| /* |
| * 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. |
| * 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) |
| static char sccsid[] = "@(#)sleep.c 8.1 (Berkeley) 6/4/93"; |
| #endif /* LIBC_SCCS and not lint */ |
| #include <sys/cdefs.h> |
| __FBSDID("$FreeBSD$"); |
| |
| #include "namespace.h" |
| #include <errno.h> |
| #include <limits.h> |
| #include <time.h> |
| #include <unistd.h> |
| #include "un-namespace.h" |
| |
| 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); |