From mboxrd@z Thu Jan  1 00:00:00 1970
From: Robin Doer <robin@robind.de>
Subject: Re: Mutual Exclusion in Kernel
Date: Wed, 6 Oct 2004 16:04:12 +0200
Sender: linux-newbie-owner@vger.kernel.org
Message-ID: <200410061604.16497.robin@robind.de>
References: <20041006085523.35414.qmail@web52903.mail.yahoo.com>
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To: Ankit Jain <ankitjain1580@yahoo.com>
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No!

You have to write your own busy-waiting-algorithm while the operating syste=
m=20
provides you a semaphore.

A busy-waiting-algorithm can be compared with a two-state-semaphore (lock o=
r=20
unlock) but the concept of the semaphore is must more powerful. In theory a=
n=20
infinite number of states is possible. Thus you can control the access to a=
=20
resource in different levels.

Am Mittwoch, 6. Oktober 2004 10:55 schrieben Sie:
> but this is like semaphore?
>
> thanks again
>
> ankit
>
>  --- Robin Doer <robin@robind.de> wrote:
> > Good morning!
> >
> > Ankit Jain (ankitjain1580@yahoo.com) schrieb:
> > > hi
> > >
> > > what is spin lock?
> >
> > http://en.wikipedia.org/wiki/Spin_lock
> >
> > aka "busy waiting". A thread is polling <something>
> > until <something> says
> > "ok" and the thread continues working.
> >
> > > thanks
> > >
> > > ankit
> >
> > Have fun,
> > Robin
> >
> > -
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>
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