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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/kqreactor.py (10818B)

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

"""
A kqueue()/kevent() based implementation of the Twisted main loop.

To use this reactor, start your application specifying the kqueue reactor::

twistd --reactor kqueue ...

To install the event loop from code (and you should do this before any
connections, listeners or connectors are added)::

from twisted.internet import kqreactor
   kqreactor.install()
"""

import errno
import select

from zope.interface import Attribute, Interface, declarations, implementer

from twisted.internet import main, posixbase
from twisted.internet.interfaces import IReactorDaemonize, IReactorFDSet
from twisted.python import failure, log

try:
    # This is to keep mypy from complaining
    # We don't use type: ignore[attr-defined] on import, because mypy only complains
    # on on some platforms, and then the unused ignore is an issue if the undefined
    # attribute isn't.
    KQ_EV_ADD = getattr(select, "KQ_EV_ADD")
    KQ_EV_DELETE = getattr(select, "KQ_EV_DELETE")
    KQ_EV_EOF = getattr(select, "KQ_EV_EOF")
    KQ_FILTER_READ = getattr(select, "KQ_FILTER_READ")
    KQ_FILTER_WRITE = getattr(select, "KQ_FILTER_WRITE")
except AttributeError as e:
    raise ImportError(e)

class _IKQueue(Interface):
    """
    An interface for KQueue implementations.
    """

kqueue = Attribute("An implementation of kqueue(2).")
    kevent = Attribute("An implementation of kevent(2).")

declarations.directlyProvides(select, _IKQueue)

@implementer(IReactorFDSet, IReactorDaemonize)
class KQueueReactor(posixbase.PosixReactorBase):
    """
    A reactor that uses kqueue(2)/kevent(2) and relies on Python 2.6 or higher
    which has built in support for kqueue in the select module.

@ivar _kq: A C{kqueue} which will be used to check for I/O readiness.

@ivar _impl: The implementation of L{_IKQueue} to use.

@ivar _selectables: A dictionary mapping integer file descriptors to
        instances of L{FileDescriptor} which have been registered with the
        reactor.  All L{FileDescriptor}s which are currently receiving read or
        write readiness notifications will be present as values in this
        dictionary.

@ivar _reads: A set containing integer file descriptors.  Values in this
        set will be registered with C{_kq} for read readiness notifications
        which will be dispatched to the corresponding L{FileDescriptor}
        instances in C{_selectables}.

@ivar _writes: A set containing integer file descriptors.  Values in this
        set will be registered with C{_kq} for write readiness notifications
        which will be dispatched to the corresponding L{FileDescriptor}
        instances in C{_selectables}.
    """

def __init__(self, _kqueueImpl=select):
        """
        Initialize kqueue object, file descriptor tracking dictionaries, and
        the base class.

See:
            - http://docs.python.org/library/select.html
            - www.freebsd.org/cgi/man.cgi?query=kqueue
            - people.freebsd.org/~jlemon/papers/kqueue.pdf

@param _kqueueImpl: The implementation of L{_IKQueue} to use. A
            hook for testing.
        """
        self._impl = _kqueueImpl
        self._kq = self._impl.kqueue()
        self._reads = set()
        self._writes = set()
        self._selectables = {}
        posixbase.PosixReactorBase.__init__(self)

def _updateRegistration(self, fd, filter, op):
        """
        Private method for changing kqueue registration on a given FD
        filtering for events given filter/op. This will never block and
        returns nothing.
        """
        self._kq.control([self._impl.kevent(fd, filter, op)], 0, 0)

def beforeDaemonize(self):
        """
        Implement L{IReactorDaemonize.beforeDaemonize}.
        """
        # Twisted-internal method called during daemonization (when application
        # is started via twistd). This is called right before the magic double
        # forking done for daemonization. We cleanly close the kqueue() and later
        # recreate it. This is needed since a) kqueue() are not inherited across
        # forks and b) twistd will create the reactor already before daemonization
        # (and will also add at least 1 reader to the reactor, an instance of
        # twisted.internet.posixbase._UnixWaker).
        #
        # See: twisted.scripts._twistd_unix.daemonize()
        self._kq.close()
        self._kq = None

def afterDaemonize(self):
        """
        Implement L{IReactorDaemonize.afterDaemonize}.
        """
        # Twisted-internal method called during daemonization. This is called right
        # after daemonization and recreates the kqueue() and any readers/writers
        # that were added before. Note that you MUST NOT call any reactor methods
        # in between beforeDaemonize() and afterDaemonize()!
        self._kq = self._impl.kqueue()
        for fd in self._reads:
            self._updateRegistration(fd, KQ_FILTER_READ, KQ_EV_ADD)
        for fd in self._writes:
            self._updateRegistration(fd, KQ_FILTER_WRITE, KQ_EV_ADD)

def addReader(self, reader):
        """
        Implement L{IReactorFDSet.addReader}.
        """
        fd = reader.fileno()
        if fd not in self._reads:
            try:
                self._updateRegistration(fd, KQ_FILTER_READ, KQ_EV_ADD)
            except OSError:
                pass
            finally:
                self._selectables[fd] = reader
                self._reads.add(fd)

def addWriter(self, writer):
        """
        Implement L{IReactorFDSet.addWriter}.
        """
        fd = writer.fileno()
        if fd not in self._writes:
            try:
                self._updateRegistration(fd, KQ_FILTER_WRITE, KQ_EV_ADD)
            except OSError:
                pass
            finally:
                self._selectables[fd] = writer
                self._writes.add(fd)

def removeReader(self, reader):
        """
        Implement L{IReactorFDSet.removeReader}.
        """
        wasLost = False
        try:
            fd = reader.fileno()
        except BaseException:
            fd = -1
        if fd == -1:
            for fd, fdes in self._selectables.items():
                if reader is fdes:
                    wasLost = True
                    break
            else:
                return
        if fd in self._reads:
            self._reads.remove(fd)
            if fd not in self._writes:
                del self._selectables[fd]
            if not wasLost:
                try:
                    self._updateRegistration(fd, KQ_FILTER_READ, KQ_EV_DELETE)
                except OSError:
                    pass

def removeWriter(self, writer):
        """
        Implement L{IReactorFDSet.removeWriter}.
        """
        wasLost = False
        try:
            fd = writer.fileno()
        except BaseException:
            fd = -1
        if fd == -1:
            for fd, fdes in self._selectables.items():
                if writer is fdes:
                    wasLost = True
                    break
            else:
                return
        if fd in self._writes:
            self._writes.remove(fd)
            if fd not in self._reads:
                del self._selectables[fd]
            if not wasLost:
                try:
                    self._updateRegistration(fd, KQ_FILTER_WRITE, KQ_EV_DELETE)
                except OSError:
                    pass

def removeAll(self):
        """
        Implement L{IReactorFDSet.removeAll}.
        """
        return self._removeAll(
            [self._selectables[fd] for fd in self._reads],
            [self._selectables[fd] for fd in self._writes],
        )

def getReaders(self):
        """
        Implement L{IReactorFDSet.getReaders}.
        """
        return [self._selectables[fd] for fd in self._reads]

def getWriters(self):
        """
        Implement L{IReactorFDSet.getWriters}.
        """
        return [self._selectables[fd] for fd in self._writes]

def doKEvent(self, timeout):
        """
        Poll the kqueue for new events.
        """
        if timeout is None:
            timeout = 1

try:
            events = self._kq.control([], len(self._selectables), timeout)
        except OSError as e:
            # Since this command blocks for potentially a while, it's possible
            # EINTR can be raised for various reasons (for example, if the user
            # hits ^C).
            if e.errno == errno.EINTR:
                return
            else:
                raise

_drdw = self._doWriteOrRead
        for event in events:
            fd = event.ident
            try:
                selectable = self._selectables[fd]
            except KeyError:
                # Handles the infrequent case where one selectable's
                # handler disconnects another.
                continue
            else:
                log.callWithLogger(selectable, _drdw, selectable, fd, event)

def _doWriteOrRead(self, selectable, fd, event):
        """
        Private method called when a FD is ready for reading, writing or was
        lost. Do the work and raise errors where necessary.
        """
        why = None
        inRead = False
        (filter, flags, data, fflags) = (
            event.filter,
            event.flags,
            event.data,
            event.fflags,
        )

if flags & KQ_EV_EOF and data and fflags:
            why = main.CONNECTION_LOST
        else:
            try:
                if selectable.fileno() == -1:
                    inRead = False
                    why = posixbase._NO_FILEDESC
                else:
                    if filter == KQ_FILTER_READ:
                        inRead = True
                        why = selectable.doRead()
                    if filter == KQ_FILTER_WRITE:
                        inRead = False
                        why = selectable.doWrite()
            except BaseException:
                # Any exception from application code gets logged and will
                # cause us to disconnect the selectable.
                why = failure.Failure()
                log.err(
                    why,
                    "An exception was raised from application code"
                    " while processing a reactor selectable",
                )

if why:
            self._disconnectSelectable(selectable, why, inRead)

doIteration = doKEvent

def install():
    """
    Install the kqueue() reactor.
    """
    p = KQueueReactor()
    from twisted.internet.main import installReactor

installReactor(p)

__all__ = ["KQueueReactor", "install"]

cmd: