date and time created 91/04/12 13:40:37 by bostic

[unix-history] / usr / src / lib / libc / gen / sigsetops.c

/*-
* Copyright (c) 1989 The Regents of the University of California.
* All rights reserved.
*
* %sccs.include.redist.c%
*
*      @(#)sigsetops.c 5.3 (Berkeley) %G%
*/

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)sigsetops.c 5.3 (Berkeley) %G%";
#endif /* LIBC_SCCS and not lint */

#include <sys/signal.h>

#undef sigemptyset
#undef sigfillset
#undef sigaddset
#undef sigdelset
#undef sigismember

sigemptyset(set)
       sigset_t *set;
{
       *set = 0;
       return (0);
}

sigfillset(set)
       sigset_t *set;
{
       *set = ~(sigset_t)0;
       return (0);
}

sigaddset(set, signo)
       sigset_t *set;
       int signo;
{
       *set |= sigmask(signo);
       return (0);
}

sigdelset(set, signo)
       sigset_t *set;
       int signo;
{
       *set &= ~sigmask(signo);
       return (0);
}

sigismember(set, signo)
       const sigset_t *set;
       int signo;
{
       return ((*set & ~sigmask(signo)) != 0);
}