Adapted from the code by Rémi Denis-Courmont from VLC This merges libav commit f9a6a80e065cdb95b233978f1d96ec9bc863daa1.
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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 | ||
| 7 | * version 2.1 of the License, or (at your option) any later version. | ||
| 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 Rémi Denis-Courmont | ||
| 22 | */ | ||
| 23 | |||
| 24 | #include <pthread.h> | ||
| 25 | #include <stdint.h> | ||
| 26 | |||
| 27 | #include "stdatomic.h" | ||
| 28 | |||
| 29 | static pthread_mutex_t atomic_lock = PTHREAD_MUTEX_INITIALIZER; | ||
| 30 | |||
| 31 | void avpriv_atomic_lock(void) | ||
| 32 | { | ||
| 33 | pthread_mutex_lock(&atomic_lock); | ||
| 34 | } | ||
| 35 | |||
| 36 | void avpriv_atomic_unlock(void) | ||
| 37 | { | ||
| 38 | pthread_mutex_unlock(&atomic_lock); | ||
| 39 | } | ||
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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 | ||
| 7 | * version 2.1 of the License, or (at your option) any later version. | ||
| 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 Rémi Denis-Courmont | ||
| 22 | */ | ||
| 23 | |||
| 24 | #ifndef FFMPEG_COMPAT_ATOMICS_PTHREAD_STDATOMIC_H | ||
| 25 | #define FFMPEG_COMPAT_ATOMICS_PTHREAD_STDATOMIC_H | ||
| 26 | |||
| 27 | #include <stdint.h> | ||
| 28 | |||
| 29 | #define ATOMIC_FLAG_INIT 0 | ||
| 30 | |||
| 31 | #define ATOMIC_VAR_INIT(value) (value) | ||
| 32 | |||
| 33 | #define atomic_init(obj, value) \ | ||
| 34 | do { \ | ||
| 35 | *(obj) = (value); \ | ||
| 36 | } while(0) | ||
| 37 | |||
| 38 | #define kill_dependency(y) ((void)0) | ||
| 39 | |||
| 40 | #define atomic_signal_fence(order) \ | ||
| 41 | ((void)0) | ||
| 42 | |||
| 43 | #define atomic_is_lock_free(obj) 0 | ||
| 44 | |||
| 45 | typedef intptr_t atomic_flag; | ||
| 46 | typedef intptr_t atomic_bool; | ||
| 47 | typedef intptr_t atomic_char; | ||
| 48 | typedef intptr_t atomic_schar; | ||
| 49 | typedef intptr_t atomic_uchar; | ||
| 50 | typedef intptr_t atomic_short; | ||
| 51 | typedef intptr_t atomic_ushort; | ||
| 52 | typedef intptr_t atomic_int; | ||
| 53 | typedef intptr_t atomic_uint; | ||
| 54 | typedef intptr_t atomic_long; | ||
| 55 | typedef intptr_t atomic_ulong; | ||
| 56 | typedef intptr_t atomic_llong; | ||
| 57 | typedef intptr_t atomic_ullong; | ||
| 58 | typedef intptr_t atomic_wchar_t; | ||
| 59 | typedef intptr_t atomic_int_least8_t; | ||
| 60 | typedef intptr_t atomic_uint_least8_t; | ||
| 61 | typedef intptr_t atomic_int_least16_t; | ||
| 62 | typedef intptr_t atomic_uint_least16_t; | ||
| 63 | typedef intptr_t atomic_int_least32_t; | ||
| 64 | typedef intptr_t atomic_uint_least32_t; | ||
| 65 | typedef intptr_t atomic_int_least64_t; | ||
| 66 | typedef intptr_t atomic_uint_least64_t; | ||
| 67 | typedef intptr_t atomic_int_fast8_t; | ||
| 68 | typedef intptr_t atomic_uint_fast8_t; | ||
| 69 | typedef intptr_t atomic_int_fast16_t; | ||
| 70 | typedef intptr_t atomic_uint_fast16_t; | ||
| 71 | typedef intptr_t atomic_int_fast32_t; | ||
| 72 | typedef intptr_t atomic_uint_fast32_t; | ||
| 73 | typedef intptr_t atomic_int_fast64_t; | ||
| 74 | typedef intptr_t atomic_uint_fast64_t; | ||
| 75 | typedef intptr_t atomic_intptr_t; | ||
| 76 | typedef intptr_t atomic_uintptr_t; | ||
| 77 | typedef intptr_t atomic_size_t; | ||
| 78 | typedef intptr_t atomic_ptrdiff_t; | ||
| 79 | typedef intptr_t atomic_intmax_t; | ||
| 80 | typedef intptr_t atomic_uintmax_t; | ||
| 81 | |||
| 82 | void avpriv_atomic_lock(void); | ||
| 83 | void avpriv_atomic_unlock(void); | ||
| 84 | |||
| 85 | static inline void atomic_thread_fence(int order) | ||
| 86 | { | ||
| 87 | avpriv_atomic_lock(); | ||
| 88 | avpriv_atomic_unlock(); | ||
| 89 | } | ||
| 90 | |||
| 91 | static inline void atomic_store(intptr_t *object, intptr_t desired) | ||
| 92 | { | ||
| 93 | avpriv_atomic_lock(); | ||
| 94 | *object = desired; | ||
| 95 | avpriv_atomic_unlock(); | ||
| 96 | } | ||
| 97 | |||
| 98 | #define atomic_store_explicit(object, desired, order) \ | ||
| 99 | atomic_store(object, desired) | ||
| 100 | |||
| 101 | static inline intptr_t atomic_load(intptr_t *object) | ||
| 102 | { | ||
| 103 | intptr_t ret; | ||
| 104 | avpriv_atomic_lock(); | ||
| 105 | ret = *object; | ||
| 106 | avpriv_atomic_unlock(); | ||
| 107 | return ret; | ||
| 108 | } | ||
| 109 | |||
| 110 | #define atomic_load_explicit(object, order) \ | ||
| 111 | atomic_load(object) | ||
| 112 | |||
| 113 | static inline intptr_t atomic_exchange(intptr_t *object, intptr_t desired) | ||
| 114 | { | ||
| 115 | intptr_t ret; | ||
| 116 | avpriv_atomic_lock(); | ||
| 117 | ret = *object; | ||
| 118 | *object = desired; | ||
| 119 | avpriv_atomic_unlock(); | ||
| 120 | return ret; | ||
| 121 | } | ||
| 122 | |||
| 123 | #define atomic_exchange_explicit(object, desired, order) \ | ||
| 124 | atomic_exchange(object, desired) | ||
| 125 | |||
| 126 | static inline int atomic_compare_exchange_strong(intptr_t *object, intptr_t *expected, | ||
| 127 | intptr_t desired) | ||
| 128 | { | ||
| 129 | int ret; | ||
| 130 | avpriv_atomic_lock(); | ||
| 131 | if (*object == *expected) { | ||
| 132 | ret = 1; | ||
| 133 | *object = desired; | ||
| 134 | } else { | ||
| 135 | ret = 0; | ||
| 136 | *expected = *object; | ||
| 137 | } | ||
| 138 | avpriv_atomic_unlock(); | ||
| 139 | return ret; | ||
| 140 | } | ||
| 141 | |||
| 142 | #define atomic_compare_exchange_strong_explicit(object, expected, desired, success, failure) \ | ||
| 143 | atomic_compare_exchange_strong(object, expected, desired) | ||
| 144 | |||
| 145 | #define atomic_compare_exchange_weak(object, expected, desired) \ | ||
| 146 | atomic_compare_exchange_strong(object, expected, desired) | ||
| 147 | |||
| 148 | #define atomic_compare_exchange_weak_explicit(object, expected, desired, success, failure) \ | ||
| 149 | atomic_compare_exchange_weak(object, expected, desired) | ||
| 150 | |||
| 151 | #define FETCH_MODIFY(opname, op) \ | ||
| 152 | static inline intptr_t atomic_fetch_ ## opname(intptr_t *object, intptr_t operand) \ | ||
| 153 | { \ | ||
| 154 | intptr_t ret; \ | ||
| 155 | avpriv_atomic_lock(); \ | ||
| 156 | ret = *object; \ | ||
| 157 | *object = *object op operand; \ | ||
| 158 | avpriv_atomic_unlock(); \ | ||
| 159 | return ret; \ | ||
| 160 | } | ||
| 161 | |||
| 162 | FETCH_MODIFY(add, +) | ||
| 163 | FETCH_MODIFY(sub, -) | ||
| 164 | FETCH_MODIFY(or, |) | ||
| 165 | FETCH_MODIFY(xor, ^) | ||
| 166 | FETCH_MODIFY(and, &) | ||
| 167 | |||
| 168 | #undef FETCH_MODIFY | ||
| 169 | |||
| 170 | #define atomic_fetch_add_explicit(object, operand, order) \ | ||
| 171 | atomic_fetch_add(object, operand) | ||
| 172 | |||
| 173 | #define atomic_fetch_sub_explicit(object, operand, order) \ | ||
| 174 | atomic_fetch_sub(object, operand) | ||
| 175 | |||
| 176 | #define atomic_fetch_or_explicit(object, operand, order) \ | ||
| 177 | atomic_fetch_or(object, operand) | ||
| 178 | |||
| 179 | #define atomic_fetch_xor_explicit(object, operand, order) \ | ||
| 180 | atomic_fetch_sub(object, operand) | ||
| 181 | |||
| 182 | #define atomic_fetch_and_explicit(object, operand, order) \ | ||
| 183 | atomic_fetch_and(object, operand) | ||
| 184 | |||
| 185 | #define atomic_flag_test_and_set(object) \ | ||
| 186 | atomic_exchange(object, 1) | ||
| 187 | |||
| 188 | #define atomic_flag_test_and_set_explicit(object, order) \ | ||
| 189 | atomic_flag_test_and_set(object) | ||
| 190 | |||
| 191 | #define atomic_flag_clear(object) \ | ||
| 192 | atomic_store(object, 0) | ||
| 193 | |||
| 194 | #define atomic_flag_clear_explicit(object, order) \ | ||
| 195 | atomic_flag_clear(object) | ||
| 196 | |||
| 197 | #endif /* FFMPEG_COMPAT_ATOMICS_PTHREAD_STDATOMIC_H */ | ||