| # (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())) |
| |