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/**
* @file
*
* @brief Get Pointer to Next Object that is Active
* @ingroup ScoreObject
*/
/*
* 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/objectimpl.h>
Objects_Control *
_Objects_Get_next(
Objects_Information *information,
Objects_Id id,
Objects_Locations *location_p,
Objects_Id *next_id_p
)
{
Objects_Control *object;
Objects_Id next_id;
if ( !information )
return NULL;
if ( !location_p )
return NULL;
if ( !next_id_p )
return NULL;
if (_Objects_Get_index(id) == OBJECTS_ID_INITIAL_INDEX)
next_id = information->minimum_id;
else
next_id = id;
_Objects_Allocator_lock();
do {
/* walked off end of list? */
if (_Objects_Get_index(next_id) > information->maximum)
{
_Objects_Allocator_unlock();
*location_p = OBJECTS_ERROR;
*next_id_p = OBJECTS_ID_FINAL;
return NULL;
}
/* try to grab one */
object = _Objects_Get_no_protection(information, next_id, location_p);
next_id++;
} while (*location_p != OBJECTS_LOCAL);
*next_id_p = next_id;
return object;
}
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