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Re-entrant lock; can be locked multiple times by same thread
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Methods
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__init__
_doAcquire
attempt
locked
obtain
release
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__init__
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__init__ ( self )
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_doAcquire
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_doAcquire ( self, blocking )
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attempt
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attempt ( self )
Nonblocking, nestable attempt to acquire; returns success flag
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locked
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locked ( self )
Is this lock owned by the current thread?
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obtain
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obtain ( self )
Blocking, nestable wait to acquire; success unless error
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release
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release ( self )
Release one level of lock nesting; must be locked() when called
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Exceptions
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RuntimeError, "release() of un-acquire()d lock"
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