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70 lines
1.8 KiB
Python
70 lines
1.8 KiB
Python
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#!/usr/bin/env python
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#
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# Copyright 2007 Doug Hellmann.
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#
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#
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# All Rights Reserved
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#
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# Permission to use, copy, modify, and distribute this software and
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# its documentation for any purpose and without fee is hereby
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# granted, provided that the above copyright notice appear in all
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# copies and that both that copyright notice and this permission
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# notice appear in supporting documentation, and that the name of Doug
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# Hellmann not be used in advertising or publicity pertaining to
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# distribution of the software without specific, written prior
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# permission.
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#
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# DOUG HELLMANN DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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# INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN
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# NO EVENT SHALL DOUG HELLMANN BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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# CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
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# OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
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# NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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# CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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#
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from __future__ import with_statement
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"""Lock wrapper for cache storage which do not permit multi-threaded access.
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"""
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__module_id__ = "$Id$"
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#
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# Import system modules
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#
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import threading
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#
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# Import local modules
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#
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#
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# Module
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#
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class CacheStorageLock:
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"""Lock wrapper for cache storage which do not permit multi-threaded access.
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"""
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def __init__(self, shelf):
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self.lock = threading.Lock()
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self.shelf = shelf
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return
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def __getitem__(self, key):
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with self.lock:
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return self.shelf[key]
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def get(self, key, default=None):
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with self.lock:
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try:
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return self.shelf[key]
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except KeyError:
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return default
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def __setitem__(self, key, value):
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with self.lock:
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self.shelf[key] = value
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