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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: objectshrinkinformation.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_Shrink_information

 *

 *  This routine shrinks object information related data structures.

 *  The object's name and object space are released. The local_table

 *  etc block does not shrink. The InActive list needs to be scanned

 *  to find the objects are remove them.

 *  Input parameters:

 *    information     - object information table

 *    the_block       - the block to remove

 *

 *  Output parameters:  NONE

 */

void _Objects_Shrink_information(

  Objects_Information *information

)

{

  Objects_Control  *the_object;

  Objects_Control  *extract_me;

  unsigned32        block_count;

  unsigned32        block;

  unsigned32        index_base;

  unsigned32        index;

  /*

   * Search the list to find block or chunnk with all objects inactive.

   */

  index_base = _Objects_Get_index( information->minimum_id );

  block_count = ( information->maximum - index_base ) / information->allocation_size;

  for ( block = 0; block < block_count; block++ ) {

    if ( information->inactive_per_block[ block ] == information->allocation_size ) {

      /*

       * XXX - Not to sure how to use a chain where you need to iterate and

       *       and remove elements.

       */

      the_object = (Objects_Control *) information->Inactive.first;

      /*

       *  Assume the Inactive chain is never empty at this point

       */

      do {

        index = _Objects_Get_index( the_object->id );

        if ((index >= index_base) &&

            (index < (index_base + information->allocation_size))) {

          /*

           *  Get the next node before the node is extracted

           */

          extract_me = the_object;

          if ( !_Chain_Is_last( &the_object->Node ) )

            the_object = (Objects_Control *) the_object->Node.next;

          else

            the_object = NULL;

          _Chain_Extract( &extract_me->Node );

        }

        else {

          the_object = (Objects_Control *) the_object->Node.next;

        }

      }

      while ( the_object && !_Chain_Is_last( &the_object->Node ) );

      /*

       *  Free the memory and reset the structures in the object' information

       */

      _Workspace_Free( information->object_blocks[ block ] );

      information->name_table[ block ] = NULL;

      information->object_blocks[ block ] = NULL;

      information->inactive_per_block[ block ] = 0;

      information->inactive -= information->allocation_size;

      return;

    }

    index_base += information->allocation_size;

  }

}