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Viewing changes to Epsilon/epsilon/hotfixes/internet_task_clock.py

  • Committer: Jean-Paul Calderone
  • Date: 2014-06-29 20:33:04 UTC
  • mfrom: (2749.1.1 remove-epsilon-1325289)
  • Revision ID: exarkun@twistedmatrix.com-20140629203304-gdkmbwl1suei4m97
merge lp:~exarkun/divmod.org/remove-epsilon-1325289

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Epsilon/epsilon/hotfixes/internet_task_clock.py
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"""
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Fix from Twisted r20480.
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"""
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from twisted.internet.task import Clock
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from twisted.internet import base
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def callLater(self, when, what, *a, **kw):
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    """
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    Copied from twisted.internet.task.Clock, r20480.  Fixes the bug
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    where the wrong DelayedCall would sometimes be returned.
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    """
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    dc =  base.DelayedCall(self.seconds() + when,
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                           what, a, kw,
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                           self.calls.remove,
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                           lambda c: None,
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                           self.seconds)
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    self.calls.append(dc)
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    self.calls.sort(lambda a, b: cmp(a.getTime(), b.getTime()))
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    return dc
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def clockIsBroken():
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    """
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    Returns whether twisted.internet.task.Clock has the bug that
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    returns the wrong DelayedCall or not.
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    """
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    clock = Clock()
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    dc1 = clock.callLater(10, lambda: None)
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    dc2 = clock.callLater(1, lambda: None)
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    if dc1 is dc2:
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        return True
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    else:
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        return False
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def install():
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    """
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    Insert the fixed callLater method.
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    """
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    Clock.callLater = callLater