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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	19274	0644	edit dl rm
address.py	5246	0644	edit dl rm
asyncioreactor.py	10553	0644	edit dl rm
base.py	44260	0644	edit dl rm
cfreactor.py	17501	0644	edit dl rm
default.py	1942	0644	edit dl rm
defer.py	71193	0644	edit dl rm
endpoints.py	77207	0644	edit dl rm
epollreactor.py	8493	0644	edit dl rm
error.py	12645	0644	edit dl rm
fdesc.py	3223	0644	edit dl rm
gireactor.py	6123	0644	edit dl rm
glib2reactor.py	1115	0644	edit dl rm
gtk2reactor.py	3614	0644	edit dl rm
gtk3reactor.py	2252	0644	edit dl rm
inotify.py	14691	0644	edit dl rm
interfaces.py	96515	0644	edit dl rm
kqreactor.py	10292	0644	edit dl rm
main.py	1054	0644	edit dl rm
pollreactor.py	6026	0644	edit dl rm
posixbase.py	26357	0644	edit dl rm
process.py	38896	0644	edit dl rm
protocol.py	27134	0644	edit dl rm
pyuisupport.py	817	0644	edit dl rm
reactor.py	1863	0644	edit dl rm
selectreactor.py	6215	0644	edit dl rm
serialport.py	2317	0644	edit dl rm
ssl.py	8444	0644	edit dl rm
stdio.py	1045	0644	edit dl rm
task.py	31119	0644	edit dl rm
tcp.py	54908	0644	edit dl rm
threads.py	3953	0644	edit dl rm
tksupport.py	2045	0644	edit dl rm
udp.py	18569	0644	edit dl rm
unix.py	21965	0644	edit dl rm
utils.py	7876	0644	edit dl rm
win32eventreactor.py	15193	0644	edit dl rm
wxreactor.py	5263	0644	edit dl rm
wxsupport.py	1363	0644	edit dl rm
_baseprocess.py	1913	0644	edit dl rm
_dumbwin32proc.py	13107	0644	edit dl rm
_glibbase.py	12813	0644	edit dl rm
_idna.py	1397	0644	edit dl rm
_newtls.py	9332	0644	edit dl rm
_pollingfile.py	8982	0644	edit dl rm
_posixserialport.py	1995	0644	edit dl rm
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_threadedselect.py	11764	0644	edit dl rm
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_win32stdio.py	3204	0644	edit dl rm
__init__.py	521	0644	edit dl rm

Edit: /usr/lib/python3/dist-packages/twisted/internet/kqreactor.py (10292B)

# -*- 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()
"""

from __future__ import division, absolute_import

import errno
import select

from select import KQ_FILTER_READ, KQ_FILTER_WRITE
from select import KQ_EV_DELETE, KQ_EV_ADD, KQ_EV_EOF

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

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

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:
            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:
            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:
                # 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: