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# (c) 2005 Ian Bicking and contributors; written for Paste (http://pythonpaste.org)
# Licensed under the MIT license: http://www.opensource.org/licenses/mit-license.php
"""
Implementation of thread-local storage, for Python versions that don't
have thread local storage natively.
"""
try:
import threading
except ImportError:
# No threads, so "thread local" means process-global
class local(object):
pass
else:
try:
local = threading.local
except AttributeError:
# Added in 2.4, but now we'll have to define it ourselves
import thread
class local(object):
def __init__(self):
self.__dict__['__objs'] = {}
def __getattr__(self, attr, g=thread.get_ident):
try:
return self.__dict__['__objs'][g()][attr]
except KeyError:
raise AttributeError(
"No variable %s defined for the thread %s"
% (attr, g()))
def __setattr__(self, attr, value, g=thread.get_ident):
self.__dict__['__objs'].setdefault(g(), {})[attr] = value
def __delattr__(self, attr, g=thread.get_ident):
try:
del self.__dict__['__objs'][g()][attr]
except KeyError:
raise AttributeError(
"No variable %s defined for thread %s"
% (attr, g()))
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