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/**
* @file
*
* @brief Watchdog Insert
* @ingroup ScoreWatchdog
*/
/*
* 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.rtems.org/license/LICENSE.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/score/watchdogimpl.h>
#include <rtems/score/isrlevel.h>
#include <rtems/score/percpu.h>
void _Watchdog_Insert(
Watchdog_Header *header,
Watchdog_Control *the_watchdog
)
{
ISR_lock_Context lock_context;
Watchdog_Control *after;
uint32_t insert_isr_nest_level;
Watchdog_Interval delta_interval;
insert_isr_nest_level = _ISR_Nest_level;
_Watchdog_Acquire( header, &lock_context );
/*
* Check to see if the watchdog has just been inserted by a
* higher priority interrupt. If so, abandon this insert.
*/
if ( the_watchdog->state != WATCHDOG_INACTIVE ) {
_Watchdog_Release( header, &lock_context );
return;
}
the_watchdog->state = WATCHDOG_BEING_INSERTED;
_Watchdog_Sync_count++;
restart:
delta_interval = the_watchdog->initial;
for ( after = _Watchdog_First( header ) ;
;
after = _Watchdog_Next( after ) ) {
if ( delta_interval == 0 || !_Watchdog_Next( after ) )
break;
if ( delta_interval < after->delta_interval ) {
after->delta_interval -= delta_interval;
break;
}
delta_interval -= after->delta_interval;
_Watchdog_Flash( header, &lock_context );
if ( the_watchdog->state != WATCHDOG_BEING_INSERTED ) {
goto exit_insert;
}
if ( _Watchdog_Sync_level > insert_isr_nest_level ) {
_Watchdog_Sync_level = insert_isr_nest_level;
goto restart;
}
}
_Watchdog_Activate( the_watchdog );
the_watchdog->delta_interval = delta_interval;
_Chain_Insert_unprotected( after->Node.previous, &the_watchdog->Node );
the_watchdog->start_time = _Watchdog_Ticks_since_boot;
exit_insert:
_Watchdog_Sync_level = insert_isr_nest_level;
_Watchdog_Sync_count--;
_Watchdog_Release( header, &lock_context );
}
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