Function _mi_usable_size

3rd/mimalloc-2.0.9/src/alloc.c:603–610

}

static inline size_t _mi_usable_size(const void* p, const char* msg) mi_attr_noexcept {
  if (p == NULL) return 0;
  const mi_segment_t* const segment = mi_checked_ptr_segment(p, msg);
  const mi_page_t* const page = _mi_segment_page_of(segment, p);
  if mi_likely(!mi_page_has_aligned(page)) {
    const mi_block_t* block = (const mi_block_t*)p;
    return mi_page_usable_size_of(page, block);
  }
  else {
    // split out to separate routine for improved code generation
    return mi_page_usable_aligned_size_of(segment, page, p);