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/proc/self/root/proc/self/root/lib64/python3.9/multiprocessing/dummy

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connection.py1.6 KB · 76 lines
## Analogue of `multiprocessing.connection` which uses queues instead of sockets## multiprocessing/dummy/connection.py## Copyright (c) 2006-2008, R Oudkerk# Licensed to PSF under a Contributor Agreement.# __all__ = [ 'Client', 'Listener', 'Pipe' ] from queue import Queue  families = [None]  class Listener(object):     def __init__(self, address=None, family=None, backlog=1):        self._backlog_queue = Queue(backlog)     def accept(self):        return Connection(*self._backlog_queue.get())     def close(self):        self._backlog_queue = None     @property    def address(self):        return self._backlog_queue     def __enter__(self):        return self     def __exit__(self, exc_type, exc_value, exc_tb):        self.close()  def Client(address):    _in, _out = Queue(), Queue()    address.put((_out, _in))    return Connection(_in, _out)  def Pipe(duplex=True):    a, b = Queue(), Queue()    return Connection(a, b), Connection(b, a)  class Connection(object):     def __init__(self, _in, _out):        self._out = _out        self._in = _in        self.send = self.send_bytes = _out.put        self.recv = self.recv_bytes = _in.get     def poll(self, timeout=0.0):        if self._in.qsize() > 0:            return True        if timeout <= 0.0:            return False        with self._in.not_empty:            self._in.not_empty.wait(timeout)        return self._in.qsize() > 0     def close(self):        pass     def __enter__(self):        return self     def __exit__(self, exc_type, exc_value, exc_tb):        self.close()