Date: Thu, 11 May 2000 03:08:02 +1000 (EST) From: Bruce Evans <bde@zeta.org.au> To: Doug Rabson <dfr@nlsystems.com> Cc: Mike Smith <msmith@FreeBSD.ORG>, obrien@FreeBSD.ORG, freebsd-current@FreeBSD.ORG Subject: Re: One more question (different now) Message-ID: <Pine.BSF.4.21.0005110258090.10206-100000@besplex.bde.org> In-Reply-To: <Pine.BSF.4.21.0005100910590.47945-100000@salmon.nlsystems.com>
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On Wed, 10 May 2000, Doug Rabson wrote:
> You can suppress the warning if you cast to uintptr_t first. Pretty ugly
> though.
For (almost) full uglyness and correctness, you have to cast to
"volatile void *" first, then back via "void *":
#define unvolstructfoop(sfp) \
((struct foo *)(void *)(uintptr_t)(volatile void *)(sfp))
For full uglyness, add an ifdef to test if uintptr_t exists (see the C99
standard), and backup methods for when it doesn't exist.
Bruce
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