From: Stelian Pop <stelian.pop@fr.alcove.com>
To: Manfred Spraul <manfred@colorfullife.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Use semaphore for producer/consumer case...
Date: Mon, 26 Mar 2001 16:54:25 +0200 [thread overview]
Message-ID: <20010326165425.G15689@come.alcove-fr> (raw)
In-Reply-To: <000d01c0b3c7$e232ae90$5517fea9@local>
In-Reply-To: <000d01c0b3c7$e232ae90$5517fea9@local>; from manfred@colorfullife.com on Fri, Mar 23, 2001 at 07:34:07PM +0100
On Fri, Mar 23, 2001 at 07:34:07PM +0100, Manfred Spraul wrote:
> > consumer()
>
> > /* Let's wait for 10 items */
> > atomic_set(&sem->count, -10);
>
> 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 ?
Stelian.
--
Stelian Pop <stelian.pop@fr.alcove.com>
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next prev parent reply other threads:[~2001-03-26 14:55 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-03-23 18:34 Manfred Spraul
2001-03-26 14:54 ` Stelian Pop [this message]
2001-03-26 17:12 ` Manfred Spraul
2001-03-27 7:57 ` Stelian Pop
-- strict thread matches above, loose matches on Subject: below --
2001-03-23 12:07 Stelian Pop
2001-03-23 23:52 ` Nigel Gamble
2001-03-26 14:52 ` Stelian Pop
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