123 lines
4.5 KiB
Python
123 lines
4.5 KiB
Python
# -*- coding: utf-8 -*-
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##############################################################################
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#
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# OpenERP, Open Source Management Solution
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# Copyright (C) 2004-2009 Tiny SPRL (<http://tiny.be>).
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# Copyright (C) 2010 OpenERP s.a. (<http://openerp.com>).
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as
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# published by the Free Software Foundation, either version 3 of the
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# License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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##############################################################################
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__all__ = ['partial', 'wraps', 'update_wrapper', 'synchronized']
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try:
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from functools import partial, wraps, update_wrapper
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except ImportError:
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# The functools module doesn't exist in python < 2.5
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# Code taken from python 2.5
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# http://svn.python.org/view/python/tags/r254/Lib/functools.py?view=markup
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def partial(fun, *args, **kwargs):
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""" Partial implementation
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See: http://svn.python.org/view/python/tags/r254/Lib/functools.py
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"""
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def _partial(*args2, **kwargs2):
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return fun(*(args+args2), **dict(kwargs, **kwargs2))
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return _partial
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### --- code from python 2.5
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# update_wrapper() and wraps() are tools to help write
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# wrapper functions that can handle naive introspection
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WRAPPER_ASSIGNMENTS = ('__module__', '__name__', '__doc__')
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WRAPPER_UPDATES = ('__dict__',)
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def update_wrapper(wrapper,
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wrapped,
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assigned = WRAPPER_ASSIGNMENTS,
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updated = WRAPPER_UPDATES):
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"""Update a wrapper function to look like the wrapped function
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wrapper is the function to be updated
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wrapped is the original function
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assigned is a tuple naming the attributes assigned directly
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from the wrapped function to the wrapper function (defaults to
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functools.WRAPPER_ASSIGNMENTS)
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updated is a tuple naming the attributes off the wrapper that
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are updated with the corresponding attribute from the wrapped
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function (defaults to functools.WRAPPER_UPDATES)
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"""
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for attr in assigned:
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setattr(wrapper, attr, getattr(wrapped, attr))
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for attr in updated:
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getattr(wrapper, attr).update(getattr(wrapped, attr, {}))
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# Return the wrapper so this can be used as a decorator via partial()
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return wrapper
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def wraps(wrapped,
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assigned = WRAPPER_ASSIGNMENTS,
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updated = WRAPPER_UPDATES):
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"""Decorator factory to apply update_wrapper() to a wrapper function
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Returns a decorator that invokes update_wrapper() with the decorated
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function as the wrapper argument and the arguments to wraps() as the
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remaining arguments. Default arguments are as for update_wrapper().
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This is a convenience function to simplify applying partial() to
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update_wrapper().
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"""
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return partial(update_wrapper, wrapped=wrapped,
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assigned=assigned, updated=updated)
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def synchronized(lock_attr='_lock'):
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def decorator(func):
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@wraps(func)
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def wrapper(self, *args, **kwargs):
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lock = getattr(self, lock_attr)
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try:
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lock.acquire()
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return func(self, *args, **kwargs)
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finally:
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lock.release()
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return wrapper
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return decorator
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from inspect import getsourcefile
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def frame_codeinfo(fframe, back=0):
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""" Return a (filename, line) pair for a previous frame .
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@return (filename, lineno) where lineno is either int or string==''
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"""
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try:
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if not fframe:
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return ("<unknown>", '')
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for i in range(back):
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fframe = fframe.f_back
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try:
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fname = getsourcefile(fframe)
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except TypeError:
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fname = '<builtin>'
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lineno = fframe.f_lineno or ''
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return (fname, lineno)
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except Exception:
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return ("<unknown>", '')
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# vim:expandtab:smartindent:tabstop=4:softtabstop=4:shiftwidth=4:
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