Function _mi_page_malloc

3rd/mimalloc-2.0.9/src/alloc.c:29–34

Fast allocation in a page: just pop from the free list. Fall back to generic allocation only if the list is empty.

// Fast allocation in a page: just pop from the free list.
// Fall back to generic allocation only if the list is empty.
extern inline void* _mi_page_malloc(mi_heap_t* heap, mi_page_t* page, size_t size, bool zero) mi_attr_noexcept {
  mi_assert_internal(page->xblock_size==0||mi_page_block_size(page) >= size);
  mi_block_t* const block = page->free;
  if mi_unlikely(block == NULL) {
    return _mi_malloc_generic(heap, size, zero, 0);
  }
  mi_assert_internal(block != NULL && _mi_ptr_page(block) == page);
  // pop from the free list
  page->used++;