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/**
* @file watchdogadjusttochain.c
*
* This is used by the Timer Server task.
*/
/* COPYRIGHT (c) 1989-2008.
* 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
#include <rtems/system.h>
#include <rtems/score/isr.h>
#include <rtems/score/watchdog.h>
void _Watchdog_Adjust_to_chain(
Chain_Control *header,
Watchdog_Interval units_arg,
Chain_Control *to_fire
)
{
Watchdog_Interval units = units_arg;
ISR_Level level;
Chain_Node *node;
if ( !units ) {
return;
}
_ISR_Disable( level );
if ( !_Chain_Is_empty( header ) ) {
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 = 0;
do {
node = _Chain_Get_unprotected( header );
_Chain_Append_unprotected( to_fire, node );
_ISR_Flash( level );
} while ( !_Chain_Is_empty( header ) &&
_Watchdog_First( header )->delta_interval == 0 );
if ( _Chain_Is_empty( header ) )
break;
}
}
}
_ISR_Enable( level );
}
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