blob: 6de641ae0cc65806a900c98b0e00ed52a15cc1a7 (
plain) (
tree)
|
|
/*
* 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.
*
* $Id$
*/
#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_Allocate_by_index
*
* DESCRIPTION:
*
* This function allocates the object control block
* specified by the index from the inactive chain of
* free object control blocks.
*/
Objects_Control *_Objects_Allocate_by_index(
Objects_Information *information,
unsigned32 index,
unsigned32 sizeof_control
)
{
Objects_Control *the_object;
if ( index && information->maximum >= index ) {
the_object = information->local_table[ index ];
if ( the_object )
return NULL;
/* XXX
* This whole section of code needs to be addressed.
* + The 0 should be dealt with more properly so we can autoextend.
* + The pointer arithmetic is probably too expensive.
* + etc.
*/
the_object = (Objects_Control *) _Addresses_Add_offset(
information->object_blocks[ 0 ],
(sizeof_control * (index - 1))
);
_Chain_Extract( &the_object->Node );
return the_object;
}
/*
* Autoextend will have to be thought out as it applies
* to user assigned indices.
*/
return NULL;
}
|