Subversion Repositories openrisc_2011-10-31

/*

 *  Dual Port Memory 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: dpmemdelete.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/rtems/dpmem.h>

#include <rtems/score/object.h>

#include <rtems/score/thread.h>

#include <rtems/rtems/dpmem.h>

/*PAGE

 *

 *  rtems_port_delete

 *

 *  This directive allows a thread to delete a dual-ported memory area

 *  specified by the dual-ported memory identifier.

 *

 *  Input parameters:

 *    id - dual-ported memory area id

 *

 *  Output parameters:

 *    RTEMS_SUCCESSFUL - if successful

 *    error code        - if unsuccessful

 */

rtems_status_code rtems_port_delete(

  Objects_Id id

)

{

  register Dual_ported_memory_Control *the_port;

  Objects_Locations                    location;

  the_port = _Dual_ported_memory_Get( id, &location );

  switch ( location ) {

    case OBJECTS_REMOTE:        /* this error cannot be returned */

      return RTEMS_INTERNAL_ERROR;

    case OBJECTS_ERROR:

      return RTEMS_INVALID_ID;

    case OBJECTS_LOCAL:

      _Objects_Close( &_Dual_ported_memory_Information, &the_port->Object );

      _Dual_ported_memory_Free( the_port );

      _Thread_Enable_dispatch();

      return RTEMS_SUCCESSFUL;

  }

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

}