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/*
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6812
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* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
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/* All Rights Reserved */
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/*
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* Copyright (c) 1985 Regents of the University of California.
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* All rights reserved. The Berkeley software License Agreement
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* specifies the terms and conditions for redistribution.
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*/
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6812
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#pragma ident "%Z%%M% %I% %E% SMI"
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#include "lint.h"
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#include <sys/types.h>
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#include <sys/time.h>
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#include <unistd.h>
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#define USPS 1000000 /* # of microseconds in a second */
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/*
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* Generate a SIGALRM signal in ``usecs'' microseconds.
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* If ``reload'' is non-zero, keep generating SIGALRM
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* every ``reload'' microseconds after the first signal.
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*/
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useconds_t
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ualarm(useconds_t usecs, useconds_t reload)
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{
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struct itimerval new, old;
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new.it_interval.tv_usec = reload % USPS;
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new.it_interval.tv_sec = reload / USPS;
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new.it_value.tv_usec = usecs % USPS;
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new.it_value.tv_sec = usecs / USPS;
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if (setitimer(ITIMER_REAL, &new, &old) != 0)
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return (0); /* no errors are defined */
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return (old.it_value.tv_sec * USPS + old.it_value.tv_usec);
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}
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