projects / apple / libc.git / blame
| Commit | Line | Data |
|---|---|---|
| e9ce8d39 | 1 | /* |
| 5b2abdfb | 2 | * Copyright (c) 1989, 1993 |
| e9ce8d39 A |
3 | * The Regents of the University of California. All rights reserved. |
| 4 | * | |
| 5 | * Redistribution and use in source and binary forms, with or without | |
| 6 | * modification, are permitted provided that the following conditions | |
| 7 | * are met: | |
| 8 | * 1. Redistributions of source code must retain the above copyright | |
| 9 | * notice, this list of conditions and the following disclaimer. | |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 11 | * notice, this list of conditions and the following disclaimer in the | |
| 12 | * documentation and/or other materials provided with the distribution. | |
| e9ce8d39 A |
13 | * 4. Neither the name of the University nor the names of its contributors |
| 14 | * may be used to endorse or promote products derived from this software | |
| 15 | * without specific prior written permission. | |
| 16 | * | |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 27 | * SUCH DAMAGE. | |
| 28 | */ | |
| 29 | ||
| 5b2abdfb | 30 | #if defined(LIBC_SCCS) && !defined(lint) |
| 9385eb3d | 31 | static char sccsid[] = "@(#)sleep.c 8.1 (Berkeley) 6/4/93"; |
| 5b2abdfb | 32 | #endif /* LIBC_SCCS and not lint */ |
| 9385eb3d | 33 | #include <sys/cdefs.h> |
| 1f2f436a | 34 | __FBSDID("$FreeBSD: src/lib/libc/gen/sleep.c,v 1.33 2009/12/05 19:31:38 ed Exp $"); |
| e9ce8d39 | 35 | |
| 9385eb3d A |
36 | #include "namespace.h" |
| 37 | #include <errno.h> | |
| 38 | #include <limits.h> | |
| 5b2abdfb | 39 | #include <time.h> |
| e9ce8d39 | 40 | #include <unistd.h> |
| 9385eb3d | 41 | #include "un-namespace.h" |
| e9ce8d39 | 42 | |
| 9385eb3d | 43 | unsigned int |
| 1f2f436a | 44 | __sleep(unsigned int seconds) |
| e9ce8d39 | 45 | { |
| 5b2abdfb | 46 | struct timespec time_to_sleep; |
| 9385eb3d | 47 | struct timespec time_remaining; |
| 5b2abdfb | 48 | |
| 9385eb3d A |
49 | /* |
| 50 | * Avoid overflow when `seconds' is huge. This assumes that | |
| 51 | * the maximum value for a time_t is >= INT_MAX. | |
| 52 | */ | |
| 53 | if (seconds > INT_MAX) | |
| 54 | return (seconds - INT_MAX + __sleep(INT_MAX)); | |
| 55 | ||
| 56 | time_to_sleep.tv_sec = seconds; | |
| 57 | time_to_sleep.tv_nsec = 0; | |
| 58 | if (_nanosleep(&time_to_sleep, &time_remaining) != -1) | |
| 59 | return (0); | |
| 60 | if (errno != EINTR) | |
| 61 | return (seconds); /* best guess */ | |
| 62 | return (time_remaining.tv_sec + | |
| 63 | (time_remaining.tv_nsec != 0)); /* round up */ | |
| e9ce8d39 | 64 | } |
| 9385eb3d A |
65 | |
| 66 | __weak_reference(__sleep, sleep); | |
| 67 | __weak_reference(__sleep, _sleep); |