Function _mi_malloc_generic

3rd/mimalloc-2.0.9/src/page.c:881–889

Generic allocation routine if the fast path (`alloc.c:mi_page_malloc`) does not succeed. Note: in debug mode the size includes MI_PADDING_SIZE and might have overflowed. The `huge_alignment` is normally 0 but is set to a multiple of MI_SEGMENT_SIZE for very large requested alignments in which case we use a huge segment.

// The `huge_alignment` is normally 0 but is set to a multiple of MI_SEGMENT_SIZE for
// very large requested alignments in which case we use a huge segment.
void* _mi_malloc_generic(mi_heap_t* heap, size_t size, bool zero, size_t huge_alignment) mi_attr_noexcept
{
  mi_assert_internal(heap != NULL);

  // initialize if necessary
  if mi_unlikely(!mi_heap_is_initialized(heap)) {
    mi_thread_init(); // calls `_mi_heap_init` in turn
    heap = mi_get_default_heap();
    if mi_unlikely(!mi_heap_is_initialized(heap)) { return NULL; }
  }
  mi_assert_internal(mi_heap_is_initialized(heap));