61 lines
1.7 KiB
Python
61 lines
1.7 KiB
Python
# -*- coding: utf-8 -*-
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# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright (C) 2012-2013 Yahoo! Inc. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import functools
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from taskflow.utils import threading_utils
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def wraps(fn):
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"""This will not be needed in python 3.2 or greater which already has this
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built-in to its functools.wraps method.
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"""
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def wrapper(f):
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f = functools.wraps(fn)(f)
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f.__wrapped__ = getattr(fn, '__wrapped__', fn)
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return f
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return wrapper
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def locked(*args, **kwargs):
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def decorator(f):
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attr_name = kwargs.get('lock', '_lock')
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@wraps(f)
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def wrapper(*args, **kwargs):
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lock = getattr(args[0], attr_name)
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if isinstance(lock, (tuple, list)):
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lock = threading_utils.MultiLock(locks=list(lock))
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with lock:
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return f(*args, **kwargs)
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return wrapper
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# This is needed to handle when the decorator has args or the decorator
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# doesn't have args, python is rather weird here...
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if kwargs or not args:
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return decorator
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else:
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if len(args) == 1:
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return decorator(args[0])
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else:
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return decorator
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