Synchronization mixin in Python anyone?

[Sean McGrath]

Gustavo,

Thanks. That is helpful.

regards,
Sean

[Sean McGrath]

 >> The Zope system contains a Synchronization mixin class
 >> for thread synchronization written in C. Derive a class from
 >> Synchronized
 >> and any mythod calls on an instance of the class are
 >> thread safe.
 >>
 >> Does anybody know of any Python implementation? The C version
 >> exhibits "interesting" refcounting behavior I need to work around.

[Gustavo Cordova]
 >Hmmm... interesting problem. I've been playing with a function
 >synchronization class lately, just toying with the idea. I don't
 >know if anybody wants it, but here's the basic skeleton:

 >### SynchronizedCall
 >import thread

 >class SynchronizedCall:
 >   def __init__(self, function, *args, **kw):
 >      self._lock = thread.Lock()
 >      self._args = args
 >      self._kw = kw
 >      self._function = function

 >  def __call__(self, *args, **kw):
 >      self._lock.acquire()
 >      try:
 >         args = self._args + args
 >         kw.update(self._kw)
 >         result = self._function(*args, **kw)

 >      ## In case of an exception, release lock first.
 >     except:
 >       self._lock.release()
 >         raise

 >      self._lock.release()
 >      return result