2 # Analogue of `multiprocessing.connection` which uses queues instead of sockets
4 # multiprocessing/dummy/connection.py
6 # Copyright (c) 2006-2008, R Oudkerk --- see COPYING.txt
9 __all__ = [ 'Client', 'Listener', 'Pipe' ]
11 from Queue import Queue
17 class Listener(object):
19 def __init__(self, address=None, family=None, backlog=1):
20 self._backlog_queue = Queue(backlog)
23 return Connection(*self._backlog_queue.get())
26 self._backlog_queue = None
28 address = property(lambda self: self._backlog_queue)
32 _in, _out = Queue(), Queue()
33 address.put((_out, _in))
34 return Connection(_in, _out)
37 def Pipe(duplex=True):
38 a, b = Queue(), Queue()
39 return Connection(a, b), Connection(b, a)
42 class Connection(object):
44 def __init__(self, _in, _out):
47 self.send = self.send_bytes = _out.put
48 self.recv = self.recv_bytes = _in.get
50 def poll(self, timeout=0.0):
51 if self._in.qsize() > 0:
55 self._in.not_empty.acquire()
56 self._in.not_empty.wait(timeout)
57 self._in.not_empty.release()
58 return self._in.qsize() > 0