FM / multiprocessing

/usr/lib64/python2.6/multiprocessing

Name	Size	Mode	Actions
dummy/	-	0755	rm
connection.py	12663	0644	edit dl rm
connection.pyc	14286	0644	edit dl rm
connection.pyo	14136	0644	edit dl rm
forking.py	14538	0644	edit dl rm
forking.pyc	14314	0644	edit dl rm
forking.pyo	14150	0644	edit dl rm
heap.py	5748	0644	edit dl rm
heap.pyc	6516	0644	edit dl rm
heap.pyo	6135	0644	edit dl rm
managers.py	34804	0644	edit dl rm
managers.pyc	38462	0644	edit dl rm
managers.pyo	37848	0644	edit dl rm
pool.py	17699	0644	edit dl rm
pool.pyc	18631	0644	edit dl rm
pool.pyo	18172	0644	edit dl rm
process.py	7904	0644	edit dl rm
process.pyc	9534	0644	edit dl rm
process.pyo	8780	0644	edit dl rm
queues.py	11089	0644	edit dl rm
queues.pyc	11696	0644	edit dl rm
queues.pyo	11593	0644	edit dl rm
reduction.py	5124	0644	edit dl rm
reduction.pyc	6034	0644	edit dl rm
reduction.pyo	6034	0644	edit dl rm
sharedctypes.py	6145	0644	edit dl rm
sharedctypes.pyc	8553	0644	edit dl rm
sharedctypes.pyo	8473	0644	edit dl rm
synchronize.py	8966	0644	edit dl rm
synchronize.pyc	10506	0644	edit dl rm
synchronize.pyo	10168	0644	edit dl rm
util.py	7839	0644	edit dl rm
util.pyc	9738	0644	edit dl rm
util.pyo	9643	0644	edit dl rm
__init__.py	7627	0644	edit dl rm
__init__.pyc	8369	0644	edit dl rm
__init__.pyo	8369	0644	edit dl rm

Edit: /usr/lib64/python2.6/multiprocessing/queues.py (11089B)

#
# Module implementing queues
#
# multiprocessing/queues.py
#
# Copyright (c) 2006-2008, R Oudkerk --- see COPYING.txt
#

__all__ = ['Queue', 'SimpleQueue', 'JoinableQueue']

import sys
import os
import threading
import collections
import time
import atexit
import weakref

from Queue import Empty, Full
import _multiprocessing
from multiprocessing import Pipe
from multiprocessing.synchronize import Lock, BoundedSemaphore, Semaphore, Condition
from multiprocessing.util import debug, info, Finalize, register_after_fork
from multiprocessing.forking import assert_spawning

#
# Queue type using a pipe, buffer and thread
#

class Queue(object):

def __init__(self, maxsize=0):
        if maxsize <= 0:
            maxsize = _multiprocessing.SemLock.SEM_VALUE_MAX
        self._maxsize = maxsize
        self._reader, self._writer = Pipe(duplex=False)
        self._rlock = Lock()
        self._opid = os.getpid()
        if sys.platform == 'win32':
            self._wlock = None
        else:
            self._wlock = Lock()
        self._sem = BoundedSemaphore(maxsize)

self._after_fork()

if sys.platform != 'win32':
            register_after_fork(self, Queue._after_fork)

def __getstate__(self):
        assert_spawning(self)
        return (self._maxsize, self._reader, self._writer,
                self._rlock, self._wlock, self._sem, self._opid)

def __setstate__(self, state):
        (self._maxsize, self._reader, self._writer,
         self._rlock, self._wlock, self._sem, self._opid) = state
        self._after_fork()

def _after_fork(self):
        debug('Queue._after_fork()')
        self._notempty = threading.Condition(threading.Lock())
        self._buffer = collections.deque()
        self._thread = None
        self._jointhread = None
        self._joincancelled = False
        self._closed = False
        self._close = None
        self._send = self._writer.send
        self._recv = self._reader.recv
        self._poll = self._reader.poll

def put(self, obj, block=True, timeout=None):
        assert not self._closed
        if not self._sem.acquire(block, timeout):
            raise Full

self._notempty.acquire()
        try:
            if self._thread is None:
                self._start_thread()
            self._buffer.append(obj)
            self._notempty.notify()
        finally:
            self._notempty.release()

def get(self, block=True, timeout=None):
        if block and timeout is None:
            self._rlock.acquire()
            try:
                res = self._recv()
                self._sem.release()
                return res
            finally:
                self._rlock.release()

else:
            if block:
                deadline = time.time() + timeout
            if not self._rlock.acquire(block, timeout):
                raise Empty
            try:
                if not self._poll(block and (deadline-time.time()) or 0.0):
                    raise Empty
                res = self._recv()
                self._sem.release()
                return res
            finally:
                self._rlock.release()

def qsize(self):
        # Raises NotImplementedError on Mac OSX because of broken sem_getvalue()
        return self._maxsize - self._sem._semlock._get_value()

def empty(self):
        return not self._poll()

def full(self):
        return self._sem._semlock._is_zero()

def get_nowait(self):
        return self.get(False)

def put_nowait(self, obj):
        return self.put(obj, False)

def close(self):
        self._closed = True
        self._reader.close()
        if self._close:
            self._close()

def join_thread(self):
        debug('Queue.join_thread()')
        assert self._closed
        if self._jointhread:
            self._jointhread()

def cancel_join_thread(self):
        debug('Queue.cancel_join_thread()')
        self._joincancelled = True
        try:
            self._jointhread.cancel()
        except AttributeError:
            pass

def _start_thread(self):
        debug('Queue._start_thread()')

# Start thread which transfers data from buffer to pipe
        self._buffer.clear()
        self._thread = threading.Thread(
            target=Queue._feed,
            args=(self._buffer, self._notempty, self._send,
                  self._wlock, self._writer.close),
            name='QueueFeederThread'
            )
        self._thread.daemon = True

debug('doing self._thread.start()')
        self._thread.start()
        debug('... done self._thread.start()')

# On process exit we will wait for data to be flushed to pipe.
        #
        # However, if this process created the queue then all
        # processes which use the queue will be descendants of this
        # process.  Therefore waiting for the queue to be flushed
        # is pointless once all the child processes have been joined.
        created_by_this_process = (self._opid == os.getpid())
        if not self._joincancelled and not created_by_this_process:
            self._jointhread = Finalize(
                self._thread, Queue._finalize_join,
                [weakref.ref(self._thread)],
                exitpriority=-5
                )

# Send sentinel to the thread queue object when garbage collected
        self._close = Finalize(
            self, Queue._finalize_close,
            [self._buffer, self._notempty],
            exitpriority=10
            )

@staticmethod
    def _finalize_join(twr):
        debug('joining queue thread')
        thread = twr()
        if thread is not None:
            thread.join()
            debug('... queue thread joined')
        else:
            debug('... queue thread already dead')

@staticmethod
    def _finalize_close(buffer, notempty):
        debug('telling queue thread to quit')
        notempty.acquire()
        try:
            buffer.append(_sentinel)
            notempty.notify()
        finally:
            notempty.release()

@staticmethod
    def _feed(buffer, notempty, send, writelock, close):
        debug('starting thread to feed data to pipe')
        from .util import is_exiting

nacquire = notempty.acquire
        nrelease = notempty.release
        nwait = notempty.wait
        bpopleft = buffer.popleft
        sentinel = _sentinel
        if sys.platform != 'win32':
            wacquire = writelock.acquire
            wrelease = writelock.release
        else:
            wacquire = None

try:
            while 1:
                nacquire()
                try:
                    if not buffer:
                        nwait()
                finally:
                    nrelease()
                try:
                    while 1:
                        obj = bpopleft()
                        if obj is sentinel:
                            debug('feeder thread got sentinel -- exiting')
                            close()
                            return

if wacquire is None:
                            send(obj)
                        else:
                            wacquire()
                            try:
                                send(obj)
                            finally:
                                wrelease()
                except IndexError:
                    pass
        except Exception, e:
            # Since this runs in a daemon thread the resources it uses
            # may be become unusable while the process is cleaning up.
            # We ignore errors which happen after the process has
            # started to cleanup.
            try:
                if is_exiting():
                    info('error in queue thread: %s', e)
                else:
                    import traceback
                    traceback.print_exc()
            except Exception:
                pass

_sentinel = object()

#
# A queue type which also supports join() and task_done() methods
#
# Note that if you do not call task_done() for each finished task then
# eventually the counter's semaphore may overflow causing Bad Things
# to happen.
#

class JoinableQueue(Queue):

def __init__(self, maxsize=0):
        Queue.__init__(self, maxsize)
        self._unfinished_tasks = Semaphore(0)
        self._cond = Condition()

def __getstate__(self):
        return Queue.__getstate__(self) + (self._cond, self._unfinished_tasks)

def __setstate__(self, state):
        Queue.__setstate__(self, state[:-2])
        self._cond, self._unfinished_tasks = state[-2:]

def put(self, obj, block=True, timeout=None):
        assert not self._closed
        if not self._sem.acquire(block, timeout):
            raise Full

self._notempty.acquire()
        self._cond.acquire()
        try:
            if self._thread is None:
                self._start_thread()
            self._buffer.append(obj)
            self._unfinished_tasks.release()
            self._notempty.notify()
        finally:
            self._cond.release()
            self._notempty.release()

def task_done(self):
        self._cond.acquire()
        try:
            if not self._unfinished_tasks.acquire(False):
                raise ValueError('task_done() called too many times')
            if self._unfinished_tasks._semlock._is_zero():
                self._cond.notify_all()
        finally:
            self._cond.release()

def join(self):
        self._cond.acquire()
        try:
            if not self._unfinished_tasks._semlock._is_zero():
                self._cond.wait()
        finally:
            self._cond.release()

#
# Simplified Queue type -- really just a locked pipe
#

class SimpleQueue(object):

def __init__(self):
        self._reader, self._writer = Pipe(duplex=False)
        self._rlock = Lock()
        if sys.platform == 'win32':
            self._wlock = None
        else:
            self._wlock = Lock()
        self._make_methods()

def empty(self):
        return not self._reader.poll()

def __getstate__(self):
        assert_spawning(self)
        return (self._reader, self._writer, self._rlock, self._wlock)

def __setstate__(self, state):
        (self._reader, self._writer, self._rlock, self._wlock) = state
        self._make_methods()

def _make_methods(self):
        recv = self._reader.recv
        racquire, rrelease = self._rlock.acquire, self._rlock.release
        def get():
            racquire()
            try:
                return recv()
            finally:
                rrelease()
        self.get = get

if self._wlock is None:
            # writes to a message oriented win32 pipe are atomic
            self.put = self._writer.send
        else:
            send = self._writer.send
            wacquire, wrelease = self._wlock.acquire, self._wlock.release
            def put(obj):
                wacquire()
                try:
                    return send(obj)
                finally:
                    wrelease()
            self.put = put

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