm
reactor.py	1816	0644	edit dl rm
selectreactor.py	6102	0644	edit dl rm
serialport.py	2272	0644	edit dl rm
ssl.py	8643	0644	edit dl rm
stdio.py	1000	0644	edit dl rm
task.py	33608	0644	edit dl rm
tcp.py	54980	0644	edit dl rm
testing.py	29232	0644	edit dl rm
threads.py	3812	0644	edit dl rm
tksupport.py	1971	0644	edit dl rm
udp.py	18619	0644	edit dl rm
unix.py	22508	0644	edit dl rm
utils.py	8682	0644	edit dl rm
win32eventreactor.py	15266	0644	edit dl rm
wxreactor.py	5315	0644	edit dl rm
wxsupport.py	1305	0644	edit dl rm
_baseprocess.py	2003	0644	edit dl rm
_dumbwin32proc.py	12776	0644	edit dl rm
_glibbase.py	12706	0644	edit dl rm
_idna.py	1422	0644	edit dl rm
_newtls.py	9157	0644	edit dl rm
_pollingfile.py	8791	0644	edit dl rm
_posixserialport.py	2081	0644	edit dl rm
_posixstdio.py	4996	0644	edit dl rm
_producer_helpers.py	3909	0644	edit dl rm
_resolver.py	8465	0644	edit dl rm
_signals.py	2670	0644	edit dl rm
_sslverify.py	72796	0644	edit dl rm
_threadedselect.py	11582	0644	edit dl rm
_win32serialport.py	4914	0644	edit dl rm
_win32stdio.py	3140	0644	edit dl rm
__init__.py	521	0644	edit dl rm

Edit: /usr/lib/python3/dist-packages/twisted/internet/selectreactor.py (6102B)

# -*- test-case-name: twisted.test.test_internet -*-
# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.

"""
Select reactor
"""

import select
import sys
from errno import EBADF, EINTR
from time import sleep
from typing import Type

from zope.interface import implementer

from twisted.internet import posixbase
from twisted.internet.interfaces import IReactorFDSet
from twisted.python import log
from twisted.python.runtime import platformType

def win32select(r, w, e, timeout=None):
    """Win32 select wrapper."""
    if not (r or w):
        # windows select() exits immediately when no sockets
        if timeout is None:
            timeout = 0.01
        else:
            timeout = min(timeout, 0.001)
        sleep(timeout)
        return [], [], []
    # windows doesn't process 'signals' inside select(), so we set a max
    # time or ctrl-c will never be recognized
    if timeout is None or timeout > 0.5:
        timeout = 0.5
    r, w, e = select.select(r, w, w, timeout)
    return r, w + e, []

if platformType == "win32":
    _select = win32select
else:
    _select = select.select

try:
    from twisted.internet.win32eventreactor import _ThreadedWin32EventsMixin
except ImportError:
    _extraBase: Type[object] = object
else:
    _extraBase = _ThreadedWin32EventsMixin

@implementer(IReactorFDSet)
class SelectReactor(posixbase.PosixReactorBase, _extraBase):  # type: ignore[misc,valid-type]
    """
    A select() based reactor - runs on all POSIX platforms and on Win32.

@ivar _reads: A set containing L{FileDescriptor} instances which will be
        checked for read events.

@ivar _writes: A set containing L{FileDescriptor} instances which will be
        checked for writability.
    """

def __init__(self):
        """
        Initialize file descriptor tracking dictionaries and the base class.
        """
        self._reads = set()
        self._writes = set()
        posixbase.PosixReactorBase.__init__(self)

def _preenDescriptors(self):
        log.msg("Malformed file descriptor found.  Preening lists.")
        readers = list(self._reads)
        writers = list(self._writes)
        self._reads.clear()
        self._writes.clear()
        for selSet, selList in ((self._reads, readers), (self._writes, writers)):
            for selectable in selList:
                try:
                    select.select([selectable], [selectable], [selectable], 0)
                except Exception as e:
                    log.msg("bad descriptor %s" % selectable)
                    self._disconnectSelectable(selectable, e, False)
                else:
                    selSet.add(selectable)

def doSelect(self, timeout):
        """
        Run one iteration of the I/O monitor loop.

This will run all selectables who had input or output readiness
        waiting for them.
        """
        try:
            r, w, ignored = _select(self._reads, self._writes, [], timeout)
        except ValueError:
            # Possibly a file descriptor has gone negative?
            self._preenDescriptors()
            return
        except TypeError:
            # Something *totally* invalid (object w/o fileno, non-integral
            # result) was passed
            log.err()
            self._preenDescriptors()
            return
        except OSError as se:
            # select(2) encountered an error, perhaps while calling the fileno()
            # method of a socket.  (Python 2.6 socket.error is an IOError
            # subclass, but on Python 2.5 and earlier it is not.)
            if se.args[0] in (0, 2):
                # windows does this if it got an empty list
                if (not self._reads) and (not self._writes):
                    return
                else:
                    raise
            elif se.args[0] == EINTR:
                return
            elif se.args[0] == EBADF:
                self._preenDescriptors()
                return
            else:
                # OK, I really don't know what's going on.  Blow up.
                raise

_drdw = self._doReadOrWrite
        _logrun = log.callWithLogger
        for selectables, method, fdset in (
            (r, "doRead", self._reads),
            (w, "doWrite", self._writes),
        ):
            for selectable in selectables:
                # if this was disconnected in another thread, kill it.
                # ^^^^ --- what the !@#*?  serious!  -exarkun
                if selectable not in fdset:
                    continue
                # This for pausing input when we're not ready for more.
                _logrun(selectable, _drdw, selectable, method)

doIteration = doSelect

def _doReadOrWrite(self, selectable, method):
        try:
            why = getattr(selectable, method)()
        except BaseException:
            why = sys.exc_info()[1]
            log.err()
        if why:
            self._disconnectSelectable(selectable, why, method == "doRead")

def addReader(self, reader):
        """
        Add a FileDescriptor for notification of data available to read.
        """
        self._reads.add(reader)

def addWriter(self, writer):
        """
        Add a FileDescriptor for notification of data available to write.
        """
        self._writes.add(writer)

def removeReader(self, reader):
        """
        Remove a Selectable for notification of data available to read.
        """
        self._reads.discard(reader)

def removeWriter(self, writer):
        """
        Remove a Selectable for notification of data available to write.
        """
        self._writes.discard(writer)

def removeAll(self):
        return self._removeAll(self._reads, self._writes)

def getReaders(self):
        return list(self._reads)

def getWriters(self):
        return list(self._writes)

def install():
    """Configure the twisted mainloop to be run using the select() reactor."""
    reactor = SelectReactor()
    from twisted.internet.main import installReactor

installReactor(reactor)

__all__ = ["install"]

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