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/*
* Region 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.rtems.com/license/LICENSE.
*
* $Id$
*/
#include <rtems/system.h>
#include <rtems/rtems/status.h>
#include <rtems/rtems/support.h>
#include <rtems/score/object.h>
#include <rtems/rtems/options.h>
#include <rtems/rtems/region.h>
#include <rtems/score/states.h>
#include <rtems/score/thread.h>
#include <rtems/score/apimutex.h>
/*PAGE
*
* rtems_region_get_segment_size
*
* This directive will return the size of the segment indicated
*
* Input parameters:
* id - region id
* segment - segment address
* size - pointer to segment size in bytes
*
* Output parameters:
* size - segment size in bytes filled in
* RTEMS_SUCCESSFUL - if successful
* error code - if unsuccessful
*/
rtems_status_code rtems_region_get_segment_size(
Objects_Id id,
void *segment,
size_t *size
)
{
register Region_Control *the_region;
Objects_Locations location;
Thread_Control *executing;
_RTEMS_Lock_allocator();
executing = _Thread_Executing;
the_region = _Region_Get( id, &location );
switch ( location ) {
case OBJECTS_REMOTE: /* this error cannot be returned */
_RTEMS_Unlock_allocator();
return RTEMS_INTERNAL_ERROR;
case OBJECTS_ERROR:
_RTEMS_Unlock_allocator();
return RTEMS_INVALID_ID;
case OBJECTS_LOCAL:
if ( _Heap_Size_of_user_area( &the_region->Memory, segment, size ) ) {
_RTEMS_Unlock_allocator();
return RTEMS_SUCCESSFUL;
}
_RTEMS_Unlock_allocator();
return RTEMS_INVALID_ADDRESS;
}
return RTEMS_INTERNAL_ERROR; /* unreached - only to remove warnings */
}
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