* allocation regions. It should be 0 for all unallocated pages (not
* hard to achieve).
*/
-#if PAGE_BYTES > USHRT_MAX
+#if GENCGC_CARD_BYTES > USHRT_MAX
unsigned int bytes_used;
#else
unsigned short bytes_used;
* OSes). This is useful for re-scavenging pages that are
* written during a GC. */
write_protected_cleared :1,
- /* the region the page is allocated to: 0 for a free page; 1
- * for boxed objects; 2 for unboxed objects. If the page is
- * free the following slots are invalid (well the bytes_used
- * must be 0). */
+ /* 000 free
+ * 10? boxed data
+ * 11? boxed code
+ * 01? unboxed data
+ * ??1 open region
+ *
+ * If the page is free the following slots are invalid, except
+ * for the bytes_used which must be zero. */
allocated :3,
/* If this page should not be moved during a GC then this flag
* is set. It's only valid during a GC for allocated pages. */
* set. No other objects should be allocated to these pages.
* This is only valid when the page is allocated. */
large_object :1,
- /* True if the page is known to contain only zeroes. */
+ /* Cleared if the page is known to contain only zeroes. */
need_to_zero :1;
/* the generation that this page belongs to. This should be valid
{
if (obj >= DYNAMIC_SPACE_START) {
page_index_t page_index=((pointer_sized_uint_t)obj
- - DYNAMIC_SPACE_START) / PAGE_BYTES;
+ - DYNAMIC_SPACE_START) / GENCGC_CARD_BYTES;
return ((page_index < page_table_pages) &&
(page_table[page_index].gen == space));
} else {