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From: Yvan M. <yva...@si...> - 2000-03-30 16:32:16
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"Robert E. Minsk" wrote:
>
> I find that I have several programs that rely on at base set of
> programs. Lets say I have some modules called Common, Maya,
> Composer, Paint. Maya, Composer, and Paint all have the base module
> Common as a prereq. What I would like to do in Common is implement
> some kind of reference counting scheme.
>
> When module Common is loaded the first time it executes all the
> "load" commands and sets it's reference count to 1. Each additional
> time the module Common is loaded only the reference count is
> incremented. When the module Common is unloaded the reference count
> is decremented. When the reference count reaches zero then the
> "unload" commands are executed.
>
> So going back to my example:
> module add Maya - This internally adds Common. Assuming module
> Common was not previously loaded, Common is now
> loaded and the reference count is 1.
> module add Composer - This internally adds Common. Only the
> reference count is incremented. The reference
> count is now 2.
> module rm Maya - This internally removes Common. The reference
> count is now 1.
> module add Paint - This internally adds Common. The reference
> count is now 2.
> module rm Paint - This internally removes Common. The reference
> count is now 1.
> module rm Composrer - This internally removes Common. The reference
> count is now 0 so Common's "unload" commands
> are now run.
>
> I have not thought what would happen if I do a module switch on
> Common.
> Robert Minsk Centropolis Effects, LLC.
> eg...@ce... 10950 Washington Blvd., Studio B
> Culver City, Ca. 90232-4025
Tired of receiving your e-mail without being in your mailing list.
--
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______(_)__(_)________
Yvan Michaud CSA
Analyste en systeme
Sisca Inc.
yva...@si...
www.sisca.com
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