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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [exec/] [rtems/] [src/] [partreturnbuffer.c] - Blame information for rev 593

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1 30 unneback
/*
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 *  Partition Manager
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 *
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 *
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 *  COPYRIGHT (c) 1989-1999.
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 *  On-Line Applications Research Corporation (OAR).
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 *
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 *  The license and distribution terms for this file may be
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 *  found in the file LICENSE in this distribution or at
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 *  http://www.OARcorp.com/rtems/license.html.
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 *
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 *  $Id: partreturnbuffer.c,v 1.2 2001-09-27 11:59:19 chris Exp $
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 */
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#include <rtems/system.h>
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#include <rtems/rtems/status.h>
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#include <rtems/rtems/support.h>
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#include <rtems/score/address.h>
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#include <rtems/score/object.h>
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#include <rtems/rtems/part.h>
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#include <rtems/score/thread.h>
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#include <rtems/score/sysstate.h>
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/*PAGE
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 *
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 *  rtems_partition_return_buffer
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 *
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 *  This directive will return the given buffer to the specified
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 *  buffer partition.
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 *
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 *  Input parameters:
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 *    id     - partition id
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 *    buffer - pointer to buffer address
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 *
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 *  Output parameters:
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 *    RTEMS_SUCCESSFUL - if successful
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 *    error code - if unsuccessful
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 */
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rtems_status_code rtems_partition_return_buffer(
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  Objects_Id  id,
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  void       *buffer
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)
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{
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  register Partition_Control *the_partition;
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  Objects_Locations           location;
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  the_partition = _Partition_Get( id, &location );
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  switch ( location ) {
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    case OBJECTS_REMOTE:
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#if defined(RTEMS_MULTIPROCESSING)
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      return _Partition_MP_Send_request_packet(
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          PARTITION_MP_RETURN_BUFFER_REQUEST,
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          id,
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          buffer
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        );
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#endif
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    case OBJECTS_ERROR:
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      return RTEMS_INVALID_ID;
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    case OBJECTS_LOCAL:
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      if ( _Partition_Is_buffer_valid( buffer, the_partition ) ) {
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        _Partition_Free_buffer( the_partition, buffer );
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        the_partition->number_of_used_blocks -= 1;
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        _Thread_Enable_dispatch();
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        return RTEMS_SUCCESSFUL;
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      }
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      _Thread_Enable_dispatch();
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      return RTEMS_INVALID_ADDRESS;
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  }
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  return RTEMS_INTERNAL_ERROR;   /* unreached - only to remove warnings */
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}

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