[CalendarServer-changes] [12098] twext/trunk/twext/internet/kqreactor.py
source_changes at macosforge.org
source_changes at macosforge.org
Wed Mar 12 11:22:45 PDT 2014
Revision: 12098
http://trac.calendarserver.org//changeset/12098
Author: wsanchez at apple.com
Date: 2013-12-13 17:09:25 -0800 (Fri, 13 Dec 2013)
Log Message:
-----------
Obsolete.
Removed Paths:
-------------
twext/trunk/twext/internet/kqreactor.py
Deleted: twext/trunk/twext/internet/kqreactor.py
===================================================================
--- twext/trunk/twext/internet/kqreactor.py 2013-12-14 01:08:33 UTC (rev 12097)
+++ twext/trunk/twext/internet/kqreactor.py 2013-12-14 01:09:25 UTC (rev 12098)
@@ -1,228 +0,0 @@
-# Copyright (c) 2001-2008 Twisted Matrix Laboratories.
-# See LICENSE for details.
-
-
-"""
-A kqueue()/kevent() based implementation of the Twisted main loop.
-
-To install the event loop (and you should do this before any connections,
-listeners or connectors are added)::
-
- | from twisted.internet import kqreactor
- | kqreactor.install()
-
-
-Maintainer: U{Itamar Shtull-Trauring<mailto:twisted at itamarst.org>}
-"""
-
-
-import errno, sys
-
-try:
- from select import KQ_FILTER_READ, KQ_FILTER_WRITE, KQ_EV_DELETE, KQ_EV_ADD
- from select import kqueue, kevent, KQ_EV_ENABLE, KQ_EV_DISABLE, KQ_EV_EOF
-except ImportError:
- from select26 import KQ_FILTER_READ, KQ_FILTER_WRITE, KQ_EV_DELETE, KQ_EV_ADD
- from select26 import kqueue, kevent, KQ_EV_ENABLE, KQ_EV_DISABLE, KQ_EV_EOF
-
-from zope.interface import implements
-
-from twisted.python import log
-from twisted.internet import main, posixbase
-from twisted.internet.interfaces import IReactorFDSet
-
-
-
-class KQueueReactor(posixbase.PosixReactorBase):
- """
- A reactor that uses kqueue(2)/kevent(2).
-
- @ivar _kq: A L{kqueue} which will be used to check for I/O readiness.
-
- @ivar _selectables: A dictionary mapping integer file descriptors to
- instances of L{FileDescriptor} which have been registered with the
- reactor. All L{FileDescriptors} which are currently receiving read or
- write readiness notifications will be present as values in this
- dictionary.
-
- @ivar _reads: A set storing integer file descriptors. These values 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 storing integer file descriptors. These values will
- be registered with C{_kq} for write readiness notifications which will
- be dispatched to the corresponding L{FileDescriptor} instances in
- C{_selectables}.
- """
- implements(IReactorFDSet)
-
- def __init__(self):
- """
- Initialize kqueue object, file descriptor tracking sets, and the base
- class.
- """
- self._kq = kqueue()
- self._reads = set()
- self._writes = set()
- self._selectables = {}
- posixbase.PosixReactorBase.__init__(self)
-
-
- def _updateRegistration(self, fd, filter, flags):
- ev = kevent(fd, filter, flags)
- self._kq.control([ev], 0, 0)
-
-
- def addReader(self, reader):
- """
- Add a FileDescriptor for notification of data available to read.
- """
- fd = reader.fileno()
- if fd not in self._reads:
- if fd not in self._selectables:
- self._updateRegistration(fd, KQ_FILTER_READ, KQ_EV_ADD|KQ_EV_ENABLE)
- self._updateRegistration(fd, KQ_FILTER_WRITE, KQ_EV_ADD|KQ_EV_DISABLE)
- self._selectables[fd] = reader
- else:
- self._updateRegistration(fd, KQ_FILTER_READ, KQ_EV_ENABLE)
- self._reads.add(fd)
-
-
- def addWriter(self, writer):
- """
- Add a FileDescriptor for notification of data available to write.
- """
- fd = writer.fileno()
- if fd not in self._writes:
- if fd not in self._selectables:
- self._updateRegistration(fd, KQ_FILTER_WRITE, KQ_EV_ADD|KQ_EV_ENABLE)
- self._updateRegistration(fd, KQ_FILTER_READ, KQ_EV_ADD|KQ_EV_DISABLE)
- self._selectables[fd] = writer
- else:
- self._updateRegistration(fd, KQ_FILTER_WRITE, KQ_EV_ENABLE)
- self._writes.add(fd)
-
-
- def removeReader(self, reader):
- """
- Remove a Selectable for notification of data available to read.
- """
- fd = reader.fileno()
- if fd == -1:
- for fd, fdes in self._selectables.iteritems():
- if reader is fdes:
- break
- else:
- return
- if fd in self._reads:
- self._reads.discard(fd)
- if fd not in self._writes:
- del self._selectables[fd]
- self._updateRegistration(fd, KQ_FILTER_READ, KQ_EV_DISABLE)
-
-
- def removeWriter(self, writer):
- """
- Remove a Selectable for notification of data available to write.
- """
- fd = writer.fileno()
- if fd == -1:
- for fd, fdes in self._selectables.iteritems():
- if writer is fdes:
- break
- else:
- return
- if fd in self._writes:
- self._writes.discard(fd)
- if fd not in self._reads:
- del self._selectables[fd]
- self._updateRegistration(fd, KQ_FILTER_WRITE, KQ_EV_DISABLE)
-
-
- def removeAll(self):
- """
- Remove all selectables, and return a list of them.
- """
- if self.waker is not None:
- self.removeReader(self.waker)
- result = self._selectables.values()
- for fd in self._reads:
- self._updateRegistration(fd, KQ_FILTER_READ, KQ_EV_DELETE)
- for fd in self._writes:
- self._updateRegistration(fd, KQ_FILTER_WRITE, KQ_EV_DELETE)
- self._reads.clear()
- self._writes.clear()
- self._selectables.clear()
- if self.waker is not None:
- self.addReader(self.waker)
- return result
-
-
- def getReaders(self):
- return [self._selectables[fd] for fd in self._reads]
-
-
- def getWriters(self):
- 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:
- l = self._kq.control([], len(self._selectables), timeout)
- except OSError, e:
- if e[0] == errno.EINTR:
- return
- else:
- raise
- _drdw = self._doWriteOrRead
- for event in l:
- fd = event.ident
- try:
- selectable = self._selectables[fd]
- except KeyError:
- # Handles the infrequent case where one selectable's
- # handler disconnects another.
- continue
- log.callWithLogger(selectable, _drdw, selectable, fd, event)
-
-
- def _doWriteOrRead(self, selectable, fd, event):
- 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 filter == KQ_FILTER_READ:
- inRead = True
- why = selectable.doRead()
- if filter == KQ_FILTER_WRITE:
- inRead = False
- why = selectable.doWrite()
- if not selectable.fileno() == fd:
- inRead = False
- why = main.CONNECTION_LOST
- except:
- log.err()
- why = sys.exc_info()[1]
-
- if why:
- self._disconnectSelectable(selectable, why, inRead)
-
- doIteration = doKEvent
-
-
-def install():
- k = KQueueReactor()
- main.installReactor(k)
-
-
-__all__ = ["KQueueReactor", "install"]
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