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
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
|
#include "zend.h"
#include "zend_globals.h"
#include "zend_variables.h"
#include "zend_API.h"
#include "zend_objects_API.h"
#define ZEND_DEBUG_OBJECTS 0
void zend_objects_store_init(zend_objects_store *objects, zend_uint init_size)
{
objects->object_buckets = (zend_object_store_bucket *) emalloc(init_size * sizeof(zend_object_bucket));
objects->top = 1; /* Skip 0 so that handles are true */
objects->size = init_size;
objects->free_list_head = -1;
}
void zend_objects_store_destroy(zend_objects_store *objects)
{
efree(objects->object_buckets);
}
void zend_objects_store_call_destructors(zend_objects_store *objects TSRMLS_DC)
{
zend_uint i = 1;
for (i = 1; i < objects->top ; i++) {
if (objects->object_buckets[i].valid) {
struct _store_object *obj = &objects->object_buckets[i].bucket.obj;
if(obj->dtor) {
objects->object_buckets[i].destructor_called = 1;
obj->dtor(obj->object, i TSRMLS_CC);
}
objects->object_buckets[i].valid = 0;
}
}
}
/* Store objects API */
zend_object_handle zend_objects_store_put(void *object, zend_objects_store_dtor_t dtor, zend_objects_store_clone_t clone TSRMLS_DC)
{
zend_object_handle handle;
struct _store_object *obj;
if (EG(objects_store).free_list_head != -1) {
handle = EG(objects_store).free_list_head;
EG(objects_store).free_list_head = EG(objects_store).object_buckets[handle].bucket.free_list.next;
} else {
if (EG(objects_store).top == EG(objects_store).size) {
EG(objects_store).size <<= 1;
EG(objects_store).object_buckets = (zend_object_store_bucket *) erealloc(EG(objects_store).object_buckets, EG(objects_store).size * sizeof(zend_object_store_bucket));
}
handle = EG(objects_store).top++;
}
obj = &EG(objects_store).object_buckets[handle].bucket.obj;
EG(objects_store).object_buckets[handle].valid = 1;
EG(objects_store).object_buckets[handle].destructor_called = 0;
obj->refcount = 1;
obj->object = object;
obj->dtor = dtor;
obj->clone = clone;
#if ZEND_DEBUG_OBJECTS
fprintf(stderr, "Allocated object id #%d\n", handle);
#endif
return handle;
}
void zend_objects_store_add_ref(zval *object TSRMLS_DC)
{
zend_object_handle handle = Z_OBJ_HANDLE_P(object);
if (!EG(objects_store).object_buckets[handle].valid) {
zend_error(E_ERROR, "Trying to add reference to invalid object");
}
EG(objects_store).object_buckets[handle].bucket.obj.refcount++;
#if ZEND_DEBUG_OBJECTS
fprintf(stderr, "Increased refcount of object id #%d\n", handle);
#endif
}
void zend_objects_store_delete_obj(zval *zobject TSRMLS_DC)
{
zend_object_handle handle = Z_OBJ_HANDLE_P(zobject);
struct _store_object *obj = &EG(objects_store).object_buckets[handle].bucket.obj;
if (!EG(objects_store).object_buckets[handle].valid) {
zend_error(E_ERROR, "Trying to delete invalid object");
}
if(obj->dtor && !EG(objects_store).object_buckets[handle].destructor_called) {
EG(objects_store).object_buckets[handle].destructor_called = 1;
obj->dtor(obj->object, handle TSRMLS_CC);
}
EG(objects_store).object_buckets[handle].valid = 0;
#if ZEND_DEBUG_OBJECTS
fprintf(stderr, "Deleted object id #%d\n", handle);
#endif
}
#define ZEND_OBJECTS_STORE_ADD_TO_FREE_LIST() \
EG(objects_store).object_buckets[handle].bucket.free_list.next = EG(objects_store).free_list_head; \
EG(objects_store).free_list_head = handle; \
EG(objects_store).object_buckets[handle].valid = 0;
void zend_objects_store_del_ref(zval *zobject TSRMLS_DC)
{
zend_object_handle handle = Z_OBJ_HANDLE_P(zobject);
struct _store_object *obj = &EG(objects_store).object_buckets[handle].bucket.obj;
if (--obj->refcount == 0) {
if (EG(objects_store).object_buckets[handle].valid) {
if(obj->dtor && !EG(objects_store).object_buckets[handle].destructor_called) {
EG(objects_store).object_buckets[handle].destructor_called = 1;
obj->dtor(obj->object, handle TSRMLS_CC);
}
}
ZEND_OBJECTS_STORE_ADD_TO_FREE_LIST();
#if ZEND_DEBUG_OBJECTS
fprintf(stderr, "Deallocated object id #%d\n", handle);
#endif
}
#if ZEND_DEBUG_OBJECTS
else {
fprintf(stderr, "Decreased refcount of object id #%d\n", handle);
}
#endif
}
zend_object_value zend_objects_store_clone_obj(zval *zobject TSRMLS_DC)
{
zend_object_value retval;
void *new_object;
struct _store_object *obj;
zend_object_handle handle = Z_OBJ_HANDLE_P(zobject);
if (!EG(objects_store).object_buckets[handle].valid) {
zend_error(E_ERROR, "Trying to clone invalid object");
}
obj = &EG(objects_store).object_buckets[handle].bucket.obj;
if(obj->clone == NULL) {
zend_error(E_ERROR, "Trying to clone uncloneable object");
}
obj->clone(&obj->object, &new_object TSRMLS_CC);
retval.handle = zend_objects_store_put(new_object, obj->dtor, obj->clone TSRMLS_CC);
retval.handlers = Z_OBJ_HT_P(zobject);
return retval;
}
void *zend_object_store_get_object(zval *zobject TSRMLS_DC)
{
zend_object_handle handle = Z_OBJ_HANDLE_P(zobject);
if (!EG(objects_store).object_buckets[handle].valid) {
zend_error(E_ERROR, "Trying to access invalid object");
return NULL;
}
return EG(objects_store).object_buckets[handle].bucket.obj.object;
}
/* Proxy objects workings */
typedef struct _zend_proxy_object {
zval *object;
zval *property;
} zend_proxy_object;
static zend_object_handlers zend_object_proxy_handlers;
void zend_objects_proxy_dtor(zend_proxy_object *object, zend_object_handle handle TSRMLS_DC)
{
zval_ptr_dtor(&object->object);
zval_ptr_dtor(&object->property);
efree(object);
}
void zend_objects_proxy_clone(zend_proxy_object *object, zend_proxy_object **object_clone TSRMLS_DC)
{
*object_clone = emalloc(sizeof(zend_proxy_object));
(*object_clone)->object = object->object;
(*object_clone)->property = object->property;
zval_add_ref(&(*object_clone)->property);
zval_add_ref(&(*object_clone)->object);
}
zval **zend_object_create_proxy(zval *object, zval *member TSRMLS_DC)
{
zend_proxy_object *pobj = emalloc(sizeof(zend_proxy_object));
zval *retval, **pretval;
pobj->object = object;
pobj->property = member;
zval_add_ref(&pobj->property);
zval_add_ref(&pobj->object);
MAKE_STD_ZVAL(retval);
retval->type = IS_OBJECT;
Z_OBJ_HANDLE_P(retval) = zend_objects_store_put(pobj, (zend_objects_store_dtor_t)zend_objects_proxy_dtor, (zend_objects_store_clone_t)zend_objects_proxy_clone TSRMLS_CC);
Z_OBJ_HT_P(retval) = &zend_object_proxy_handlers;
pretval = emalloc(sizeof(zval *));
*pretval = retval;
return pretval;
}
void zend_object_proxy_set(zval **property, zval *value TSRMLS_DC)
{
zend_proxy_object *probj = zend_object_store_get_object(*property TSRMLS_CC);
if(Z_OBJ_HT_P(probj->object) && Z_OBJ_HT_P(probj->object)->write_property) {
Z_OBJ_HT_P(probj->object)->write_property(probj->object, probj->property, value TSRMLS_CC);
} else {
zend_error(E_WARNING, "Cannot write property of object - no write handler defined");
}
}
zval* zend_object_proxy_get(zval *property TSRMLS_DC)
{
zend_proxy_object *probj = zend_object_store_get_object(property TSRMLS_CC);
if(Z_OBJ_HT_P(probj->object) && Z_OBJ_HT_P(probj->object)->read_property) {
return Z_OBJ_HT_P(probj->object)->read_property(probj->object, probj->property, BP_VAR_R TSRMLS_CC);
} else {
zend_error(E_WARNING, "Cannot read property of object - no read handler defined");
}
return NULL;
}
static zend_object_handlers zend_object_proxy_handlers = {
ZEND_OBJECTS_STORE_HANDLERS,
NULL, /* read_property */
NULL, /* write_property */
NULL, /* get_property_ptr */
NULL, /* get_property_zval_ptr */
zend_object_proxy_get, /* get */
zend_object_proxy_set, /* set */
NULL, /* has_property */
NULL, /* unset_property */
NULL, /* get_properties */
NULL, /* get_method */
NULL, /* call_method */
NULL, /* get_constructor */
NULL, /* get_class_entry */
NULL, /* get_class_name */
NULL /* compare_objects */
};
|
