blob: e864f3566a8befe224b2a416bcd0729bf6950d41 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
/*
* 3.4.3 Delay Process Execution, P1003.1b-1993, p. 81
*
* COPYRIGHT (c) 1989-2007.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
* $Id$
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#ifndef HAVE_USLEEP
#include <time.h>
#include <unistd.h>
#include <rtems/system.h>
#include <rtems/score/tod.h>
int usleep(
useconds_t useconds
)
{
struct timespec tp;
struct timespec tm;
unsigned remaining;
tp.tv_sec = useconds / TOD_MICROSECONDS_PER_SECOND;
tp.tv_nsec = (useconds % TOD_MICROSECONDS_PER_SECOND) * 1000;
nanosleep( &tp, &tm );
remaining = tm.tv_sec * TOD_MICROSECONDS_PER_SECOND;
remaining += tm.tv_nsec / 1000;
return remaining; /* seconds remaining */
}
#endif
|