[Zope] Locks?

[Stuart 'Zen' Bishop]

On Thu, 11 Nov 1999, Benno Rice wrote:

> I've got a situation where I'd like to be able to have a mutex lock.
> Unfortunately, I can't use Lock objects out of the thread module as they
> appear to be unpicklable.
> 
> Does Zope have any mutex objects I can use?

If you have your lock as a module level variable, I believe it will
work. Either have all instances sharing the same lock or store a dictionary 
of locks. This should be fine unless you need to maintain a lock between
Zope restarts in which case your lock could be any object with a known id
in a folder (as only one thread can create the object, and the others fail),
and delete it to unlock.

 ___
   //     Zen (alias Stuart Bishop)     Work: zen@cs.rmit.edu.au
  // E N  Senior Systems Alchemist      Play: zen@shangri-la.dropbear.id.au
 //__     Computer Science, RMIT 	 WWW: http://www.cs.rmit.edu.au/~zen