2 //===--------------------------- atomic -----------------------------------===//
4 // The LLVM Compiler Infrastructure
6 // This file is distributed under the University of Illinois Open Source
7 // License. See LICENSE.TXT for details.
9 //===----------------------------------------------------------------------===//
11 #ifndef _LIBCPP_ATOMIC
12 #define _LIBCPP_ATOMIC
22 #define __cpp_lib_atomic_is_always_lock_free // as specified by SG10
24 // order and consistency
26 typedef enum memory_order
29 memory_order_consume, // load-consume
30 memory_order_acquire, // load-acquire
31 memory_order_release, // store-release
32 memory_order_acq_rel, // store-release load-acquire
33 memory_order_seq_cst // store-release load-acquire
36 template <class T> T kill_dependency(T y) noexcept;
40 #define ATOMIC_BOOL_LOCK_FREE unspecified
41 #define ATOMIC_CHAR_LOCK_FREE unspecified
42 #define ATOMIC_CHAR16_T_LOCK_FREE unspecified
43 #define ATOMIC_CHAR32_T_LOCK_FREE unspecified
44 #define ATOMIC_WCHAR_T_LOCK_FREE unspecified
45 #define ATOMIC_SHORT_LOCK_FREE unspecified
46 #define ATOMIC_INT_LOCK_FREE unspecified
47 #define ATOMIC_LONG_LOCK_FREE unspecified
48 #define ATOMIC_LLONG_LOCK_FREE unspecified
49 #define ATOMIC_POINTER_LOCK_FREE unspecified
51 // flag type and operations
53 typedef struct atomic_flag
55 bool test_and_set(memory_order m = memory_order_seq_cst) volatile noexcept;
56 bool test_and_set(memory_order m = memory_order_seq_cst) noexcept;
57 void clear(memory_order m = memory_order_seq_cst) volatile noexcept;
58 void clear(memory_order m = memory_order_seq_cst) noexcept;
59 atomic_flag() noexcept = default;
60 atomic_flag(const atomic_flag&) = delete;
61 atomic_flag& operator=(const atomic_flag&) = delete;
62 atomic_flag& operator=(const atomic_flag&) volatile = delete;
66 atomic_flag_test_and_set(volatile atomic_flag* obj) noexcept;
69 atomic_flag_test_and_set(atomic_flag* obj) noexcept;
72 atomic_flag_test_and_set_explicit(volatile atomic_flag* obj,
73 memory_order m) noexcept;
76 atomic_flag_test_and_set_explicit(atomic_flag* obj, memory_order m) noexcept;
79 atomic_flag_clear(volatile atomic_flag* obj) noexcept;
82 atomic_flag_clear(atomic_flag* obj) noexcept;
85 atomic_flag_clear_explicit(volatile atomic_flag* obj, memory_order m) noexcept;
88 atomic_flag_clear_explicit(atomic_flag* obj, memory_order m) noexcept;
90 #define ATOMIC_FLAG_INIT see below
91 #define ATOMIC_VAR_INIT(value) see below
96 static constexpr bool is_always_lock_free;
97 bool is_lock_free() const volatile noexcept;
98 bool is_lock_free() const noexcept;
99 void store(T desr, memory_order m = memory_order_seq_cst) volatile noexcept;
100 void store(T desr, memory_order m = memory_order_seq_cst) noexcept;
101 T load(memory_order m = memory_order_seq_cst) const volatile noexcept;
102 T load(memory_order m = memory_order_seq_cst) const noexcept;
103 operator T() const volatile noexcept;
104 operator T() const noexcept;
105 T exchange(T desr, memory_order m = memory_order_seq_cst) volatile noexcept;
106 T exchange(T desr, memory_order m = memory_order_seq_cst) noexcept;
107 bool compare_exchange_weak(T& expc, T desr,
108 memory_order s, memory_order f) volatile noexcept;
109 bool compare_exchange_weak(T& expc, T desr, memory_order s, memory_order f) noexcept;
110 bool compare_exchange_strong(T& expc, T desr,
111 memory_order s, memory_order f) volatile noexcept;
112 bool compare_exchange_strong(T& expc, T desr,
113 memory_order s, memory_order f) noexcept;
114 bool compare_exchange_weak(T& expc, T desr,
115 memory_order m = memory_order_seq_cst) volatile noexcept;
116 bool compare_exchange_weak(T& expc, T desr,
117 memory_order m = memory_order_seq_cst) noexcept;
118 bool compare_exchange_strong(T& expc, T desr,
119 memory_order m = memory_order_seq_cst) volatile noexcept;
120 bool compare_exchange_strong(T& expc, T desr,
121 memory_order m = memory_order_seq_cst) noexcept;
123 atomic() noexcept = default;
124 constexpr atomic(T desr) noexcept;
125 atomic(const atomic&) = delete;
126 atomic& operator=(const atomic&) = delete;
127 atomic& operator=(const atomic&) volatile = delete;
128 T operator=(T) volatile noexcept;
129 T operator=(T) noexcept;
133 struct atomic<integral>
135 static constexpr bool is_always_lock_free;
136 bool is_lock_free() const volatile noexcept;
137 bool is_lock_free() const noexcept;
138 void store(integral desr, memory_order m = memory_order_seq_cst) volatile noexcept;
139 void store(integral desr, memory_order m = memory_order_seq_cst) noexcept;
140 integral load(memory_order m = memory_order_seq_cst) const volatile noexcept;
141 integral load(memory_order m = memory_order_seq_cst) const noexcept;
142 operator integral() const volatile noexcept;
143 operator integral() const noexcept;
144 integral exchange(integral desr,
145 memory_order m = memory_order_seq_cst) volatile noexcept;
146 integral exchange(integral desr, memory_order m = memory_order_seq_cst) noexcept;
147 bool compare_exchange_weak(integral& expc, integral desr,
148 memory_order s, memory_order f) volatile noexcept;
149 bool compare_exchange_weak(integral& expc, integral desr,
150 memory_order s, memory_order f) noexcept;
151 bool compare_exchange_strong(integral& expc, integral desr,
152 memory_order s, memory_order f) volatile noexcept;
153 bool compare_exchange_strong(integral& expc, integral desr,
154 memory_order s, memory_order f) noexcept;
155 bool compare_exchange_weak(integral& expc, integral desr,
156 memory_order m = memory_order_seq_cst) volatile noexcept;
157 bool compare_exchange_weak(integral& expc, integral desr,
158 memory_order m = memory_order_seq_cst) noexcept;
159 bool compare_exchange_strong(integral& expc, integral desr,
160 memory_order m = memory_order_seq_cst) volatile noexcept;
161 bool compare_exchange_strong(integral& expc, integral desr,
162 memory_order m = memory_order_seq_cst) noexcept;
165 fetch_add(integral op, memory_order m = memory_order_seq_cst) volatile noexcept;
166 integral fetch_add(integral op, memory_order m = memory_order_seq_cst) noexcept;
168 fetch_sub(integral op, memory_order m = memory_order_seq_cst) volatile noexcept;
169 integral fetch_sub(integral op, memory_order m = memory_order_seq_cst) noexcept;
171 fetch_and(integral op, memory_order m = memory_order_seq_cst) volatile noexcept;
172 integral fetch_and(integral op, memory_order m = memory_order_seq_cst) noexcept;
174 fetch_or(integral op, memory_order m = memory_order_seq_cst) volatile noexcept;
175 integral fetch_or(integral op, memory_order m = memory_order_seq_cst) noexcept;
177 fetch_xor(integral op, memory_order m = memory_order_seq_cst) volatile noexcept;
178 integral fetch_xor(integral op, memory_order m = memory_order_seq_cst) noexcept;
180 atomic() noexcept = default;
181 constexpr atomic(integral desr) noexcept;
182 atomic(const atomic&) = delete;
183 atomic& operator=(const atomic&) = delete;
184 atomic& operator=(const atomic&) volatile = delete;
185 integral operator=(integral desr) volatile noexcept;
186 integral operator=(integral desr) noexcept;
188 integral operator++(int) volatile noexcept;
189 integral operator++(int) noexcept;
190 integral operator--(int) volatile noexcept;
191 integral operator--(int) noexcept;
192 integral operator++() volatile noexcept;
193 integral operator++() noexcept;
194 integral operator--() volatile noexcept;
195 integral operator--() 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 integral operator&=(integral op) volatile noexcept;
201 integral operator&=(integral op) noexcept;
202 integral operator|=(integral op) volatile noexcept;
203 integral operator|=(integral op) noexcept;
204 integral operator^=(integral op) volatile noexcept;
205 integral operator^=(integral op) noexcept;
211 static constexpr bool is_always_lock_free;
212 bool is_lock_free() const volatile noexcept;
213 bool is_lock_free() const noexcept;
214 void store(T* desr, memory_order m = memory_order_seq_cst) volatile noexcept;
215 void store(T* desr, memory_order m = memory_order_seq_cst) noexcept;
216 T* load(memory_order m = memory_order_seq_cst) const volatile noexcept;
217 T* load(memory_order m = memory_order_seq_cst) const noexcept;
218 operator T*() const volatile noexcept;
219 operator T*() const noexcept;
220 T* exchange(T* desr, memory_order m = memory_order_seq_cst) volatile noexcept;
221 T* exchange(T* desr, memory_order m = memory_order_seq_cst) noexcept;
222 bool compare_exchange_weak(T*& expc, T* desr,
223 memory_order s, memory_order f) volatile noexcept;
224 bool compare_exchange_weak(T*& expc, T* desr,
225 memory_order s, memory_order f) noexcept;
226 bool compare_exchange_strong(T*& expc, T* desr,
227 memory_order s, memory_order f) volatile noexcept;
228 bool compare_exchange_strong(T*& expc, T* desr,
229 memory_order s, memory_order f) noexcept;
230 bool compare_exchange_weak(T*& expc, T* desr,
231 memory_order m = memory_order_seq_cst) volatile noexcept;
232 bool compare_exchange_weak(T*& expc, T* desr,
233 memory_order m = memory_order_seq_cst) noexcept;
234 bool compare_exchange_strong(T*& expc, T* desr,
235 memory_order m = memory_order_seq_cst) volatile noexcept;
236 bool compare_exchange_strong(T*& expc, T* desr,
237 memory_order m = memory_order_seq_cst) noexcept;
238 T* fetch_add(ptrdiff_t op, memory_order m = memory_order_seq_cst) volatile noexcept;
239 T* fetch_add(ptrdiff_t op, memory_order m = memory_order_seq_cst) noexcept;
240 T* fetch_sub(ptrdiff_t op, memory_order m = memory_order_seq_cst) volatile noexcept;
241 T* fetch_sub(ptrdiff_t op, memory_order m = memory_order_seq_cst) noexcept;
243 atomic() noexcept = default;
244 constexpr atomic(T* desr) noexcept;
245 atomic(const atomic&) = delete;
246 atomic& operator=(const atomic&) = delete;
247 atomic& operator=(const atomic&) volatile = delete;
249 T* operator=(T*) volatile noexcept;
250 T* operator=(T*) noexcept;
251 T* operator++(int) volatile noexcept;
252 T* operator++(int) noexcept;
253 T* operator--(int) volatile noexcept;
254 T* operator--(int) noexcept;
255 T* operator++() volatile noexcept;
256 T* operator++() noexcept;
257 T* operator--() volatile noexcept;
258 T* operator--() noexcept;
259 T* operator+=(ptrdiff_t op) volatile noexcept;
260 T* operator+=(ptrdiff_t op) noexcept;
261 T* operator-=(ptrdiff_t op) volatile noexcept;
262 T* operator-=(ptrdiff_t op) noexcept;
268 atomic_is_lock_free(const volatile atomic<T>* obj) noexcept;
272 atomic_is_lock_free(const atomic<T>* obj) noexcept;
276 atomic_init(volatile atomic<T>* obj, T desr) noexcept;
280 atomic_init(atomic<T>* obj, T desr) noexcept;
284 atomic_store(volatile atomic<T>* obj, T desr) noexcept;
288 atomic_store(atomic<T>* obj, T desr) noexcept;
292 atomic_store_explicit(volatile atomic<T>* obj, T desr, memory_order m) noexcept;
296 atomic_store_explicit(atomic<T>* obj, T desr, memory_order m) noexcept;
300 atomic_load(const volatile atomic<T>* obj) noexcept;
304 atomic_load(const atomic<T>* obj) noexcept;
308 atomic_load_explicit(const volatile atomic<T>* obj, memory_order m) noexcept;
312 atomic_load_explicit(const atomic<T>* obj, memory_order m) noexcept;
316 atomic_exchange(volatile atomic<T>* obj, T desr) noexcept;
320 atomic_exchange(atomic<T>* obj, T desr) noexcept;
324 atomic_exchange_explicit(volatile atomic<T>* obj, T desr, memory_order m) noexcept;
328 atomic_exchange_explicit(atomic<T>* obj, T desr, memory_order m) noexcept;
332 atomic_compare_exchange_weak(volatile atomic<T>* obj, T* expc, T desr) noexcept;
336 atomic_compare_exchange_weak(atomic<T>* obj, T* expc, T desr) noexcept;
340 atomic_compare_exchange_strong(volatile atomic<T>* obj, T* expc, T desr) noexcept;
344 atomic_compare_exchange_strong(atomic<T>* obj, T* expc, T desr) noexcept;
348 atomic_compare_exchange_weak_explicit(volatile atomic<T>* obj, T* expc,
350 memory_order s, memory_order f) noexcept;
354 atomic_compare_exchange_weak_explicit(atomic<T>* obj, T* expc, T desr,
355 memory_order s, memory_order f) noexcept;
359 atomic_compare_exchange_strong_explicit(volatile atomic<T>* obj,
361 memory_order s, memory_order f) noexcept;
365 atomic_compare_exchange_strong_explicit(atomic<T>* obj, T* expc,
367 memory_order s, memory_order f) noexcept;
369 template <class Integral>
371 atomic_fetch_add(volatile atomic<Integral>* obj, Integral op) noexcept;
373 template <class Integral>
375 atomic_fetch_add(atomic<Integral>* obj, Integral op) noexcept;
377 template <class Integral>
379 atomic_fetch_add_explicit(volatile atomic<Integral>* obj, Integral op,
380 memory_order m) noexcept;
381 template <class Integral>
383 atomic_fetch_add_explicit(atomic<Integral>* obj, Integral op,
384 memory_order m) noexcept;
385 template <class Integral>
387 atomic_fetch_sub(volatile atomic<Integral>* obj, Integral op) noexcept;
389 template <class Integral>
391 atomic_fetch_sub(atomic<Integral>* obj, Integral op) noexcept;
393 template <class Integral>
395 atomic_fetch_sub_explicit(volatile atomic<Integral>* obj, Integral op,
396 memory_order m) noexcept;
397 template <class Integral>
399 atomic_fetch_sub_explicit(atomic<Integral>* obj, Integral op,
400 memory_order m) noexcept;
401 template <class Integral>
403 atomic_fetch_and(volatile atomic<Integral>* obj, Integral op) noexcept;
405 template <class Integral>
407 atomic_fetch_and(atomic<Integral>* obj, Integral op) noexcept;
409 template <class Integral>
411 atomic_fetch_and_explicit(volatile atomic<Integral>* obj, Integral op,
412 memory_order m) noexcept;
413 template <class Integral>
415 atomic_fetch_and_explicit(atomic<Integral>* obj, Integral op,
416 memory_order m) noexcept;
417 template <class Integral>
419 atomic_fetch_or(volatile atomic<Integral>* obj, Integral op) noexcept;
421 template <class Integral>
423 atomic_fetch_or(atomic<Integral>* obj, Integral op) noexcept;
425 template <class Integral>
427 atomic_fetch_or_explicit(volatile atomic<Integral>* obj, Integral op,
428 memory_order m) noexcept;
429 template <class Integral>
431 atomic_fetch_or_explicit(atomic<Integral>* obj, Integral op,
432 memory_order m) noexcept;
433 template <class Integral>
435 atomic_fetch_xor(volatile atomic<Integral>* obj, Integral op) noexcept;
437 template <class Integral>
439 atomic_fetch_xor(atomic<Integral>* obj, Integral op) noexcept;
441 template <class Integral>
443 atomic_fetch_xor_explicit(volatile atomic<Integral>* obj, Integral op,
444 memory_order m) noexcept;
445 template <class Integral>
447 atomic_fetch_xor_explicit(atomic<Integral>* obj, Integral op,
448 memory_order m) noexcept;
452 atomic_fetch_add(volatile atomic<T*>* obj, ptrdiff_t op) noexcept;
456 atomic_fetch_add(atomic<T*>* obj, ptrdiff_t op) noexcept;
460 atomic_fetch_add_explicit(volatile atomic<T*>* obj, ptrdiff_t op,
461 memory_order m) noexcept;
464 atomic_fetch_add_explicit(atomic<T*>* obj, ptrdiff_t op, memory_order m) noexcept;
468 atomic_fetch_sub(volatile atomic<T*>* obj, ptrdiff_t op) noexcept;
472 atomic_fetch_sub(atomic<T*>* obj, ptrdiff_t op) noexcept;
476 atomic_fetch_sub_explicit(volatile atomic<T*>* obj, ptrdiff_t op,
477 memory_order m) noexcept;
480 atomic_fetch_sub_explicit(atomic<T*>* obj, ptrdiff_t op, memory_order m) noexcept;
482 // Atomics for standard typedef types
484 typedef atomic<bool> atomic_bool;
485 typedef atomic<char> atomic_char;
486 typedef atomic<signed char> atomic_schar;
487 typedef atomic<unsigned char> atomic_uchar;
488 typedef atomic<short> atomic_short;
489 typedef atomic<unsigned short> atomic_ushort;
490 typedef atomic<int> atomic_int;
491 typedef atomic<unsigned int> atomic_uint;
492 typedef atomic<long> atomic_long;
493 typedef atomic<unsigned long> atomic_ulong;
494 typedef atomic<long long> atomic_llong;
495 typedef atomic<unsigned long long> atomic_ullong;
496 typedef atomic<char16_t> atomic_char16_t;
497 typedef atomic<char32_t> atomic_char32_t;
498 typedef atomic<wchar_t> atomic_wchar_t;
500 typedef atomic<int_least8_t> atomic_int_least8_t;
501 typedef atomic<uint_least8_t> atomic_uint_least8_t;
502 typedef atomic<int_least16_t> atomic_int_least16_t;
503 typedef atomic<uint_least16_t> atomic_uint_least16_t;
504 typedef atomic<int_least32_t> atomic_int_least32_t;
505 typedef atomic<uint_least32_t> atomic_uint_least32_t;
506 typedef atomic<int_least64_t> atomic_int_least64_t;
507 typedef atomic<uint_least64_t> atomic_uint_least64_t;
509 typedef atomic<int_fast8_t> atomic_int_fast8_t;
510 typedef atomic<uint_fast8_t> atomic_uint_fast8_t;
511 typedef atomic<int_fast16_t> atomic_int_fast16_t;
512 typedef atomic<uint_fast16_t> atomic_uint_fast16_t;
513 typedef atomic<int_fast32_t> atomic_int_fast32_t;
514 typedef atomic<uint_fast32_t> atomic_uint_fast32_t;
515 typedef atomic<int_fast64_t> atomic_int_fast64_t;
516 typedef atomic<uint_fast64_t> atomic_uint_fast64_t;
518 typedef atomic<int8_t> atomic_int8_t;
519 typedef atomic<uint8_t> atomic_uint8_t;
520 typedef atomic<int16_t> atomic_int16_t;
521 typedef atomic<uint16_t> atomic_uint16_t;
522 typedef atomic<int32_t> atomic_int32_t;
523 typedef atomic<uint32_t> atomic_uint32_t;
524 typedef atomic<int64_t> atomic_int64_t;
525 typedef atomic<uint64_t> atomic_uint64_t;
527 typedef atomic<intptr_t> atomic_intptr_t;
528 typedef atomic<uintptr_t> atomic_uintptr_t;
529 typedef atomic<size_t> atomic_size_t;
530 typedef atomic<ptrdiff_t> atomic_ptrdiff_t;
531 typedef atomic<intmax_t> atomic_intmax_t;
532 typedef atomic<uintmax_t> atomic_uintmax_t;
536 void atomic_thread_fence(memory_order m) noexcept;
537 void atomic_signal_fence(memory_order m) noexcept;
546 #include <type_traits>
548 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
549 #pragma GCC system_header
552 #ifdef _LIBCPP_HAS_NO_THREADS
553 #error <atomic> is not supported on this single threaded system
555 #if !defined(_LIBCPP_HAS_C_ATOMIC_IMP) && !defined(_LIBCPP_HAS_GCC_ATOMIC_IMP)
556 #error <atomic> is not implemented
559 #if _LIBCPP_STD_VER > 14
560 # define __cpp_lib_atomic_is_always_lock_free 201603L
563 _LIBCPP_BEGIN_NAMESPACE_STD
565 typedef enum memory_order
567 memory_order_relaxed, memory_order_consume, memory_order_acquire,
568 memory_order_release, memory_order_acq_rel, memory_order_seq_cst
571 #if defined(_LIBCPP_HAS_GCC_ATOMIC_IMP)
572 namespace __gcc_atomic {
573 template <typename _Tp>
574 struct __gcc_atomic_t {
577 static_assert(is_trivially_copyable<_Tp>::value,
578 "std::atomic<Tp> requires that 'Tp' be a trivially copyable type");
581 _LIBCPP_INLINE_VISIBILITY
582 #ifndef _LIBCPP_CXX03_LANG
583 __gcc_atomic_t() _NOEXCEPT = default;
585 __gcc_atomic_t() _NOEXCEPT : __a_value() {}
586 #endif // _LIBCPP_CXX03_LANG
587 _LIBCPP_CONSTEXPR explicit __gcc_atomic_t(_Tp value) _NOEXCEPT
588 : __a_value(value) {}
591 #define _Atomic(x) __gcc_atomic::__gcc_atomic_t<x>
593 template <typename _Tp> _Tp __create();
595 template <typename _Tp, typename _Td>
596 typename enable_if<sizeof(_Tp()->__a_value = __create<_Td>()), char>::type
597 __test_atomic_assignable(int);
598 template <typename _Tp, typename _Up>
599 __two __test_atomic_assignable(...);
601 template <typename _Tp, typename _Td>
602 struct __can_assign {
603 static const bool value =
604 sizeof(__test_atomic_assignable<_Tp, _Td>(1)) == sizeof(char);
607 static inline _LIBCPP_CONSTEXPR int __to_gcc_order(memory_order __order) {
608 // Avoid switch statement to make this a constexpr.
609 return __order == memory_order_relaxed ? __ATOMIC_RELAXED:
610 (__order == memory_order_acquire ? __ATOMIC_ACQUIRE:
611 (__order == memory_order_release ? __ATOMIC_RELEASE:
612 (__order == memory_order_seq_cst ? __ATOMIC_SEQ_CST:
613 (__order == memory_order_acq_rel ? __ATOMIC_ACQ_REL:
614 __ATOMIC_CONSUME))));
617 static inline _LIBCPP_CONSTEXPR int __to_gcc_failure_order(memory_order __order) {
618 // Avoid switch statement to make this a constexpr.
619 return __order == memory_order_relaxed ? __ATOMIC_RELAXED:
620 (__order == memory_order_acquire ? __ATOMIC_ACQUIRE:
621 (__order == memory_order_release ? __ATOMIC_RELAXED:
622 (__order == memory_order_seq_cst ? __ATOMIC_SEQ_CST:
623 (__order == memory_order_acq_rel ? __ATOMIC_ACQUIRE:
624 __ATOMIC_CONSUME))));
627 } // namespace __gcc_atomic
629 template <typename _Tp>
632 __gcc_atomic::__can_assign<volatile _Atomic(_Tp)*, _Tp>::value>::type
633 __c11_atomic_init(volatile _Atomic(_Tp)* __a, _Tp __val) {
634 __a->__a_value = __val;
637 template <typename _Tp>
640 !__gcc_atomic::__can_assign<volatile _Atomic(_Tp)*, _Tp>::value &&
641 __gcc_atomic::__can_assign< _Atomic(_Tp)*, _Tp>::value>::type
642 __c11_atomic_init(volatile _Atomic(_Tp)* __a, _Tp __val) {
643 // [atomics.types.generic]p1 guarantees _Tp is trivially copyable. Because
644 // the default operator= in an object is not volatile, a byte-by-byte copy
646 volatile char* to = reinterpret_cast<volatile char*>(&__a->__a_value);
647 volatile char* end = to + sizeof(_Tp);
648 char* from = reinterpret_cast<char*>(&__val);
654 template <typename _Tp>
655 static inline void __c11_atomic_init(_Atomic(_Tp)* __a, _Tp __val) {
656 __a->__a_value = __val;
659 static inline void __c11_atomic_thread_fence(memory_order __order) {
660 __atomic_thread_fence(__gcc_atomic::__to_gcc_order(__order));
663 static inline void __c11_atomic_signal_fence(memory_order __order) {
664 __atomic_signal_fence(__gcc_atomic::__to_gcc_order(__order));
667 template <typename _Tp>
668 static inline void __c11_atomic_store(volatile _Atomic(_Tp)* __a, _Tp __val,
669 memory_order __order) {
670 return __atomic_store(&__a->__a_value, &__val,
671 __gcc_atomic::__to_gcc_order(__order));
674 template <typename _Tp>
675 static inline void __c11_atomic_store(_Atomic(_Tp)* __a, _Tp __val,
676 memory_order __order) {
677 __atomic_store(&__a->__a_value, &__val,
678 __gcc_atomic::__to_gcc_order(__order));
681 template <typename _Tp>
682 static inline _Tp __c11_atomic_load(volatile _Atomic(_Tp)* __a,
683 memory_order __order) {
685 __atomic_load(&__a->__a_value, &__ret,
686 __gcc_atomic::__to_gcc_order(__order));
690 template <typename _Tp>
691 static inline _Tp __c11_atomic_load(_Atomic(_Tp)* __a, memory_order __order) {
693 __atomic_load(&__a->__a_value, &__ret,
694 __gcc_atomic::__to_gcc_order(__order));
698 template <typename _Tp>
699 static inline _Tp __c11_atomic_exchange(volatile _Atomic(_Tp)* __a,
700 _Tp __value, memory_order __order) {
702 __atomic_exchange(&__a->__a_value, &__value, &__ret,
703 __gcc_atomic::__to_gcc_order(__order));
707 template <typename _Tp>
708 static inline _Tp __c11_atomic_exchange(_Atomic(_Tp)* __a, _Tp __value,
709 memory_order __order) {
711 __atomic_exchange(&__a->__a_value, &__value, &__ret,
712 __gcc_atomic::__to_gcc_order(__order));
716 template <typename _Tp>
717 static inline bool __c11_atomic_compare_exchange_strong(
718 volatile _Atomic(_Tp)* __a, _Tp* __expected, _Tp __value,
719 memory_order __success, memory_order __failure) {
720 return __atomic_compare_exchange(&__a->__a_value, __expected, &__value,
722 __gcc_atomic::__to_gcc_order(__success),
723 __gcc_atomic::__to_gcc_failure_order(__failure));
726 template <typename _Tp>
727 static inline bool __c11_atomic_compare_exchange_strong(
728 _Atomic(_Tp)* __a, _Tp* __expected, _Tp __value, memory_order __success,
729 memory_order __failure) {
730 return __atomic_compare_exchange(&__a->__a_value, __expected, &__value,
732 __gcc_atomic::__to_gcc_order(__success),
733 __gcc_atomic::__to_gcc_failure_order(__failure));
736 template <typename _Tp>
737 static inline bool __c11_atomic_compare_exchange_weak(
738 volatile _Atomic(_Tp)* __a, _Tp* __expected, _Tp __value,
739 memory_order __success, memory_order __failure) {
740 return __atomic_compare_exchange(&__a->__a_value, __expected, &__value,
742 __gcc_atomic::__to_gcc_order(__success),
743 __gcc_atomic::__to_gcc_failure_order(__failure));
746 template <typename _Tp>
747 static inline bool __c11_atomic_compare_exchange_weak(
748 _Atomic(_Tp)* __a, _Tp* __expected, _Tp __value, memory_order __success,
749 memory_order __failure) {
750 return __atomic_compare_exchange(&__a->__a_value, __expected, &__value,
752 __gcc_atomic::__to_gcc_order(__success),
753 __gcc_atomic::__to_gcc_failure_order(__failure));
756 template <typename _Tp>
757 struct __skip_amt { enum {value = 1}; };
759 template <typename _Tp>
760 struct __skip_amt<_Tp*> { enum {value = sizeof(_Tp)}; };
762 // FIXME: Haven't figured out what the spec says about using arrays with
763 // atomic_fetch_add. Force a failure rather than creating bad behavior.
764 template <typename _Tp>
765 struct __skip_amt<_Tp[]> { };
766 template <typename _Tp, int n>
767 struct __skip_amt<_Tp[n]> { };
769 template <typename _Tp, typename _Td>
770 static inline _Tp __c11_atomic_fetch_add(volatile _Atomic(_Tp)* __a,
771 _Td __delta, memory_order __order) {
772 return __atomic_fetch_add(&__a->__a_value, __delta * __skip_amt<_Tp>::value,
773 __gcc_atomic::__to_gcc_order(__order));
776 template <typename _Tp, typename _Td>
777 static inline _Tp __c11_atomic_fetch_add(_Atomic(_Tp)* __a, _Td __delta,
778 memory_order __order) {
779 return __atomic_fetch_add(&__a->__a_value, __delta * __skip_amt<_Tp>::value,
780 __gcc_atomic::__to_gcc_order(__order));
783 template <typename _Tp, typename _Td>
784 static inline _Tp __c11_atomic_fetch_sub(volatile _Atomic(_Tp)* __a,
785 _Td __delta, memory_order __order) {
786 return __atomic_fetch_sub(&__a->__a_value, __delta * __skip_amt<_Tp>::value,
787 __gcc_atomic::__to_gcc_order(__order));
790 template <typename _Tp, typename _Td>
791 static inline _Tp __c11_atomic_fetch_sub(_Atomic(_Tp)* __a, _Td __delta,
792 memory_order __order) {
793 return __atomic_fetch_sub(&__a->__a_value, __delta * __skip_amt<_Tp>::value,
794 __gcc_atomic::__to_gcc_order(__order));
797 template <typename _Tp>
798 static inline _Tp __c11_atomic_fetch_and(volatile _Atomic(_Tp)* __a,
799 _Tp __pattern, memory_order __order) {
800 return __atomic_fetch_and(&__a->__a_value, __pattern,
801 __gcc_atomic::__to_gcc_order(__order));
804 template <typename _Tp>
805 static inline _Tp __c11_atomic_fetch_and(_Atomic(_Tp)* __a,
806 _Tp __pattern, memory_order __order) {
807 return __atomic_fetch_and(&__a->__a_value, __pattern,
808 __gcc_atomic::__to_gcc_order(__order));
811 template <typename _Tp>
812 static inline _Tp __c11_atomic_fetch_or(volatile _Atomic(_Tp)* __a,
813 _Tp __pattern, memory_order __order) {
814 return __atomic_fetch_or(&__a->__a_value, __pattern,
815 __gcc_atomic::__to_gcc_order(__order));
818 template <typename _Tp>
819 static inline _Tp __c11_atomic_fetch_or(_Atomic(_Tp)* __a, _Tp __pattern,
820 memory_order __order) {
821 return __atomic_fetch_or(&__a->__a_value, __pattern,
822 __gcc_atomic::__to_gcc_order(__order));
825 template <typename _Tp>
826 static inline _Tp __c11_atomic_fetch_xor(volatile _Atomic(_Tp)* __a,
827 _Tp __pattern, memory_order __order) {
828 return __atomic_fetch_xor(&__a->__a_value, __pattern,
829 __gcc_atomic::__to_gcc_order(__order));
832 template <typename _Tp>
833 static inline _Tp __c11_atomic_fetch_xor(_Atomic(_Tp)* __a, _Tp __pattern,
834 memory_order __order) {
835 return __atomic_fetch_xor(&__a->__a_value, __pattern,
836 __gcc_atomic::__to_gcc_order(__order));
838 #endif // _LIBCPP_HAS_GCC_ATOMIC_IMP
841 inline _LIBCPP_INLINE_VISIBILITY
843 kill_dependency(_Tp __y) _NOEXCEPT
848 #define ATOMIC_BOOL_LOCK_FREE __GCC_ATOMIC_BOOL_LOCK_FREE
849 #define ATOMIC_CHAR_LOCK_FREE __GCC_ATOMIC_CHAR_LOCK_FREE
850 #define ATOMIC_CHAR16_T_LOCK_FREE __GCC_ATOMIC_CHAR16_T_LOCK_FREE
851 #define ATOMIC_CHAR32_T_LOCK_FREE __GCC_ATOMIC_CHAR32_T_LOCK_FREE
852 #define ATOMIC_WCHAR_T_LOCK_FREE __GCC_ATOMIC_WCHAR_T_LOCK_FREE
853 #define ATOMIC_SHORT_LOCK_FREE __GCC_ATOMIC_SHORT_LOCK_FREE
854 #define ATOMIC_INT_LOCK_FREE __GCC_ATOMIC_INT_LOCK_FREE
855 #define ATOMIC_LONG_LOCK_FREE __GCC_ATOMIC_LONG_LOCK_FREE
856 #define ATOMIC_LLONG_LOCK_FREE __GCC_ATOMIC_LLONG_LOCK_FREE
857 #define ATOMIC_POINTER_LOCK_FREE __GCC_ATOMIC_POINTER_LOCK_FREE
861 template <class _Tp, bool = is_integral<_Tp>::value && !is_same<_Tp, bool>::value>
862 struct __atomic_base // false
864 mutable _Atomic(_Tp) __a_;
866 #if defined(__cpp_lib_atomic_is_always_lock_free)
867 static _LIBCPP_CONSTEXPR bool is_always_lock_free = __atomic_always_lock_free(sizeof(__a_), 0);
870 _LIBCPP_INLINE_VISIBILITY
871 bool is_lock_free() const volatile _NOEXCEPT
873 #if defined(_LIBCPP_HAS_C_ATOMIC_IMP)
874 return __c11_atomic_is_lock_free(sizeof(_Tp));
876 return __atomic_is_lock_free(sizeof(_Tp), 0);
879 _LIBCPP_INLINE_VISIBILITY
880 bool is_lock_free() const _NOEXCEPT
881 {return static_cast<__atomic_base const volatile*>(this)->is_lock_free();}
882 _LIBCPP_INLINE_VISIBILITY
883 void store(_Tp __d, memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT
884 {__c11_atomic_store(&__a_, __d, __m);}
885 _LIBCPP_INLINE_VISIBILITY
886 void store(_Tp __d, memory_order __m = memory_order_seq_cst) _NOEXCEPT
887 {__c11_atomic_store(&__a_, __d, __m);}
888 _LIBCPP_INLINE_VISIBILITY
889 _Tp load(memory_order __m = memory_order_seq_cst) const volatile _NOEXCEPT
890 {return __c11_atomic_load(&__a_, __m);}
891 _LIBCPP_INLINE_VISIBILITY
892 _Tp load(memory_order __m = memory_order_seq_cst) const _NOEXCEPT
893 {return __c11_atomic_load(&__a_, __m);}
894 _LIBCPP_INLINE_VISIBILITY
895 operator _Tp() const volatile _NOEXCEPT {return load();}
896 _LIBCPP_INLINE_VISIBILITY
897 operator _Tp() const _NOEXCEPT {return load();}
898 _LIBCPP_INLINE_VISIBILITY
899 _Tp exchange(_Tp __d, memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT
900 {return __c11_atomic_exchange(&__a_, __d, __m);}
901 _LIBCPP_INLINE_VISIBILITY
902 _Tp exchange(_Tp __d, memory_order __m = memory_order_seq_cst) _NOEXCEPT
903 {return __c11_atomic_exchange(&__a_, __d, __m);}
904 _LIBCPP_INLINE_VISIBILITY
905 bool compare_exchange_weak(_Tp& __e, _Tp __d,
906 memory_order __s, memory_order __f) volatile _NOEXCEPT
907 {return __c11_atomic_compare_exchange_weak(&__a_, &__e, __d, __s, __f);}
908 _LIBCPP_INLINE_VISIBILITY
909 bool compare_exchange_weak(_Tp& __e, _Tp __d,
910 memory_order __s, memory_order __f) _NOEXCEPT
911 {return __c11_atomic_compare_exchange_weak(&__a_, &__e, __d, __s, __f);}
912 _LIBCPP_INLINE_VISIBILITY
913 bool compare_exchange_strong(_Tp& __e, _Tp __d,
914 memory_order __s, memory_order __f) volatile _NOEXCEPT
915 {return __c11_atomic_compare_exchange_strong(&__a_, &__e, __d, __s, __f);}
916 _LIBCPP_INLINE_VISIBILITY
917 bool compare_exchange_strong(_Tp& __e, _Tp __d,
918 memory_order __s, memory_order __f) _NOEXCEPT
919 {return __c11_atomic_compare_exchange_strong(&__a_, &__e, __d, __s, __f);}
920 _LIBCPP_INLINE_VISIBILITY
921 bool compare_exchange_weak(_Tp& __e, _Tp __d,
922 memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT
923 {return __c11_atomic_compare_exchange_weak(&__a_, &__e, __d, __m, __m);}
924 _LIBCPP_INLINE_VISIBILITY
925 bool compare_exchange_weak(_Tp& __e, _Tp __d,
926 memory_order __m = memory_order_seq_cst) _NOEXCEPT
927 {return __c11_atomic_compare_exchange_weak(&__a_, &__e, __d, __m, __m);}
928 _LIBCPP_INLINE_VISIBILITY
929 bool compare_exchange_strong(_Tp& __e, _Tp __d,
930 memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT
931 {return __c11_atomic_compare_exchange_strong(&__a_, &__e, __d, __m, __m);}
932 _LIBCPP_INLINE_VISIBILITY
933 bool compare_exchange_strong(_Tp& __e, _Tp __d,
934 memory_order __m = memory_order_seq_cst) _NOEXCEPT
935 {return __c11_atomic_compare_exchange_strong(&__a_, &__e, __d, __m, __m);}
937 _LIBCPP_INLINE_VISIBILITY
938 #ifndef _LIBCPP_CXX03_LANG
939 __atomic_base() _NOEXCEPT = default;
941 __atomic_base() _NOEXCEPT : __a_() {}
942 #endif // _LIBCPP_CXX03_LANG
944 _LIBCPP_INLINE_VISIBILITY
945 _LIBCPP_CONSTEXPR __atomic_base(_Tp __d) _NOEXCEPT : __a_(__d) {}
946 #ifndef _LIBCPP_CXX03_LANG
947 __atomic_base(const __atomic_base&) = delete;
948 __atomic_base& operator=(const __atomic_base&) = delete;
949 __atomic_base& operator=(const __atomic_base&) volatile = delete;
952 __atomic_base(const __atomic_base&);
953 __atomic_base& operator=(const __atomic_base&);
954 __atomic_base& operator=(const __atomic_base&) volatile;
958 #if defined(__cpp_lib_atomic_is_always_lock_free)
959 template <class _Tp, bool __b>
960 _LIBCPP_CONSTEXPR bool __atomic_base<_Tp, __b>::is_always_lock_free;
966 struct __atomic_base<_Tp, true>
967 : public __atomic_base<_Tp, false>
969 typedef __atomic_base<_Tp, false> __base;
970 _LIBCPP_INLINE_VISIBILITY
971 __atomic_base() _NOEXCEPT _LIBCPP_DEFAULT
972 _LIBCPP_INLINE_VISIBILITY
973 _LIBCPP_CONSTEXPR __atomic_base(_Tp __d) _NOEXCEPT : __base(__d) {}
975 _LIBCPP_INLINE_VISIBILITY
976 _Tp fetch_add(_Tp __op, memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT
977 {return __c11_atomic_fetch_add(&this->__a_, __op, __m);}
978 _LIBCPP_INLINE_VISIBILITY
979 _Tp fetch_add(_Tp __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT
980 {return __c11_atomic_fetch_add(&this->__a_, __op, __m);}
981 _LIBCPP_INLINE_VISIBILITY
982 _Tp fetch_sub(_Tp __op, memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT
983 {return __c11_atomic_fetch_sub(&this->__a_, __op, __m);}
984 _LIBCPP_INLINE_VISIBILITY
985 _Tp fetch_sub(_Tp __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT
986 {return __c11_atomic_fetch_sub(&this->__a_, __op, __m);}
987 _LIBCPP_INLINE_VISIBILITY
988 _Tp fetch_and(_Tp __op, memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT
989 {return __c11_atomic_fetch_and(&this->__a_, __op, __m);}
990 _LIBCPP_INLINE_VISIBILITY
991 _Tp fetch_and(_Tp __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT
992 {return __c11_atomic_fetch_and(&this->__a_, __op, __m);}
993 _LIBCPP_INLINE_VISIBILITY
994 _Tp fetch_or(_Tp __op, memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT
995 {return __c11_atomic_fetch_or(&this->__a_, __op, __m);}
996 _LIBCPP_INLINE_VISIBILITY
997 _Tp fetch_or(_Tp __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT
998 {return __c11_atomic_fetch_or(&this->__a_, __op, __m);}
999 _LIBCPP_INLINE_VISIBILITY
1000 _Tp fetch_xor(_Tp __op, memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT
1001 {return __c11_atomic_fetch_xor(&this->__a_, __op, __m);}
1002 _LIBCPP_INLINE_VISIBILITY
1003 _Tp fetch_xor(_Tp __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT
1004 {return __c11_atomic_fetch_xor(&this->__a_, __op, __m);}
1006 _LIBCPP_INLINE_VISIBILITY
1007 _Tp operator++(int) volatile _NOEXCEPT {return fetch_add(_Tp(1));}
1008 _LIBCPP_INLINE_VISIBILITY
1009 _Tp operator++(int) _NOEXCEPT {return fetch_add(_Tp(1));}
1010 _LIBCPP_INLINE_VISIBILITY
1011 _Tp operator--(int) volatile _NOEXCEPT {return fetch_sub(_Tp(1));}
1012 _LIBCPP_INLINE_VISIBILITY
1013 _Tp operator--(int) _NOEXCEPT {return fetch_sub(_Tp(1));}
1014 _LIBCPP_INLINE_VISIBILITY
1015 _Tp operator++() volatile _NOEXCEPT {return fetch_add(_Tp(1)) + _Tp(1);}
1016 _LIBCPP_INLINE_VISIBILITY
1017 _Tp operator++() _NOEXCEPT {return fetch_add(_Tp(1)) + _Tp(1);}
1018 _LIBCPP_INLINE_VISIBILITY
1019 _Tp operator--() volatile _NOEXCEPT {return fetch_sub(_Tp(1)) - _Tp(1);}
1020 _LIBCPP_INLINE_VISIBILITY
1021 _Tp operator--() _NOEXCEPT {return fetch_sub(_Tp(1)) - _Tp(1);}
1022 _LIBCPP_INLINE_VISIBILITY
1023 _Tp operator+=(_Tp __op) volatile _NOEXCEPT {return fetch_add(__op) + __op;}
1024 _LIBCPP_INLINE_VISIBILITY
1025 _Tp operator+=(_Tp __op) _NOEXCEPT {return fetch_add(__op) + __op;}
1026 _LIBCPP_INLINE_VISIBILITY
1027 _Tp operator-=(_Tp __op) volatile _NOEXCEPT {return fetch_sub(__op) - __op;}
1028 _LIBCPP_INLINE_VISIBILITY
1029 _Tp operator-=(_Tp __op) _NOEXCEPT {return fetch_sub(__op) - __op;}
1030 _LIBCPP_INLINE_VISIBILITY
1031 _Tp operator&=(_Tp __op) volatile _NOEXCEPT {return fetch_and(__op) & __op;}
1032 _LIBCPP_INLINE_VISIBILITY
1033 _Tp operator&=(_Tp __op) _NOEXCEPT {return fetch_and(__op) & __op;}
1034 _LIBCPP_INLINE_VISIBILITY
1035 _Tp operator|=(_Tp __op) volatile _NOEXCEPT {return fetch_or(__op) | __op;}
1036 _LIBCPP_INLINE_VISIBILITY
1037 _Tp operator|=(_Tp __op) _NOEXCEPT {return fetch_or(__op) | __op;}
1038 _LIBCPP_INLINE_VISIBILITY
1039 _Tp operator^=(_Tp __op) volatile _NOEXCEPT {return fetch_xor(__op) ^ __op;}
1040 _LIBCPP_INLINE_VISIBILITY
1041 _Tp operator^=(_Tp __op) _NOEXCEPT {return fetch_xor(__op) ^ __op;}
1046 template <class _Tp>
1048 : public __atomic_base<_Tp>
1050 typedef __atomic_base<_Tp> __base;
1051 _LIBCPP_INLINE_VISIBILITY
1052 atomic() _NOEXCEPT _LIBCPP_DEFAULT
1053 _LIBCPP_INLINE_VISIBILITY
1054 _LIBCPP_CONSTEXPR atomic(_Tp __d) _NOEXCEPT : __base(__d) {}
1056 _LIBCPP_INLINE_VISIBILITY
1057 _Tp operator=(_Tp __d) volatile _NOEXCEPT
1058 {__base::store(__d); return __d;}
1059 _LIBCPP_INLINE_VISIBILITY
1060 _Tp operator=(_Tp __d) _NOEXCEPT
1061 {__base::store(__d); return __d;}
1066 template <class _Tp>
1068 : public __atomic_base<_Tp*>
1070 typedef __atomic_base<_Tp*> __base;
1071 _LIBCPP_INLINE_VISIBILITY
1072 atomic() _NOEXCEPT _LIBCPP_DEFAULT
1073 _LIBCPP_INLINE_VISIBILITY
1074 _LIBCPP_CONSTEXPR atomic(_Tp* __d) _NOEXCEPT : __base(__d) {}
1076 _LIBCPP_INLINE_VISIBILITY
1077 _Tp* operator=(_Tp* __d) volatile _NOEXCEPT
1078 {__base::store(__d); return __d;}
1079 _LIBCPP_INLINE_VISIBILITY
1080 _Tp* operator=(_Tp* __d) _NOEXCEPT
1081 {__base::store(__d); return __d;}
1083 _LIBCPP_INLINE_VISIBILITY
1084 _Tp* fetch_add(ptrdiff_t __op, memory_order __m = memory_order_seq_cst)
1086 {return __c11_atomic_fetch_add(&this->__a_, __op, __m);}
1087 _LIBCPP_INLINE_VISIBILITY
1088 _Tp* fetch_add(ptrdiff_t __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT
1089 {return __c11_atomic_fetch_add(&this->__a_, __op, __m);}
1090 _LIBCPP_INLINE_VISIBILITY
1091 _Tp* fetch_sub(ptrdiff_t __op, memory_order __m = memory_order_seq_cst)
1093 {return __c11_atomic_fetch_sub(&this->__a_, __op, __m);}
1094 _LIBCPP_INLINE_VISIBILITY
1095 _Tp* fetch_sub(ptrdiff_t __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT
1096 {return __c11_atomic_fetch_sub(&this->__a_, __op, __m);}
1098 _LIBCPP_INLINE_VISIBILITY
1099 _Tp* operator++(int) volatile _NOEXCEPT {return fetch_add(1);}
1100 _LIBCPP_INLINE_VISIBILITY
1101 _Tp* operator++(int) _NOEXCEPT {return fetch_add(1);}
1102 _LIBCPP_INLINE_VISIBILITY
1103 _Tp* operator--(int) volatile _NOEXCEPT {return fetch_sub(1);}
1104 _LIBCPP_INLINE_VISIBILITY
1105 _Tp* operator--(int) _NOEXCEPT {return fetch_sub(1);}
1106 _LIBCPP_INLINE_VISIBILITY
1107 _Tp* operator++() volatile _NOEXCEPT {return fetch_add(1) + 1;}
1108 _LIBCPP_INLINE_VISIBILITY
1109 _Tp* operator++() _NOEXCEPT {return fetch_add(1) + 1;}
1110 _LIBCPP_INLINE_VISIBILITY
1111 _Tp* operator--() volatile _NOEXCEPT {return fetch_sub(1) - 1;}
1112 _LIBCPP_INLINE_VISIBILITY
1113 _Tp* operator--() _NOEXCEPT {return fetch_sub(1) - 1;}
1114 _LIBCPP_INLINE_VISIBILITY
1115 _Tp* operator+=(ptrdiff_t __op) volatile _NOEXCEPT {return fetch_add(__op) + __op;}
1116 _LIBCPP_INLINE_VISIBILITY
1117 _Tp* operator+=(ptrdiff_t __op) _NOEXCEPT {return fetch_add(__op) + __op;}
1118 _LIBCPP_INLINE_VISIBILITY
1119 _Tp* operator-=(ptrdiff_t __op) volatile _NOEXCEPT {return fetch_sub(__op) - __op;}
1120 _LIBCPP_INLINE_VISIBILITY
1121 _Tp* operator-=(ptrdiff_t __op) _NOEXCEPT {return fetch_sub(__op) - __op;}
1124 // atomic_is_lock_free
1126 template <class _Tp>
1127 inline _LIBCPP_INLINE_VISIBILITY
1129 atomic_is_lock_free(const volatile atomic<_Tp>* __o) _NOEXCEPT
1131 return __o->is_lock_free();
1134 template <class _Tp>
1135 inline _LIBCPP_INLINE_VISIBILITY
1137 atomic_is_lock_free(const atomic<_Tp>* __o) _NOEXCEPT
1139 return __o->is_lock_free();
1144 template <class _Tp>
1145 inline _LIBCPP_INLINE_VISIBILITY
1147 atomic_init(volatile atomic<_Tp>* __o, _Tp __d) _NOEXCEPT
1149 __c11_atomic_init(&__o->__a_, __d);
1152 template <class _Tp>
1153 inline _LIBCPP_INLINE_VISIBILITY
1155 atomic_init(atomic<_Tp>* __o, _Tp __d) _NOEXCEPT
1157 __c11_atomic_init(&__o->__a_, __d);
1162 template <class _Tp>
1163 inline _LIBCPP_INLINE_VISIBILITY
1165 atomic_store(volatile atomic<_Tp>* __o, _Tp __d) _NOEXCEPT
1170 template <class _Tp>
1171 inline _LIBCPP_INLINE_VISIBILITY
1173 atomic_store(atomic<_Tp>* __o, _Tp __d) _NOEXCEPT
1178 // atomic_store_explicit
1180 template <class _Tp>
1181 inline _LIBCPP_INLINE_VISIBILITY
1183 atomic_store_explicit(volatile atomic<_Tp>* __o, _Tp __d, memory_order __m) _NOEXCEPT
1185 __o->store(__d, __m);
1188 template <class _Tp>
1189 inline _LIBCPP_INLINE_VISIBILITY
1191 atomic_store_explicit(atomic<_Tp>* __o, _Tp __d, memory_order __m) _NOEXCEPT
1193 __o->store(__d, __m);
1198 template <class _Tp>
1199 inline _LIBCPP_INLINE_VISIBILITY
1201 atomic_load(const volatile atomic<_Tp>* __o) _NOEXCEPT
1206 template <class _Tp>
1207 inline _LIBCPP_INLINE_VISIBILITY
1209 atomic_load(const atomic<_Tp>* __o) _NOEXCEPT
1214 // atomic_load_explicit
1216 template <class _Tp>
1217 inline _LIBCPP_INLINE_VISIBILITY
1219 atomic_load_explicit(const volatile atomic<_Tp>* __o, memory_order __m) _NOEXCEPT
1221 return __o->load(__m);
1224 template <class _Tp>
1225 inline _LIBCPP_INLINE_VISIBILITY
1227 atomic_load_explicit(const atomic<_Tp>* __o, memory_order __m) _NOEXCEPT
1229 return __o->load(__m);
1234 template <class _Tp>
1235 inline _LIBCPP_INLINE_VISIBILITY
1237 atomic_exchange(volatile atomic<_Tp>* __o, _Tp __d) _NOEXCEPT
1239 return __o->exchange(__d);
1242 template <class _Tp>
1243 inline _LIBCPP_INLINE_VISIBILITY
1245 atomic_exchange(atomic<_Tp>* __o, _Tp __d) _NOEXCEPT
1247 return __o->exchange(__d);
1250 // atomic_exchange_explicit
1252 template <class _Tp>
1253 inline _LIBCPP_INLINE_VISIBILITY
1255 atomic_exchange_explicit(volatile atomic<_Tp>* __o, _Tp __d, memory_order __m) _NOEXCEPT
1257 return __o->exchange(__d, __m);
1260 template <class _Tp>
1261 inline _LIBCPP_INLINE_VISIBILITY
1263 atomic_exchange_explicit(atomic<_Tp>* __o, _Tp __d, memory_order __m) _NOEXCEPT
1265 return __o->exchange(__d, __m);
1268 // atomic_compare_exchange_weak
1270 template <class _Tp>
1271 inline _LIBCPP_INLINE_VISIBILITY
1273 atomic_compare_exchange_weak(volatile atomic<_Tp>* __o, _Tp* __e, _Tp __d) _NOEXCEPT
1275 return __o->compare_exchange_weak(*__e, __d);
1278 template <class _Tp>
1279 inline _LIBCPP_INLINE_VISIBILITY
1281 atomic_compare_exchange_weak(atomic<_Tp>* __o, _Tp* __e, _Tp __d) _NOEXCEPT
1283 return __o->compare_exchange_weak(*__e, __d);
1286 // atomic_compare_exchange_strong
1288 template <class _Tp>
1289 inline _LIBCPP_INLINE_VISIBILITY
1291 atomic_compare_exchange_strong(volatile atomic<_Tp>* __o, _Tp* __e, _Tp __d) _NOEXCEPT
1293 return __o->compare_exchange_strong(*__e, __d);
1296 template <class _Tp>
1297 inline _LIBCPP_INLINE_VISIBILITY
1299 atomic_compare_exchange_strong(atomic<_Tp>* __o, _Tp* __e, _Tp __d) _NOEXCEPT
1301 return __o->compare_exchange_strong(*__e, __d);
1304 // atomic_compare_exchange_weak_explicit
1306 template <class _Tp>
1307 inline _LIBCPP_INLINE_VISIBILITY
1309 atomic_compare_exchange_weak_explicit(volatile atomic<_Tp>* __o, _Tp* __e,
1311 memory_order __s, memory_order __f) _NOEXCEPT
1313 return __o->compare_exchange_weak(*__e, __d, __s, __f);
1316 template <class _Tp>
1317 inline _LIBCPP_INLINE_VISIBILITY
1319 atomic_compare_exchange_weak_explicit(atomic<_Tp>* __o, _Tp* __e, _Tp __d,
1320 memory_order __s, memory_order __f) _NOEXCEPT
1322 return __o->compare_exchange_weak(*__e, __d, __s, __f);
1325 // atomic_compare_exchange_strong_explicit
1327 template <class _Tp>
1328 inline _LIBCPP_INLINE_VISIBILITY
1330 atomic_compare_exchange_strong_explicit(volatile atomic<_Tp>* __o,
1332 memory_order __s, memory_order __f) _NOEXCEPT
1334 return __o->compare_exchange_strong(*__e, __d, __s, __f);
1337 template <class _Tp>
1338 inline _LIBCPP_INLINE_VISIBILITY
1340 atomic_compare_exchange_strong_explicit(atomic<_Tp>* __o, _Tp* __e,
1342 memory_order __s, memory_order __f) _NOEXCEPT
1344 return __o->compare_exchange_strong(*__e, __d, __s, __f);
1349 template <class _Tp>
1350 inline _LIBCPP_INLINE_VISIBILITY
1353 is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
1356 atomic_fetch_add(volatile atomic<_Tp>* __o, _Tp __op) _NOEXCEPT
1358 return __o->fetch_add(__op);
1361 template <class _Tp>
1362 inline _LIBCPP_INLINE_VISIBILITY
1365 is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
1368 atomic_fetch_add(atomic<_Tp>* __o, _Tp __op) _NOEXCEPT
1370 return __o->fetch_add(__op);
1373 template <class _Tp>
1374 inline _LIBCPP_INLINE_VISIBILITY
1376 atomic_fetch_add(volatile atomic<_Tp*>* __o, ptrdiff_t __op) _NOEXCEPT
1378 return __o->fetch_add(__op);
1381 template <class _Tp>
1382 inline _LIBCPP_INLINE_VISIBILITY
1384 atomic_fetch_add(atomic<_Tp*>* __o, ptrdiff_t __op) _NOEXCEPT
1386 return __o->fetch_add(__op);
1389 // atomic_fetch_add_explicit
1391 template <class _Tp>
1392 inline _LIBCPP_INLINE_VISIBILITY
1395 is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
1398 atomic_fetch_add_explicit(volatile atomic<_Tp>* __o, _Tp __op, memory_order __m) _NOEXCEPT
1400 return __o->fetch_add(__op, __m);
1403 template <class _Tp>
1404 inline _LIBCPP_INLINE_VISIBILITY
1407 is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
1410 atomic_fetch_add_explicit(atomic<_Tp>* __o, _Tp __op, memory_order __m) _NOEXCEPT
1412 return __o->fetch_add(__op, __m);
1415 template <class _Tp>
1416 inline _LIBCPP_INLINE_VISIBILITY
1418 atomic_fetch_add_explicit(volatile atomic<_Tp*>* __o, ptrdiff_t __op,
1419 memory_order __m) _NOEXCEPT
1421 return __o->fetch_add(__op, __m);
1424 template <class _Tp>
1425 inline _LIBCPP_INLINE_VISIBILITY
1427 atomic_fetch_add_explicit(atomic<_Tp*>* __o, ptrdiff_t __op, memory_order __m) _NOEXCEPT
1429 return __o->fetch_add(__op, __m);
1434 template <class _Tp>
1435 inline _LIBCPP_INLINE_VISIBILITY
1438 is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
1441 atomic_fetch_sub(volatile atomic<_Tp>* __o, _Tp __op) _NOEXCEPT
1443 return __o->fetch_sub(__op);
1446 template <class _Tp>
1447 inline _LIBCPP_INLINE_VISIBILITY
1450 is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
1453 atomic_fetch_sub(atomic<_Tp>* __o, _Tp __op) _NOEXCEPT
1455 return __o->fetch_sub(__op);
1458 template <class _Tp>
1459 inline _LIBCPP_INLINE_VISIBILITY
1461 atomic_fetch_sub(volatile atomic<_Tp*>* __o, ptrdiff_t __op) _NOEXCEPT
1463 return __o->fetch_sub(__op);
1466 template <class _Tp>
1467 inline _LIBCPP_INLINE_VISIBILITY
1469 atomic_fetch_sub(atomic<_Tp*>* __o, ptrdiff_t __op) _NOEXCEPT
1471 return __o->fetch_sub(__op);
1474 // atomic_fetch_sub_explicit
1476 template <class _Tp>
1477 inline _LIBCPP_INLINE_VISIBILITY
1480 is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
1483 atomic_fetch_sub_explicit(volatile atomic<_Tp>* __o, _Tp __op, memory_order __m) _NOEXCEPT
1485 return __o->fetch_sub(__op, __m);
1488 template <class _Tp>
1489 inline _LIBCPP_INLINE_VISIBILITY
1492 is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
1495 atomic_fetch_sub_explicit(atomic<_Tp>* __o, _Tp __op, memory_order __m) _NOEXCEPT
1497 return __o->fetch_sub(__op, __m);
1500 template <class _Tp>
1501 inline _LIBCPP_INLINE_VISIBILITY
1503 atomic_fetch_sub_explicit(volatile atomic<_Tp*>* __o, ptrdiff_t __op,
1504 memory_order __m) _NOEXCEPT
1506 return __o->fetch_sub(__op, __m);
1509 template <class _Tp>
1510 inline _LIBCPP_INLINE_VISIBILITY
1512 atomic_fetch_sub_explicit(atomic<_Tp*>* __o, ptrdiff_t __op, memory_order __m) _NOEXCEPT
1514 return __o->fetch_sub(__op, __m);
1519 template <class _Tp>
1520 inline _LIBCPP_INLINE_VISIBILITY
1523 is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
1526 atomic_fetch_and(volatile atomic<_Tp>* __o, _Tp __op) _NOEXCEPT
1528 return __o->fetch_and(__op);
1531 template <class _Tp>
1532 inline _LIBCPP_INLINE_VISIBILITY
1535 is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
1538 atomic_fetch_and(atomic<_Tp>* __o, _Tp __op) _NOEXCEPT
1540 return __o->fetch_and(__op);
1543 // atomic_fetch_and_explicit
1545 template <class _Tp>
1546 inline _LIBCPP_INLINE_VISIBILITY
1549 is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
1552 atomic_fetch_and_explicit(volatile atomic<_Tp>* __o, _Tp __op, memory_order __m) _NOEXCEPT
1554 return __o->fetch_and(__op, __m);
1557 template <class _Tp>
1558 inline _LIBCPP_INLINE_VISIBILITY
1561 is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
1564 atomic_fetch_and_explicit(atomic<_Tp>* __o, _Tp __op, memory_order __m) _NOEXCEPT
1566 return __o->fetch_and(__op, __m);
1571 template <class _Tp>
1572 inline _LIBCPP_INLINE_VISIBILITY
1575 is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
1578 atomic_fetch_or(volatile atomic<_Tp>* __o, _Tp __op) _NOEXCEPT
1580 return __o->fetch_or(__op);
1583 template <class _Tp>
1584 inline _LIBCPP_INLINE_VISIBILITY
1587 is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
1590 atomic_fetch_or(atomic<_Tp>* __o, _Tp __op) _NOEXCEPT
1592 return __o->fetch_or(__op);
1595 // atomic_fetch_or_explicit
1597 template <class _Tp>
1598 inline _LIBCPP_INLINE_VISIBILITY
1601 is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
1604 atomic_fetch_or_explicit(volatile atomic<_Tp>* __o, _Tp __op, memory_order __m) _NOEXCEPT
1606 return __o->fetch_or(__op, __m);
1609 template <class _Tp>
1610 inline _LIBCPP_INLINE_VISIBILITY
1613 is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
1616 atomic_fetch_or_explicit(atomic<_Tp>* __o, _Tp __op, memory_order __m) _NOEXCEPT
1618 return __o->fetch_or(__op, __m);
1623 template <class _Tp>
1624 inline _LIBCPP_INLINE_VISIBILITY
1627 is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
1630 atomic_fetch_xor(volatile atomic<_Tp>* __o, _Tp __op) _NOEXCEPT
1632 return __o->fetch_xor(__op);
1635 template <class _Tp>
1636 inline _LIBCPP_INLINE_VISIBILITY
1639 is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
1642 atomic_fetch_xor(atomic<_Tp>* __o, _Tp __op) _NOEXCEPT
1644 return __o->fetch_xor(__op);
1647 // atomic_fetch_xor_explicit
1649 template <class _Tp>
1650 inline _LIBCPP_INLINE_VISIBILITY
1653 is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
1656 atomic_fetch_xor_explicit(volatile atomic<_Tp>* __o, _Tp __op, memory_order __m) _NOEXCEPT
1658 return __o->fetch_xor(__op, __m);
1661 template <class _Tp>
1662 inline _LIBCPP_INLINE_VISIBILITY
1665 is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
1668 atomic_fetch_xor_explicit(atomic<_Tp>* __o, _Tp __op, memory_order __m) _NOEXCEPT
1670 return __o->fetch_xor(__op, __m);
1673 // flag type and operations
1675 typedef struct atomic_flag
1679 _LIBCPP_INLINE_VISIBILITY
1680 bool test_and_set(memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT
1681 {return __c11_atomic_exchange(&__a_, true, __m);}
1682 _LIBCPP_INLINE_VISIBILITY
1683 bool test_and_set(memory_order __m = memory_order_seq_cst) _NOEXCEPT
1684 {return __c11_atomic_exchange(&__a_, true, __m);}
1685 _LIBCPP_INLINE_VISIBILITY
1686 void clear(memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT
1687 {__c11_atomic_store(&__a_, false, __m);}
1688 _LIBCPP_INLINE_VISIBILITY
1689 void clear(memory_order __m = memory_order_seq_cst) _NOEXCEPT
1690 {__c11_atomic_store(&__a_, false, __m);}
1692 _LIBCPP_INLINE_VISIBILITY
1693 #ifndef _LIBCPP_CXX03_LANG
1694 atomic_flag() _NOEXCEPT = default;
1696 atomic_flag() _NOEXCEPT : __a_() {}
1697 #endif // _LIBCPP_CXX03_LANG
1699 _LIBCPP_INLINE_VISIBILITY
1700 atomic_flag(bool __b) _NOEXCEPT : __a_(__b) {} // EXTENSION
1702 #ifndef _LIBCPP_CXX03_LANG
1703 atomic_flag(const atomic_flag&) = delete;
1704 atomic_flag& operator=(const atomic_flag&) = delete;
1705 atomic_flag& operator=(const atomic_flag&) volatile = delete;
1708 atomic_flag(const atomic_flag&);
1709 atomic_flag& operator=(const atomic_flag&);
1710 atomic_flag& operator=(const atomic_flag&) volatile;
1714 inline _LIBCPP_INLINE_VISIBILITY
1716 atomic_flag_test_and_set(volatile atomic_flag* __o) _NOEXCEPT
1718 return __o->test_and_set();
1721 inline _LIBCPP_INLINE_VISIBILITY
1723 atomic_flag_test_and_set(atomic_flag* __o) _NOEXCEPT
1725 return __o->test_and_set();
1728 inline _LIBCPP_INLINE_VISIBILITY
1730 atomic_flag_test_and_set_explicit(volatile atomic_flag* __o, memory_order __m) _NOEXCEPT
1732 return __o->test_and_set(__m);
1735 inline _LIBCPP_INLINE_VISIBILITY
1737 atomic_flag_test_and_set_explicit(atomic_flag* __o, memory_order __m) _NOEXCEPT
1739 return __o->test_and_set(__m);
1742 inline _LIBCPP_INLINE_VISIBILITY
1744 atomic_flag_clear(volatile atomic_flag* __o) _NOEXCEPT
1749 inline _LIBCPP_INLINE_VISIBILITY
1751 atomic_flag_clear(atomic_flag* __o) _NOEXCEPT
1756 inline _LIBCPP_INLINE_VISIBILITY
1758 atomic_flag_clear_explicit(volatile atomic_flag* __o, memory_order __m) _NOEXCEPT
1763 inline _LIBCPP_INLINE_VISIBILITY
1765 atomic_flag_clear_explicit(atomic_flag* __o, memory_order __m) _NOEXCEPT
1772 inline _LIBCPP_INLINE_VISIBILITY
1774 atomic_thread_fence(memory_order __m) _NOEXCEPT
1776 __c11_atomic_thread_fence(__m);
1779 inline _LIBCPP_INLINE_VISIBILITY
1781 atomic_signal_fence(memory_order __m) _NOEXCEPT
1783 __c11_atomic_signal_fence(__m);
1786 // Atomics for standard typedef types
1788 typedef atomic<bool> atomic_bool;
1789 typedef atomic<char> atomic_char;
1790 typedef atomic<signed char> atomic_schar;
1791 typedef atomic<unsigned char> atomic_uchar;
1792 typedef atomic<short> atomic_short;
1793 typedef atomic<unsigned short> atomic_ushort;
1794 typedef atomic<int> atomic_int;
1795 typedef atomic<unsigned int> atomic_uint;
1796 typedef atomic<long> atomic_long;
1797 typedef atomic<unsigned long> atomic_ulong;
1798 typedef atomic<long long> atomic_llong;
1799 typedef atomic<unsigned long long> atomic_ullong;
1800 typedef atomic<char16_t> atomic_char16_t;
1801 typedef atomic<char32_t> atomic_char32_t;
1802 typedef atomic<wchar_t> atomic_wchar_t;
1804 typedef atomic<int_least8_t> atomic_int_least8_t;
1805 typedef atomic<uint_least8_t> atomic_uint_least8_t;
1806 typedef atomic<int_least16_t> atomic_int_least16_t;
1807 typedef atomic<uint_least16_t> atomic_uint_least16_t;
1808 typedef atomic<int_least32_t> atomic_int_least32_t;
1809 typedef atomic<uint_least32_t> atomic_uint_least32_t;
1810 typedef atomic<int_least64_t> atomic_int_least64_t;
1811 typedef atomic<uint_least64_t> atomic_uint_least64_t;
1813 typedef atomic<int_fast8_t> atomic_int_fast8_t;
1814 typedef atomic<uint_fast8_t> atomic_uint_fast8_t;
1815 typedef atomic<int_fast16_t> atomic_int_fast16_t;
1816 typedef atomic<uint_fast16_t> atomic_uint_fast16_t;
1817 typedef atomic<int_fast32_t> atomic_int_fast32_t;
1818 typedef atomic<uint_fast32_t> atomic_uint_fast32_t;
1819 typedef atomic<int_fast64_t> atomic_int_fast64_t;
1820 typedef atomic<uint_fast64_t> atomic_uint_fast64_t;
1822 typedef atomic< int8_t> atomic_int8_t;
1823 typedef atomic<uint8_t> atomic_uint8_t;
1824 typedef atomic< int16_t> atomic_int16_t;
1825 typedef atomic<uint16_t> atomic_uint16_t;
1826 typedef atomic< int32_t> atomic_int32_t;
1827 typedef atomic<uint32_t> atomic_uint32_t;
1828 typedef atomic< int64_t> atomic_int64_t;
1829 typedef atomic<uint64_t> atomic_uint64_t;
1831 typedef atomic<intptr_t> atomic_intptr_t;
1832 typedef atomic<uintptr_t> atomic_uintptr_t;
1833 typedef atomic<size_t> atomic_size_t;
1834 typedef atomic<ptrdiff_t> atomic_ptrdiff_t;
1835 typedef atomic<intmax_t> atomic_intmax_t;
1836 typedef atomic<uintmax_t> atomic_uintmax_t;
1838 #define ATOMIC_FLAG_INIT {false}
1839 #define ATOMIC_VAR_INIT(__v) {__v}
1841 _LIBCPP_END_NAMESPACE_STD
1843 #endif // _LIBCPP_ATOMIC