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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
_posixstdio.py	4687	0644	edit dl rm
_producer_helpers.py	3788	0644	edit dl rm
_resolver.py	8530	0644	edit dl rm
_signals.py	2718	0644	edit dl rm
_sslverify.py	71770	0644	edit dl rm
_threadedselect.py	11764	0644	edit dl rm
_win32serialport.py	4744	0644	edit dl rm
_win32stdio.py	3204	0644	edit dl rm
__init__.py	521	0644	edit dl rm

Edit: /usr/lib/python3/dist-packages/twisted/internet/_pollingfile.py (8982B)

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

"""
Implements a simple polling interface for file descriptors that don't work with
select() - this is pretty much only useful on Windows.
"""

from __future__ import absolute_import, division

from zope.interface import implementer
from twisted.internet.interfaces import IConsumer, IPushProducer
from twisted.python.compat import unicode

MIN_TIMEOUT = 0.000000001
MAX_TIMEOUT = 0.1

class _PollableResource:
    active = True

def activate(self):
        self.active = True

def deactivate(self):
        self.active = False

class _PollingTimer:
    # Everything is private here because it is really an implementation detail.

def __init__(self, reactor):
        self.reactor = reactor
        self._resources = []
        self._pollTimer = None
        self._currentTimeout = MAX_TIMEOUT
        self._paused = False

def _addPollableResource(self, res):
        self._resources.append(res)
        self._checkPollingState()

def _checkPollingState(self):
        for resource in self._resources:
            if resource.active:
                self._startPolling()
                break
        else:
            self._stopPolling()

def _startPolling(self):
        if self._pollTimer is None:
            self._pollTimer = self._reschedule()

def _stopPolling(self):
        if self._pollTimer is not None:
            self._pollTimer.cancel()
            self._pollTimer = None

def _pause(self):
        self._paused = True

def _unpause(self):
        self._paused = False
        self._checkPollingState()

def _reschedule(self):
        if not self._paused:
            return self.reactor.callLater(self._currentTimeout, self._pollEvent)

def _pollEvent(self):
        workUnits = 0.
        anyActive = []
        for resource in self._resources:
            if resource.active:
                workUnits += resource.checkWork()
                # Check AFTER work has been done
                if resource.active:
                    anyActive.append(resource)

newTimeout = self._currentTimeout
        if workUnits:
            newTimeout = self._currentTimeout / (workUnits + 1.)
            if newTimeout < MIN_TIMEOUT:
                newTimeout = MIN_TIMEOUT
        else:
            newTimeout = self._currentTimeout * 2.
            if newTimeout > MAX_TIMEOUT:
                newTimeout = MAX_TIMEOUT
        self._currentTimeout = newTimeout
        if anyActive:
            self._pollTimer = self._reschedule()

# If we ever (let's hope not) need the above functionality on UNIX, this could
# be factored into a different module.

import win32pipe
import win32file
import win32api
import pywintypes

@implementer(IPushProducer)
class _PollableReadPipe(_PollableResource):

def __init__(self, pipe, receivedCallback, lostCallback):
        # security attributes for pipes
        self.pipe = pipe
        self.receivedCallback = receivedCallback
        self.lostCallback = lostCallback

def checkWork(self):
        finished = 0
        fullDataRead = []

while 1:
            try:
                buffer, bytesToRead, result = win32pipe.PeekNamedPipe(self.pipe, 1)
                # finished = (result == -1)
                if not bytesToRead:
                    break
                hr, data = win32file.ReadFile(self.pipe, bytesToRead, None)
                fullDataRead.append(data)
            except win32api.error:
                finished = 1
                break

dataBuf = b''.join(fullDataRead)
        if dataBuf:
            self.receivedCallback(dataBuf)
        if finished:
            self.cleanup()
        return len(dataBuf)

def cleanup(self):
        self.deactivate()
        self.lostCallback()

def close(self):
        try:
            win32api.CloseHandle(self.pipe)
        except pywintypes.error:
            # You can't close std handles...?
            pass

def stopProducing(self):
        self.close()

def pauseProducing(self):
        self.deactivate()

def resumeProducing(self):
        self.activate()

FULL_BUFFER_SIZE = 64 * 1024

@implementer(IConsumer)
class _PollableWritePipe(_PollableResource):

def __init__(self, writePipe, lostCallback):
        self.disconnecting = False
        self.producer = None
        self.producerPaused = False
        self.streamingProducer = 0
        self.outQueue = []
        self.writePipe = writePipe
        self.lostCallback = lostCallback
        try:
            win32pipe.SetNamedPipeHandleState(writePipe,
                                              win32pipe.PIPE_NOWAIT,
                                              None,
                                              None)
        except pywintypes.error:
            # Maybe it's an invalid handle.  Who knows.
            pass

def close(self):
        self.disconnecting = True

def bufferFull(self):
        if self.producer is not None:
            self.producerPaused = True
            self.producer.pauseProducing()

def bufferEmpty(self):
        if self.producer is not None and ((not self.streamingProducer) or
                                          self.producerPaused):
            self.producer.producerPaused = False
            self.producer.resumeProducing()
            return True
        return False

# almost-but-not-quite-exact copy-paste from abstract.FileDescriptor... ugh

def registerProducer(self, producer, streaming):
        """Register to receive data from a producer.

This sets this selectable to be a consumer for a producer.  When this
        selectable runs out of data on a write() call, it will ask the producer
        to resumeProducing(). A producer should implement the IProducer
        interface.

FileDescriptor provides some infrastructure for producer methods.
        """
        if self.producer is not None:
            raise RuntimeError(
                "Cannot register producer %s, because producer %s was never "
                "unregistered." % (producer, self.producer))
        if not self.active:
            producer.stopProducing()
        else:
            self.producer = producer
            self.streamingProducer = streaming
            if not streaming:
                producer.resumeProducing()

def unregisterProducer(self):
        """Stop consuming data from a producer, without disconnecting.
        """
        self.producer = None

def writeConnectionLost(self):
        self.deactivate()
        try:
            win32api.CloseHandle(self.writePipe)
        except pywintypes.error:
            # OMG what
            pass
        self.lostCallback()

def writeSequence(self, seq):
        """
        Append a C{list} or C{tuple} of bytes to the output buffer.

@param seq: C{list} or C{tuple} of C{str} instances to be appended to
            the output buffer.

@raise TypeError: If C{seq} contains C{unicode}.
        """
        if unicode in map(type, seq):
            raise TypeError("Unicode not allowed in output buffer.")
        self.outQueue.extend(seq)

def write(self, data):
        """
        Append some bytes to the output buffer.

@param data: C{str} to be appended to the output buffer.
        @type data: C{str}.

@raise TypeError: If C{data} is C{unicode} instead of C{str}.
        """
        if isinstance(data, unicode):
            raise TypeError("Unicode not allowed in output buffer.")
        if self.disconnecting:
            return
        self.outQueue.append(data)
        if sum(map(len, self.outQueue)) > FULL_BUFFER_SIZE:
            self.bufferFull()

def checkWork(self):
        numBytesWritten = 0
        if not self.outQueue:
            if self.disconnecting:
                self.writeConnectionLost()
                return 0
            try:
                win32file.WriteFile(self.writePipe, b'', None)
            except pywintypes.error:
                self.writeConnectionLost()
                return numBytesWritten
        while self.outQueue:
            data = self.outQueue.pop(0)
            errCode = 0
            try:
                errCode, nBytesWritten = win32file.WriteFile(self.writePipe,
                                                             data, None)
            except win32api.error:
                self.writeConnectionLost()
                break
            else:
                # assert not errCode, "wtf an error code???"
                numBytesWritten += nBytesWritten
                if len(data) > nBytesWritten:
                    self.outQueue.insert(0, data[nBytesWritten:])
                    break
        else:
            resumed = self.bufferEmpty()
            if not resumed and self.disconnecting:
                self.writeConnectionLost()
        return numBytesWritten

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