portable/Softune/MB96340/__STD_LIB_sbrk.c

/* THIS SAMPLE CODE IS PROVIDED AS IS AND IS SUBJECT TO ALTERATIONS. FUJITSU */
/* MICROELECTRONICS ACCEPTS NO RESPONSIBILITY OR LIABILITY FOR ANY ERRORS OR */
/* ELIGIBILITY FOR ANY PURPOSES.                                             */
/*                 (C) Fujitsu Microelectronics Europe GmbH                  */

/*---------------------------------------------------------------------------
 * __STD_LIB_sbrk.C
 * - Used by heap_3.c for memory accocation and deletion.
 *
 * /*---------------------------------------------------------------------------*/

#include "FreeRTOSConfig.h"
#include <stdlib.h>

static long brk_siz = 0;
typedef int _heep_t;
#define ROUNDUP( s )    ( ( ( s ) + sizeof( _heep_t ) - 1 ) & ~( sizeof( _heep_t ) - 1 ) )
static _heep_t _heep[ ROUNDUP( configTOTAL_HEAP_SIZE ) / sizeof( _heep_t ) ];
#define              _heep_size    ROUNDUP( configTOTAL_HEAP_SIZE )

extern char * sbrk( int size )
{
    if( ( brk_siz + size > _heep_size ) || ( brk_siz + size < 0 ) )
    {
        return( ( char * ) -1 );
    }

    brk_siz += size;
    return( ( char * ) _heep + brk_siz - size );
}