FFmpeg
stdatomic.h
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1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
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8  *
9  * FFmpeg is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 /*
20  * based on vlc_atomic.h from VLC
21  * Copyright (C) 2010 RĂ©mi Denis-Courmont
22  */
23 
24 #ifndef COMPAT_ATOMICS_GCC_STDATOMIC_H
25 #define COMPAT_ATOMICS_GCC_STDATOMIC_H
26 
27 #include <stddef.h>
28 #include <stdint.h>
29 
30 #define ATOMIC_FLAG_INIT 0
31 
32 #define ATOMIC_VAR_INIT(value) (value)
33 
34 #define atomic_init(obj, value) \
35 do { \
36  *(obj) = (value); \
37 } while(0)
38 
39 #define kill_dependency(y) ((void)0)
40 
41 #define atomic_thread_fence(order) \
42  __sync_synchronize()
43 
44 #define atomic_signal_fence(order) \
45  ((void)0)
46 
47 #define atomic_is_lock_free(obj) 0
48 
49 typedef _Bool atomic_flag;
50 typedef _Bool atomic_bool;
51 typedef char atomic_char;
52 typedef signed char atomic_schar;
53 typedef unsigned char atomic_uchar;
54 typedef short atomic_short;
55 typedef unsigned short atomic_ushort;
56 typedef int atomic_int;
57 typedef unsigned int atomic_uint;
58 typedef long atomic_long;
59 typedef unsigned long atomic_ulong;
60 typedef long long atomic_llong;
61 typedef unsigned long long atomic_ullong;
62 typedef wchar_t atomic_wchar_t;
63 typedef int_least8_t atomic_int_least8_t;
64 typedef uint_least8_t atomic_uint_least8_t;
65 typedef int_least16_t atomic_int_least16_t;
66 typedef uint_least16_t atomic_uint_least16_t;
67 typedef int_least32_t atomic_int_least32_t;
68 typedef uint_least32_t atomic_uint_least32_t;
69 typedef int_least64_t atomic_int_least64_t;
70 typedef uint_least64_t atomic_uint_least64_t;
71 typedef int_fast8_t atomic_int_fast8_t;
72 typedef uint_fast8_t atomic_uint_fast8_t;
73 typedef int_fast16_t atomic_int_fast16_t;
74 typedef uint_fast16_t atomic_uint_fast16_t;
75 typedef int_fast32_t atomic_int_fast32_t;
76 typedef uint_fast32_t atomic_uint_fast32_t;
77 typedef int_fast64_t atomic_int_fast64_t;
78 typedef uint_fast64_t atomic_uint_fast64_t;
79 typedef intptr_t atomic_intptr_t;
80 typedef uintptr_t atomic_uintptr_t;
81 typedef size_t atomic_size_t;
82 typedef ptrdiff_t atomic_ptrdiff_t;
83 typedef intmax_t atomic_intmax_t;
84 typedef uintmax_t atomic_uintmax_t;
85 
86 #define atomic_store(object, desired) \
87 do { \
88  *(object) = (desired); \
89  __sync_synchronize(); \
90 } while (0)
91 
92 #define atomic_store_explicit(object, desired, order) \
93  atomic_store(object, desired)
94 
95 #define atomic_load(object) \
96  (__sync_synchronize(), *(object))
97 
98 #define atomic_load_explicit(object, order) \
99  atomic_load(object)
100 
101 #define atomic_exchange(object, desired) \
102 ({ \
103  __typeof__(object) _obj = (object); \
104  __typeof__(*object) _old; \
105  do \
106  _old = atomic_load(_obj); \
107  while (!__sync_bool_compare_and_swap(_obj, _old, (desired))); \
108  _old; \
109 })
110 
111 #define atomic_exchange_explicit(object, desired, order) \
112  atomic_exchange(object, desired)
113 
114 #define atomic_compare_exchange_strong(object, expected, desired) \
115 ({ \
116  __typeof__(object) _exp = (expected); \
117  __typeof__(*object) _old = *_exp; \
118  *_exp = __sync_val_compare_and_swap((object), _old, (desired)); \
119  *_exp == _old; \
120 })
121 
122 #define atomic_compare_exchange_strong_explicit(object, expected, desired, success, failure) \
123  atomic_compare_exchange_strong(object, expected, desired)
124 
125 #define atomic_compare_exchange_weak(object, expected, desired) \
126  atomic_compare_exchange_strong(object, expected, desired)
127 
128 #define atomic_compare_exchange_weak_explicit(object, expected, desired, success, failure) \
129  atomic_compare_exchange_weak(object, expected, desired)
130 
131 #define atomic_fetch_add(object, operand) \
132  __sync_fetch_and_add(object, operand)
133 
134 #define atomic_fetch_add_explicit(object, operand, order) \
135  atomic_fetch_add(object, operand)
136 
137 #define atomic_fetch_sub(object, operand) \
138  __sync_fetch_and_sub(object, operand)
139 
140 #define atomic_fetch_sub_explicit(object, operand, order) \
141  atomic_fetch_sub(object, operand)
142 
143 #define atomic_fetch_or(object, operand) \
144  __sync_fetch_and_or(object, operand)
145 
146 #define atomic_fetch_or_explicit(object, operand, order) \
147  atomic_fetch_or(object, operand)
148 
149 #define atomic_fetch_xor(object, operand) \
150  __sync_fetch_and_xor(object, operand)
151 
152 #define atomic_fetch_xor_explicit(object, operand, order) \
153  atomic_fetch_xor(object, operand)
154 
155 #define atomic_fetch_and(object, operand) \
156  __sync_fetch_and_and(object, operand)
157 
158 #define atomic_fetch_and_explicit(object, operand, order) \
159  atomic_fetch_and(object, operand)
160 
161 #define atomic_flag_test_and_set(object) \
162  atomic_exchange(object, 1)
163 
164 #define atomic_flag_test_and_set_explicit(object, order) \
165  atomic_flag_test_and_set(object)
166 
167 #define atomic_flag_clear(object) \
168  atomic_store(object, 0)
169 
170 #define atomic_flag_clear_explicit(object, order) \
171  atomic_flag_clear(object)
172 
173 #endif /* COMPAT_ATOMICS_GCC_STDATOMIC_H */
intptr_t atomic_flag
Definition: stdatomic.h:48
intptr_t atomic_bool
Definition: stdatomic.h:49
intptr_t atomic_uint_fast8_t
Definition: stdatomic.h:71
intptr_t atomic_ushort
Definition: stdatomic.h:54
intptr_t atomic_int
Definition: stdatomic.h:55
intptr_t atomic_int_least8_t
Definition: stdatomic.h:62
intptr_t atomic_long
Definition: stdatomic.h:57
intptr_t atomic_int_least32_t
Definition: stdatomic.h:66
intptr_t atomic_int_fast16_t
Definition: stdatomic.h:72
intptr_t atomic_uintptr_t
Definition: stdatomic.h:79
intptr_t atomic_size_t
Definition: stdatomic.h:80
intptr_t atomic_int_fast32_t
Definition: stdatomic.h:74
intptr_t atomic_schar
Definition: stdatomic.h:51
intptr_t atomic_llong
Definition: stdatomic.h:59
intptr_t atomic_int_fast8_t
Definition: stdatomic.h:70
intptr_t atomic_ulong
Definition: stdatomic.h:58
intptr_t atomic_uint_fast16_t
Definition: stdatomic.h:73
intptr_t atomic_int_least16_t
Definition: stdatomic.h:64
intptr_t atomic_uint
Definition: stdatomic.h:56
intptr_t atomic_uint_fast32_t
Definition: stdatomic.h:75
intptr_t atomic_uint_least32_t
Definition: stdatomic.h:67
intptr_t atomic_int_fast64_t
Definition: stdatomic.h:76
intptr_t atomic_uchar
Definition: stdatomic.h:52
intptr_t atomic_short
Definition: stdatomic.h:53
intptr_t atomic_uint_least16_t
Definition: stdatomic.h:65
intptr_t atomic_intptr_t
Definition: stdatomic.h:78
intptr_t atomic_intmax_t
Definition: stdatomic.h:82
intptr_t atomic_uint_fast64_t
Definition: stdatomic.h:77
intptr_t atomic_ullong
Definition: stdatomic.h:60
intptr_t atomic_uintmax_t
Definition: stdatomic.h:83
intptr_t atomic_int_least64_t
Definition: stdatomic.h:68
intptr_t atomic_char
Definition: stdatomic.h:50
intptr_t atomic_ptrdiff_t
Definition: stdatomic.h:81
intptr_t atomic_wchar_t
Definition: stdatomic.h:61
intptr_t atomic_uint_least8_t
Definition: stdatomic.h:63
intptr_t atomic_uint_least64_t
Definition: stdatomic.h:69