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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.

 *

 *  objectget.c,v 1.5 2001/11/07 22:41:51 joel 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

 *

 * 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

 *   id          - object id to search 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(

  Objects_Information *information,

  Objects_Id           id,

  Objects_Locations   *location

)

{

  Objects_Control *the_object;

  unsigned32       index;

#if defined(RTEMS_MULTIPROCESSING)

  index = id - information->minimum_id + 1;

#else

  /* index = _Objects_Get_index( id ); */

  index = id & 0x0000ffff;

  /* This should work but doesn't always :( */

  /* index = (unsigned16) id; */

#endif

   if ( information->maximum >= index ) {

    _Thread_Disable_dispatch();

    if ( (the_object = information->local_table[ index ]) != NULL ) {

      *location = OBJECTS_LOCAL;

      return the_object;

    }

    _Thread_Enable_dispatch();

    *location = OBJECTS_ERROR;

    return NULL;

  }

  *location = OBJECTS_ERROR;

#if defined(RTEMS_MULTIPROCESSING)

  _Objects_MP_Is_remote( information, id, location, &the_object );

  return the_object;

#else

  return NULL;

#endif

}