1 /* card marking write barrier. a card is a byte storing a mark flag,
2 and the offset (in cells) of the first object in the card.
4 the mark flag is set by the write barrier when an object in the
5 card has a slot written to.
7 the offset of the first object is set by the allocator. */
12 /* if card_points_to_nursery is set, card_points_to_aging must also be set. */
13 static const cell card_points_to_nursery = 0x80;
14 static const cell card_points_to_aging = 0x40;
15 static const cell card_mark_mask = (card_points_to_nursery | card_points_to_aging);
18 static const cell card_bits = 8;
19 static const cell card_size = (1<<card_bits);
20 static const cell addr_card_mask = (card_size-1);
24 static const cell deck_bits = (card_bits + 10);
25 static const cell deck_size = (1<<deck_bits);
26 static const cell addr_deck_mask = (deck_size-1);