'Create new in, out, etc. queues, returned as a tuple.'

def create_process_queues(self):

    inq = _SimpleQueue(wnonblock=True)
    outq = _SimpleQueue(rnonblock=True)
    synq = None
    assert isblocking(inq._reader)
    assert (not isblocking(inq._writer))
    assert (not isblocking(outq._reader))
    assert isblocking(outq._writer)
    if self.synack:
        synq = _SimpleQueue(wnonblock=True)
        assert isblocking(synq._reader)
        assert (not isblocking(synq._writer))
    return (inq, outq, synq)
