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Diffstat (limited to 'lib/python2.7/multiprocessing/dummy/__init__.py')
-rw-r--r-- | lib/python2.7/multiprocessing/dummy/__init__.py | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/lib/python2.7/multiprocessing/dummy/__init__.py b/lib/python2.7/multiprocessing/dummy/__init__.py new file mode 100644 index 0000000..b7abde8 --- /dev/null +++ b/lib/python2.7/multiprocessing/dummy/__init__.py @@ -0,0 +1,153 @@ +# +# Support for the API of the multiprocessing package using threads +# +# multiprocessing/dummy/__init__.py +# +# Copyright (c) 2006-2008, R Oudkerk +# All rights reserved. +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions +# are met: +# +# 1. Redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer. +# 2. Redistributions in binary form must reproduce the above copyright +# notice, this list of conditions and the following disclaimer in the +# documentation and/or other materials provided with the distribution. +# 3. Neither the name of author nor the names of any contributors may be +# used to endorse or promote products derived from this software +# without specific prior written permission. +# +# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND +# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE +# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +# SUCH DAMAGE. +# + +__all__ = [ + 'Process', 'current_process', 'active_children', 'freeze_support', + 'Lock', 'RLock', 'Semaphore', 'BoundedSemaphore', 'Condition', + 'Event', 'Queue', 'Manager', 'Pipe', 'Pool', 'JoinableQueue' + ] + +# +# Imports +# + +import threading +import sys +import weakref +import array +import itertools + +from multiprocessing import TimeoutError, cpu_count +from multiprocessing.dummy.connection import Pipe +from threading import Lock, RLock, Semaphore, BoundedSemaphore +from threading import Event +from Queue import Queue + +# +# +# + +class DummyProcess(threading.Thread): + + def __init__(self, group=None, target=None, name=None, args=(), kwargs={}): + threading.Thread.__init__(self, group, target, name, args, kwargs) + self._pid = None + self._children = weakref.WeakKeyDictionary() + self._start_called = False + self._parent = current_process() + + def start(self): + assert self._parent is current_process() + self._start_called = True + if hasattr(self._parent, '_children'): + self._parent._children[self] = None + threading.Thread.start(self) + + @property + def exitcode(self): + if self._start_called and not self.is_alive(): + return 0 + else: + return None + +# +# +# + +class Condition(threading._Condition): + notify_all = threading._Condition.notify_all.im_func + +# +# +# + +Process = DummyProcess +current_process = threading.current_thread +current_process()._children = weakref.WeakKeyDictionary() + +def active_children(): + children = current_process()._children + for p in list(children): + if not p.is_alive(): + children.pop(p, None) + return list(children) + +def freeze_support(): + pass + +# +# +# + +class Namespace(object): + def __init__(self, **kwds): + self.__dict__.update(kwds) + def __repr__(self): + items = self.__dict__.items() + temp = [] + for name, value in items: + if not name.startswith('_'): + temp.append('%s=%r' % (name, value)) + temp.sort() + return 'Namespace(%s)' % str.join(', ', temp) + +dict = dict +list = list + +def Array(typecode, sequence, lock=True): + return array.array(typecode, sequence) + +class Value(object): + def __init__(self, typecode, value, lock=True): + self._typecode = typecode + self._value = value + def _get(self): + return self._value + def _set(self, value): + self._value = value + value = property(_get, _set) + def __repr__(self): + return '<%s(%r, %r)>'%(type(self).__name__,self._typecode,self._value) + +def Manager(): + return sys.modules[__name__] + +def shutdown(): + pass + +def Pool(processes=None, initializer=None, initargs=()): + from multiprocessing.pool import ThreadPool + return ThreadPool(processes, initializer, initargs) + +JoinableQueue = Queue |