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
|
#include "config.h"
#import <objc/objc.h>
#import "OFExceptions.h"
id
objc_getProperty(id self, SEL _cmd, ptrdiff_t offset, BOOL atomic)
{
if (atomic) {
@synchronized (self) {
id ptr = *(id*)((char*)self + offset);
return [[ptr retain] autorelease];
}
}
return *(id*)((char*)self + offset);
}
void
objc_setProperty(id self, SEL _cmd, ptrdiff_t offset, id value, BOOL atomic,
BOOL copy)
{
if (atomic) {
@synchronized ((atomic ? self : nil)) {
id *ptr = (id*)((char*)self + offset);
id old = *ptr;
switch (copy) {
case 0:
*ptr = [value retain];
break;
case 2:
/*
* Apple uses this to indicate that the copy
* should be mutable. Please hit them for
* abusing a poor BOOL!
*/
*ptr = [value mutableCopy];
break;
default:
*ptr = [value copy];
}
[old release];
return;
}
}
id *ptr = (id*)((char*)self + offset);
id old = *ptr;
switch (copy) {
case 0:
|
>
>
>
>
>
>
<
|
>
>
>
>
>
|
>
>
<
|
>
>
>
>
>
>
>
|
<
|
>
|
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
|
#include "config.h"
#import <objc/objc.h>
#import "OFExceptions.h"
#import "atomic.h"
#define NUM_SPINLOCKS 8 /* needs to be a power of 2 */
#define SPINLOCK_HASH(p) ((uintptr_t)p >> 4) & (NUM_SPINLOCKS - 1)
static of_spinlock_t spinlocks[NUM_SPINLOCKS] = {};
id
objc_getProperty(id self, SEL _cmd, ptrdiff_t offset, BOOL atomic)
{
if (atomic) {
id *ptr = (id*)((char*)self + offset);
unsigned hash = SPINLOCK_HASH(ptr);
of_spinlock_lock(spinlocks[hash]);
@try {
return [[*ptr retain] autorelease];
} @finally {
of_spinlock_unlock(spinlocks[hash]);
}
}
return *(id*)((char*)self + offset);
}
void
objc_setProperty(id self, SEL _cmd, ptrdiff_t offset, id value, BOOL atomic,
BOOL copy)
{
if (atomic) {
id *ptr = (id*)((char*)self + offset);
unsigned hash = SPINLOCK_HASH(ptr);
of_spinlock_lock(spinlocks[hash]);
@try {
id old = *ptr;
switch (copy) {
case 0:
*ptr = [value retain];
break;
case 2:
/*
* Apple uses this to indicate that the copy
* should be mutable. Please hit them for
* abusing a poor BOOL!
*/
*ptr = [value mutableCopy];
break;
default:
*ptr = [value copy];
}
[old release];
} @finally {
of_spinlock_unlock(spinlocks[hash]);
}
return;
}
id *ptr = (id*)((char*)self + offset);
id old = *ptr;
switch (copy) {
case 0:
|