# # Support for the API of the multiprocessing package using threads # # multiprocessing/dummy/__init__.py # # Copyright (c) 2006-2008, R Oudkerk # Licensed to PSF under a Contributor Agreement. # __all__ = [ 'Process', 'current_process', 'active_children', 'freeze_support', 'Lock', 'RLock', 'Semaphore', 'BoundedSemaphore', 'Condition', 'Event', 'Barrier', 'Queue', 'Manager', 'Pipe', 'Pool', 'JoinableQueue' ] # # Imports # import threading import sys import weakref import array from .connection import Pipe from threading import Lock, RLock, Semaphore, BoundedSemaphore from threading import Event, Condition, Barrier 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): if self._parent is not current_process(): raise RuntimeError( "Parent is {0!r} but current_process is {1!r}".format( self._parent, 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 # # # 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 = list(self.__dict__.items()) temp = [] for name, value in items: if not name.startswith('_'): temp.append('%s=%r' % (name, value)) temp.sort() return '%s(%s)' % (self.__class__.__name__, ', '.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 @property def value(self): return self._value @value.setter def value(self, value): self._value = value 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 ..pool import ThreadPool return ThreadPool(processes, initializer, initargs) JoinableQueue = Queue