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Subject: Re: light weight user level semaphores
To: torvalds@transmeta.com (Linus Torvalds)
Date: Thu, 19 Apr 2001 17:38:23 +0100 (BST)
Cc: alonz@nolaviz.org (Alon Ziv),
        linux-kernel@vger.kernel.org (Kernel Mailing List),
        mkravetz@sequent.com (Mike Kravetz),
        drepper@cygnus.com (Ulrich Drepper)
In-Reply-To: <Pine.LNX.4.31.0104190849170.3842-100000@penguin.transmeta.com> from "Linus Torvalds" at Apr 19, 2001 09:03:42 AM
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From: Alan Cox <alan@lxorguk.ukuu.org.uk>
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> can libraries use fast semaphores behind the back of the user? They might
> well want to use the semaphores exactly for things like memory allocator
> locking etc. But libc certainly cant use fd's behind peoples backs.

libc is entitled to, and most definitely does exactly that. Take a look at
things like gethostent, getpwent etc etc.

Alan

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