blob: 4f1d6a27c72bd098a3af7bff03f2f5c239f9b562 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
|
/* -----------------------------------------------------------------------------
*
* (c) The GHC Team 1998-2005
*
* Compacting garbage collector
*
* ---------------------------------------------------------------------------*/
#ifndef GCCOMPACT_H
#define GCCOMPACT_H
INLINE_HEADER rtsBool
mark_stack_empty(void)
{
return mark_sp == mark_stack;
}
INLINE_HEADER rtsBool
mark_stack_full(void)
{
return mark_sp >= mark_splim;
}
INLINE_HEADER void
reset_mark_stack(void)
{
mark_sp = mark_stack;
}
INLINE_HEADER void
push_mark_stack(StgPtr p)
{
*mark_sp++ = p;
}
INLINE_HEADER StgPtr
pop_mark_stack(void)
{
return *--mark_sp;
}
INLINE_HEADER void
mark(StgPtr p, bdescr *bd)
{
nat offset_within_block = p - bd->start; // in words
StgPtr bitmap_word = (StgPtr)bd->u.bitmap +
(offset_within_block / (sizeof(W_)*BITS_PER_BYTE));
StgWord bit_mask = (StgWord)1 << (offset_within_block & (sizeof(W_)*BITS_PER_BYTE - 1));
*bitmap_word |= bit_mask;
}
INLINE_HEADER void
unmark(StgPtr p, bdescr *bd)
{
nat offset_within_block = p - bd->start; // in words
StgPtr bitmap_word = (StgPtr)bd->u.bitmap +
(offset_within_block / (sizeof(W_)*BITS_PER_BYTE));
StgWord bit_mask = (StgWord)1 << (offset_within_block & (sizeof(W_)*BITS_PER_BYTE - 1));
*bitmap_word &= ~bit_mask;
}
INLINE_HEADER StgWord
is_marked(StgPtr p, bdescr *bd)
{
nat offset_within_block = p - bd->start; // in words
StgPtr bitmap_word = (StgPtr)bd->u.bitmap +
(offset_within_block / (sizeof(W_)*BITS_PER_BYTE));
StgWord bit_mask = (StgWord)1 << (offset_within_block & (sizeof(W_)*BITS_PER_BYTE - 1));
return (*bitmap_word & bit_mask);
}
void compact(void);
#endif /* GCCOMPACT_H */
|
