Ben Cheng | 7823f2a | 2014-04-08 14:53:42 -0700 | [diff] [blame] | 1 | /* Copyright (C) 2013-2014 Free Software Foundation, Inc. |
| 2 | |
| 3 | This file is part of GCC. |
| 4 | |
| 5 | GCC is free software; you can redistribute it and/or modify |
| 6 | it under the terms of the GNU General Public License as published by |
| 7 | the Free Software Foundation; either version 3, or (at your option) |
| 8 | any later version. |
| 9 | |
| 10 | GCC is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | GNU General Public License for more details. |
| 14 | |
| 15 | Under Section 7 of GPL version 3, you are granted additional |
| 16 | permissions described in the GCC Runtime Library Exception, version |
| 17 | 3.1, as published by the Free Software Foundation. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License and |
| 20 | a copy of the GCC Runtime Library Exception along with this program; |
| 21 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
| 22 | <http://www.gnu.org/licenses/>. */ |
| 23 | |
| 24 | /* ISO C11 Standard: 7.17 Atomics <stdatomic.h>. */ |
| 25 | |
| 26 | #ifndef _STDATOMIC_H |
| 27 | #define _STDATOMIC_H |
| 28 | |
| 29 | typedef enum |
| 30 | { |
| 31 | memory_order_relaxed = __ATOMIC_RELAXED, |
| 32 | memory_order_consume = __ATOMIC_CONSUME, |
| 33 | memory_order_acquire = __ATOMIC_ACQUIRE, |
| 34 | memory_order_release = __ATOMIC_RELEASE, |
| 35 | memory_order_acq_rel = __ATOMIC_ACQ_REL, |
| 36 | memory_order_seq_cst = __ATOMIC_SEQ_CST |
| 37 | } memory_order; |
| 38 | |
| 39 | |
| 40 | typedef _Atomic _Bool atomic_bool; |
| 41 | typedef _Atomic char atomic_char; |
| 42 | typedef _Atomic signed char atomic_schar; |
| 43 | typedef _Atomic unsigned char atomic_uchar; |
| 44 | typedef _Atomic short atomic_short; |
| 45 | typedef _Atomic unsigned short atomic_ushort; |
| 46 | typedef _Atomic int atomic_int; |
| 47 | typedef _Atomic unsigned int atomic_uint; |
| 48 | typedef _Atomic long atomic_long; |
| 49 | typedef _Atomic unsigned long atomic_ulong; |
| 50 | typedef _Atomic long long atomic_llong; |
| 51 | typedef _Atomic unsigned long long atomic_ullong; |
| 52 | typedef _Atomic __CHAR16_TYPE__ atomic_char16_t; |
| 53 | typedef _Atomic __CHAR32_TYPE__ atomic_char32_t; |
| 54 | typedef _Atomic __WCHAR_TYPE__ atomic_wchar_t; |
| 55 | typedef _Atomic __INT_LEAST8_TYPE__ atomic_int_least8_t; |
| 56 | typedef _Atomic __UINT_LEAST8_TYPE__ atomic_uint_least8_t; |
| 57 | typedef _Atomic __INT_LEAST16_TYPE__ atomic_int_least16_t; |
| 58 | typedef _Atomic __UINT_LEAST16_TYPE__ atomic_uint_least16_t; |
| 59 | typedef _Atomic __INT_LEAST32_TYPE__ atomic_int_least32_t; |
| 60 | typedef _Atomic __UINT_LEAST32_TYPE__ atomic_uint_least32_t; |
| 61 | typedef _Atomic __INT_LEAST64_TYPE__ atomic_int_least64_t; |
| 62 | typedef _Atomic __UINT_LEAST64_TYPE__ atomic_uint_least64_t; |
| 63 | typedef _Atomic __INT_FAST8_TYPE__ atomic_int_fast8_t; |
| 64 | typedef _Atomic __UINT_FAST8_TYPE__ atomic_uint_fast8_t; |
| 65 | typedef _Atomic __INT_FAST16_TYPE__ atomic_int_fast16_t; |
| 66 | typedef _Atomic __UINT_FAST16_TYPE__ atomic_uint_fast16_t; |
| 67 | typedef _Atomic __INT_FAST32_TYPE__ atomic_int_fast32_t; |
| 68 | typedef _Atomic __UINT_FAST32_TYPE__ atomic_uint_fast32_t; |
| 69 | typedef _Atomic __INT_FAST64_TYPE__ atomic_int_fast64_t; |
| 70 | typedef _Atomic __UINT_FAST64_TYPE__ atomic_uint_fast64_t; |
| 71 | typedef _Atomic __INTPTR_TYPE__ atomic_intptr_t; |
| 72 | typedef _Atomic __UINTPTR_TYPE__ atomic_uintptr_t; |
| 73 | typedef _Atomic __SIZE_TYPE__ atomic_size_t; |
| 74 | typedef _Atomic __PTRDIFF_TYPE__ atomic_ptrdiff_t; |
| 75 | typedef _Atomic __INTMAX_TYPE__ atomic_intmax_t; |
| 76 | typedef _Atomic __UINTMAX_TYPE__ atomic_uintmax_t; |
| 77 | |
| 78 | |
| 79 | #define ATOMIC_VAR_INIT(VALUE) (VALUE) |
| 80 | #define atomic_init(PTR, VAL) \ |
| 81 | do \ |
| 82 | { \ |
| 83 | *(PTR) = (VAL); \ |
| 84 | } \ |
| 85 | while (0) |
| 86 | |
| 87 | #define kill_dependency(Y) \ |
| 88 | __extension__ \ |
| 89 | ({ \ |
| 90 | __auto_type __kill_dependency_tmp = (Y); \ |
| 91 | __kill_dependency_tmp; \ |
| 92 | }) |
| 93 | |
| 94 | #define atomic_thread_fence(MO) __atomic_thread_fence (MO) |
| 95 | #define atomic_signal_fence(MO) __atomic_signal_fence (MO) |
| 96 | #define atomic_is_lock_free(OBJ) __atomic_is_lock_free (sizeof (*(OBJ)), (OBJ)) |
| 97 | |
| 98 | #define __atomic_type_lock_free(T) \ |
| 99 | (__atomic_always_lock_free (sizeof (T), (void *) 0) \ |
| 100 | ? 2 \ |
| 101 | : (__atomic_is_lock_free (sizeof (T), (void *) 0) ? 1 : 0)) |
| 102 | #define ATOMIC_BOOL_LOCK_FREE \ |
| 103 | __atomic_type_lock_free (atomic_bool) |
| 104 | #define ATOMIC_CHAR_LOCK_FREE \ |
| 105 | __atomic_type_lock_free (atomic_char) |
| 106 | #define ATOMIC_CHAR16_T_LOCK_FREE \ |
| 107 | __atomic_type_lock_free (atomic_char16_t) |
| 108 | #define ATOMIC_CHAR32_T_LOCK_FREE \ |
| 109 | __atomic_type_lock_free (atomic_char32_t) |
| 110 | #define ATOMIC_WCHAR_T_LOCK_FREE \ |
| 111 | __atomic_type_lock_free (atomic_wchar_t) |
| 112 | #define ATOMIC_SHORT_LOCK_FREE \ |
| 113 | __atomic_type_lock_free (atomic_short) |
| 114 | #define ATOMIC_INT_LOCK_FREE \ |
| 115 | __atomic_type_lock_free (atomic_int) |
| 116 | #define ATOMIC_LONG_LOCK_FREE \ |
| 117 | __atomic_type_lock_free (atomic_long) |
| 118 | #define ATOMIC_LLONG_LOCK_FREE \ |
| 119 | __atomic_type_lock_free (atomic_llong) |
| 120 | #define ATOMIC_POINTER_LOCK_FREE \ |
| 121 | __atomic_type_lock_free (void * _Atomic) |
| 122 | |
| 123 | |
| 124 | /* Note that these macros require __typeof__ and __auto_type to remove |
| 125 | _Atomic qualifiers (and const qualifiers, if those are valid on |
| 126 | macro operands). |
| 127 | |
| 128 | Also note that the header file uses the generic form of __atomic |
| 129 | builtins, which requires the address to be taken of the value |
| 130 | parameter, and then we pass that value on. This allows the macros |
| 131 | to work for any type, and the compiler is smart enough to convert |
| 132 | these to lock-free _N variants if possible, and throw away the |
| 133 | temps. */ |
| 134 | |
| 135 | #define atomic_store_explicit(PTR, VAL, MO) \ |
| 136 | __extension__ \ |
| 137 | ({ \ |
| 138 | __auto_type __atomic_store_ptr = (PTR); \ |
| 139 | __typeof__ (*__atomic_store_ptr) __atomic_store_tmp = (VAL); \ |
| 140 | __atomic_store (__atomic_store_ptr, &__atomic_store_tmp, (MO)); \ |
| 141 | }) |
| 142 | |
| 143 | #define atomic_store(PTR, VAL) \ |
| 144 | atomic_store_explicit (PTR, VAL, __ATOMIC_SEQ_CST) |
| 145 | |
| 146 | |
| 147 | #define atomic_load_explicit(PTR, MO) \ |
| 148 | __extension__ \ |
| 149 | ({ \ |
| 150 | __auto_type __atomic_load_ptr = (PTR); \ |
| 151 | __typeof__ (*__atomic_load_ptr) __atomic_load_tmp; \ |
| 152 | __atomic_load (__atomic_load_ptr, &__atomic_load_tmp, (MO)); \ |
| 153 | __atomic_load_tmp; \ |
| 154 | }) |
| 155 | |
| 156 | #define atomic_load(PTR) atomic_load_explicit (PTR, __ATOMIC_SEQ_CST) |
| 157 | |
| 158 | |
| 159 | #define atomic_exchange_explicit(PTR, VAL, MO) \ |
| 160 | __extension__ \ |
| 161 | ({ \ |
| 162 | __auto_type __atomic_exchange_ptr = (PTR); \ |
| 163 | __typeof__ (*__atomic_exchange_ptr) __atomic_exchange_val = (VAL); \ |
| 164 | __typeof__ (*__atomic_exchange_ptr) __atomic_exchange_tmp; \ |
| 165 | __atomic_exchange (__atomic_exchange_ptr, &__atomic_exchange_val, \ |
| 166 | &__atomic_exchange_tmp, (MO)); \ |
| 167 | __atomic_exchange_tmp; \ |
| 168 | }) |
| 169 | |
| 170 | #define atomic_exchange(PTR, VAL) \ |
| 171 | atomic_exchange_explicit (PTR, VAL, __ATOMIC_SEQ_CST) |
| 172 | |
| 173 | |
| 174 | #define atomic_compare_exchange_strong_explicit(PTR, VAL, DES, SUC, FAIL) \ |
| 175 | __extension__ \ |
| 176 | ({ \ |
| 177 | __auto_type __atomic_compare_exchange_ptr = (PTR); \ |
| 178 | __typeof__ (*__atomic_compare_exchange_ptr) __atomic_compare_exchange_tmp \ |
| 179 | = (DES); \ |
| 180 | __atomic_compare_exchange (__atomic_compare_exchange_ptr, (VAL), \ |
| 181 | &__atomic_compare_exchange_tmp, 0, \ |
| 182 | (SUC), (FAIL)); \ |
| 183 | }) |
| 184 | |
| 185 | #define atomic_compare_exchange_strong(PTR, VAL, DES) \ |
| 186 | atomic_compare_exchange_strong_explicit (PTR, VAL, DES, __ATOMIC_SEQ_CST, \ |
| 187 | __ATOMIC_SEQ_CST) |
| 188 | |
| 189 | #define atomic_compare_exchange_weak_explicit(PTR, VAL, DES, SUC, FAIL) \ |
| 190 | __extension__ \ |
| 191 | ({ \ |
| 192 | __auto_type __atomic_compare_exchange_ptr = (PTR); \ |
| 193 | __typeof__ (*__atomic_compare_exchange_ptr) __atomic_compare_exchange_tmp \ |
| 194 | = (DES); \ |
| 195 | __atomic_compare_exchange (__atomic_compare_exchange_ptr, (VAL), \ |
| 196 | &__atomic_compare_exchange_tmp, 1, \ |
| 197 | (SUC), (FAIL)); \ |
| 198 | }) |
| 199 | |
| 200 | #define atomic_compare_exchange_weak(PTR, VAL, DES) \ |
| 201 | atomic_compare_exchange_weak_explicit (PTR, VAL, DES, __ATOMIC_SEQ_CST, \ |
| 202 | __ATOMIC_SEQ_CST) |
| 203 | |
| 204 | |
| 205 | |
| 206 | #define atomic_fetch_add(PTR, VAL) __atomic_fetch_add ((PTR), (VAL), \ |
| 207 | __ATOMIC_SEQ_CST) |
| 208 | #define atomic_fetch_add_explicit(PTR, VAL, MO) \ |
| 209 | __atomic_fetch_add ((PTR), (VAL), (MO)) |
| 210 | |
| 211 | #define atomic_fetch_sub(PTR, VAL) __atomic_fetch_sub ((PTR), (VAL), \ |
| 212 | __ATOMIC_SEQ_CST) |
| 213 | #define atomic_fetch_sub_explicit(PTR, VAL, MO) \ |
| 214 | __atomic_fetch_sub ((PTR), (VAL), (MO)) |
| 215 | |
| 216 | #define atomic_fetch_or(PTR, VAL) __atomic_fetch_or ((PTR), (VAL), \ |
| 217 | __ATOMIC_SEQ_CST) |
| 218 | #define atomic_fetch_or_explicit(PTR, VAL, MO) \ |
| 219 | __atomic_fetch_or ((PTR), (VAL), (MO)) |
| 220 | |
| 221 | #define atomic_fetch_xor(PTR, VAL) __atomic_fetch_xor ((PTR), (VAL), \ |
| 222 | __ATOMIC_SEQ_CST) |
| 223 | #define atomic_fetch_xor_explicit(PTR, VAL, MO) \ |
| 224 | __atomic_fetch_xor ((PTR), (VAL), (MO)) |
| 225 | |
| 226 | #define atomic_fetch_and(PTR, VAL) __atomic_fetch_and ((PTR), (VAL), \ |
| 227 | __ATOMIC_SEQ_CST) |
| 228 | #define atomic_fetch_and_explicit(PTR, VAL, MO) \ |
| 229 | __atomic_fetch_and ((PTR), (VAL), (MO)) |
| 230 | |
| 231 | |
| 232 | typedef _Atomic struct |
| 233 | { |
| 234 | #if __GCC_ATOMIC_TEST_AND_SET_TRUEVAL == 1 |
| 235 | _Bool __val; |
| 236 | #else |
| 237 | unsigned char __val; |
| 238 | #endif |
| 239 | } atomic_flag; |
| 240 | |
| 241 | #define ATOMIC_FLAG_INIT { 0 } |
| 242 | |
| 243 | |
| 244 | #define atomic_flag_test_and_set(PTR) \ |
| 245 | __atomic_test_and_set ((PTR), __ATOMIC_SEQ_CST) |
| 246 | #define atomic_flag_test_and_set_explicit(PTR, MO) \ |
| 247 | __atomic_test_and_set ((PTR), (MO)) |
| 248 | |
| 249 | #define atomic_flag_clear(PTR) __atomic_clear ((PTR), __ATOMIC_SEQ_CST) |
| 250 | #define atomic_flag_clear_explicit(PTR, MO) __atomic_clear ((PTR), (MO)) |
| 251 | |
| 252 | #endif /* _STDATOMIC_H */ |