1 // -*- C++ -*- 2 //===--------------------------- atomic -----------------------------------===// 3 // 4 // The LLVM Compiler Infrastructure 5 // 6 // This file is distributed under the University of Illinois Open Source 7 // License. See LICENSE.TXT for details. 8 // 9 //===----------------------------------------------------------------------===// 10 11 #ifndef _LIBCPP_ATOMIC 12 #define _LIBCPP_ATOMIC 13 14 /* 15 atomic synopsis 16 17 namespace std 18 { 19 20 // order and consistency 21 22 typedef enum memory_order 23 { 24 memory_order_relaxed, 25 memory_order_consume, // load-consume 26 memory_order_acquire, // load-acquire 27 memory_order_release, // store-release 28 memory_order_acq_rel, // store-release load-acquire 29 memory_order_seq_cst // store-release load-acquire 30 } memory_order; 31 32 template <class T> T kill_dependency(T y) noexcept; 33 34 // lock-free property 35 36 #define ATOMIC_BOOL_LOCK_FREE unspecified 37 #define ATOMIC_CHAR_LOCK_FREE unspecified 38 #define ATOMIC_CHAR16_T_LOCK_FREE unspecified 39 #define ATOMIC_CHAR32_T_LOCK_FREE unspecified 40 #define ATOMIC_WCHAR_T_LOCK_FREE unspecified 41 #define ATOMIC_SHORT_LOCK_FREE unspecified 42 #define ATOMIC_INT_LOCK_FREE unspecified 43 #define ATOMIC_LONG_LOCK_FREE unspecified 44 #define ATOMIC_LLONG_LOCK_FREE unspecified 45 #define ATOMIC_POINTER_LOCK_FREE unspecified 46 47 // flag type and operations 48 49 typedef struct atomic_flag 50 { 51 bool test_and_set(memory_order m = memory_order_seq_cst) volatile noexcept; 52 bool test_and_set(memory_order m = memory_order_seq_cst) noexcept; 53 void clear(memory_order m = memory_order_seq_cst) volatile noexcept; 54 void clear(memory_order m = memory_order_seq_cst) noexcept; 55 atomic_flag() noexcept = default; 56 atomic_flag(const atomic_flag&) = delete; 57 atomic_flag& operator=(const atomic_flag&) = delete; 58 atomic_flag& operator=(const atomic_flag&) volatile = delete; 59 } atomic_flag; 60 61 bool 62 atomic_flag_test_and_set(volatile atomic_flag* obj) noexcept; 63 64 bool 65 atomic_flag_test_and_set(atomic_flag* obj) noexcept; 66 67 bool 68 atomic_flag_test_and_set_explicit(volatile atomic_flag* obj, 69 memory_order m) noexcept; 70 71 bool 72 atomic_flag_test_and_set_explicit(atomic_flag* obj, memory_order m) noexcept; 73 74 void 75 atomic_flag_clear(volatile atomic_flag* obj) noexcept; 76 77 void 78 atomic_flag_clear(atomic_flag* obj) noexcept; 79 80 void 81 atomic_flag_clear_explicit(volatile atomic_flag* obj, memory_order m) noexcept; 82 83 void 84 atomic_flag_clear_explicit(atomic_flag* obj, memory_order m) noexcept; 85 86 #define ATOMIC_FLAG_INIT see below 87 #define ATOMIC_VAR_INIT(value) see below 88 89 template <class T> 90 struct atomic 91 { 92 bool is_lock_free() const volatile noexcept; 93 bool is_lock_free() const noexcept; 94 void store(T desr, memory_order m = memory_order_seq_cst) volatile noexcept; 95 void store(T desr, memory_order m = memory_order_seq_cst) noexcept; 96 T load(memory_order m = memory_order_seq_cst) const volatile noexcept; 97 T load(memory_order m = memory_order_seq_cst) const noexcept; 98 operator T() const volatile noexcept; 99 operator T() const noexcept; 100 T exchange(T desr, memory_order m = memory_order_seq_cst) volatile noexcept; 101 T exchange(T desr, memory_order m = memory_order_seq_cst) noexcept; 102 bool compare_exchange_weak(T& expc, T desr, 103 memory_order s, memory_order f) volatile noexcept; 104 bool compare_exchange_weak(T& expc, T desr, memory_order s, memory_order f) noexcept; 105 bool compare_exchange_strong(T& expc, T desr, 106 memory_order s, memory_order f) volatile noexcept; 107 bool compare_exchange_strong(T& expc, T desr, 108 memory_order s, memory_order f) noexcept; 109 bool compare_exchange_weak(T& expc, T desr, 110 memory_order m = memory_order_seq_cst) volatile noexcept; 111 bool compare_exchange_weak(T& expc, T desr, 112 memory_order m = memory_order_seq_cst) noexcept; 113 bool compare_exchange_strong(T& expc, T desr, 114 memory_order m = memory_order_seq_cst) volatile noexcept; 115 bool compare_exchange_strong(T& expc, T desr, 116 memory_order m = memory_order_seq_cst) noexcept; 117 118 atomic() noexcept = default; 119 constexpr atomic(T desr) noexcept; 120 atomic(const atomic&) = delete; 121 atomic& operator=(const atomic&) = delete; 122 atomic& operator=(const atomic&) volatile = delete; 123 T operator=(T) volatile noexcept; 124 T operator=(T) noexcept; 125 }; 126 127 template <> 128 struct atomic<integral> 129 { 130 bool is_lock_free() const volatile noexcept; 131 bool is_lock_free() const noexcept; 132 void store(integral desr, memory_order m = memory_order_seq_cst) volatile noexcept; 133 void store(integral desr, memory_order m = memory_order_seq_cst) noexcept; 134 integral load(memory_order m = memory_order_seq_cst) const volatile noexcept; 135 integral load(memory_order m = memory_order_seq_cst) const noexcept; 136 operator integral() const volatile noexcept; 137 operator integral() const noexcept; 138 integral exchange(integral desr, 139 memory_order m = memory_order_seq_cst) volatile noexcept; 140 integral exchange(integral desr, memory_order m = memory_order_seq_cst) noexcept; 141 bool compare_exchange_weak(integral& expc, integral desr, 142 memory_order s, memory_order f) volatile noexcept; 143 bool compare_exchange_weak(integral& expc, integral desr, 144 memory_order s, memory_order f) noexcept; 145 bool compare_exchange_strong(integral& expc, integral desr, 146 memory_order s, memory_order f) volatile noexcept; 147 bool compare_exchange_strong(integral& expc, integral desr, 148 memory_order s, memory_order f) noexcept; 149 bool compare_exchange_weak(integral& expc, integral desr, 150 memory_order m = memory_order_seq_cst) volatile noexcept; 151 bool compare_exchange_weak(integral& expc, integral desr, 152 memory_order m = memory_order_seq_cst) noexcept; 153 bool compare_exchange_strong(integral& expc, integral desr, 154 memory_order m = memory_order_seq_cst) volatile noexcept; 155 bool compare_exchange_strong(integral& expc, integral desr, 156 memory_order m = memory_order_seq_cst) noexcept; 157 158 integral 159 fetch_add(integral op, memory_order m = memory_order_seq_cst) volatile noexcept; 160 integral fetch_add(integral op, memory_order m = memory_order_seq_cst) noexcept; 161 integral 162 fetch_sub(integral op, memory_order m = memory_order_seq_cst) volatile noexcept; 163 integral fetch_sub(integral op, memory_order m = memory_order_seq_cst) noexcept; 164 integral 165 fetch_and(integral op, memory_order m = memory_order_seq_cst) volatile noexcept; 166 integral fetch_and(integral op, memory_order m = memory_order_seq_cst) noexcept; 167 integral 168 fetch_or(integral op, memory_order m = memory_order_seq_cst) volatile noexcept; 169 integral fetch_or(integral op, memory_order m = memory_order_seq_cst) noexcept; 170 integral 171 fetch_xor(integral op, memory_order m = memory_order_seq_cst) volatile noexcept; 172 integral fetch_xor(integral op, memory_order m = memory_order_seq_cst) noexcept; 173 174 atomic() noexcept = default; 175 constexpr atomic(integral desr) noexcept; 176 atomic(const atomic&) = delete; 177 atomic& operator=(const atomic&) = delete; 178 atomic& operator=(const atomic&) volatile = delete; 179 integral operator=(integral desr) volatile noexcept; 180 integral operator=(integral desr) noexcept; 181 182 integral operator++(int) volatile noexcept; 183 integral operator++(int) noexcept; 184 integral operator--(int) volatile noexcept; 185 integral operator--(int) noexcept; 186 integral operator++() volatile noexcept; 187 integral operator++() noexcept; 188 integral operator--() volatile noexcept; 189 integral operator--() noexcept; 190 integral operator+=(integral op) volatile noexcept; 191 integral operator+=(integral op) noexcept; 192 integral operator-=(integral op) volatile noexcept; 193 integral operator-=(integral op) noexcept; 194 integral operator&=(integral op) volatile noexcept; 195 integral operator&=(integral op) noexcept; 196 integral operator|=(integral op) volatile noexcept; 197 integral operator|=(integral op) noexcept; 198 integral operator^=(integral op) volatile noexcept; 199 integral operator^=(integral op) noexcept; 200 }; 201 202 template <class T> 203 struct atomic<T*> 204 { 205 bool is_lock_free() const volatile noexcept; 206 bool is_lock_free() const noexcept; 207 void store(T* desr, memory_order m = memory_order_seq_cst) volatile noexcept; 208 void store(T* desr, memory_order m = memory_order_seq_cst) noexcept; 209 T* load(memory_order m = memory_order_seq_cst) const volatile noexcept; 210 T* load(memory_order m = memory_order_seq_cst) const noexcept; 211 operator T*() const volatile noexcept; 212 operator T*() const noexcept; 213 T* exchange(T* desr, memory_order m = memory_order_seq_cst) volatile noexcept; 214 T* exchange(T* desr, memory_order m = memory_order_seq_cst) noexcept; 215 bool compare_exchange_weak(T*& expc, T* desr, 216 memory_order s, memory_order f) volatile noexcept; 217 bool compare_exchange_weak(T*& expc, T* desr, 218 memory_order s, memory_order f) noexcept; 219 bool compare_exchange_strong(T*& expc, T* desr, 220 memory_order s, memory_order f) volatile noexcept; 221 bool compare_exchange_strong(T*& expc, T* desr, 222 memory_order s, memory_order f) noexcept; 223 bool compare_exchange_weak(T*& expc, T* desr, 224 memory_order m = memory_order_seq_cst) volatile noexcept; 225 bool compare_exchange_weak(T*& expc, T* desr, 226 memory_order m = memory_order_seq_cst) noexcept; 227 bool compare_exchange_strong(T*& expc, T* desr, 228 memory_order m = memory_order_seq_cst) volatile noexcept; 229 bool compare_exchange_strong(T*& expc, T* desr, 230 memory_order m = memory_order_seq_cst) noexcept; 231 T* fetch_add(ptrdiff_t op, memory_order m = memory_order_seq_cst) volatile noexcept; 232 T* fetch_add(ptrdiff_t op, memory_order m = memory_order_seq_cst) noexcept; 233 T* fetch_sub(ptrdiff_t op, memory_order m = memory_order_seq_cst) volatile noexcept; 234 T* fetch_sub(ptrdiff_t op, memory_order m = memory_order_seq_cst) noexcept; 235 236 atomic() noexcept = default; 237 constexpr atomic(T* desr) noexcept; 238 atomic(const atomic&) = delete; 239 atomic& operator=(const atomic&) = delete; 240 atomic& operator=(const atomic&) volatile = delete; 241 242 T* operator=(T*) volatile noexcept; 243 T* operator=(T*) noexcept; 244 T* operator++(int) volatile noexcept; 245 T* operator++(int) noexcept; 246 T* operator--(int) volatile noexcept; 247 T* operator--(int) noexcept; 248 T* operator++() volatile noexcept; 249 T* operator++() noexcept; 250 T* operator--() volatile noexcept; 251 T* operator--() noexcept; 252 T* operator+=(ptrdiff_t op) volatile noexcept; 253 T* operator+=(ptrdiff_t op) noexcept; 254 T* operator-=(ptrdiff_t op) volatile noexcept; 255 T* operator-=(ptrdiff_t op) noexcept; 256 }; 257 258 259 template <class T> 260 bool 261 atomic_is_lock_free(const volatile atomic<T>* obj) noexcept; 262 263 template <class T> 264 bool 265 atomic_is_lock_free(const atomic<T>* obj) noexcept; 266 267 template <class T> 268 void 269 atomic_init(volatile atomic<T>* obj, T desr) noexcept; 270 271 template <class T> 272 void 273 atomic_init(atomic<T>* obj, T desr) noexcept; 274 275 template <class T> 276 void 277 atomic_store(volatile atomic<T>* obj, T desr) noexcept; 278 279 template <class T> 280 void 281 atomic_store(atomic<T>* obj, T desr) noexcept; 282 283 template <class T> 284 void 285 atomic_store_explicit(volatile atomic<T>* obj, T desr, memory_order m) noexcept; 286 287 template <class T> 288 void 289 atomic_store_explicit(atomic<T>* obj, T desr, memory_order m) noexcept; 290 291 template <class T> 292 T 293 atomic_load(const volatile atomic<T>* obj) noexcept; 294 295 template <class T> 296 T 297 atomic_load(const atomic<T>* obj) noexcept; 298 299 template <class T> 300 T 301 atomic_load_explicit(const volatile atomic<T>* obj, memory_order m) noexcept; 302 303 template <class T> 304 T 305 atomic_load_explicit(const atomic<T>* obj, memory_order m) noexcept; 306 307 template <class T> 308 T 309 atomic_exchange(volatile atomic<T>* obj, T desr) noexcept; 310 311 template <class T> 312 T 313 atomic_exchange(atomic<T>* obj, T desr) noexcept; 314 315 template <class T> 316 T 317 atomic_exchange_explicit(volatile atomic<T>* obj, T desr, memory_order m) noexcept; 318 319 template <class T> 320 T 321 atomic_exchange_explicit(atomic<T>* obj, T desr, memory_order m) noexcept; 322 323 template <class T> 324 bool 325 atomic_compare_exchange_weak(volatile atomic<T>* obj, T* expc, T desr) noexcept; 326 327 template <class T> 328 bool 329 atomic_compare_exchange_weak(atomic<T>* obj, T* expc, T desr) noexcept; 330 331 template <class T> 332 bool 333 atomic_compare_exchange_strong(volatile atomic<T>* obj, T* expc, T desr) noexcept; 334 335 template <class T> 336 bool 337 atomic_compare_exchange_strong(atomic<T>* obj, T* expc, T desr) noexcept; 338 339 template <class T> 340 bool 341 atomic_compare_exchange_weak_explicit(volatile atomic<T>* obj, T* expc, 342 T desr, 343 memory_order s, memory_order f) noexcept; 344 345 template <class T> 346 bool 347 atomic_compare_exchange_weak_explicit(atomic<T>* obj, T* expc, T desr, 348 memory_order s, memory_order f) noexcept; 349 350 template <class T> 351 bool 352 atomic_compare_exchange_strong_explicit(volatile atomic<T>* obj, 353 T* expc, T desr, 354 memory_order s, memory_order f) noexcept; 355 356 template <class T> 357 bool 358 atomic_compare_exchange_strong_explicit(atomic<T>* obj, T* expc, 359 T desr, 360 memory_order s, memory_order f) noexcept; 361 362 template <class Integral> 363 Integral 364 atomic_fetch_add(volatile atomic<Integral>* obj, Integral op) noexcept; 365 366 template <class Integral> 367 Integral 368 atomic_fetch_add(atomic<Integral>* obj, Integral op) noexcept; 369 370 template <class Integral> 371 Integral 372 atomic_fetch_add_explicit(volatile atomic<Integral>* obj, Integral op, 373 memory_order m) noexcept; 374 template <class Integral> 375 Integral 376 atomic_fetch_add_explicit(atomic<Integral>* obj, Integral op, 377 memory_order m) noexcept; 378 template <class Integral> 379 Integral 380 atomic_fetch_sub(volatile atomic<Integral>* obj, Integral op) noexcept; 381 382 template <class Integral> 383 Integral 384 atomic_fetch_sub(atomic<Integral>* obj, Integral op) noexcept; 385 386 template <class Integral> 387 Integral 388 atomic_fetch_sub_explicit(volatile atomic<Integral>* obj, Integral op, 389 memory_order m) noexcept; 390 template <class Integral> 391 Integral 392 atomic_fetch_sub_explicit(atomic<Integral>* obj, Integral op, 393 memory_order m) noexcept; 394 template <class Integral> 395 Integral 396 atomic_fetch_and(volatile atomic<Integral>* obj, Integral op) noexcept; 397 398 template <class Integral> 399 Integral 400 atomic_fetch_and(atomic<Integral>* obj, Integral op) noexcept; 401 402 template <class Integral> 403 Integral 404 atomic_fetch_and_explicit(volatile atomic<Integral>* obj, Integral op, 405 memory_order m) noexcept; 406 template <class Integral> 407 Integral 408 atomic_fetch_and_explicit(atomic<Integral>* obj, Integral op, 409 memory_order m) noexcept; 410 template <class Integral> 411 Integral 412 atomic_fetch_or(volatile atomic<Integral>* obj, Integral op) noexcept; 413 414 template <class Integral> 415 Integral 416 atomic_fetch_or(atomic<Integral>* obj, Integral op) noexcept; 417 418 template <class Integral> 419 Integral 420 atomic_fetch_or_explicit(volatile atomic<Integral>* obj, Integral op, 421 memory_order m) noexcept; 422 template <class Integral> 423 Integral 424 atomic_fetch_or_explicit(atomic<Integral>* obj, Integral op, 425 memory_order m) noexcept; 426 template <class Integral> 427 Integral 428 atomic_fetch_xor(volatile atomic<Integral>* obj, Integral op) noexcept; 429 430 template <class Integral> 431 Integral 432 atomic_fetch_xor(atomic<Integral>* obj, Integral op) noexcept; 433 434 template <class Integral> 435 Integral 436 atomic_fetch_xor_explicit(volatile atomic<Integral>* obj, Integral op, 437 memory_order m) noexcept; 438 template <class Integral> 439 Integral 440 atomic_fetch_xor_explicit(atomic<Integral>* obj, Integral op, 441 memory_order m) noexcept; 442 443 template <class T> 444 T* 445 atomic_fetch_add(volatile atomic<T*>* obj, ptrdiff_t op) noexcept; 446 447 template <class T> 448 T* 449 atomic_fetch_add(atomic<T*>* obj, ptrdiff_t op) noexcept; 450 451 template <class T> 452 T* 453 atomic_fetch_add_explicit(volatile atomic<T*>* obj, ptrdiff_t op, 454 memory_order m) noexcept; 455 template <class T> 456 T* 457 atomic_fetch_add_explicit(atomic<T*>* obj, ptrdiff_t op, memory_order m) noexcept; 458 459 template <class T> 460 T* 461 atomic_fetch_sub(volatile atomic<T*>* obj, ptrdiff_t op) noexcept; 462 463 template <class T> 464 T* 465 atomic_fetch_sub(atomic<T*>* obj, ptrdiff_t op) noexcept; 466 467 template <class T> 468 T* 469 atomic_fetch_sub_explicit(volatile atomic<T*>* obj, ptrdiff_t op, 470 memory_order m) noexcept; 471 template <class T> 472 T* 473 atomic_fetch_sub_explicit(atomic<T*>* obj, ptrdiff_t op, memory_order m) noexcept; 474 475 // Atomics for standard typedef types 476 477 typedef atomic<bool> atomic_bool; 478 typedef atomic<char> atomic_char; 479 typedef atomic<signed char> atomic_schar; 480 typedef atomic<unsigned char> atomic_uchar; 481 typedef atomic<short> atomic_short; 482 typedef atomic<unsigned short> atomic_ushort; 483 typedef atomic<int> atomic_int; 484 typedef atomic<unsigned int> atomic_uint; 485 typedef atomic<long> atomic_long; 486 typedef atomic<unsigned long> atomic_ulong; 487 typedef atomic<long long> atomic_llong; 488 typedef atomic<unsigned long long> atomic_ullong; 489 typedef atomic<char16_t> atomic_char16_t; 490 typedef atomic<char32_t> atomic_char32_t; 491 typedef atomic<wchar_t> atomic_wchar_t; 492 493 typedef atomic<int_least8_t> atomic_int_least8_t; 494 typedef atomic<uint_least8_t> atomic_uint_least8_t; 495 typedef atomic<int_least16_t> atomic_int_least16_t; 496 typedef atomic<uint_least16_t> atomic_uint_least16_t; 497 typedef atomic<int_least32_t> atomic_int_least32_t; 498 typedef atomic<uint_least32_t> atomic_uint_least32_t; 499 typedef atomic<int_least64_t> atomic_int_least64_t; 500 typedef atomic<uint_least64_t> atomic_uint_least64_t; 501 502 typedef atomic<int_fast8_t> atomic_int_fast8_t; 503 typedef atomic<uint_fast8_t> atomic_uint_fast8_t; 504 typedef atomic<int_fast16_t> atomic_int_fast16_t; 505 typedef atomic<uint_fast16_t> atomic_uint_fast16_t; 506 typedef atomic<int_fast32_t> atomic_int_fast32_t; 507 typedef atomic<uint_fast32_t> atomic_uint_fast32_t; 508 typedef atomic<int_fast64_t> atomic_int_fast64_t; 509 typedef atomic<uint_fast64_t> atomic_uint_fast64_t; 510 511 typedef atomic<intptr_t> atomic_intptr_t; 512 typedef atomic<uintptr_t> atomic_uintptr_t; 513 typedef atomic<size_t> atomic_size_t; 514 typedef atomic<ptrdiff_t> atomic_ptrdiff_t; 515 typedef atomic<intmax_t> atomic_intmax_t; 516 typedef atomic<uintmax_t> atomic_uintmax_t; 517 518 // fences 519 520 void atomic_thread_fence(memory_order m) noexcept; 521 void atomic_signal_fence(memory_order m) noexcept; 522 523 } // std 524 525 */ 526 527 #include <__config> 528 #include <cstddef> 529 #include <cstdint> 530 #include <type_traits> 531 532 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 533 #pragma GCC system_header 534 #endif 535 536 _LIBCPP_BEGIN_NAMESPACE_STD 537 538 #if !__has_feature(cxx_atomic) && _GNUC_VER < 407 539 #error <atomic> is not implemented 540 #else 541 542 typedef enum memory_order 543 { 544 memory_order_relaxed, memory_order_consume, memory_order_acquire, 545 memory_order_release, memory_order_acq_rel, memory_order_seq_cst 546 } memory_order; 547 548 #if _GNUC_VER >= 407 549 namespace __gcc_atomic { 550 template <typename T> 551 struct __gcc_atomic_t { 552 __gcc_atomic_t() _NOEXCEPT {} 553 explicit __gcc_atomic_t(T value) _NOEXCEPT : __a_value(value) {} 554 T __a_value; 555 }; 556 #define _Atomic(x) __gcc_atomic::__gcc_atomic_t<x> 557 558 template <typename T> T __create(); 559 560 template <typename __Tp, typename __Td> 561 typename enable_if<sizeof(__Tp()->__a_value = __create<__Td>()), char>::type 562 __test_atomic_assignable(int); 563 template <typename T, typename U> 564 __two __test_atomic_assignable(...); 565 566 template <typename __Tp, typename __Td> 567 struct __can_assign { 568 static const bool value = 569 sizeof(__test_atomic_assignable<__Tp, __Td>(1)) == sizeof(char); 570 }; 571 572 static inline constexpr int __to_gcc_order(memory_order __order) { 573 // Avoid switch statement to make this a constexpr. 574 return __order == memory_order_relaxed ? __ATOMIC_RELAXED: 575 (__order == memory_order_acquire ? __ATOMIC_ACQUIRE: 576 (__order == memory_order_release ? __ATOMIC_RELEASE: 577 (__order == memory_order_seq_cst ? __ATOMIC_SEQ_CST: 578 (__order == memory_order_acq_rel ? __ATOMIC_ACQ_REL: 579 __ATOMIC_CONSUME)))); 580 } 581 582 } // namespace __gcc_atomic 583 584 template <typename _Tp> 585 static inline 586 typename enable_if< 587 __gcc_atomic::__can_assign<volatile _Atomic(_Tp)*, _Tp>::value>::type 588 __c11_atomic_init(volatile _Atomic(_Tp)* __a, _Tp __val) { 589 __a->__a_value = __val; 590 } 591 592 template <typename _Tp> 593 static inline 594 typename enable_if< 595 !__gcc_atomic::__can_assign<volatile _Atomic(_Tp)*, _Tp>::value && 596 __gcc_atomic::__can_assign< _Atomic(_Tp)*, _Tp>::value>::type 597 __c11_atomic_init(volatile _Atomic(_Tp)* __a, _Tp __val) { 598 // [atomics.types.generic]p1 guarantees _Tp is trivially copyable. Because 599 // the default operator= in an object is not volatile, a byte-by-byte copy 600 // is required. 601 volatile char* to = reinterpret_cast<volatile char*>(&__a->__a_value); 602 volatile char* end = to + sizeof(_Tp); 603 char* from = reinterpret_cast<char*>(&__val); 604 while (to != end) { 605 *to++ = *from++; 606 } 607 } 608 609 template <typename _Tp> 610 static inline void __c11_atomic_init(_Atomic(_Tp)* __a, _Tp __val) { 611 __a->__a_value = __val; 612 } 613 614 static inline void __c11_atomic_thread_fence(memory_order __order) { 615 __atomic_thread_fence(__gcc_atomic::__to_gcc_order(__order)); 616 } 617 618 static inline void __c11_atomic_signal_fence(memory_order __order) { 619 __atomic_signal_fence(__gcc_atomic::__to_gcc_order(__order)); 620 } 621 622 static inline bool __c11_atomic_is_lock_free(size_t __size) { 623 return __atomic_is_lock_free(__size, 0); 624 } 625 626 template <typename _Tp> 627 static inline void __c11_atomic_store(volatile _Atomic(_Tp)* __a, _Tp __val, 628 memory_order __order) { 629 return __atomic_store(&__a->__a_value, &__val, 630 __gcc_atomic::__to_gcc_order(__order)); 631 } 632 633 template <typename _Tp> 634 static inline void __c11_atomic_store(_Atomic(_Tp)* __a, _Tp __val, 635 memory_order __order) { 636 return __atomic_store(&__a->__a_value, &__val, 637 __gcc_atomic::__to_gcc_order(__order)); 638 } 639 640 template <typename _Tp> 641 static inline _Tp __c11_atomic_load(volatile _Atomic(_Tp)* __a, 642 memory_order __order) { 643 _Tp __ret; 644 __atomic_load(&__a->__a_value, &__ret, 645 __gcc_atomic::__to_gcc_order(__order)); 646 return __ret; 647 } 648 649 template <typename _Tp> 650 static inline _Tp __c11_atomic_load(_Atomic(_Tp)* __a, memory_order __order) { 651 _Tp __ret; 652 __atomic_load(&__a->__a_value, &__ret, 653 __gcc_atomic::__to_gcc_order(__order)); 654 return __ret; 655 } 656 657 template <typename _Tp> 658 static inline _Tp __c11_atomic_exchange(volatile _Atomic(_Tp)* __a, 659 _Tp __value, memory_order __order) { 660 _Tp __ret; 661 __atomic_exchange(&__a->__a_value, &__value, &__ret, 662 __gcc_atomic::__to_gcc_order(__order)); 663 return __ret; 664 } 665 666 template <typename _Tp> 667 static inline _Tp __c11_atomic_exchange(_Atomic(_Tp)* __a, _Tp __value, 668 memory_order __order) { 669 _Tp __ret; 670 __atomic_exchange(&__a->__a_value, &__value, &__ret, 671 __gcc_atomic::__to_gcc_order(__order)); 672 return __ret; 673 } 674 675 template <typename _Tp> 676 static inline bool __c11_atomic_compare_exchange_strong( 677 volatile _Atomic(_Tp)* __a, _Tp* __expected, _Tp __value, 678 memory_order __success, memory_order __failure) { 679 return __atomic_compare_exchange(&__a->__a_value, __expected, &__value, 680 false, 681 __gcc_atomic::__to_gcc_order(__success), 682 __gcc_atomic::__to_gcc_order(__failure)); 683 } 684 685 template <typename _Tp> 686 static inline bool __c11_atomic_compare_exchange_strong( 687 _Atomic(_Tp)* __a, _Tp* __expected, _Tp __value, memory_order __success, 688 memory_order __failure) { 689 return __atomic_compare_exchange(&__a->__a_value, __expected, &__value, 690 false, 691 __gcc_atomic::__to_gcc_order(__success), 692 __gcc_atomic::__to_gcc_order(__failure)); 693 } 694 695 template <typename _Tp> 696 static inline bool __c11_atomic_compare_exchange_weak( 697 volatile _Atomic(_Tp)* __a, _Tp* __expected, _Tp __value, 698 memory_order __success, memory_order __failure) { 699 return __atomic_compare_exchange(&__a->__a_value, __expected, &__value, 700 true, 701 __gcc_atomic::__to_gcc_order(__success), 702 __gcc_atomic::__to_gcc_order(__failure)); 703 } 704 705 template <typename _Tp> 706 static inline bool __c11_atomic_compare_exchange_weak( 707 _Atomic(_Tp)* __a, _Tp* __expected, _Tp __value, memory_order __success, 708 memory_order __failure) { 709 return __atomic_compare_exchange(&__a->__a_value, __expected, &__value, 710 true, 711 __gcc_atomic::__to_gcc_order(__success), 712 __gcc_atomic::__to_gcc_order(__failure)); 713 } 714 715 template <typename _Tp> 716 struct __skip_amt { enum {value = 1}; }; 717 718 template <typename _Tp> 719 struct __skip_amt<_Tp*> { enum {value = sizeof(_Tp)}; }; 720 721 // FIXME: Haven't figured out what the spec says about using arrays with 722 // atomic_fetch_add. Force a failure rather than creating bad behavior. 723 template <typename _Tp> 724 struct __skip_amt<_Tp[]> { }; 725 template <typename _Tp, int n> 726 struct __skip_amt<_Tp[n]> { }; 727 728 template <typename _Tp, typename _Td> 729 static inline _Tp __c11_atomic_fetch_add(volatile _Atomic(_Tp)* __a, 730 _Td __delta, memory_order __order) { 731 return __atomic_fetch_add(&__a->__a_value, __delta * __skip_amt<_Tp>::value, 732 __gcc_atomic::__to_gcc_order(__order)); 733 } 734 735 template <typename _Tp, typename _Td> 736 static inline _Tp __c11_atomic_fetch_add(_Atomic(_Tp)* __a, _Td __delta, 737 memory_order __order) { 738 return __atomic_fetch_add(&__a->__a_value, __delta * __skip_amt<_Tp>::value, 739 __gcc_atomic::__to_gcc_order(__order)); 740 } 741 742 template <typename _Tp, typename _Td> 743 static inline _Tp __c11_atomic_fetch_sub(volatile _Atomic(_Tp)* __a, 744 _Td __delta, memory_order __order) { 745 return __atomic_fetch_sub(&__a->__a_value, __delta * __skip_amt<_Tp>::value, 746 __gcc_atomic::__to_gcc_order(__order)); 747 } 748 749 template <typename _Tp, typename _Td> 750 static inline _Tp __c11_atomic_fetch_sub(_Atomic(_Tp)* __a, _Td __delta, 751 memory_order __order) { 752 return __atomic_fetch_sub(&__a->__a_value, __delta * __skip_amt<_Tp>::value, 753 __gcc_atomic::__to_gcc_order(__order)); 754 } 755 756 template <typename _Tp> 757 static inline _Tp __c11_atomic_fetch_and(volatile _Atomic(_Tp)* __a, 758 _Tp __pattern, memory_order __order) { 759 return __atomic_fetch_and(&__a->__a_value, __pattern, 760 __gcc_atomic::__to_gcc_order(__order)); 761 } 762 763 template <typename _Tp> 764 static inline _Tp __c11_atomic_fetch_and(_Atomic(_Tp)* __a, 765 _Tp __pattern, memory_order __order) { 766 return __atomic_fetch_and(&__a->__a_value, __pattern, 767 __gcc_atomic::__to_gcc_order(__order)); 768 } 769 770 template <typename _Tp> 771 static inline _Tp __c11_atomic_fetch_or(volatile _Atomic(_Tp)* __a, 772 _Tp __pattern, memory_order __order) { 773 return __atomic_fetch_or(&__a->__a_value, __pattern, 774 __gcc_atomic::__to_gcc_order(__order)); 775 } 776 777 template <typename _Tp> 778 static inline _Tp __c11_atomic_fetch_or(_Atomic(_Tp)* __a, _Tp __pattern, 779 memory_order __order) { 780 return __atomic_fetch_or(&__a->__a_value, __pattern, 781 __gcc_atomic::__to_gcc_order(__order)); 782 } 783 784 template <typename _Tp> 785 static inline _Tp __c11_atomic_fetch_xor(volatile _Atomic(_Tp)* __a, 786 _Tp __pattern, memory_order __order) { 787 return __atomic_fetch_xor(&__a->__a_value, __pattern, 788 __gcc_atomic::__to_gcc_order(__order)); 789 } 790 791 template <typename _Tp> 792 static inline _Tp __c11_atomic_fetch_xor(_Atomic(_Tp)* __a, _Tp __pattern, 793 memory_order __order) { 794 return __atomic_fetch_xor(&__a->__a_value, __pattern, 795 __gcc_atomic::__to_gcc_order(__order)); 796 } 797 #endif // _GNUC_VER >= 407 798 799 template <class _Tp> 800 inline _LIBCPP_INLINE_VISIBILITY 801 _Tp 802 kill_dependency(_Tp __y) _NOEXCEPT 803 { 804 return __y; 805 } 806 807 // general atomic<T> 808 809 template <class _Tp, bool = is_integral<_Tp>::value && !is_same<_Tp, bool>::value> 810 struct __atomic_base // false 811 { 812 mutable _Atomic(_Tp) __a_; 813 814 _LIBCPP_INLINE_VISIBILITY 815 bool is_lock_free() const volatile _NOEXCEPT 816 {return __c11_atomic_is_lock_free(sizeof(_Tp));} 817 _LIBCPP_INLINE_VISIBILITY 818 bool is_lock_free() const _NOEXCEPT 819 {return __c11_atomic_is_lock_free(sizeof(_Tp));} 820 _LIBCPP_INLINE_VISIBILITY 821 void store(_Tp __d, memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT 822 {__c11_atomic_store(&__a_, __d, __m);} 823 _LIBCPP_INLINE_VISIBILITY 824 void store(_Tp __d, memory_order __m = memory_order_seq_cst) _NOEXCEPT 825 {__c11_atomic_store(&__a_, __d, __m);} 826 _LIBCPP_INLINE_VISIBILITY 827 _Tp load(memory_order __m = memory_order_seq_cst) const volatile _NOEXCEPT 828 {return __c11_atomic_load(&__a_, __m);} 829 _LIBCPP_INLINE_VISIBILITY 830 _Tp load(memory_order __m = memory_order_seq_cst) const _NOEXCEPT 831 {return __c11_atomic_load(&__a_, __m);} 832 _LIBCPP_INLINE_VISIBILITY 833 operator _Tp() const volatile _NOEXCEPT {return load();} 834 _LIBCPP_INLINE_VISIBILITY 835 operator _Tp() const _NOEXCEPT {return load();} 836 _LIBCPP_INLINE_VISIBILITY 837 _Tp exchange(_Tp __d, memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT 838 {return __c11_atomic_exchange(&__a_, __d, __m);} 839 _LIBCPP_INLINE_VISIBILITY 840 _Tp exchange(_Tp __d, memory_order __m = memory_order_seq_cst) _NOEXCEPT 841 {return __c11_atomic_exchange(&__a_, __d, __m);} 842 _LIBCPP_INLINE_VISIBILITY 843 bool compare_exchange_weak(_Tp& __e, _Tp __d, 844 memory_order __s, memory_order __f) volatile _NOEXCEPT 845 {return __c11_atomic_compare_exchange_weak(&__a_, &__e, __d, __s, __f);} 846 _LIBCPP_INLINE_VISIBILITY 847 bool compare_exchange_weak(_Tp& __e, _Tp __d, 848 memory_order __s, memory_order __f) _NOEXCEPT 849 {return __c11_atomic_compare_exchange_weak(&__a_, &__e, __d, __s, __f);} 850 _LIBCPP_INLINE_VISIBILITY 851 bool compare_exchange_strong(_Tp& __e, _Tp __d, 852 memory_order __s, memory_order __f) volatile _NOEXCEPT 853 {return __c11_atomic_compare_exchange_strong(&__a_, &__e, __d, __s, __f);} 854 _LIBCPP_INLINE_VISIBILITY 855 bool compare_exchange_strong(_Tp& __e, _Tp __d, 856 memory_order __s, memory_order __f) _NOEXCEPT 857 {return __c11_atomic_compare_exchange_strong(&__a_, &__e, __d, __s, __f);} 858 _LIBCPP_INLINE_VISIBILITY 859 bool compare_exchange_weak(_Tp& __e, _Tp __d, 860 memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT 861 {return __c11_atomic_compare_exchange_weak(&__a_, &__e, __d, __m, __m);} 862 _LIBCPP_INLINE_VISIBILITY 863 bool compare_exchange_weak(_Tp& __e, _Tp __d, 864 memory_order __m = memory_order_seq_cst) _NOEXCEPT 865 {return __c11_atomic_compare_exchange_weak(&__a_, &__e, __d, __m, __m);} 866 _LIBCPP_INLINE_VISIBILITY 867 bool compare_exchange_strong(_Tp& __e, _Tp __d, 868 memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT 869 {return __c11_atomic_compare_exchange_strong(&__a_, &__e, __d, __m, __m);} 870 _LIBCPP_INLINE_VISIBILITY 871 bool compare_exchange_strong(_Tp& __e, _Tp __d, 872 memory_order __m = memory_order_seq_cst) _NOEXCEPT 873 {return __c11_atomic_compare_exchange_strong(&__a_, &__e, __d, __m, __m);} 874 875 _LIBCPP_INLINE_VISIBILITY 876 #ifndef _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS 877 __atomic_base() _NOEXCEPT = default; 878 #else 879 __atomic_base() _NOEXCEPT : __a_() {} 880 #endif // _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS 881 882 _LIBCPP_INLINE_VISIBILITY 883 _LIBCPP_CONSTEXPR __atomic_base(_Tp __d) _NOEXCEPT : __a_(__d) {} 884 #ifndef _LIBCPP_HAS_NO_DELETED_FUNCTIONS 885 __atomic_base(const __atomic_base&) = delete; 886 __atomic_base& operator=(const __atomic_base&) = delete; 887 __atomic_base& operator=(const __atomic_base&) volatile = delete; 888 #else // _LIBCPP_HAS_NO_DELETED_FUNCTIONS 889 private: 890 __atomic_base(const __atomic_base&); 891 __atomic_base& operator=(const __atomic_base&); 892 __atomic_base& operator=(const __atomic_base&) volatile; 893 #endif // _LIBCPP_HAS_NO_DELETED_FUNCTIONS 894 }; 895 896 // atomic<Integral> 897 898 template <class _Tp> 899 struct __atomic_base<_Tp, true> 900 : public __atomic_base<_Tp, false> 901 { 902 typedef __atomic_base<_Tp, false> __base; 903 _LIBCPP_INLINE_VISIBILITY 904 __atomic_base() _NOEXCEPT _LIBCPP_DEFAULT 905 _LIBCPP_INLINE_VISIBILITY 906 _LIBCPP_CONSTEXPR __atomic_base(_Tp __d) _NOEXCEPT : __base(__d) {} 907 908 _LIBCPP_INLINE_VISIBILITY 909 _Tp fetch_add(_Tp __op, memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT 910 {return __c11_atomic_fetch_add(&this->__a_, __op, __m);} 911 _LIBCPP_INLINE_VISIBILITY 912 _Tp fetch_add(_Tp __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT 913 {return __c11_atomic_fetch_add(&this->__a_, __op, __m);} 914 _LIBCPP_INLINE_VISIBILITY 915 _Tp fetch_sub(_Tp __op, memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT 916 {return __c11_atomic_fetch_sub(&this->__a_, __op, __m);} 917 _LIBCPP_INLINE_VISIBILITY 918 _Tp fetch_sub(_Tp __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT 919 {return __c11_atomic_fetch_sub(&this->__a_, __op, __m);} 920 _LIBCPP_INLINE_VISIBILITY 921 _Tp fetch_and(_Tp __op, memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT 922 {return __c11_atomic_fetch_and(&this->__a_, __op, __m);} 923 _LIBCPP_INLINE_VISIBILITY 924 _Tp fetch_and(_Tp __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT 925 {return __c11_atomic_fetch_and(&this->__a_, __op, __m);} 926 _LIBCPP_INLINE_VISIBILITY 927 _Tp fetch_or(_Tp __op, memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT 928 {return __c11_atomic_fetch_or(&this->__a_, __op, __m);} 929 _LIBCPP_INLINE_VISIBILITY 930 _Tp fetch_or(_Tp __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT 931 {return __c11_atomic_fetch_or(&this->__a_, __op, __m);} 932 _LIBCPP_INLINE_VISIBILITY 933 _Tp fetch_xor(_Tp __op, memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT 934 {return __c11_atomic_fetch_xor(&this->__a_, __op, __m);} 935 _LIBCPP_INLINE_VISIBILITY 936 _Tp fetch_xor(_Tp __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT 937 {return __c11_atomic_fetch_xor(&this->__a_, __op, __m);} 938 939 _LIBCPP_INLINE_VISIBILITY 940 _Tp operator++(int) volatile _NOEXCEPT {return fetch_add(_Tp(1));} 941 _LIBCPP_INLINE_VISIBILITY 942 _Tp operator++(int) _NOEXCEPT {return fetch_add(_Tp(1));} 943 _LIBCPP_INLINE_VISIBILITY 944 _Tp operator--(int) volatile _NOEXCEPT {return fetch_sub(_Tp(1));} 945 _LIBCPP_INLINE_VISIBILITY 946 _Tp operator--(int) _NOEXCEPT {return fetch_sub(_Tp(1));} 947 _LIBCPP_INLINE_VISIBILITY 948 _Tp operator++() volatile _NOEXCEPT {return fetch_add(_Tp(1)) + _Tp(1);} 949 _LIBCPP_INLINE_VISIBILITY 950 _Tp operator++() _NOEXCEPT {return fetch_add(_Tp(1)) + _Tp(1);} 951 _LIBCPP_INLINE_VISIBILITY 952 _Tp operator--() volatile _NOEXCEPT {return fetch_sub(_Tp(1)) - _Tp(1);} 953 _LIBCPP_INLINE_VISIBILITY 954 _Tp operator--() _NOEXCEPT {return fetch_sub(_Tp(1)) - _Tp(1);} 955 _LIBCPP_INLINE_VISIBILITY 956 _Tp operator+=(_Tp __op) volatile _NOEXCEPT {return fetch_add(__op) + __op;} 957 _LIBCPP_INLINE_VISIBILITY 958 _Tp operator+=(_Tp __op) _NOEXCEPT {return fetch_add(__op) + __op;} 959 _LIBCPP_INLINE_VISIBILITY 960 _Tp operator-=(_Tp __op) volatile _NOEXCEPT {return fetch_sub(__op) - __op;} 961 _LIBCPP_INLINE_VISIBILITY 962 _Tp operator-=(_Tp __op) _NOEXCEPT {return fetch_sub(__op) - __op;} 963 _LIBCPP_INLINE_VISIBILITY 964 _Tp operator&=(_Tp __op) volatile _NOEXCEPT {return fetch_and(__op) & __op;} 965 _LIBCPP_INLINE_VISIBILITY 966 _Tp operator&=(_Tp __op) _NOEXCEPT {return fetch_and(__op) & __op;} 967 _LIBCPP_INLINE_VISIBILITY 968 _Tp operator|=(_Tp __op) volatile _NOEXCEPT {return fetch_or(__op) | __op;} 969 _LIBCPP_INLINE_VISIBILITY 970 _Tp operator|=(_Tp __op) _NOEXCEPT {return fetch_or(__op) | __op;} 971 _LIBCPP_INLINE_VISIBILITY 972 _Tp operator^=(_Tp __op) volatile _NOEXCEPT {return fetch_xor(__op) ^ __op;} 973 _LIBCPP_INLINE_VISIBILITY 974 _Tp operator^=(_Tp __op) _NOEXCEPT {return fetch_xor(__op) ^ __op;} 975 }; 976 977 // atomic<T> 978 979 template <class _Tp> 980 struct atomic 981 : public __atomic_base<_Tp> 982 { 983 typedef __atomic_base<_Tp> __base; 984 _LIBCPP_INLINE_VISIBILITY 985 atomic() _NOEXCEPT _LIBCPP_DEFAULT 986 _LIBCPP_INLINE_VISIBILITY 987 _LIBCPP_CONSTEXPR atomic(_Tp __d) _NOEXCEPT : __base(__d) {} 988 989 _LIBCPP_INLINE_VISIBILITY 990 _Tp operator=(_Tp __d) volatile _NOEXCEPT 991 {__base::store(__d); return __d;} 992 _LIBCPP_INLINE_VISIBILITY 993 _Tp operator=(_Tp __d) _NOEXCEPT 994 {__base::store(__d); return __d;} 995 }; 996 997 // atomic<T*> 998 999 template <class _Tp> 1000 struct atomic<_Tp*> 1001 : public __atomic_base<_Tp*> 1002 { 1003 typedef __atomic_base<_Tp*> __base; 1004 _LIBCPP_INLINE_VISIBILITY 1005 atomic() _NOEXCEPT _LIBCPP_DEFAULT 1006 _LIBCPP_INLINE_VISIBILITY 1007 _LIBCPP_CONSTEXPR atomic(_Tp* __d) _NOEXCEPT : __base(__d) {} 1008 1009 _LIBCPP_INLINE_VISIBILITY 1010 _Tp* operator=(_Tp* __d) volatile _NOEXCEPT 1011 {__base::store(__d); return __d;} 1012 _LIBCPP_INLINE_VISIBILITY 1013 _Tp* operator=(_Tp* __d) _NOEXCEPT 1014 {__base::store(__d); return __d;} 1015 1016 _LIBCPP_INLINE_VISIBILITY 1017 _Tp* fetch_add(ptrdiff_t __op, memory_order __m = memory_order_seq_cst) 1018 volatile _NOEXCEPT 1019 {return __c11_atomic_fetch_add(&this->__a_, __op, __m);} 1020 _LIBCPP_INLINE_VISIBILITY 1021 _Tp* fetch_add(ptrdiff_t __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT 1022 {return __c11_atomic_fetch_add(&this->__a_, __op, __m);} 1023 _LIBCPP_INLINE_VISIBILITY 1024 _Tp* fetch_sub(ptrdiff_t __op, memory_order __m = memory_order_seq_cst) 1025 volatile _NOEXCEPT 1026 {return __c11_atomic_fetch_sub(&this->__a_, __op, __m);} 1027 _LIBCPP_INLINE_VISIBILITY 1028 _Tp* fetch_sub(ptrdiff_t __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT 1029 {return __c11_atomic_fetch_sub(&this->__a_, __op, __m);} 1030 1031 _LIBCPP_INLINE_VISIBILITY 1032 _Tp* operator++(int) volatile _NOEXCEPT {return fetch_add(1);} 1033 _LIBCPP_INLINE_VISIBILITY 1034 _Tp* operator++(int) _NOEXCEPT {return fetch_add(1);} 1035 _LIBCPP_INLINE_VISIBILITY 1036 _Tp* operator--(int) volatile _NOEXCEPT {return fetch_sub(1);} 1037 _LIBCPP_INLINE_VISIBILITY 1038 _Tp* operator--(int) _NOEXCEPT {return fetch_sub(1);} 1039 _LIBCPP_INLINE_VISIBILITY 1040 _Tp* operator++() volatile _NOEXCEPT {return fetch_add(1) + 1;} 1041 _LIBCPP_INLINE_VISIBILITY 1042 _Tp* operator++() _NOEXCEPT {return fetch_add(1) + 1;} 1043 _LIBCPP_INLINE_VISIBILITY 1044 _Tp* operator--() volatile _NOEXCEPT {return fetch_sub(1) - 1;} 1045 _LIBCPP_INLINE_VISIBILITY 1046 _Tp* operator--() _NOEXCEPT {return fetch_sub(1) - 1;} 1047 _LIBCPP_INLINE_VISIBILITY 1048 _Tp* operator+=(ptrdiff_t __op) volatile _NOEXCEPT {return fetch_add(__op) + __op;} 1049 _LIBCPP_INLINE_VISIBILITY 1050 _Tp* operator+=(ptrdiff_t __op) _NOEXCEPT {return fetch_add(__op) + __op;} 1051 _LIBCPP_INLINE_VISIBILITY 1052 _Tp* operator-=(ptrdiff_t __op) volatile _NOEXCEPT {return fetch_sub(__op) - __op;} 1053 _LIBCPP_INLINE_VISIBILITY 1054 _Tp* operator-=(ptrdiff_t __op) _NOEXCEPT {return fetch_sub(__op) - __op;} 1055 }; 1056 1057 // atomic_is_lock_free 1058 1059 template <class _Tp> 1060 inline _LIBCPP_INLINE_VISIBILITY 1061 bool 1062 atomic_is_lock_free(const volatile atomic<_Tp>* __o) _NOEXCEPT 1063 { 1064 return __o->is_lock_free(); 1065 } 1066 1067 template <class _Tp> 1068 inline _LIBCPP_INLINE_VISIBILITY 1069 bool 1070 atomic_is_lock_free(const atomic<_Tp>* __o) _NOEXCEPT 1071 { 1072 return __o->is_lock_free(); 1073 } 1074 1075 // atomic_init 1076 1077 template <class _Tp> 1078 inline _LIBCPP_INLINE_VISIBILITY 1079 void 1080 atomic_init(volatile atomic<_Tp>* __o, _Tp __d) _NOEXCEPT 1081 { 1082 __c11_atomic_init(&__o->__a_, __d); 1083 } 1084 1085 template <class _Tp> 1086 inline _LIBCPP_INLINE_VISIBILITY 1087 void 1088 atomic_init(atomic<_Tp>* __o, _Tp __d) _NOEXCEPT 1089 { 1090 __c11_atomic_init(&__o->__a_, __d); 1091 } 1092 1093 // atomic_store 1094 1095 template <class _Tp> 1096 inline _LIBCPP_INLINE_VISIBILITY 1097 void 1098 atomic_store(volatile atomic<_Tp>* __o, _Tp __d) _NOEXCEPT 1099 { 1100 __o->store(__d); 1101 } 1102 1103 template <class _Tp> 1104 inline _LIBCPP_INLINE_VISIBILITY 1105 void 1106 atomic_store(atomic<_Tp>* __o, _Tp __d) _NOEXCEPT 1107 { 1108 __o->store(__d); 1109 } 1110 1111 // atomic_store_explicit 1112 1113 template <class _Tp> 1114 inline _LIBCPP_INLINE_VISIBILITY 1115 void 1116 atomic_store_explicit(volatile atomic<_Tp>* __o, _Tp __d, memory_order __m) _NOEXCEPT 1117 { 1118 __o->store(__d, __m); 1119 } 1120 1121 template <class _Tp> 1122 inline _LIBCPP_INLINE_VISIBILITY 1123 void 1124 atomic_store_explicit(atomic<_Tp>* __o, _Tp __d, memory_order __m) _NOEXCEPT 1125 { 1126 __o->store(__d, __m); 1127 } 1128 1129 // atomic_load 1130 1131 template <class _Tp> 1132 inline _LIBCPP_INLINE_VISIBILITY 1133 _Tp 1134 atomic_load(const volatile atomic<_Tp>* __o) _NOEXCEPT 1135 { 1136 return __o->load(); 1137 } 1138 1139 template <class _Tp> 1140 inline _LIBCPP_INLINE_VISIBILITY 1141 _Tp 1142 atomic_load(const atomic<_Tp>* __o) _NOEXCEPT 1143 { 1144 return __o->load(); 1145 } 1146 1147 // atomic_load_explicit 1148 1149 template <class _Tp> 1150 inline _LIBCPP_INLINE_VISIBILITY 1151 _Tp 1152 atomic_load_explicit(const volatile atomic<_Tp>* __o, memory_order __m) _NOEXCEPT 1153 { 1154 return __o->load(__m); 1155 } 1156 1157 template <class _Tp> 1158 inline _LIBCPP_INLINE_VISIBILITY 1159 _Tp 1160 atomic_load_explicit(const atomic<_Tp>* __o, memory_order __m) _NOEXCEPT 1161 { 1162 return __o->load(__m); 1163 } 1164 1165 // atomic_exchange 1166 1167 template <class _Tp> 1168 inline _LIBCPP_INLINE_VISIBILITY 1169 _Tp 1170 atomic_exchange(volatile atomic<_Tp>* __o, _Tp __d) _NOEXCEPT 1171 { 1172 return __o->exchange(__d); 1173 } 1174 1175 template <class _Tp> 1176 inline _LIBCPP_INLINE_VISIBILITY 1177 _Tp 1178 atomic_exchange(atomic<_Tp>* __o, _Tp __d) _NOEXCEPT 1179 { 1180 return __o->exchange(__d); 1181 } 1182 1183 // atomic_exchange_explicit 1184 1185 template <class _Tp> 1186 inline _LIBCPP_INLINE_VISIBILITY 1187 _Tp 1188 atomic_exchange_explicit(volatile atomic<_Tp>* __o, _Tp __d, memory_order __m) _NOEXCEPT 1189 { 1190 return __o->exchange(__d, __m); 1191 } 1192 1193 template <class _Tp> 1194 inline _LIBCPP_INLINE_VISIBILITY 1195 _Tp 1196 atomic_exchange_explicit(atomic<_Tp>* __o, _Tp __d, memory_order __m) _NOEXCEPT 1197 { 1198 return __o->exchange(__d, __m); 1199 } 1200 1201 // atomic_compare_exchange_weak 1202 1203 template <class _Tp> 1204 inline _LIBCPP_INLINE_VISIBILITY 1205 bool 1206 atomic_compare_exchange_weak(volatile atomic<_Tp>* __o, _Tp* __e, _Tp __d) _NOEXCEPT 1207 { 1208 return __o->compare_exchange_weak(*__e, __d); 1209 } 1210 1211 template <class _Tp> 1212 inline _LIBCPP_INLINE_VISIBILITY 1213 bool 1214 atomic_compare_exchange_weak(atomic<_Tp>* __o, _Tp* __e, _Tp __d) _NOEXCEPT 1215 { 1216 return __o->compare_exchange_weak(*__e, __d); 1217 } 1218 1219 // atomic_compare_exchange_strong 1220 1221 template <class _Tp> 1222 inline _LIBCPP_INLINE_VISIBILITY 1223 bool 1224 atomic_compare_exchange_strong(volatile atomic<_Tp>* __o, _Tp* __e, _Tp __d) _NOEXCEPT 1225 { 1226 return __o->compare_exchange_strong(*__e, __d); 1227 } 1228 1229 template <class _Tp> 1230 inline _LIBCPP_INLINE_VISIBILITY 1231 bool 1232 atomic_compare_exchange_strong(atomic<_Tp>* __o, _Tp* __e, _Tp __d) _NOEXCEPT 1233 { 1234 return __o->compare_exchange_strong(*__e, __d); 1235 } 1236 1237 // atomic_compare_exchange_weak_explicit 1238 1239 template <class _Tp> 1240 inline _LIBCPP_INLINE_VISIBILITY 1241 bool 1242 atomic_compare_exchange_weak_explicit(volatile atomic<_Tp>* __o, _Tp* __e, 1243 _Tp __d, 1244 memory_order __s, memory_order __f) _NOEXCEPT 1245 { 1246 return __o->compare_exchange_weak(*__e, __d, __s, __f); 1247 } 1248 1249 template <class _Tp> 1250 inline _LIBCPP_INLINE_VISIBILITY 1251 bool 1252 atomic_compare_exchange_weak_explicit(atomic<_Tp>* __o, _Tp* __e, _Tp __d, 1253 memory_order __s, memory_order __f) _NOEXCEPT 1254 { 1255 return __o->compare_exchange_weak(*__e, __d, __s, __f); 1256 } 1257 1258 // atomic_compare_exchange_strong_explicit 1259 1260 template <class _Tp> 1261 inline _LIBCPP_INLINE_VISIBILITY 1262 bool 1263 atomic_compare_exchange_strong_explicit(volatile atomic<_Tp>* __o, 1264 _Tp* __e, _Tp __d, 1265 memory_order __s, memory_order __f) _NOEXCEPT 1266 { 1267 return __o->compare_exchange_strong(*__e, __d, __s, __f); 1268 } 1269 1270 template <class _Tp> 1271 inline _LIBCPP_INLINE_VISIBILITY 1272 bool 1273 atomic_compare_exchange_strong_explicit(atomic<_Tp>* __o, _Tp* __e, 1274 _Tp __d, 1275 memory_order __s, memory_order __f) _NOEXCEPT 1276 { 1277 return __o->compare_exchange_strong(*__e, __d, __s, __f); 1278 } 1279 1280 // atomic_fetch_add 1281 1282 template <class _Tp> 1283 inline _LIBCPP_INLINE_VISIBILITY 1284 typename enable_if 1285 < 1286 is_integral<_Tp>::value && !is_same<_Tp, bool>::value, 1287 _Tp 1288 >::type 1289 atomic_fetch_add(volatile atomic<_Tp>* __o, _Tp __op) _NOEXCEPT 1290 { 1291 return __o->fetch_add(__op); 1292 } 1293 1294 template <class _Tp> 1295 inline _LIBCPP_INLINE_VISIBILITY 1296 typename enable_if 1297 < 1298 is_integral<_Tp>::value && !is_same<_Tp, bool>::value, 1299 _Tp 1300 >::type 1301 atomic_fetch_add(atomic<_Tp>* __o, _Tp __op) _NOEXCEPT 1302 { 1303 return __o->fetch_add(__op); 1304 } 1305 1306 template <class _Tp> 1307 inline _LIBCPP_INLINE_VISIBILITY 1308 _Tp* 1309 atomic_fetch_add(volatile atomic<_Tp*>* __o, ptrdiff_t __op) _NOEXCEPT 1310 { 1311 return __o->fetch_add(__op); 1312 } 1313 1314 template <class _Tp> 1315 inline _LIBCPP_INLINE_VISIBILITY 1316 _Tp* 1317 atomic_fetch_add(atomic<_Tp*>* __o, ptrdiff_t __op) _NOEXCEPT 1318 { 1319 return __o->fetch_add(__op); 1320 } 1321 1322 // atomic_fetch_add_explicit 1323 1324 template <class _Tp> 1325 inline _LIBCPP_INLINE_VISIBILITY 1326 typename enable_if 1327 < 1328 is_integral<_Tp>::value && !is_same<_Tp, bool>::value, 1329 _Tp 1330 >::type 1331 atomic_fetch_add_explicit(volatile atomic<_Tp>* __o, _Tp __op, memory_order __m) _NOEXCEPT 1332 { 1333 return __o->fetch_add(__op, __m); 1334 } 1335 1336 template <class _Tp> 1337 inline _LIBCPP_INLINE_VISIBILITY 1338 typename enable_if 1339 < 1340 is_integral<_Tp>::value && !is_same<_Tp, bool>::value, 1341 _Tp 1342 >::type 1343 atomic_fetch_add_explicit(atomic<_Tp>* __o, _Tp __op, memory_order __m) _NOEXCEPT 1344 { 1345 return __o->fetch_add(__op, __m); 1346 } 1347 1348 template <class _Tp> 1349 inline _LIBCPP_INLINE_VISIBILITY 1350 _Tp* 1351 atomic_fetch_add_explicit(volatile atomic<_Tp*>* __o, ptrdiff_t __op, 1352 memory_order __m) _NOEXCEPT 1353 { 1354 return __o->fetch_add(__op, __m); 1355 } 1356 1357 template <class _Tp> 1358 inline _LIBCPP_INLINE_VISIBILITY 1359 _Tp* 1360 atomic_fetch_add_explicit(atomic<_Tp*>* __o, ptrdiff_t __op, memory_order __m) _NOEXCEPT 1361 { 1362 return __o->fetch_add(__op, __m); 1363 } 1364 1365 // atomic_fetch_sub 1366 1367 template <class _Tp> 1368 inline _LIBCPP_INLINE_VISIBILITY 1369 typename enable_if 1370 < 1371 is_integral<_Tp>::value && !is_same<_Tp, bool>::value, 1372 _Tp 1373 >::type 1374 atomic_fetch_sub(volatile atomic<_Tp>* __o, _Tp __op) _NOEXCEPT 1375 { 1376 return __o->fetch_sub(__op); 1377 } 1378 1379 template <class _Tp> 1380 inline _LIBCPP_INLINE_VISIBILITY 1381 typename enable_if 1382 < 1383 is_integral<_Tp>::value && !is_same<_Tp, bool>::value, 1384 _Tp 1385 >::type 1386 atomic_fetch_sub(atomic<_Tp>* __o, _Tp __op) _NOEXCEPT 1387 { 1388 return __o->fetch_sub(__op); 1389 } 1390 1391 template <class _Tp> 1392 inline _LIBCPP_INLINE_VISIBILITY 1393 _Tp* 1394 atomic_fetch_sub(volatile atomic<_Tp*>* __o, ptrdiff_t __op) _NOEXCEPT 1395 { 1396 return __o->fetch_sub(__op); 1397 } 1398 1399 template <class _Tp> 1400 inline _LIBCPP_INLINE_VISIBILITY 1401 _Tp* 1402 atomic_fetch_sub(atomic<_Tp*>* __o, ptrdiff_t __op) _NOEXCEPT 1403 { 1404 return __o->fetch_sub(__op); 1405 } 1406 1407 // atomic_fetch_sub_explicit 1408 1409 template <class _Tp> 1410 inline _LIBCPP_INLINE_VISIBILITY 1411 typename enable_if 1412 < 1413 is_integral<_Tp>::value && !is_same<_Tp, bool>::value, 1414 _Tp 1415 >::type 1416 atomic_fetch_sub_explicit(volatile atomic<_Tp>* __o, _Tp __op, memory_order __m) _NOEXCEPT 1417 { 1418 return __o->fetch_sub(__op, __m); 1419 } 1420 1421 template <class _Tp> 1422 inline _LIBCPP_INLINE_VISIBILITY 1423 typename enable_if 1424 < 1425 is_integral<_Tp>::value && !is_same<_Tp, bool>::value, 1426 _Tp 1427 >::type 1428 atomic_fetch_sub_explicit(atomic<_Tp>* __o, _Tp __op, memory_order __m) _NOEXCEPT 1429 { 1430 return __o->fetch_sub(__op, __m); 1431 } 1432 1433 template <class _Tp> 1434 inline _LIBCPP_INLINE_VISIBILITY 1435 _Tp* 1436 atomic_fetch_sub_explicit(volatile atomic<_Tp*>* __o, ptrdiff_t __op, 1437 memory_order __m) _NOEXCEPT 1438 { 1439 return __o->fetch_sub(__op, __m); 1440 } 1441 1442 template <class _Tp> 1443 inline _LIBCPP_INLINE_VISIBILITY 1444 _Tp* 1445 atomic_fetch_sub_explicit(atomic<_Tp*>* __o, ptrdiff_t __op, memory_order __m) _NOEXCEPT 1446 { 1447 return __o->fetch_sub(__op, __m); 1448 } 1449 1450 // atomic_fetch_and 1451 1452 template <class _Tp> 1453 inline _LIBCPP_INLINE_VISIBILITY 1454 typename enable_if 1455 < 1456 is_integral<_Tp>::value && !is_same<_Tp, bool>::value, 1457 _Tp 1458 >::type 1459 atomic_fetch_and(volatile atomic<_Tp>* __o, _Tp __op) _NOEXCEPT 1460 { 1461 return __o->fetch_and(__op); 1462 } 1463 1464 template <class _Tp> 1465 inline _LIBCPP_INLINE_VISIBILITY 1466 typename enable_if 1467 < 1468 is_integral<_Tp>::value && !is_same<_Tp, bool>::value, 1469 _Tp 1470 >::type 1471 atomic_fetch_and(atomic<_Tp>* __o, _Tp __op) _NOEXCEPT 1472 { 1473 return __o->fetch_and(__op); 1474 } 1475 1476 // atomic_fetch_and_explicit 1477 1478 template <class _Tp> 1479 inline _LIBCPP_INLINE_VISIBILITY 1480 typename enable_if 1481 < 1482 is_integral<_Tp>::value && !is_same<_Tp, bool>::value, 1483 _Tp 1484 >::type 1485 atomic_fetch_and_explicit(volatile atomic<_Tp>* __o, _Tp __op, memory_order __m) _NOEXCEPT 1486 { 1487 return __o->fetch_and(__op, __m); 1488 } 1489 1490 template <class _Tp> 1491 inline _LIBCPP_INLINE_VISIBILITY 1492 typename enable_if 1493 < 1494 is_integral<_Tp>::value && !is_same<_Tp, bool>::value, 1495 _Tp 1496 >::type 1497 atomic_fetch_and_explicit(atomic<_Tp>* __o, _Tp __op, memory_order __m) _NOEXCEPT 1498 { 1499 return __o->fetch_and(__op, __m); 1500 } 1501 1502 // atomic_fetch_or 1503 1504 template <class _Tp> 1505 inline _LIBCPP_INLINE_VISIBILITY 1506 typename enable_if 1507 < 1508 is_integral<_Tp>::value && !is_same<_Tp, bool>::value, 1509 _Tp 1510 >::type 1511 atomic_fetch_or(volatile atomic<_Tp>* __o, _Tp __op) _NOEXCEPT 1512 { 1513 return __o->fetch_or(__op); 1514 } 1515 1516 template <class _Tp> 1517 inline _LIBCPP_INLINE_VISIBILITY 1518 typename enable_if 1519 < 1520 is_integral<_Tp>::value && !is_same<_Tp, bool>::value, 1521 _Tp 1522 >::type 1523 atomic_fetch_or(atomic<_Tp>* __o, _Tp __op) _NOEXCEPT 1524 { 1525 return __o->fetch_or(__op); 1526 } 1527 1528 // atomic_fetch_or_explicit 1529 1530 template <class _Tp> 1531 inline _LIBCPP_INLINE_VISIBILITY 1532 typename enable_if 1533 < 1534 is_integral<_Tp>::value && !is_same<_Tp, bool>::value, 1535 _Tp 1536 >::type 1537 atomic_fetch_or_explicit(volatile atomic<_Tp>* __o, _Tp __op, memory_order __m) _NOEXCEPT 1538 { 1539 return __o->fetch_or(__op, __m); 1540 } 1541 1542 template <class _Tp> 1543 inline _LIBCPP_INLINE_VISIBILITY 1544 typename enable_if 1545 < 1546 is_integral<_Tp>::value && !is_same<_Tp, bool>::value, 1547 _Tp 1548 >::type 1549 atomic_fetch_or_explicit(atomic<_Tp>* __o, _Tp __op, memory_order __m) _NOEXCEPT 1550 { 1551 return __o->fetch_or(__op, __m); 1552 } 1553 1554 // atomic_fetch_xor 1555 1556 template <class _Tp> 1557 inline _LIBCPP_INLINE_VISIBILITY 1558 typename enable_if 1559 < 1560 is_integral<_Tp>::value && !is_same<_Tp, bool>::value, 1561 _Tp 1562 >::type 1563 atomic_fetch_xor(volatile atomic<_Tp>* __o, _Tp __op) _NOEXCEPT 1564 { 1565 return __o->fetch_xor(__op); 1566 } 1567 1568 template <class _Tp> 1569 inline _LIBCPP_INLINE_VISIBILITY 1570 typename enable_if 1571 < 1572 is_integral<_Tp>::value && !is_same<_Tp, bool>::value, 1573 _Tp 1574 >::type 1575 atomic_fetch_xor(atomic<_Tp>* __o, _Tp __op) _NOEXCEPT 1576 { 1577 return __o->fetch_xor(__op); 1578 } 1579 1580 // atomic_fetch_xor_explicit 1581 1582 template <class _Tp> 1583 inline _LIBCPP_INLINE_VISIBILITY 1584 typename enable_if 1585 < 1586 is_integral<_Tp>::value && !is_same<_Tp, bool>::value, 1587 _Tp 1588 >::type 1589 atomic_fetch_xor_explicit(volatile atomic<_Tp>* __o, _Tp __op, memory_order __m) _NOEXCEPT 1590 { 1591 return __o->fetch_xor(__op, __m); 1592 } 1593 1594 template <class _Tp> 1595 inline _LIBCPP_INLINE_VISIBILITY 1596 typename enable_if 1597 < 1598 is_integral<_Tp>::value && !is_same<_Tp, bool>::value, 1599 _Tp 1600 >::type 1601 atomic_fetch_xor_explicit(atomic<_Tp>* __o, _Tp __op, memory_order __m) _NOEXCEPT 1602 { 1603 return __o->fetch_xor(__op, __m); 1604 } 1605 1606 // flag type and operations 1607 1608 typedef struct atomic_flag 1609 { 1610 _Atomic(bool) __a_; 1611 1612 _LIBCPP_INLINE_VISIBILITY 1613 bool test_and_set(memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT 1614 {return __c11_atomic_exchange(&__a_, true, __m);} 1615 _LIBCPP_INLINE_VISIBILITY 1616 bool test_and_set(memory_order __m = memory_order_seq_cst) _NOEXCEPT 1617 {return __c11_atomic_exchange(&__a_, true, __m);} 1618 _LIBCPP_INLINE_VISIBILITY 1619 void clear(memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT 1620 {__c11_atomic_store(&__a_, false, __m);} 1621 _LIBCPP_INLINE_VISIBILITY 1622 void clear(memory_order __m = memory_order_seq_cst) _NOEXCEPT 1623 {__c11_atomic_store(&__a_, false, __m);} 1624 1625 _LIBCPP_INLINE_VISIBILITY 1626 #ifndef _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS 1627 atomic_flag() _NOEXCEPT = default; 1628 #else 1629 atomic_flag() _NOEXCEPT : __a_() {} 1630 #endif // _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS 1631 1632 _LIBCPP_INLINE_VISIBILITY 1633 atomic_flag(bool __b) _NOEXCEPT : __a_(__b) {} 1634 1635 #ifndef _LIBCPP_HAS_NO_DELETED_FUNCTIONS 1636 atomic_flag(const atomic_flag&) = delete; 1637 atomic_flag& operator=(const atomic_flag&) = delete; 1638 atomic_flag& operator=(const atomic_flag&) volatile = delete; 1639 #else // _LIBCPP_HAS_NO_DELETED_FUNCTIONS 1640 private: 1641 atomic_flag(const atomic_flag&); 1642 atomic_flag& operator=(const atomic_flag&); 1643 atomic_flag& operator=(const atomic_flag&) volatile; 1644 #endif // _LIBCPP_HAS_NO_DELETED_FUNCTIONS 1645 } atomic_flag; 1646 1647 inline _LIBCPP_INLINE_VISIBILITY 1648 bool 1649 atomic_flag_test_and_set(volatile atomic_flag* __o) _NOEXCEPT 1650 { 1651 return __o->test_and_set(); 1652 } 1653 1654 inline _LIBCPP_INLINE_VISIBILITY 1655 bool 1656 atomic_flag_test_and_set(atomic_flag* __o) _NOEXCEPT 1657 { 1658 return __o->test_and_set(); 1659 } 1660 1661 inline _LIBCPP_INLINE_VISIBILITY 1662 bool 1663 atomic_flag_test_and_set_explicit(volatile atomic_flag* __o, memory_order __m) _NOEXCEPT 1664 { 1665 return __o->test_and_set(__m); 1666 } 1667 1668 inline _LIBCPP_INLINE_VISIBILITY 1669 bool 1670 atomic_flag_test_and_set_explicit(atomic_flag* __o, memory_order __m) _NOEXCEPT 1671 { 1672 return __o->test_and_set(__m); 1673 } 1674 1675 inline _LIBCPP_INLINE_VISIBILITY 1676 void 1677 atomic_flag_clear(volatile atomic_flag* __o) _NOEXCEPT 1678 { 1679 __o->clear(); 1680 } 1681 1682 inline _LIBCPP_INLINE_VISIBILITY 1683 void 1684 atomic_flag_clear(atomic_flag* __o) _NOEXCEPT 1685 { 1686 __o->clear(); 1687 } 1688 1689 inline _LIBCPP_INLINE_VISIBILITY 1690 void 1691 atomic_flag_clear_explicit(volatile atomic_flag* __o, memory_order __m) _NOEXCEPT 1692 { 1693 __o->clear(__m); 1694 } 1695 1696 inline _LIBCPP_INLINE_VISIBILITY 1697 void 1698 atomic_flag_clear_explicit(atomic_flag* __o, memory_order __m) _NOEXCEPT 1699 { 1700 __o->clear(__m); 1701 } 1702 1703 // fences 1704 1705 inline _LIBCPP_INLINE_VISIBILITY 1706 void 1707 atomic_thread_fence(memory_order __m) _NOEXCEPT 1708 { 1709 __c11_atomic_thread_fence(__m); 1710 } 1711 1712 inline _LIBCPP_INLINE_VISIBILITY 1713 void 1714 atomic_signal_fence(memory_order __m) _NOEXCEPT 1715 { 1716 __c11_atomic_signal_fence(__m); 1717 } 1718 1719 // Atomics for standard typedef types 1720 1721 typedef atomic<bool> atomic_bool; 1722 typedef atomic<char> atomic_char; 1723 typedef atomic<signed char> atomic_schar; 1724 typedef atomic<unsigned char> atomic_uchar; 1725 typedef atomic<short> atomic_short; 1726 typedef atomic<unsigned short> atomic_ushort; 1727 typedef atomic<int> atomic_int; 1728 typedef atomic<unsigned int> atomic_uint; 1729 typedef atomic<long> atomic_long; 1730 typedef atomic<unsigned long> atomic_ulong; 1731 typedef atomic<long long> atomic_llong; 1732 typedef atomic<unsigned long long> atomic_ullong; 1733 typedef atomic<char16_t> atomic_char16_t; 1734 typedef atomic<char32_t> atomic_char32_t; 1735 typedef atomic<wchar_t> atomic_wchar_t; 1736 1737 typedef atomic<int_least8_t> atomic_int_least8_t; 1738 typedef atomic<uint_least8_t> atomic_uint_least8_t; 1739 typedef atomic<int_least16_t> atomic_int_least16_t; 1740 typedef atomic<uint_least16_t> atomic_uint_least16_t; 1741 typedef atomic<int_least32_t> atomic_int_least32_t; 1742 typedef atomic<uint_least32_t> atomic_uint_least32_t; 1743 typedef atomic<int_least64_t> atomic_int_least64_t; 1744 typedef atomic<uint_least64_t> atomic_uint_least64_t; 1745 1746 typedef atomic<int_fast8_t> atomic_int_fast8_t; 1747 typedef atomic<uint_fast8_t> atomic_uint_fast8_t; 1748 typedef atomic<int_fast16_t> atomic_int_fast16_t; 1749 typedef atomic<uint_fast16_t> atomic_uint_fast16_t; 1750 typedef atomic<int_fast32_t> atomic_int_fast32_t; 1751 typedef atomic<uint_fast32_t> atomic_uint_fast32_t; 1752 typedef atomic<int_fast64_t> atomic_int_fast64_t; 1753 typedef atomic<uint_fast64_t> atomic_uint_fast64_t; 1754 1755 typedef atomic<intptr_t> atomic_intptr_t; 1756 typedef atomic<uintptr_t> atomic_uintptr_t; 1757 typedef atomic<size_t> atomic_size_t; 1758 typedef atomic<ptrdiff_t> atomic_ptrdiff_t; 1759 typedef atomic<intmax_t> atomic_intmax_t; 1760 typedef atomic<uintmax_t> atomic_uintmax_t; 1761 1762 #define ATOMIC_FLAG_INIT {false} 1763 #define ATOMIC_VAR_INIT(__v) {__v} 1764 1765 // lock-free property 1766 1767 #define ATOMIC_BOOL_LOCK_FREE __GCC_ATOMIC_BOOL_LOCK_FREE 1768 #define ATOMIC_CHAR_LOCK_FREE __GCC_ATOMIC_CHAR_LOCK_FREE 1769 #define ATOMIC_CHAR16_T_LOCK_FREE __GCC_ATOMIC_CHAR16_T_LOCK_FREE 1770 #define ATOMIC_CHAR32_T_LOCK_FREE __GCC_ATOMIC_CHAR32_T_LOCK_FREE 1771 #define ATOMIC_WCHAR_T_LOCK_FREE __GCC_ATOMIC_WCHAR_T_LOCK_FREE 1772 #define ATOMIC_SHORT_LOCK_FREE __GCC_ATOMIC_SHORT_LOCK_FREE 1773 #define ATOMIC_INT_LOCK_FREE __GCC_ATOMIC_INT_LOCK_FREE 1774 #define ATOMIC_LONG_LOCK_FREE __GCC_ATOMIC_LONG_LOCK_FREE 1775 #define ATOMIC_LLONG_LOCK_FREE __GCC_ATOMIC_LLONG_LOCK_FREE 1776 #define ATOMIC_POINTER_LOCK_FREE __GCC_ATOMIC_POINTER_LOCK_FREE 1777 1778 #endif // !__has_feature(cxx_atomic) 1779 1780 _LIBCPP_END_NAMESPACE_STD 1781 1782 #endif // _LIBCPP_ATOMIC 1783
