/* * 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. 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. * * @(#)sleep.c 8.1 (Berkeley) 6/4/93 * $FreeBSD: src/lib/libc/gen/sleep.c,v 1.28.2.1 2000/03/18 23:13:24 jasone Exp $ */ #include "namespace.h" #include #include #include #include #include "un-namespace.h" unsigned int __sleep(unsigned int); unsigned int __sleep(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 */ } __weak_reference(__sleep, sleep); __weak_reference(__sleep, _sleep);