forked from php/php-src
-
Notifications
You must be signed in to change notification settings - Fork 0
/
zend_gc.h
161 lines (137 loc) · 4.75 KB
/
zend_gc.h
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
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998-2015 Zend Technologies Ltd. (http://www.zend.com) |
+----------------------------------------------------------------------+
| This source file is subject to version 2.00 of the Zend license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.zend.com/license/2_00.txt. |
| If you did not receive a copy of the Zend license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| [email protected] so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: David Wang <[email protected]> |
| Dmitry Stogov <[email protected]> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#ifndef ZEND_GC_H
#define ZEND_GC_H
#ifndef GC_BENCH
# define GC_BENCH 0
#endif
#if GC_BENCH
# define GC_BENCH_INC(counter) GC_G(counter)++
# define GC_BENCH_DEC(counter) GC_G(counter)--
# define GC_BENCH_PEAK(peak, counter) do { \
if (GC_G(counter) > GC_G(peak)) { \
GC_G(peak) = GC_G(counter); \
} \
} while (0)
#else
# define GC_BENCH_INC(counter)
# define GC_BENCH_DEC(counter)
# define GC_BENCH_PEAK(peak, counter)
#endif
#define GC_COLOR 0xc000
#define GC_BLACK 0x0000
#define GC_WHITE 0x8000
#define GC_GREY 0x4000
#define GC_PURPLE 0xc000
#define GC_ADDRESS(v) \
((v) & ~GC_COLOR)
#define GC_SET_ADDRESS(v, a) \
do {(v) = ((v) & GC_COLOR) | (a);} while (0)
#define GC_GET_COLOR(v) \
(((zend_uintptr_t)(v)) & GC_COLOR)
#define GC_SET_COLOR(v, c) \
do {(v) = ((v) & ~GC_COLOR) | (c);} while (0)
#define GC_SET_BLACK(v) \
do {(v) = (v) & ~GC_COLOR;} while (0)
#define GC_SET_PURPLE(v) \
do {(v) = (v) | GC_COLOR;} while (0)
#define GC_ZVAL_ADDRESS(v) \
GC_ADDRESS(Z_GC_INFO_P(v))
#define GC_ZVAL_SET_ADDRESS(v, a) \
GC_SET_ADDRESS(Z_GC_INFO_P(v), (a))
#define GC_ZVAL_GET_COLOR(v) \
GC_GET_COLOR(Z_GC_INFO_P(v))
#define GC_ZVAL_SET_COLOR(v, c) \
GC_SET_COLOR(Z_GC_INFO_P(v), (c))
#define GC_ZVAL_SET_BLACK(v) \
GC_SET_BLACK(Z_GC_INFO_P(v))
#define GC_ZVAL_SET_PURPLE(v) \
GC_SET_PURPLE(Z_GC_INFO_P(v))
typedef struct _gc_root_buffer {
zend_refcounted *ref;
struct _gc_root_buffer *next; /* double-linked list */
struct _gc_root_buffer *prev;
uint32_t refcount;
} gc_root_buffer;
typedef struct _zend_gc_globals {
zend_bool gc_enabled;
zend_bool gc_active;
zend_bool gc_full;
gc_root_buffer *buf; /* preallocated arrays of buffers */
gc_root_buffer roots; /* list of possible roots of cycles */
gc_root_buffer *unused; /* list of unused buffers */
gc_root_buffer *first_unused; /* pointer to first unused buffer */
gc_root_buffer *last_unused; /* pointer to last unused buffer */
gc_root_buffer to_free; /* list to free */
gc_root_buffer *next_to_free;
uint32_t gc_runs;
uint32_t collected;
#if GC_BENCH
uint32_t root_buf_length;
uint32_t root_buf_peak;
uint32_t zval_possible_root;
uint32_t zval_buffered;
uint32_t zval_remove_from_buffer;
uint32_t zval_marked_grey;
#endif
} zend_gc_globals;
#ifdef ZTS
BEGIN_EXTERN_C()
ZEND_API extern int gc_globals_id;
END_EXTERN_C()
#define GC_G(v) ZEND_TSRMG(gc_globals_id, zend_gc_globals *, v)
#else
#define GC_G(v) (gc_globals.v)
extern ZEND_API zend_gc_globals gc_globals;
#endif
BEGIN_EXTERN_C()
ZEND_API extern int (*gc_collect_cycles)(void);
ZEND_API void gc_possible_root(zend_refcounted *ref);
ZEND_API void gc_remove_from_buffer(zend_refcounted *ref);
ZEND_API void gc_globals_ctor(void);
ZEND_API void gc_globals_dtor(void);
ZEND_API void gc_init(void);
ZEND_API void gc_reset(void);
/* The default implementation of the gc_collect_cycles callback. */
ZEND_API int zend_gc_collect_cycles(void);
END_EXTERN_C()
#define GC_ZVAL_CHECK_POSSIBLE_ROOT(z) \
gc_check_possible_root((z))
#define GC_REMOVE_FROM_BUFFER(p) do { \
zend_refcounted *_p = (zend_refcounted*)(p); \
if (GC_ADDRESS(GC_INFO(_p))) { \
gc_remove_from_buffer(_p); \
} \
} while (0)
static zend_always_inline void gc_check_possible_root(zval *z)
{
ZVAL_DEREF(z);
if (Z_COLLECTABLE_P(z) && UNEXPECTED(!Z_GC_INFO_P(z))) {
gc_possible_root(Z_COUNTED_P(z));
}
}
#endif /* ZEND_GC_H */
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* indent-tabs-mode: t
* End:
*/