/**
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* \file
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* Copyright 2001-2003 Ximian, Inc
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* Copyright 2003-2010 Novell, Inc.
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*
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* Licensed under the MIT license. See LICENSE file in the project root for full license information.
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*/
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#ifndef __MONO_SGEN_CARD_TABLE_INLINES_H__
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#define __MONO_SGEN_CARD_TABLE_INLINES_H__
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/*WARNING: This function returns the number of cards regardless of overflow in case of overlapping cards.*/
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mword sgen_card_table_number_of_cards_in_range (mword address, mword size);
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guint8* sgen_find_next_card (guint8 *card_data, guint8 *end);
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void sgen_card_table_reset_region (mword start, mword end);
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void* sgen_card_table_align_pointer (void *ptr);
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void sgen_card_table_mark_range (mword address, mword size);
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void sgen_cardtable_scan_object (GCObject *obj, mword obj_size, guint8 *cards,
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ScanCopyContext ctx);
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gboolean sgen_card_table_get_card_data (guint8 *dest, mword address, mword cards);
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guint8* sgen_card_table_alloc_mod_union (char *obj, mword obj_size);
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void sgen_card_table_free_mod_union (guint8 *mod_union, char *obj, mword obj_size);
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void sgen_card_table_update_mod_union_from_cards (guint8 *dest, guint8 *start_card, size_t num_cards);
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void sgen_card_table_update_mod_union (guint8 *dest, char *obj, mword obj_size, size_t *out_num_cards);
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void sgen_card_table_preclean_mod_union (guint8 *cards, guint8 *cards_preclean, size_t num_cards);
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guint8* sgen_get_card_table_configuration (int *shift_bits, gpointer *mask);
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void sgen_card_table_init (SgenRememberedSet *remset);
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/*How many bytes a single card covers*/
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#define CARD_BITS 9
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/* How many bits of the address space is covered by the card table.
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* If this value is smaller than the number of address bits, card aliasing is required.
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*/
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#define CARD_TABLE_BITS 32
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#define CARD_SIZE_IN_BYTES (1 << CARD_BITS)
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#define CARD_COUNT_BITS (CARD_TABLE_BITS - CARD_BITS)
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#define CARD_COUNT_IN_BYTES (1 << CARD_COUNT_BITS)
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#define CARD_MASK ((1 << CARD_COUNT_BITS) - 1)
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#if SIZEOF_VOID_P * 8 > CARD_TABLE_BITS
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#define SGEN_HAVE_OVERLAPPING_CARDS 1
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#endif
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extern guint8 *sgen_cardtable;
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#ifdef SGEN_HAVE_OVERLAPPING_CARDS
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static inline guint8*
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sgen_card_table_get_card_address (mword address)
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{
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return sgen_cardtable + ((address >> CARD_BITS) & CARD_MASK);
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}
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extern guint8 *sgen_shadow_cardtable;
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#define SGEN_SHADOW_CARDTABLE_END (sgen_shadow_cardtable + CARD_COUNT_IN_BYTES)
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static inline guint8*
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sgen_card_table_get_shadow_card_address (mword address)
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{
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return sgen_shadow_cardtable + ((address >> CARD_BITS) & CARD_MASK);
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}
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static inline gboolean
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sgen_card_table_card_begin_scanning (mword address)
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{
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return *sgen_card_table_get_shadow_card_address (address) != 0;
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}
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static inline void
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sgen_card_table_prepare_card_for_scanning (guint8 *card)
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{
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}
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#define sgen_card_table_get_card_scan_address sgen_card_table_get_shadow_card_address
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#else
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static inline guint8*
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sgen_card_table_get_card_address (mword address)
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{
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return sgen_cardtable + (address >> CARD_BITS);
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}
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static inline gboolean
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sgen_card_table_card_begin_scanning (mword address)
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{
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guint8 *card = sgen_card_table_get_card_address (address);
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gboolean res = *card;
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*card = 0;
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return res;
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}
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static inline void
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sgen_card_table_prepare_card_for_scanning (guint8 *card)
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{
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*card = 0;
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}
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#define sgen_card_table_get_card_scan_address sgen_card_table_get_card_address
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#endif
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static inline gboolean
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sgen_card_table_address_is_marked (mword address)
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{
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return *sgen_card_table_get_card_address (address) != 0;
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}
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static inline void
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sgen_card_table_mark_address (mword address)
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{
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*sgen_card_table_get_card_address (address) = 1;
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}
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static inline size_t
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sgen_card_table_get_card_offset (char *ptr, char *base)
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{
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return (ptr - base) >> CARD_BITS;
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}
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#endif
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