On Sun, 23 Apr 2006, Tino Dai wrote:
> I am wondering if you could lock a specific variable with thread
> locking. Let me illustrate:
>
> def ftpQueuePut(filename="")::
> if len(filename) > 0:
> try:
> fileQueue.put(filename,True,1) #Variable that I would like to
> lock
> except Queue.full:
> print "Queue is full"
> else:
> pass
>
> def ftpQueueGet():
> try:
> filename=fileQueue.get(True,1) #Variable that I would like to
> lock
> return filename
> except Queue.Empty:
> pass
Hi Tino,
I'm not quite sure I get it, but ok. *grin* I'll assume that fileQueue is
an instance of the Queue class:
http://www.python.org/doc/lib/module-Queue.html
If so: why not allow fileQueue to grow unbounded?
> Presently, the only way that I can see to do this using Python is to
> combine the two functions into one and lock and unlock the entire thing
> . That doesn't seem efficient and/or elegant to me. Any pointers about
> this?
Do you know about the thread-locking primitives? There are a few kinds
provided by Python's threading module:
http://www.python.org/doc/lib/module-threading.html
Are you already familiar with the concept of a RLock or a Lock?
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