From owner-freebsd-current  Wed Jan 19  8:57:49 2000
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Date: Wed, 19 Jan 2000 11:57:45 -0500 (EST)
From: Garrett Wollman <wollman@khavrinen.lcs.mit.edu>
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To: asami@cs.berkeley.edu (Satoshi Asami)
Cc: current@FreeBSD.ORG
Subject: sigisempty?
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<<On Wed, 19 Jan 2000 07:03:04 -0800 (PST), asami@cs.berkeley.edu (Satoshi Asami) said:

> 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.

int
sigisempty(sigset_t *my_sigset)
{
	static sigset_t empty_ss;
	static int emptied;

	if (!emptied) {
		sigemptyset(&empty_ss);
		emptied++;
	}

	return (memcmp(my_sigset, &empty_ss, sizeof empty_ss) == 0);
}

-GAWollman

--
Garrett A. Wollman   | O Siem / We are all family / O Siem / We're all the same
wollman@lcs.mit.edu  | O Siem / The fires of freedom 
Opinions not those of| Dance in the burning flame
MIT, LCS, CRS, or NSA|                     - Susan Aglukark and Chad Irschick


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