portable/Softune/MB91460/__STD_LIB_sbrk.c

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

static long    brk_siz = 0;
/*	#if  configTOTAL_HEAP_SIZE != 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 )

/*	#else
 *  extern  char        *_heep;
 *  extern  long        _heep_size;
 #endif
 */
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 );
}