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/**
* @file
*
* @brief RTEMS Return Region Segment
* @ingroup ClassicRegion
*/
/*
* 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.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef RTEMS_REGION_SHRED_ON_FREE
#include <string.h>
#ifndef RTEMS_REGION_FREE_SHRED_PATTERN
#define RTEMS_REGION_FREE_SHRED_PATTERN 0x00
#endif
#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_return_segment(
rtems_id id,
void *segment
)
{
Objects_Locations location;
rtems_status_code return_status;
#ifdef RTEMS_REGION_FREE_SHRED_PATTERN
uint32_t size;
#endif
int status;
Region_Control *the_region;
_RTEMS_Lock_allocator();
the_region = _Region_Get( id, &location );
switch ( location ) {
case OBJECTS_LOCAL:
#ifdef RTEMS_REGION_FREE_SHRED_PATTERN
if ( !_Heap_Size_of_alloc_area( &the_region->Memory, segment, &size ) )
return_status = RTEMS_INVALID_ADDRESS;
else {
memset( segment, (RTEMS_REGION_FREE_SHRED_PATTERN & 0xFF), size );
#endif
status = _Region_Free_segment( the_region, segment );
if ( !status )
return_status = RTEMS_INVALID_ADDRESS;
else {
the_region->number_of_used_blocks -= 1;
_Region_Process_queue(the_region); /* unlocks allocator */
return RTEMS_SUCCESSFUL;
}
#ifdef RTEMS_REGION_FREE_SHRED_PATTERN
}
#endif
break;
#if defined(RTEMS_MULTIPROCESSING)
case OBJECTS_REMOTE: /* this error cannot be returned */
#endif
case OBJECTS_ERROR:
default:
return_status = RTEMS_INVALID_ID;
break;
}
_RTEMS_Unlock_allocator();
return return_status;
}
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