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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: objectallocate.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_Allocate

 *

 *  DESCRIPTION:

 *

 *  This function allocates a object control block from

 *  the inactive chain of free object control blocks.

 */

Objects_Control *_Objects_Allocate(

  Objects_Information *information

)

{

  Objects_Control *the_object =

    (Objects_Control *) _Chain_Get( &information->Inactive );

  if ( information->auto_extend ) {

    /*

     *  If the list is empty then we are out of objects and need to

     *  extend information base.

     */

    if ( !the_object ) {

      _Objects_Extend_information( information );

      the_object =  (Objects_Control *) _Chain_Get( &information->Inactive );

    }

    if ( the_object ) {

      unsigned32 block;

      block = _Objects_Get_index( the_object->id ) -

              _Objects_Get_index( information->minimum_id );

      block /= information->allocation_size;

      information->inactive_per_block[ block ]--;

      information->inactive--;

    }

  }

  return the_object;

}