Date: Thu, 20 Jan 2000 00:45:51 +0100 From: Anton Berezin <tobez@plab.ku.dk> To: Satoshi Asami <asami@cs.berkeley.edu> Cc: current@FreeBSD.ORG Subject: Re: sigisempty? Message-ID: <20000120004551.A13892@plab.ku.dk> In-Reply-To: <200001191503.HAA04869@silvia.hip.berkeley.edu>; from asami@cs.berkeley.edu on Wed, Jan 19, 2000 at 07:03:04AM -0800 References: <200001191503.HAA04869@silvia.hip.berkeley.edu>
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On Wed, Jan 19, 2000 at 07:03:04AM -0800, Satoshi Asami wrote:
> How do I test if sigset_t is empty in -current? The xview sources
> have this macro:
>
> #define sigisempty(s) (!(*(s)))
>
> which is ok for the old sigset_t (unsigned int) but obviously won't
> work for the new one since it's a struct.
The very same file nfty.h already has a hack for SVR4:
#ifdef SVR4
#define sigisempty(s) (!(((s)->__sigbits[0]) | ((s)->__sigbits[1]) \
| ((s)->__sigbits[2]) | ((s)->__sigbits[3])))
When I compiled xview on a -current machine I just did it the very same
hacky way:
#define sigisempty(s) (!(((s)->__bits[0]) | ((s)->__bits[1]) \
| ((s)->__bits[2]) | ((s)->__bits[3])))
Of course, the #if for FreeBSD and its version is necessary.
Cheers,
--
Anton Berezin <tobez@plab.ku.dk>
The Protein Laboratory, University of Copenhagen
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