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47 lines
969 B
Python
47 lines
969 B
Python
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# -*- test-case-name: twisted._threads.test.test_convenience -*-
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# Copyright (c) Twisted Matrix Laboratories.
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# See LICENSE for details.
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"""
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Common functionality used within the implementation of various workers.
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"""
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from __future__ import absolute_import, division, print_function
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from ._ithreads import AlreadyQuit
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class Quit(object):
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"""
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A flag representing whether a worker has been quit.
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@ivar isSet: Whether this flag is set.
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@type isSet: L{bool}
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"""
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def __init__(self):
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"""
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Create a L{Quit} un-set.
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"""
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self.isSet = False
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def set(self):
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"""
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Set the flag if it has not been set.
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@raise AlreadyQuit: If it has been set.
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"""
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self.check()
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self.isSet = True
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def check(self):
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"""
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Check if the flag has been set.
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@raise AlreadyQuit: If it has been set.
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"""
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if self.isSet:
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raise AlreadyQuit()
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