b02706324a
This dates to before the beginning of our repo and was found clang 10. MFC after: 3 days Sponsored by: DARPA
61 lines
2.3 KiB
C
61 lines
2.3 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*
|
|
* Copyright (c) 1985, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__SCCSID("@(#)ualarm.c 8.1 (Berkeley) 6/4/93");
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/time.h>
|
|
#include <unistd.h>
|
|
|
|
#define USPS 1000000 /* # of microseconds in a second */
|
|
|
|
/*
|
|
* Generate a SIGALRM signal in ``usecs'' microseconds.
|
|
* If ``reload'' is non-zero, keep generating SIGALRM
|
|
* every ``reload'' microseconds after the first signal.
|
|
*/
|
|
useconds_t
|
|
ualarm(useconds_t usecs, useconds_t reload)
|
|
{
|
|
struct itimerval new, old;
|
|
|
|
new.it_interval.tv_usec = reload % USPS;
|
|
new.it_interval.tv_sec = reload / USPS;
|
|
|
|
new.it_value.tv_usec = usecs % USPS;
|
|
new.it_value.tv_sec = usecs / USPS;
|
|
|
|
if (setitimer(ITIMER_REAL, &new, &old) == 0)
|
|
return (old.it_value.tv_sec * USPS + old.it_value.tv_usec);
|
|
return (-1);
|
|
}
|