2 * Copyright (c) 1989, 1993
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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 $
31 * $DragonFly: src/lib/libc/gen/sleep.c,v 1.4 2005/11/13 00:07:42 swildner Exp $
34 #include "namespace.h"
39 #include "un-namespace.h"
42 __sleep(unsigned int seconds)
44 struct timespec time_to_sleep;
45 struct timespec time_remaining;
48 * Avoid overflow when `seconds' is huge. This assumes that
49 * the maximum value for a time_t is >= INT_MAX.
51 if (seconds > INT_MAX)
52 return (seconds - INT_MAX + __sleep(INT_MAX));
54 time_to_sleep.tv_sec = seconds;
55 time_to_sleep.tv_nsec = 0;
56 if (_nanosleep(&time_to_sleep, &time_remaining) != -1)
59 return (seconds); /* best guess */
60 return (time_remaining.tv_sec +
61 (time_remaining.tv_nsec != 0)); /* round up */
64 __weak_reference(__sleep, sleep);
65 __weak_reference(__sleep, _sleep);