mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-26 11:47:31 +00:00
74 lines
2.7 KiB
C
74 lines
2.7 KiB
C
/*
|
|
* Copyright (c) 1989, 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. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. 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.
|
|
*/
|
|
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
#if 0
|
|
static char sccsid[] = "@(#)sleep.c 8.1 (Berkeley) 6/4/93";
|
|
#endif
|
|
static char rcsid[] =
|
|
"$FreeBSD$";
|
|
#endif /* LIBC_SCCS and not lint */
|
|
|
|
#include <errno.h>
|
|
#include <limits.h>
|
|
#include <time.h>
|
|
#include <unistd.h>
|
|
|
|
unsigned int
|
|
__sleep(seconds)
|
|
unsigned int seconds;
|
|
{
|
|
struct timespec time_to_sleep;
|
|
struct timespec time_remaining;
|
|
|
|
/*
|
|
* Avoid overflow when `seconds' is huge. This assumes that
|
|
* the maximum value for a time_t is >= INT_MAX.
|
|
*/
|
|
if (seconds > INT_MAX)
|
|
return (seconds - INT_MAX + __sleep(INT_MAX));
|
|
|
|
time_to_sleep.tv_sec = seconds;
|
|
time_to_sleep.tv_nsec = 0;
|
|
if (_nanosleep(&time_to_sleep, &time_remaining) != -1)
|
|
return (0);
|
|
if (errno != EINTR)
|
|
return (seconds); /* best guess */
|
|
return (time_remaining.tv_sec +
|
|
(time_remaining.tv_nsec != 0)); /* round up */
|
|
}
|
|
|
|
#ifndef _THREAD_SAFE
|
|
__weak_reference(__sleep, sleep);
|
|
#endif
|