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/**
* @file
*
* @ingroup RTEMSImplClassicRegion
*
* @brief This source file contains the implementation of
* rtems_region_resize_segment().
*/
/*
* COPYRIGHT (c) 1989-2014.
* 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.org/license/LICENSE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/rtems/regionimpl.h>
rtems_status_code rtems_region_resize_segment(
rtems_id id,
void *segment,
uintptr_t size,
uintptr_t *old_size
)
{
uintptr_t avail_size;
uintptr_t osize;
rtems_status_code status;
Heap_Resize_status resize_status;
Region_Control *the_region;
if ( old_size == NULL ) {
return RTEMS_INVALID_ADDRESS;
}
the_region = _Region_Get_and_lock( id );
if ( the_region == NULL ) {
return RTEMS_INVALID_ID;
}
resize_status = _Heap_Resize_block(
&the_region->Memory,
segment,
(uint32_t) size,
&osize,
&avail_size
);
*old_size = (uint32_t) osize;
switch ( resize_status ) {
case HEAP_RESIZE_SUCCESSFUL:
/* Unlocks allocator */
_Region_Process_queue( the_region );
return RTEMS_SUCCESSFUL;
case HEAP_RESIZE_UNSATISFIED:
status = RTEMS_UNSATISFIED;
break;
default:
status = RTEMS_INVALID_ADDRESS;
break;
}
_Region_Unlock( the_region );
return status;
}
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