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
|
/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* based on vlc_atomic.h from VLC
* Copyright (C) 2010 Rémi Denis-Courmont
*/
#ifndef COMPAT_ATOMICS_PTHREAD_STDATOMIC_H
#define COMPAT_ATOMICS_PTHREAD_STDATOMIC_H
#include <stdint.h>
#define ATOMIC_FLAG_INIT 0
#define ATOMIC_VAR_INIT(value) (value)
#define atomic_init(obj, value) \
do { \
*(obj) = (value); \
} while(0)
#define kill_dependency(y) ((void)0)
#define atomic_signal_fence(order) \
((void)0)
#define atomic_is_lock_free(obj) 0
typedef intptr_t atomic_flag;
typedef intptr_t atomic_bool;
typedef intptr_t atomic_char;
typedef intptr_t atomic_schar;
typedef intptr_t atomic_uchar;
typedef intptr_t atomic_short;
typedef intptr_t atomic_ushort;
typedef intptr_t atomic_int;
typedef intptr_t atomic_uint;
typedef intptr_t atomic_long;
typedef intptr_t atomic_ulong;
typedef intptr_t atomic_llong;
typedef intptr_t atomic_ullong;
typedef intptr_t atomic_wchar_t;
typedef intptr_t atomic_int_least8_t;
typedef intptr_t atomic_uint_least8_t;
typedef intptr_t atomic_int_least16_t;
typedef intptr_t atomic_uint_least16_t;
typedef intptr_t atomic_int_least32_t;
typedef intptr_t atomic_uint_least32_t;
typedef intptr_t atomic_int_least64_t;
typedef intptr_t atomic_uint_least64_t;
typedef intptr_t atomic_int_fast8_t;
typedef intptr_t atomic_uint_fast8_t;
typedef intptr_t atomic_int_fast16_t;
typedef intptr_t atomic_uint_fast16_t;
typedef intptr_t atomic_int_fast32_t;
typedef intptr_t atomic_uint_fast32_t;
typedef intptr_t atomic_int_fast64_t;
typedef intptr_t atomic_uint_fast64_t;
typedef intptr_t atomic_intptr_t;
typedef intptr_t atomic_uintptr_t;
typedef intptr_t atomic_size_t;
typedef intptr_t atomic_ptrdiff_t;
typedef intptr_t atomic_intmax_t;
typedef intptr_t atomic_uintmax_t;
void avpriv_atomic_lock(void);
void avpriv_atomic_unlock(void);
static inline void atomic_thread_fence(int order)
{
avpriv_atomic_lock();
avpriv_atomic_unlock();
}
static inline void atomic_store(intptr_t *object, intptr_t desired)
{
avpriv_atomic_lock();
*object = desired;
avpriv_atomic_unlock();
}
#define atomic_store_explicit(object, desired, order) \
atomic_store(object, desired)
static inline intptr_t atomic_load(intptr_t *object)
{
intptr_t ret;
avpriv_atomic_lock();
ret = *object;
avpriv_atomic_unlock();
return ret;
}
#define atomic_load_explicit(object, order) \
atomic_load(object)
static inline intptr_t atomic_exchange(intptr_t *object, intptr_t desired)
{
intptr_t ret;
avpriv_atomic_lock();
ret = *object;
*object = desired;
avpriv_atomic_unlock();
return ret;
}
#define atomic_exchange_explicit(object, desired, order) \
atomic_exchange(object, desired)
static inline int atomic_compare_exchange_strong(intptr_t *object, intptr_t *expected,
intptr_t desired)
{
int ret;
avpriv_atomic_lock();
if (*object == *expected) {
ret = 1;
*object = desired;
} else {
ret = 0;
*expected = *object;
}
avpriv_atomic_unlock();
return ret;
}
#define atomic_compare_exchange_strong_explicit(object, expected, desired, success, failure) \
atomic_compare_exchange_strong(object, expected, desired)
#define atomic_compare_exchange_weak(object, expected, desired) \
atomic_compare_exchange_strong(object, expected, desired)
#define atomic_compare_exchange_weak_explicit(object, expected, desired, success, failure) \
atomic_compare_exchange_weak(object, expected, desired)
#define FETCH_MODIFY(opname, op) \
static inline intptr_t atomic_fetch_ ## opname(intptr_t *object, intptr_t operand) \
{ \
intptr_t ret; \
avpriv_atomic_lock(); \
ret = *object; \
*object = *object op operand; \
avpriv_atomic_unlock(); \
return ret; \
}
FETCH_MODIFY(add, +)
FETCH_MODIFY(sub, -)
FETCH_MODIFY(or, |)
FETCH_MODIFY(xor, ^)
FETCH_MODIFY(and, &)
#undef FETCH_MODIFY
#define atomic_fetch_add_explicit(object, operand, order) \
atomic_fetch_add(object, operand)
#define atomic_fetch_sub_explicit(object, operand, order) \
atomic_fetch_sub(object, operand)
#define atomic_fetch_or_explicit(object, operand, order) \
atomic_fetch_or(object, operand)
#define atomic_fetch_xor_explicit(object, operand, order) \
atomic_fetch_sub(object, operand)
#define atomic_fetch_and_explicit(object, operand, order) \
atomic_fetch_and(object, operand)
#define atomic_flag_test_and_set(object) \
atomic_exchange(object, 1)
#define atomic_flag_test_and_set_explicit(object, order) \
atomic_flag_test_and_set(object)
#define atomic_flag_clear(object) \
atomic_store(object, 0)
#define atomic_flag_clear_explicit(object, order) \
atomic_flag_clear(object)
#endif /* COMPAT_ATOMICS_PTHREAD_STDATOMIC_H */
|
