threadpool.py 0.9 - Thread control utilities

[Bryn Keller]

I'm pleased to announce the release of threadpool.py version 0.9,
released under the GNU LGPL.

threadpool.py can be obtained from:

http://sourceforge.net/projects/xoltar-toolkit/


Release Name: 0.9

Notes:
This module uses the threading and Queue modules to create a pool of
reusable
threads.

After creating an instance of ThreadPool, one queues functions to be
excecuted. The pool dispatches the functions to the waiting threads,
which
call them.

When queueing a function on the pool with *pool*.put(), an instance
of ReturnValue is returned. ReturnValue is a subclass of
functional.Lazy, and
can be used in any context that a regular lazy expression can. When
evaluating
a ReturnValue, the evaluating thread will block until the other thread
has
completed its work and loaded the return value of the function into the
ReturnValue instance.

VLocks are an alternative to RLocks which include a visible queue
threads waiting
for the lock.

lock, unlock, getLockFor, and deleteLockFor work with a module-level
dictionary of objects to locks, and can be more convenient than working
with
lock objects directly.

Locked and Async are callable wrappers around a function. Async calls
return
immediately after queueing their function on a thread pool, while Locked
calls
first acquire the lock they were passed on creation, call their
function, and
release the lock.




Changes:
10/18/2000:
    Release 0.9
    Fixed endless loop bug when an exception was raised.

10/12/2000:
    Move to SourceForge, release 0.8


--
Bryn Keller
xoltar@starship.python.net