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Date: Tue, 5 Mar 2002 15:50:38 -0800 (PST)
From: Davide Libenzi <davidel@xmailserver.org>
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To: Peter Svensson <petersv@psv.nu>
cc: Hubertus Franke <frankeh@watson.ibm.com>,
        Rusty Russell <rusty@rustcorp.com.au>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] Futexes IV (Fast Lightweight Userspace Semaphores)
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On Wed, 6 Mar 2002, Peter Svensson wrote:

> On Tue, 5 Mar 2002, Davide Libenzi wrote:
>
> > > I believe not all machine have  alignof  == sizeof
> >
> > Yes but this is always true   alignof >= sizeof
>
> No, this is not true. As the gcc info pages says:
>    For example, if the target machine requires a `double' value to be
>    aligned on an 8-byte boundary, then `__alignof__ (double)' is 8.  This
>    is true on many RISC machines.  On more traditional machine designs,
>    `__alignof__ (double)' is 4 or even 2.
> A later example shows situations where alignof>sizeof.

Yes, it's true.



- Davide



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