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/*

 *  Object 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: objectgetbyindex.c,v 1.2 2001-09-27 11:59:34 chris Exp $

 */

#include <rtems/system.h>

#include <rtems/score/address.h>

#include <rtems/score/chain.h>

#include <rtems/score/object.h>

#if defined(RTEMS_MULTIPROCESSING)

#include <rtems/score/objectmp.h>

#endif

#include <rtems/score/thread.h>

#include <rtems/score/wkspace.h>

#include <rtems/score/sysstate.h>

#include <rtems/score/isr.h>

/*PAGE

 *

 * _Objects_Get_by_index

 *

 * This routine sets the object pointer for the given

 * object id based on the given object information structure.

 *

 * Input parameters:

 *   information - pointer to entry in table for this class

 *   index       - object index to check for

 *   location    - address of where to store the location

 *

 * Output parameters:

 *   returns  - address of object if local

 *   location - one of the following:

 *                  OBJECTS_ERROR  - invalid object ID

 *                  OBJECTS_REMOTE - remote object

 *                  OBJECTS_LOCAL  - local object

 */

Objects_Control *_Objects_Get_by_index(

  Objects_Information *information,

  unsigned32           index,

  Objects_Locations   *location

)

{

  Objects_Control *the_object;

  if ( information->maximum >= index ) {

    _Thread_Disable_dispatch();

    if ( (the_object = _Objects_Get_local_object( information, index )) != NULL ) {

      *location = OBJECTS_LOCAL;

      return( the_object );

    }

    _Thread_Enable_dispatch();

    *location = OBJECTS_ERROR;

    return( NULL );

  }

  /*

   *  With just an index, you can't access a remote object.

   */

  _Thread_Enable_dispatch();

  *location = OBJECTS_ERROR;

  return NULL;

}