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
|
#include <stdio.h>
#include <stdlib.h>
#import "ObjFWRT.h"
#import "private.h"
#ifdef OF_HAVE_THREADS
# import "mutex.h"
static struct lock_s {
id object;
int count;
of_rmutex_t rmutex;
struct lock_s *next;
} *locks = NULL;
static of_mutex_t mutex;
OF_CONSTRUCTOR()
{
if (of_mutex_new(&mutex) != 0)
OBJC_ERROR("Failed to create mutex!");
}
#endif
int
objc_sync_enter(id object)
{
if (object == nil)
return 0;
#ifdef OF_HAVE_THREADS
struct lock_s *lock;
if (of_mutex_lock(&mutex) != 0)
OBJC_ERROR("Failed to lock mutex!");
/* Look if we already have a lock */
for (lock = locks; lock != NULL; lock = lock->next) {
if (lock->object != object)
continue;
lock->count++;
if (of_mutex_unlock(&mutex) != 0)
OBJC_ERROR("Failed to unlock mutex!");
if (of_rmutex_lock(&lock->rmutex) != 0)
OBJC_ERROR("Failed to lock mutex!");
return 0;
}
/* Create a new lock */
if ((lock = malloc(sizeof(*lock))) == NULL)
OBJC_ERROR("Failed to allocate memory for mutex!");
if (of_rmutex_new(&lock->rmutex) != 0)
OBJC_ERROR("Failed to create mutex!");
lock->object = object;
lock->count = 1;
lock->next = locks;
locks = lock;
if (of_mutex_unlock(&mutex) != 0)
OBJC_ERROR("Failed to unlock mutex!");
if (of_rmutex_lock(&lock->rmutex) != 0)
OBJC_ERROR("Failed to lock mutex!");
#endif
return 0;
}
int
objc_sync_exit(id object)
{
if (object == nil)
return 0;
#ifdef OF_HAVE_THREADS
struct lock_s *lock, *last = NULL;
if (of_mutex_lock(&mutex) != 0)
OBJC_ERROR("Failed to lock mutex!");
for (lock = locks; lock != NULL; lock = lock->next) {
if (lock->object != object) {
last = lock;
continue;
}
if (of_rmutex_unlock(&lock->rmutex) != 0)
OBJC_ERROR("Failed to unlock mutex!");
if (--lock->count == 0) {
if (of_rmutex_free(&lock->rmutex) != 0)
OBJC_ERROR("Failed to destroy mutex!");
if (last != NULL)
last->next = lock->next;
if (locks == lock)
locks = lock->next;
free(lock);
}
if (of_mutex_unlock(&mutex) != 0)
OBJC_ERROR("Failed to unlock mutex!");
return 0;
}
OBJC_ERROR("objc_sync_exit() was called for an object not locked!");
#else
return 0;
#endif
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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
|
#include <stdio.h>
#include <stdlib.h>
#import "ObjFWRT.h"
#import "private.h"
#ifdef OF_HAVE_THREADS
# import "OFPlainMutex.h"
static struct lock {
id object;
int count;
OFPlainRecursiveMutex rmutex;
struct lock *next;
} *locks = NULL;
static OFPlainMutex mutex;
OF_CONSTRUCTOR()
{
if (OFPlainMutexNew(&mutex) != 0)
OBJC_ERROR("Failed to create mutex!");
}
#endif
int
objc_sync_enter(id object)
{
if (object == nil)
return 0;
#ifdef OF_HAVE_THREADS
struct lock *lock;
if (OFPlainMutexLock(&mutex) != 0)
OBJC_ERROR("Failed to lock mutex!");
/* Look if we already have a lock */
for (lock = locks; lock != NULL; lock = lock->next) {
if (lock->object != object)
continue;
lock->count++;
if (OFPlainMutexUnlock(&mutex) != 0)
OBJC_ERROR("Failed to unlock mutex!");
if (OFPlainRecursiveMutexLock(&lock->rmutex) != 0)
OBJC_ERROR("Failed to lock mutex!");
return 0;
}
/* Create a new lock */
if ((lock = malloc(sizeof(*lock))) == NULL)
OBJC_ERROR("Failed to allocate memory for mutex!");
if (OFPlainRecursiveMutexNew(&lock->rmutex) != 0)
OBJC_ERROR("Failed to create mutex!");
lock->object = object;
lock->count = 1;
lock->next = locks;
locks = lock;
if (OFPlainMutexUnlock(&mutex) != 0)
OBJC_ERROR("Failed to unlock mutex!");
if (OFPlainRecursiveMutexLock(&lock->rmutex) != 0)
OBJC_ERROR("Failed to lock mutex!");
#endif
return 0;
}
int
objc_sync_exit(id object)
{
if (object == nil)
return 0;
#ifdef OF_HAVE_THREADS
struct lock *lock, *last = NULL;
if (OFPlainMutexLock(&mutex) != 0)
OBJC_ERROR("Failed to lock mutex!");
for (lock = locks; lock != NULL; lock = lock->next) {
if (lock->object != object) {
last = lock;
continue;
}
if (OFPlainRecursiveMutexUnlock(&lock->rmutex) != 0)
OBJC_ERROR("Failed to unlock mutex!");
if (--lock->count == 0) {
if (OFPlainRecursiveMutexFree(&lock->rmutex) != 0)
OBJC_ERROR("Failed to destroy mutex!");
if (last != NULL)
last->next = lock->next;
if (locks == lock)
locks = lock->next;
free(lock);
}
if (OFPlainMutexUnlock(&mutex) != 0)
OBJC_ERROR("Failed to unlock mutex!");
return 0;
}
OBJC_ERROR("objc_sync_exit() was called for an object not locked!");
#else
return 0;
#endif
}
|