Function mi_expand

system/lib/mimalloc/src/alloc.c:347–359

Expand (or shrink) in place (or fail)

// Expand (or shrink) in place (or fail)
void* mi_expand(void* p, size_t newsize) mi_attr_noexcept {
  #if MI_PADDING
  // we do not shrink/expand with padding enabled
  MI_UNUSED(p); MI_UNUSED(newsize);
  return NULL;
  #else
  if (p == NULL) return NULL;
  const mi_page_t* const page = mi_validate_ptr_page(p,"mi_expand");
  const size_t size = _mi_usable_size(p,page);
  if (newsize > size) return NULL;
  return p; // it fits
  #endif
}

void* _mi_theap_realloc_zero(mi_theap_t* theap, void* p, size_t newsize, bool zero, size_t* usable_pre, size_t* usable_post) mi_attr_noexcept {
  // if p == NULL then behave as malloc.