Remove third_party/twisted_8_1

third_party/twisted_8_1/twisted/internet/kqreactor.py

-# Copyright (c) 2001-2007 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()
-
-This reactor only works on FreeBSD and requires PyKQueue 1.3, which is
-available at:  U{http://people.freebsd.org/~dwhite/PyKQueue/}
-
-Maintainer: U{Itamar Shtull-Trauring<mailto:twisted@itamarst.org>}
-
-
-
-You're going to need to patch PyKqueue::
-
-    =====================================================
-    --- PyKQueue-1.3/kqsyscallmodule.c  Sun Jan 28 21:59:50 2001
-    +++ PyKQueue-1.3/kqsyscallmodule.c.new      Tue Jul 30 18:06:08 2002
-    @@ -137,7 +137,7 @@
-     }
-     
-     statichere PyTypeObject KQEvent_Type = {
-    -  PyObject_HEAD_INIT(NULL)
-    +  PyObject_HEAD_INIT(&PyType_Type)
-       0,                             // ob_size
-       "KQEvent",                     // tp_name
-       sizeof(KQEventObject),         // tp_basicsize
-    @@ -291,13 +291,14 @@
-     
-       /* Build timespec for timeout */
-       totimespec.tv_sec = timeout / 1000;
-    -  totimespec.tv_nsec = (timeout % 1000) * 100000;
-    +  totimespec.tv_nsec = (timeout % 1000) * 1000000;
-     
-       // printf("timespec: sec=%d nsec=%d\\n", totimespec.tv_sec, totimespec.tv_nsec);
-     
-       /* Make the call */
-    -
-    +  Py_BEGIN_ALLOW_THREADS
-       gotNumEvents = kevent (self->fd, changelist, haveNumEvents, triggered, wantNumEvents, &totimespec);
-    +  Py_END_ALLOW_THREADS
-     
-       /* Don't need the input event list anymore, so get rid of it */
-       free (changelist);
-    @@ -361,7 +362,7 @@
-     statichere PyTypeObject KQueue_Type = {
-            /* The ob_type field must be initialized in the module init function
-             * to be portable to Windows without using C++. */
-    -   PyObject_HEAD_INIT(NULL)
-    +   PyObject_HEAD_INIT(&PyType_Type)
-            0,                  /*ob_size*/
-            "KQueue",                   /*tp_name*/
-            sizeof(KQueueObject),       /*tp_basicsize*/
-
-"""
-
-import errno, sys
-
-from zope.interface import implements
-
-from kqsyscall import EVFILT_READ, EVFILT_WRITE, EV_DELETE, EV_ADD
-from kqsyscall import kqueue, kevent
-
-from twisted.internet.interfaces import IReactorFDSet
-
-from twisted.python import log, failure
-from twisted.internet import main, posixbase
-
-
-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 dictionary mapping integer file descriptors to arbitrary
-        values (this is essentially a set).  Keys in this dictionary 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 dictionary mapping integer file descriptors to arbitrary
-        values (this is essentially a set).  Keys in this dictionary 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 dictionaries, and the
-        base class.
-        """
-        self._kq = kqueue()
-        self._reads = {}
-        self._writes = {}
-        self._selectables = {}
-        posixbase.PosixReactorBase.__init__(self)
-
-
-    def _updateRegistration(self, *args):
-        self._kq.kevent([kevent(*args)], 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:
-            self._selectables[fd] = reader
-            self._reads[fd] = 1
-            self._updateRegistration(fd, EVFILT_READ, EV_ADD)
-
-    def addWriter(self, writer):
-        """Add a FileDescriptor for notification of data available to write.
-        """
-        fd = writer.fileno()
-        if fd not in self._writes:
-            self._selectables[fd] = writer
-            self._writes[fd] = 1
-            self._updateRegistration(fd, EVFILT_WRITE, EV_ADD)
-
-    def removeReader(self, reader):
-        """Remove a Selectable for notification of data available to read.
-        """
-        fd = reader.fileno()
-        if fd in self._reads:
-            del self._reads[fd]
-            if fd not in self._writes:
-                del self._selectables[fd]
-            self._updateRegistration(fd, EVFILT_READ, EV_DELETE)
-
-    def removeWriter(self, writer):
-        """Remove a Selectable for notification of data available to write.
-        """
-        fd = writer.fileno()
-        if fd in self._writes:
-            del self._writes[fd]
-            if fd not in self._reads:
-                del self._selectables[fd]
-            self._updateRegistration(fd, EVFILT_WRITE, EV_DELETE)
-
-    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.keys():
-            self._updateRegistration(fd, EVFILT_READ, EV_DELETE)
-        for fd in self._writes.keys():
-            self._updateRegistration(fd, EVFILT_WRITE, 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 = 1000
-        else:
-            timeout = int(timeout * 1000) # convert seconds to milliseconds
-
-        try:
-            l = self._kq.kevent([], len(self._selectables), timeout)
-        except OSError, e:
-            if e[0] == errno.EINTR:
-                return
-            else:
-                raise
-        _drdw = self._doWriteOrRead
-        for event in l:
-            why = None
-            fd, filter = event.ident, event.filter
-            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, filter)
-
-    def _doWriteOrRead(self, selectable, fd, filter):
-        try:
-            if filter == EVFILT_READ:
-                why = selectable.doRead()
-            if filter == EVFILT_WRITE:
-                why = selectable.doWrite()
-            if not selectable.fileno() == fd:
-                why = main.CONNECTION_LOST
-        except:
-            why = sys.exc_info()[1]
-            log.deferr()
-
-        if why:
-            self.removeReader(selectable)
-            self.removeWriter(selectable)
-            selectable.connectionLost(failure.Failure(why))
-
-    doIteration = doKEvent
-
-
-def install():
-    k = KQueueReactor()
-    main.installReactor(k)
-
-
-__all__ = ["KQueueReactor", "install"]