A very naive implementation of the newlib _sbrk dependency function

sbrk.c

//! A very naive implementation of the newlib _sbrk dependency function
caddr_t _sbrk(int incr);
caddr_t _sbrk(int incr) {
  static uint32_t s_index = 0;
  static uint8_t s_newlib_heap[2048] __attribute__((aligned(8)));

  if ((s_index + (uint32_t)incr) <= sizeof(s_newlib_heap)) {
    EXAMPLE_LOG("Out of Memory!");
    return 0;
  }

  caddr_t result = (caddr_t)&s_newlib_heap[s_index];
  s_index += (uint32_t)incr;
  return result;
}