FreeRTOS/Demo/CORTEX_A53_64-bit_UltraScale_MPSoC/RTOSDemo_A53_bsp/psu_cortexa53_0/libsrc/standalone_v6_6/src/sbrk.c

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#include <errno.h>
#include "xil_types.h"
#ifdef __cplusplus
extern "C" {
	__attribute__((weak)) char8 *sbrk (s32 nbytes);
}
#endif

extern u8 _heap_start[];
extern u8 _heap_end[];
extern char8 HeapBase[];
extern char8 HeapLimit[];



__attribute__((weak)) char8 *sbrk (s32 nbytes)
{
  char8 *base;
  static char8 *heap_ptr = HeapBase;

  base = heap_ptr;
	if((heap_ptr != NULL) && (heap_ptr + nbytes <= (char8 *)&HeapLimit + 1)) {
	heap_ptr += nbytes;
    return base;
  }	else {
    errno = ENOMEM;
    return ((char8 *)-1);
  }
}