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
|
#ifndef __TOOLS_LINUX_ATOMIC_H
#define __TOOLS_LINUX_ATOMIC_H
#include <linux/compiler.h>
#include <linux/types.h>
#define xchg(p, v) \
__atomic_exchange_n(p, v, __ATOMIC_SEQ_CST)
#define xchg_acquire(p, v) \
__atomic_exchange_n(p, v, __ATOMIC_ACQUIRE)
#define cmpxchg(p, old, new) \
({ \
typeof(*(p)) __old = (old); \
\
__atomic_compare_exchange_n((p), &__old, new, false, \
__ATOMIC_SEQ_CST, \
__ATOMIC_SEQ_CST); \
__old; \
})
#define cmpxchg_acquire(p, old, new) \
({ \
typeof(*(p)) __old = (old); \
\
__atomic_compare_exchange_n((p), &__old, new, false, \
__ATOMIC_ACQUIRE, \
__ATOMIC_ACQUIRE); \
__old; \
})
#define smp_mb__before_atomic() __atomic_thread_fence(__ATOMIC_SEQ_CST)
#define smp_mb__after_atomic() __atomic_thread_fence(__ATOMIC_SEQ_CST)
#define smp_wmb() __atomic_thread_fence(__ATOMIC_SEQ_CST)
#define smp_rmb() __atomic_thread_fence(__ATOMIC_SEQ_CST)
#define smp_mb() __atomic_thread_fence(__ATOMIC_SEQ_CST)
#define smp_read_barrier_depends()
#define smp_store_mb(var, value) do { WRITE_ONCE(var, value); smp_mb(); } while (0)
#define smp_load_acquire(p) \
({ \
typeof(*p) ___p1 = READ_ONCE(*p); \
smp_mb(); \
___p1; \
})
#define smp_store_release(p, v) \
do { \
smp_mb(); \
WRITE_ONCE(*p, v); \
} while (0)
typedef struct {
int counter;
} atomic_t;
static inline int atomic_read(const atomic_t *v)
{
return __atomic_load_n(&v->counter, __ATOMIC_RELAXED);
}
static inline void atomic_set(atomic_t *v, int i)
{
__atomic_store_n(&v->counter, i, __ATOMIC_RELAXED);
}
static inline int atomic_add_return(int i, atomic_t *v)
{
return __atomic_add_fetch(&v->counter, i, __ATOMIC_RELAXED);
}
static inline int atomic_sub_return(int i, atomic_t *v)
{
return __atomic_sub_fetch(&v->counter, i, __ATOMIC_RELAXED);
}
static inline int atomic_add_negative(int i, atomic_t *v)
{
return atomic_add_return(i, v) < 0;
}
static inline void atomic_add(int i, atomic_t *v)
{
atomic_add_return(i, v);
}
static inline void atomic_sub(int i, atomic_t *v)
{
atomic_sub_return(i, v);
}
static inline void atomic_inc(atomic_t *v)
{
atomic_add(1, v);
}
static inline void atomic_dec(atomic_t *v)
{
atomic_sub(1, v);
}
#define atomic_dec_return(v) atomic_sub_return(1, (v))
#define atomic_inc_return(v) atomic_add_return(1, (v))
#define atomic_sub_and_test(i, v) (atomic_sub_return((i), (v)) == 0)
#define atomic_dec_and_test(v) (atomic_dec_return(v) == 0)
#define atomic_inc_and_test(v) (atomic_inc_return(v) == 0)
#define atomic_xchg(ptr, v) (xchg(&(ptr)->counter, (v)))
#define atomic_cmpxchg(v, old, new) (cmpxchg(&((v)->counter), (old), (new)))
static inline int atomic_add_unless(atomic_t *v, int a, int u)
{
int c, old;
c = atomic_read(v);
while (c != u && (old = atomic_cmpxchg(v, c, c + a)) != c)
c = old;
return c;
}
#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
typedef struct {
long counter;
} atomic_long_t;
static inline long atomic_long_read(const atomic_long_t *v)
{
return __atomic_load_n(&v->counter, __ATOMIC_RELAXED);
}
static inline void atomic_long_set(atomic_long_t *v, long i)
{
__atomic_store_n(&v->counter, i, __ATOMIC_RELAXED);
}
static inline long atomic_long_add_return(long i, atomic_long_t *v)
{
return __atomic_add_fetch(&v->counter, i, __ATOMIC_RELAXED);
}
static inline long atomic_long_sub_return(long i, atomic_long_t *v)
{
return __atomic_sub_fetch(&v->counter, i, __ATOMIC_RELAXED);
}
static inline void atomic_long_add(long i, atomic_long_t *v)
{
atomic_long_add_return(i, v);
}
static inline void atomic_long_sub(long i, atomic_long_t *v)
{
atomic_long_sub_return(i, v);
}
static inline void atomic_long_inc(atomic_long_t *v)
{
atomic_long_add(1, v);
}
static inline void atomic_long_dec(atomic_long_t *v)
{
atomic_long_sub(1, v);
}
static inline long atomic_long_cmpxchg(atomic_long_t *v, long old, long new)
{
return cmpxchg(&v->counter, old, new);
}
static inline bool atomic_long_inc_not_zero(atomic_long_t *i)
{
long old, v = atomic_long_read(i);
do {
if (!(old = v))
return false;
} while ((v = atomic_long_cmpxchg(i, old, old + 1)) != old);
return true;
}
#define atomic_long_sub_and_test(i, v) (atomic_long_sub_return((i), (v)) == 0)
typedef struct {
u64 counter;
} atomic64_t;
static inline s64 atomic64_read(const atomic64_t *v)
{
return __atomic_load_n(&v->counter, __ATOMIC_RELAXED);
}
static inline void atomic64_set(atomic64_t *v, s64 i)
{
__atomic_store_n(&v->counter, i, __ATOMIC_RELAXED);
}
static inline s64 atomic64_add_return(s64 i, atomic64_t *v)
{
return __atomic_add_fetch(&v->counter, i, __ATOMIC_RELAXED);
}
static inline s64 atomic64_sub_return(s64 i, atomic64_t *v)
{
return __atomic_sub_fetch(&v->counter, i, __ATOMIC_RELAXED);
}
static inline void atomic64_add(s64 i, atomic64_t *v)
{
atomic64_add_return(i, v);
}
static inline void atomic64_sub(s64 i, atomic64_t *v)
{
atomic64_sub_return(i, v);
}
static inline void atomic64_inc(atomic64_t *v)
{
atomic64_add(1, v);
}
static inline void atomic64_dec(atomic64_t *v)
{
atomic64_sub(1, v);
}
#define atomic64_dec_return(v) atomic64_sub_return(1, (v))
#define atomic64_inc_return(v) atomic64_add_return(1, (v))
static inline s64 atomic64_cmpxchg(atomic64_t *v, s64 old, s64 new)
{
return cmpxchg(&v->counter, old, new);
}
static inline s64 atomic64_cmpxchg_acquire(atomic64_t *v, s64 old, s64 new)
{
return cmpxchg_acquire(&v->counter, old, new);
}
static inline s64 atomic64_add_return_release(s64 i, atomic64_t *v)
{
return __atomic_add_fetch(&v->counter, i, __ATOMIC_RELEASE);
}
#endif /* __TOOLS_LINUX_ATOMIC_H */
|
