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/**
* @file
*
* @brief RTEMS Extend Region
* @ingroup ClassicRegion
*/
/*
* COPYRIGHT (c) 1989-2009.
* 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.rtems.com/license/LICENSE.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/system.h>
#include <rtems/rtems/status.h>
#include <rtems/rtems/support.h>
#include <rtems/rtems/options.h>
#include <rtems/rtems/regionimpl.h>
#include <rtems/score/thread.h>
#include <rtems/score/apimutex.h>
rtems_status_code rtems_region_extend(
rtems_id id,
void *starting_address,
uintptr_t length
)
{
uintptr_t amount_extended;
Objects_Locations location;
rtems_status_code return_status;
Region_Control *the_region;
if ( !starting_address )
return RTEMS_INVALID_ADDRESS;
_RTEMS_Lock_allocator(); /* to prevent deletion */
the_region = _Region_Get( id, &location );
switch ( location ) {
case OBJECTS_LOCAL:
amount_extended = _Heap_Extend(
&the_region->Memory,
starting_address,
length,
0
);
if ( amount_extended > 0 ) {
the_region->length += amount_extended;
the_region->maximum_segment_size += amount_extended;
return_status = RTEMS_SUCCESSFUL;
} else {
return_status = RTEMS_INVALID_ADDRESS;
}
break;
#if defined(RTEMS_MULTIPROCESSING)
case OBJECTS_REMOTE: /* this error cannot be returned */
break;
#endif
case OBJECTS_ERROR:
default:
return_status = RTEMS_INVALID_ID;
break;
}
_RTEMS_Unlock_allocator();
return return_status;
}
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