Subversion Repositories openrisc_2011-10-31

/*

 *  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: partgetbuffer.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_get_buffer

 *

 *  This directive will obtain a buffer from a buffer partition.

 *

 *  Input parameters:

 *    id     - partition id

 *    buffer - pointer to buffer address

 *

 *  Output parameters:

 *    buffer            - pointer to buffer address filled in

 *    RTEMS_SUCCESSFUL - if successful

 *    error code        - if unsuccessful

 */

rtems_status_code rtems_partition_get_buffer(

  Objects_Id   id,

  void       **buffer

)

{

  register Partition_Control *the_partition;

  Objects_Locations           location;

  void                       *the_buffer;

  the_partition = _Partition_Get( id, &location );

  switch ( location ) {

    case OBJECTS_REMOTE:

#if defined(RTEMS_MULTIPROCESSING)

      _Thread_Executing->Wait.return_argument = buffer;

      return(

        _Partition_MP_Send_request_packet(

          PARTITION_MP_GET_BUFFER_REQUEST,

          id,

        )

      );

#endif

    case OBJECTS_ERROR:

      return RTEMS_INVALID_ID;

    case OBJECTS_LOCAL:

      the_buffer = _Partition_Allocate_buffer( the_partition );

      if ( the_buffer ) {

        the_partition->number_of_used_blocks += 1;

        _Thread_Enable_dispatch();

        *buffer = the_buffer;

        return RTEMS_SUCCESSFUL;

      }

      _Thread_Enable_dispatch();

      return RTEMS_UNSATISFIED;

  }

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

}