From: René Scharfe <rene.scharfe@lsrfire.ath.cx>
Date: Thu, 23 Nov 2006 15:45:09 GMT
Subject: Re: sizeof(struct ...)
Message-ID: <4565C205.8050300@lsrfire.ath.cx>
In-Reply-To: <4565A866.8020201@shadowen.org>

Andy Whitcroft schrieb:
> This structure represents an on-disk/on-the-wire thing, should we not be
> specifying it in some architecture neutral way?  You are going to get
> the length right in the case of tail padding but not in the face of any
> other padding internally.
> 
> You see packing attributes applied to similar things in the kernel.
> Perhaps they are relevant here?
> Is there not some kind of attribute thing we can apply to this structure
> to prevent the padding?  You see that in the kernel from time to time.
> 
> struct foo {
> } __attribute__((packed));

Yes, that would be nice, but unfortunately __attribute__ is no standard
C.  Is there really a compiler that inserts padding between arrays of
unsigned chars?

Thanks,