first working version of new segment allocation

1 files changed, 6 insertions, 1 deletions

diff --git a/include/mimalloc-internal.h b/include/mimalloc-internal.h
index bb60458..e8fa1ba 100644
--- a/include/mimalloc-internal.h
+++ b/include/mimalloc-internal.h
@@ -254,7 +254,12 @@ static inline mi_slice_t* mi_page_to_slice(mi_page_t* p) {
   return (mi_slice_t*)(p);
 }
 
-
+static size_t mi_slice_index(const mi_slice_t* slice) {
+  mi_segment_t* segment = _mi_ptr_segment(slice);
+  ptrdiff_t index = slice - segment->slices;
+  mi_assert_internal(index >= 0 && index < (ptrdiff_t)segment->slice_count);
+  return index;
+}
 
 // Segment belonging to a page
 static inline mi_segment_t* _mi_page_segment(const mi_page_t* page) {