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/*
* Copyright 2001-2003 Ximian, Inc
* Copyright 2003-2010 Novell, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef __MONO_SGEN_CARD_TABLE_INLINES_H__
#define __MONO_SGEN_CARD_TABLE_INLINES_H__
#define SGEN_HAVE_CARDTABLE 1
#ifdef SGEN_HAVE_CARDTABLE
void sgen_card_table_reset_region (mword start, mword end) MONO_INTERNAL;
void* sgen_card_table_align_pointer (void *ptr) MONO_INTERNAL;
void sgen_card_table_mark_range (mword address, mword size) MONO_INTERNAL;
void sgen_cardtable_scan_object (char *obj, mword obj_size, guint8 *cards, SgenGrayQueue *queue) MONO_INTERNAL;
gboolean sgen_card_table_get_card_data (guint8 *dest, mword address, mword cards) MONO_INTERNAL;
void sgen_card_table_init (SgenRemeberedSet *remset) MONO_INTERNAL;
/*How many bytes a single card covers*/
#define CARD_BITS 9
/* How many bits of the address space is covered by the card table.
* If this value is smaller than the number of address bits, card aliasing is required.
*/
#define CARD_TABLE_BITS 32
#define CARD_SIZE_IN_BYTES (1 << CARD_BITS)
#define CARD_COUNT_BITS (CARD_TABLE_BITS - CARD_BITS)
#define CARD_COUNT_IN_BYTES (1 << CARD_COUNT_BITS)
#define CARD_MASK ((1 << CARD_COUNT_BITS) - 1)
#if SIZEOF_VOID_P * 8 > CARD_TABLE_BITS
#define SGEN_HAVE_OVERLAPPING_CARDS 1
#endif
extern guint8 *sgen_cardtable MONO_INTERNAL;
#ifdef SGEN_HAVE_OVERLAPPING_CARDS
static inline guint8*
sgen_card_table_get_card_address (mword address)
{
return sgen_cardtable + ((address >> CARD_BITS) & CARD_MASK);
}
extern guint8 *sgen_shadow_cardtable MONO_INTERNAL;
static inline guint8*
sgen_card_table_get_shadow_card_address (mword address)
{
return sgen_shadow_cardtable + ((address >> CARD_BITS) & CARD_MASK);
}
static inline gboolean
sgen_card_table_card_begin_scanning (mword address)
{
return *sgen_card_table_get_shadow_card_address (address) != 0;
}
static inline void
sgen_card_table_prepare_card_for_scanning (guint8 *card)
{
}
#define sgen_card_table_get_card_scan_address sgen_card_table_get_shadow_card_address
#else
static inline guint8*
sgen_card_table_get_card_address (mword address)
{
return sgen_cardtable + (address >> CARD_BITS);
}
static inline gboolean
sgen_card_table_card_begin_scanning (mword address)
{
guint8 *card = sgen_card_table_get_card_address (address);
gboolean res = *card;
*card = 0;
return res;
}
static inline void
sgen_card_table_prepare_card_for_scanning (guint8 *card)
{
*card = 0;
}
#define sgen_card_table_get_card_scan_address sgen_card_table_get_card_address
#endif
static inline gboolean
sgen_card_table_address_is_marked (mword address)
{
return *sgen_card_table_get_card_address (address) != 0;
}
static inline void
sgen_card_table_mark_address (mword address)
{
*sgen_card_table_get_card_address (address) = 1;
}
#else /*if SGEN_HAVE_CARDTABLE */
static inline void
sgen_card_table_mark_address (mword address)
{
g_assert_not_reached ();
}
static inline void
sgen_card_table_mark_range (mword address, mword size)
{
g_assert_not_reached ();
}
#define sgen_card_table_address_is_marked(p) FALSE
#define sgen_card_table_init(p)
guint8*
mono_gc_get_card_table (int *shift_bits, gpointer *mask)
{
return NULL;
}
#endif
#endif
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