aboutsummaryrefslogtreecommitdiffstats
path: root/compat/atomics/gcc/stdatomic.h
blob: e13ed0e068b8fb50c7a69ca19a2600dae31a5a21 (plain) (blame)
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
/*
 * 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_GCC_STDATOMIC_H
#define COMPAT_ATOMICS_GCC_STDATOMIC_H

#include <stddef.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_thread_fence(order) \
    __sync_synchronize()

#define atomic_signal_fence(order) \
    ((void)0)

#define atomic_is_lock_free(obj) 0

typedef         _Bool      atomic_flag;
typedef         _Bool      atomic_bool;
typedef          char      atomic_char;
typedef   signed char      atomic_schar;
typedef unsigned char      atomic_uchar;
typedef          short     atomic_short;
typedef unsigned short     atomic_ushort;
typedef          int       atomic_int;
typedef unsigned int       atomic_uint;
typedef          long      atomic_long;
typedef unsigned long      atomic_ulong;
typedef          long long atomic_llong;
typedef unsigned long long atomic_ullong;
typedef          wchar_t   atomic_wchar_t;
typedef       int_least8_t atomic_int_least8_t;
typedef      uint_least8_t atomic_uint_least8_t;
typedef      int_least16_t atomic_int_least16_t;
typedef     uint_least16_t atomic_uint_least16_t;
typedef      int_least32_t atomic_int_least32_t;
typedef     uint_least32_t atomic_uint_least32_t;
typedef      int_least64_t atomic_int_least64_t;
typedef     uint_least64_t atomic_uint_least64_t;
typedef       int_fast8_t atomic_int_fast8_t;
typedef      uint_fast8_t atomic_uint_fast8_t;
typedef      int_fast16_t atomic_int_fast16_t;
typedef     uint_fast16_t atomic_uint_fast16_t;
typedef      int_fast32_t atomic_int_fast32_t;
typedef     uint_fast32_t atomic_uint_fast32_t;
typedef      int_fast64_t atomic_int_fast64_t;
typedef     uint_fast64_t atomic_uint_fast64_t;
typedef          intptr_t atomic_intptr_t;
typedef         uintptr_t atomic_uintptr_t;
typedef            size_t atomic_size_t;
typedef         ptrdiff_t atomic_ptrdiff_t;
typedef          intmax_t atomic_intmax_t;
typedef         uintmax_t atomic_uintmax_t;

#define atomic_store(object, desired)   \
do {                                    \
    *(object) = (desired);              \
    __sync_synchronize();               \
} while (0)

#define atomic_store_explicit(object, desired, order) \
    atomic_store(object, desired)

#define atomic_load(object) \
    (__sync_synchronize(), *(object))

#define atomic_load_explicit(object, order) \
    atomic_load(object)

#define atomic_exchange(object, desired)                            \
({                                                                  \
    __typeof__(object) _obj = (object);                             \
    __typeof__(*object) _old;                                       \
    do                                                              \
        _old = atomic_load(_obj);                                   \
    while (!__sync_bool_compare_and_swap(_obj, _old, (desired)));   \
    _old;                                                           \
})

#define atomic_exchange_explicit(object, desired, order) \
    atomic_exchange(object, desired)

#define atomic_compare_exchange_strong(object, expected, desired)   \
({                                                                  \
    __typeof__(object) _exp = (expected);                           \
    __typeof__(*object) _old = *_exp;                               \
    *_exp = __sync_val_compare_and_swap((object), _old, (desired)); \
    *_exp == _old;                                                  \
})

#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 atomic_fetch_add(object, operand) \
    __sync_fetch_and_add(object, operand)

#define atomic_fetch_add_explicit(object, operand, order) \
    atomic_fetch_add(object, operand)

#define atomic_fetch_sub(object, operand) \
    __sync_fetch_and_sub(object, operand)

#define atomic_fetch_sub_explicit(object, operand, order) \
    atomic_fetch_sub(object, operand)

#define atomic_fetch_or(object, operand) \
    __sync_fetch_and_or(object, operand)

#define atomic_fetch_or_explicit(object, operand, order) \
    atomic_fetch_or(object, operand)

#define atomic_fetch_xor(object, operand) \
    __sync_fetch_and_xor(object, operand)

#define atomic_fetch_xor_explicit(object, operand, order) \
    atomic_fetch_xor(object, operand)

#define atomic_fetch_and(object, operand) \
    __sync_fetch_and_and(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_GCC_STDATOMIC_H */