Not without looking at the source code... We want to be at least as thread-safe as CPython, with the exception that we have no interest in implementing the equivalent of a "global interpreter lock" :). This particular case is just bad coding on our part. I can't promise you that there aren't other examples, but at least this one is pretty easy to fix.
On Sun, Jan 4, 2009 at 8:58 AM, Brian Merrell <br...@merrells.org> wrote: > Thanks Curt. I've filed a bug report. It makes me a bit nervous realizing > that it isn't entirely transparent when shared memory/objects are being > used. Normally I would think a local instance of hashlib.md5() would be > thread-safe from other local instances. Is there any documentation of what > other modules use global/static instances or other non-thread-safe > implementations in IronPython? > > > On Tue, Dec 30, 2008 at 12:13 PM, Curt Hagenlocher > <c...@hagenlocher.org>wrote: > >> I'm going to guess that this is because we use a static instance >> of MD5CryptoServiceProvider to do the hashing, something which may not be >> thread-safe. It looks like all of the IronPython crypto implementations do >> the same thing, so the SHA functions may have a similar issue. >> Please file this as a bug on Codeplex. >> >> On Sat, Dec 20, 2008 at 1:56 PM, Brian Merrell <br...@merrells.org>wrote: >> >>> I get the following error periodically: >>> >>> Exception in thread Thread-2: >>> Traceback (most recent call last): >>> File "C:\Program Files\IronPython 2.0\Lib\threading.py", line 486, in >>> _Thread__bootstrap_inner >>> self.run() >>> File "initial_ingest.py", line 33, in run >>> md5 = hashlib.md5(contents).hexdigest() >>> SystemError: Hash not valid for use in specified state. >>> >>> I am not sharing a md5() object between threads and have tried to avoid >>> any shared memory issues: >>> >>> >>> class Convert(threading.Thread): >>> def __init__(self, queue): >>> threading.Thread.__init__(self) >>> self.queue = queue >>> def run(self): >>> import hashlib >>> while True: >>> abs_filename = self.queue.get() >>> f = open(abs_filename, "rb") >>> contents = f.read() >>> f.close() >>> md5 = hashlib.md5(contents).hexdigest() >>> print md5, abs_filename >>> self.queue.task_done() >>> >>> Any ideas why this is failing? Thanks, >>> >>> -brian >>> >>> _______________________________________________ >>> Users mailing list >>> Users@lists.ironpython.com >>> http://lists.ironpython.com/listinfo.cgi/users-ironpython.com >>> >>> >> >> _______________________________________________ >> Users mailing list >> Users@lists.ironpython.com >> http://lists.ironpython.com/listinfo.cgi/users-ironpython.com >> >> > > _______________________________________________ > Users mailing list > Users@lists.ironpython.com > http://lists.ironpython.com/listinfo.cgi/users-ironpython.com > >
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