blob: 6926743f3292fd1a24474d497cca28f55480ac7a (
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
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
/*
* Watchdog Handler
*
*
* COPYRIGHT (c) 1989-1999.
* 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.OARcorp.com/rtems/license.html.
*
* $Id$
*/
#include <rtems/system.h>
#include <rtems/score/isr.h>
#include <rtems/score/watchdog.h>
/*PAGE
*
* _Watchdog_Adjust
*
* This routine adjusts the delta chain backward or forward in response
* to a time change.
*
* Input parameters:
* header - pointer to the delta chain to be adjusted
* direction - forward or backward adjustment to delta chain
* units - units to adjust
*
* Output parameters:
*/
void _Watchdog_Adjust(
Chain_Control *header,
Watchdog_Adjust_directions direction,
Watchdog_Interval units
)
{
if ( !_Chain_Is_empty( header ) ) {
switch ( direction ) {
case WATCHDOG_BACKWARD:
_Watchdog_First( header )->delta_interval += units;
break;
case WATCHDOG_FORWARD:
while ( units ) {
if ( units < _Watchdog_First( header )->delta_interval ) {
_Watchdog_First( header )->delta_interval -= units;
break;
} else {
units -= _Watchdog_First( header )->delta_interval;
_Watchdog_First( header )->delta_interval = 1;
_Watchdog_Tickle( header );
if ( _Chain_Is_empty( header ) )
break;
}
}
break;
}
}
}
|