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/*

 *  Partition Manager

 *

 *

 *  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: partreturnbuffer.c,v 1.2 2001-09-27 11:59:19 chris Exp $

 */

#include <rtems/system.h>

#include <rtems/rtems/status.h>

#include <rtems/rtems/support.h>

#include <rtems/score/address.h>

#include <rtems/score/object.h>

#include <rtems/rtems/part.h>

#include <rtems/score/thread.h>

#include <rtems/score/sysstate.h>

/*PAGE

 *

 *  rtems_partition_return_buffer

 *

 *  This directive will return the given buffer to the specified

 *  buffer partition.

 *

 *  Input parameters:

 *    id     - partition id

 *    buffer - pointer to buffer address

 *

 *  Output parameters:

 *    RTEMS_SUCCESSFUL - if successful

 *    error code - if unsuccessful

 */

rtems_status_code rtems_partition_return_buffer(

  Objects_Id  id,

  void       *buffer

)

{

  register Partition_Control *the_partition;

  Objects_Locations           location;

  the_partition = _Partition_Get( id, &location );

  switch ( location ) {

    case OBJECTS_REMOTE:

#if defined(RTEMS_MULTIPROCESSING)

      return _Partition_MP_Send_request_packet(

          PARTITION_MP_RETURN_BUFFER_REQUEST,

          id,

          buffer

        );

#endif

    case OBJECTS_ERROR:

      return RTEMS_INVALID_ID;

    case OBJECTS_LOCAL:

      if ( _Partition_Is_buffer_valid( buffer, the_partition ) ) {

        _Partition_Free_buffer( the_partition, buffer );

        the_partition->number_of_used_blocks -= 1;

        _Thread_Enable_dispatch();

        return RTEMS_SUCCESSFUL;

      }

      _Thread_Enable_dispatch();

      return RTEMS_INVALID_ADDRESS;

  }

  return RTEMS_INTERNAL_ERROR;   /* unreached - only to remove warnings */

}