2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
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11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. 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.
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
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23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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29 * @(#)sleep.c 8.1 (Berkeley) 6/4/93
30 * $FreeBSD: src/lib/libc/gen/sleep.c,v 1.28.2.1 2000/03/18 23:13:24 jasone Exp $
33 #include "namespace.h"
38 #include "un-namespace.h"
41 __sleep(unsigned int seconds
)
43 struct timespec time_to_sleep
;
44 struct timespec time_remaining
;
47 * Avoid overflow when `seconds' is huge. This assumes that
48 * the maximum value for a time_t is >= INT_MAX.
50 if (seconds
> INT_MAX
)
51 return (seconds
- INT_MAX
+ __sleep(INT_MAX
));
53 time_to_sleep
.tv_sec
= seconds
;
54 time_to_sleep
.tv_nsec
= 0;
55 if (_nanosleep(&time_to_sleep
, &time_remaining
) != -1)
58 return (seconds
); /* best guess */
59 return (time_remaining
.tv_sec
+
60 (time_remaining
.tv_nsec
!= 0)); /* round up */
63 __weak_reference(__sleep
, sleep
);
64 __weak_reference(__sleep
, _sleep
);