Re: [PATCH] Futexes IV (Fast Lightweight Userspace Semaphores)

Peter Svensson
2002-03-05T23:38:25Z

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.

Peter
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