BOUNCE rtl@rtlinux.org: Approval required: (fwd)

[Der Herr Hofrat <der.herr@hofr.at>]

>From owner-rtl Fri May 11 12:51:11 2001
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Date: Fri, 11 May 2001 21:02:25 +0400
From: Michael Barabanov <baraban@fsmlabs.com>
To: Sebastian Bolk <bolk@isr.uni-stuttgart.de>
Cc: "rtl@rtlinux.org" <rtl@rtlinux.org>
Subject: Re: [rtl] Semaphore in different modules
Message-ID: <20010511210225.B750@huevo.fsmlabs.com>
References: <3AFAAD8A.73BDD8AC@isr.uni-stuttgart.de>
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In-Reply-To: <3AFAAD8A.73BDD8AC@isr.uni-stuttgart.de>; from bolk@isr.uni-stuttgart.de on Thu, May 10, 2001 at 05:02:34PM +0200
Organization: FSMLabs

Hello,

> I'm using RTlinux 3.0 with kernel 2.4.1.
> Is there a way to have different modules using the same semaphore?

Yes. Module 1:
sem_t semaphore;
...
sem_wait(&semaphore):

Module 2:
extern sem_t semaphore;
sem_post(&semaphore):

Module that defines the semaphore has to be loaded first of course.

Michael..