From: Robin Doer <robin@robind.de>
To: Ankit Jain <ankitjain1580@yahoo.com>
Cc: linux-newbie@vger.kernel.org
Subject: Re: Mutual Exclusion in Kernel
Date: Wed, 6 Oct 2004 16:04:12 +0200 [thread overview]
Message-ID: <200410061604.16497.robin@robind.de> (raw)
In-Reply-To: <20041006085523.35414.qmail@web52903.mail.yahoo.com>
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No!
You have to write your own busy-waiting-algorithm while the operating system
provides you a semaphore.
A busy-waiting-algorithm can be compared with a two-state-semaphore (lock or
unlock) but the concept of the semaphore is must more powerful. In theory an
infinite number of states is possible. Thus you can control the access to a
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
> >
> > -
> > To unsubscribe from this list: send the line
> > "unsubscribe linux-newbie" 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.linux-learn.org/faqs
>
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next parent reply other threads:[~2004-10-06 14:04 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20041006085523.35414.qmail@web52903.mail.yahoo.com>
2004-10-06 14:04 ` Robin Doer [this message]
[not found] <577528CFDFEFA643B3324B88812B57FE2D9B67@inhyms21.ca.com>
2004-10-06 5:50 ` Mutual Exclusion in Kernel Ankit Jain
2004-10-06 8:43 ` Robin Doer
2004-10-07 5:18 ` kernel kernel
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