Messages in this thread |  | | | Date | Tue, 27 Mar 2001 09:57:02 +0200 | | From | Stelian Pop <> | | Subject | Re: Use semaphore for producer/consumer case... |
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On Mon, Mar 26, 2001 at 07:12:55PM +0200, Manfred Spraul wrote:
> > > That doesn't work, at least the i386 semaphore implementation > doesn't > > > support semaphore counts < 0. > > > > Does that mean that kernel semaphore can not be used for something > > else than mutual exclusion ? > > > It's a bit better: counts >= 0 are supported, i.e. you can call up() > before down(), and that's used in several places.
I see... it's somewhat different than the classical semaphore implementation, but usable anyway.
> The for loop that Nigel proposed should solve your problem. Multiple > up's are handled correctly.
Now I understand his suggestion. Thanks to both of you.
Stelian. -- Stelian Pop <stelian.pop@fr.alcove.com> |------------- Ingénieur Informatique Libre --------------| | Alcôve - http://www.alcove.com - Tel: +33 1 49 22 68 00 | |----------- Alcôve, l'informatique est libre ------------| - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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