| ︙ | | |
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
|
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
|
-
+
-
+
|
struct weak_ref {
id **locations;
size_t count;
};
static struct objc_hashtable *hashtable;
#ifdef OF_HAVE_THREADS
static of_spinlock_t spinlock;
static OFSpinlock spinlock;
#endif
static uint32_t
hash(const void *object)
{
return (uint32_t)(uintptr_t)object;
}
static bool
equal(const void *object1, const void *object2)
{
return (object1 == object2);
}
OF_CONSTRUCTOR()
{
hashtable = objc_hashtable_new(hash, equal, 2);
#ifdef OF_HAVE_THREADS
if (of_spinlock_new(&spinlock) != 0)
if (OFSpinlockNew(&spinlock) != 0)
OBJC_ERROR("Failed to create spinlock!");
#endif
}
id
objc_retain(id object)
{
|
| ︙ | | |
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
-
+
|
id
objc_storeWeak(id *object, id value)
{
struct weak_ref *old;
#ifdef OF_HAVE_THREADS
if (of_spinlock_lock(&spinlock) != 0)
if (OFSpinlockLock(&spinlock) != 0)
OBJC_ERROR("Failed to lock spinlock!");
#endif
if (*object != nil &&
(old = objc_hashtable_get(hashtable, *object)) != NULL) {
for (size_t i = 0; i < old->count; i++) {
if (old->locations[i] == object) {
|
| ︙ | | |
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
|
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
|
-
+
-
+
-
+
|
ref->locations[ref->count++] = object;
} else
value = nil;
*object = value;
#ifdef OF_HAVE_THREADS
if (of_spinlock_unlock(&spinlock) != 0)
if (OFSpinlockUnlock(&spinlock) != 0)
OBJC_ERROR("Failed to unlock spinlock!");
#endif
return value;
}
id
objc_loadWeakRetained(id *object)
{
id value = nil;
struct weak_ref *ref;
#ifdef OF_HAVE_THREADS
if (of_spinlock_lock(&spinlock) != 0)
if (OFSpinlockLock(&spinlock) != 0)
OBJC_ERROR("Failed to lock spinlock!");
#endif
if (*object != nil &&
(ref = objc_hashtable_get(hashtable, *object)) != NULL)
value = *object;
#ifdef OF_HAVE_THREADS
if (of_spinlock_unlock(&spinlock) != 0)
if (OFSpinlockUnlock(&spinlock) != 0)
OBJC_ERROR("Failed to unlock spinlock!");
#endif
if (class_respondsToSelector(object_getClass(value),
@selector(retainWeakReference)) && [value retainWeakReference])
return value;
|
| ︙ | | |
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
|
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
|
-
+
-
+
-
+
-
+
|
void
objc_moveWeak(id *dest, id *src)
{
struct weak_ref *ref;
#ifdef OF_HAVE_THREADS
if (of_spinlock_lock(&spinlock) != 0)
if (OFSpinlockLock(&spinlock) != 0)
OBJC_ERROR("Failed to lock spinlock!");
#endif
if (*src != nil &&
(ref = objc_hashtable_get(hashtable, *src)) != NULL) {
for (size_t i = 0; i < ref->count; i++) {
if (ref->locations[i] == src) {
ref->locations[i] = dest;
break;
}
}
}
*dest = *src;
*src = nil;
#ifdef OF_HAVE_THREADS
if (of_spinlock_unlock(&spinlock) != 0)
if (OFSpinlockUnlock(&spinlock) != 0)
OBJC_ERROR("Failed to unlock spinlock!");
#endif
}
void
objc_zero_weak_references(id value)
{
struct weak_ref *ref;
#ifdef OF_HAVE_THREADS
if (of_spinlock_lock(&spinlock) != 0)
if (OFSpinlockLock(&spinlock) != 0)
OBJC_ERROR("Failed to lock spinlock!");
#endif
if ((ref = objc_hashtable_get(hashtable, value)) != NULL) {
for (size_t i = 0; i < ref->count; i++)
*ref->locations[i] = nil;
objc_hashtable_delete(hashtable, value);
free(ref->locations);
free(ref);
}
#ifdef OF_HAVE_THREADS
if (of_spinlock_unlock(&spinlock) != 0)
if (OFSpinlockUnlock(&spinlock) != 0)
OBJC_ERROR("Failed to unlock spinlock!");
#endif
}
|