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Christian Zagrodnick wrote:
> Hi there,
>
> the DB.open method makes me wonder how it works
> (http://svn.zope.org/ZODB/trunk/src/ZODB/DB.py?rev=69551&view=auto)
>
> It locks with self._a() and calls self._connectionMap which locks too. I
> cannot imagine a way this could possibly work.
>
> I guess the lock should be released before the _connectionMap call?
>
> Interestingly both all the tests pass and ZODB works...
Note the following in the __init__()::
# Allocate lock.
x = threading.RLock()
self._a = x.acquire
self._r = x.release
The lock is a "reentrant" lock[1], which means that subsequent locks
from within the same thread do not deadlock; instead, they increment
the lock count.
[1] http://docs.python.org/lib/module-threading.html#l2h-3418
Tres.
- --
===================================================================
Tres Seaver +1 202-558-7113 [EMAIL PROTECTED]
Palladion Software "Excellence by Design" http://palladion.com
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