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diff --git a/third_party/libcxx/include/c++/v1/atomic b/third_party/libcxx/include/c++/v1/atomic
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-// -*- C++ -*-
-//===----------------------------------------------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef _LIBCPP_ATOMIC
-#define _LIBCPP_ATOMIC
-
-/*
- atomic synopsis
-
-namespace std
-{
-
-// feature test macro [version.syn]
-
-#define __cpp_lib_atomic_is_always_lock_free
-#define __cpp_lib_atomic_flag_test
-#define __cpp_lib_atomic_lock_free_type_aliases
-#define __cpp_lib_atomic_wait
-
- // order and consistency
-
- enum memory_order: unspecified // enum class in C++20
- {
- relaxed,
- consume, // load-consume
- acquire, // load-acquire
- release, // store-release
- acq_rel, // store-release load-acquire
- seq_cst // store-release load-acquire
- };
-
- inline constexpr auto memory_order_relaxed = memory_order::relaxed;
- inline constexpr auto memory_order_consume = memory_order::consume;
- inline constexpr auto memory_order_acquire = memory_order::acquire;
- inline constexpr auto memory_order_release = memory_order::release;
- inline constexpr auto memory_order_acq_rel = memory_order::acq_rel;
- inline constexpr auto memory_order_seq_cst = memory_order::seq_cst;
-
-template <class T> T kill_dependency(T y) noexcept;
-
-// lock-free property
-
-#define ATOMIC_BOOL_LOCK_FREE unspecified
-#define ATOMIC_CHAR_LOCK_FREE unspecified
-#define ATOMIC_CHAR8_T_LOCK_FREE unspecified // C++20
-#define ATOMIC_CHAR16_T_LOCK_FREE unspecified
-#define ATOMIC_CHAR32_T_LOCK_FREE unspecified
-#define ATOMIC_WCHAR_T_LOCK_FREE unspecified
-#define ATOMIC_SHORT_LOCK_FREE unspecified
-#define ATOMIC_INT_LOCK_FREE unspecified
-#define ATOMIC_LONG_LOCK_FREE unspecified
-#define ATOMIC_LLONG_LOCK_FREE unspecified
-#define ATOMIC_POINTER_LOCK_FREE unspecified
-
-template <class T>
-struct atomic
-{
- using value_type = T;
-
- static constexpr bool is_always_lock_free;
- bool is_lock_free() const volatile noexcept;
- bool is_lock_free() const noexcept;
-
- atomic() noexcept = default; // until C++20
- constexpr atomic() noexcept(is_nothrow_default_constructible_v<T>); // since C++20
- constexpr atomic(T desr) noexcept;
- atomic(const atomic&) = delete;
- atomic& operator=(const atomic&) = delete;
- atomic& operator=(const atomic&) volatile = delete;
-
- T load(memory_order m = memory_order_seq_cst) const volatile noexcept;
- T load(memory_order m = memory_order_seq_cst) const noexcept;
- operator T() const volatile noexcept;
- operator T() const noexcept;
- void store(T desr, memory_order m = memory_order_seq_cst) volatile noexcept;
- void store(T desr, memory_order m = memory_order_seq_cst) noexcept;
- T operator=(T) volatile noexcept;
- T operator=(T) noexcept;
-
- T exchange(T desr, memory_order m = memory_order_seq_cst) volatile noexcept;
- T exchange(T desr, memory_order m = memory_order_seq_cst) noexcept;
- bool compare_exchange_weak(T& expc, T desr,
- memory_order s, memory_order f) volatile noexcept;
- bool compare_exchange_weak(T& expc, T desr, memory_order s, memory_order f) noexcept;
- bool compare_exchange_strong(T& expc, T desr,
- memory_order s, memory_order f) volatile noexcept;
- bool compare_exchange_strong(T& expc, T desr,
- memory_order s, memory_order f) noexcept;
- bool compare_exchange_weak(T& expc, T desr,
- memory_order m = memory_order_seq_cst) volatile noexcept;
- bool compare_exchange_weak(T& expc, T desr,
- memory_order m = memory_order_seq_cst) noexcept;
- bool compare_exchange_strong(T& expc, T desr,
- memory_order m = memory_order_seq_cst) volatile noexcept;
- bool compare_exchange_strong(T& expc, T desr,
- memory_order m = memory_order_seq_cst) noexcept;
-
- void wait(T, memory_order = memory_order::seq_cst) const volatile noexcept; // since C++20
- void wait(T, memory_order = memory_order::seq_cst) const noexcept; // since C++20
- void notify_one() volatile noexcept; // since C++20
- void notify_one() noexcept; // since C++20
- void notify_all() volatile noexcept; // since C++20
- void notify_all() noexcept; // since C++20
-};
-
-template <>
-struct atomic<integral>
-{
- using value_type = integral;
- using difference_type = value_type;
-
- static constexpr bool is_always_lock_free;
- bool is_lock_free() const volatile noexcept;
- bool is_lock_free() const noexcept;
-
- atomic() noexcept = default;
- constexpr atomic(integral desr) noexcept;
- atomic(const atomic&) = delete;
- atomic& operator=(const atomic&) = delete;
- atomic& operator=(const atomic&) volatile = delete;
-
- integral load(memory_order m = memory_order_seq_cst) const volatile noexcept;
- integral load(memory_order m = memory_order_seq_cst) const noexcept;
- operator integral() const volatile noexcept;
- operator integral() const noexcept;
- void store(integral desr, memory_order m = memory_order_seq_cst) volatile noexcept;
- void store(integral desr, memory_order m = memory_order_seq_cst) noexcept;
- integral operator=(integral desr) volatile noexcept;
- integral operator=(integral desr) noexcept;
-
- integral exchange(integral desr,
- memory_order m = memory_order_seq_cst) volatile noexcept;
- integral exchange(integral desr, memory_order m = memory_order_seq_cst) noexcept;
- bool compare_exchange_weak(integral& expc, integral desr,
- memory_order s, memory_order f) volatile noexcept;
- bool compare_exchange_weak(integral& expc, integral desr,
- memory_order s, memory_order f) noexcept;
- bool compare_exchange_strong(integral& expc, integral desr,
- memory_order s, memory_order f) volatile noexcept;
- bool compare_exchange_strong(integral& expc, integral desr,
- memory_order s, memory_order f) noexcept;
- bool compare_exchange_weak(integral& expc, integral desr,
- memory_order m = memory_order_seq_cst) volatile noexcept;
- bool compare_exchange_weak(integral& expc, integral desr,
- memory_order m = memory_order_seq_cst) noexcept;
- bool compare_exchange_strong(integral& expc, integral desr,
- memory_order m = memory_order_seq_cst) volatile noexcept;
- bool compare_exchange_strong(integral& expc, integral desr,
- memory_order m = memory_order_seq_cst) noexcept;
-
- integral fetch_add(integral op, memory_order m = memory_order_seq_cst) volatile noexcept;
- integral fetch_add(integral op, memory_order m = memory_order_seq_cst) noexcept;
- integral fetch_sub(integral op, memory_order m = memory_order_seq_cst) volatile noexcept;
- integral fetch_sub(integral op, memory_order m = memory_order_seq_cst) noexcept;
- integral fetch_and(integral op, memory_order m = memory_order_seq_cst) volatile noexcept;
- integral fetch_and(integral op, memory_order m = memory_order_seq_cst) noexcept;
- integral fetch_or(integral op, memory_order m = memory_order_seq_cst) volatile noexcept;
- integral fetch_or(integral op, memory_order m = memory_order_seq_cst) noexcept;
- integral fetch_xor(integral op, memory_order m = memory_order_seq_cst) volatile noexcept;
- integral fetch_xor(integral op, memory_order m = memory_order_seq_cst) noexcept;
-
- integral operator++(int) volatile noexcept;
- integral operator++(int) noexcept;
- integral operator--(int) volatile noexcept;
- integral operator--(int) noexcept;
- integral operator++() volatile noexcept;
- integral operator++() noexcept;
- integral operator--() volatile noexcept;
- integral operator--() noexcept;
- integral operator+=(integral op) volatile noexcept;
- integral operator+=(integral op) noexcept;
- integral operator-=(integral op) volatile noexcept;
- integral operator-=(integral op) noexcept;
- integral operator&=(integral op) volatile noexcept;
- integral operator&=(integral op) noexcept;
- integral operator|=(integral op) volatile noexcept;
- integral operator|=(integral op) noexcept;
- integral operator^=(integral op) volatile noexcept;
- integral operator^=(integral op) noexcept;
-
- void wait(integral, memory_order = memory_order::seq_cst) const volatile noexcept; // since C++20
- void wait(integral, memory_order = memory_order::seq_cst) const noexcept; // since C++20
- void notify_one() volatile noexcept; // since C++20
- void notify_one() noexcept; // since C++20
- void notify_all() volatile noexcept; // since C++20
- void notify_all() noexcept; // since C++20
-};
-
-template <class T>
-struct atomic<T*>
-{
- using value_type = T*;
- using difference_type = ptrdiff_t;
-
- static constexpr bool is_always_lock_free;
- bool is_lock_free() const volatile noexcept;
- bool is_lock_free() const noexcept;
-
- atomic() noexcept = default; // until C++20
- constexpr atomic() noexcept; // since C++20
- constexpr atomic(T* desr) noexcept;
- atomic(const atomic&) = delete;
- atomic& operator=(const atomic&) = delete;
- atomic& operator=(const atomic&) volatile = delete;
-
- T* load(memory_order m = memory_order_seq_cst) const volatile noexcept;
- T* load(memory_order m = memory_order_seq_cst) const noexcept;
- operator T*() const volatile noexcept;
- operator T*() const noexcept;
- void store(T* desr, memory_order m = memory_order_seq_cst) volatile noexcept;
- void store(T* desr, memory_order m = memory_order_seq_cst) noexcept;
- T* operator=(T*) volatile noexcept;
- T* operator=(T*) noexcept;
-
- T* exchange(T* desr, memory_order m = memory_order_seq_cst) volatile noexcept;
- T* exchange(T* desr, memory_order m = memory_order_seq_cst) noexcept;
- bool compare_exchange_weak(T*& expc, T* desr,
- memory_order s, memory_order f) volatile noexcept;
- bool compare_exchange_weak(T*& expc, T* desr,
- memory_order s, memory_order f) noexcept;
- bool compare_exchange_strong(T*& expc, T* desr,
- memory_order s, memory_order f) volatile noexcept;
- bool compare_exchange_strong(T*& expc, T* desr,
- memory_order s, memory_order f) noexcept;
- bool compare_exchange_weak(T*& expc, T* desr,
- memory_order m = memory_order_seq_cst) volatile noexcept;
- bool compare_exchange_weak(T*& expc, T* desr,
- memory_order m = memory_order_seq_cst) noexcept;
- bool compare_exchange_strong(T*& expc, T* desr,
- memory_order m = memory_order_seq_cst) volatile noexcept;
- bool compare_exchange_strong(T*& expc, T* desr,
- memory_order m = memory_order_seq_cst) noexcept;
- T* fetch_add(ptrdiff_t op, memory_order m = memory_order_seq_cst) volatile noexcept;
- T* fetch_add(ptrdiff_t op, memory_order m = memory_order_seq_cst) noexcept;
- T* fetch_sub(ptrdiff_t op, memory_order m = memory_order_seq_cst) volatile noexcept;
- T* fetch_sub(ptrdiff_t op, memory_order m = memory_order_seq_cst) noexcept;
-
- T* operator++(int) volatile noexcept;
- T* operator++(int) noexcept;
- T* operator--(int) volatile noexcept;
- T* operator--(int) noexcept;
- T* operator++() volatile noexcept;
- T* operator++() noexcept;
- T* operator--() volatile noexcept;
- T* operator--() noexcept;
- T* operator+=(ptrdiff_t op) volatile noexcept;
- T* operator+=(ptrdiff_t op) noexcept;
- T* operator-=(ptrdiff_t op) volatile noexcept;
- T* operator-=(ptrdiff_t op) noexcept;
-
- void wait(T*, memory_order = memory_order::seq_cst) const volatile noexcept; // since C++20
- void wait(T*, memory_order = memory_order::seq_cst) const noexcept; // since C++20
- void notify_one() volatile noexcept; // since C++20
- void notify_one() noexcept; // since C++20
- void notify_all() volatile noexcept; // since C++20
- void notify_all() noexcept; // since C++20
-};
-
-template<>
-struct atomic<floating-point-type> { // since C++20
- using value_type = floating-point-type;
- using difference_type = value_type;
-
- static constexpr bool is_always_lock_free = implementation-defined;
- bool is_lock_free() const volatile noexcept;
- bool is_lock_free() const noexcept;
-
- constexpr atomic() noexcept;
- constexpr atomic(floating-point-type) noexcept;
- atomic(const atomic&) = delete;
- atomic& operator=(const atomic&) = delete;
- atomic& operator=(const atomic&) volatile = delete;
-
- void store(floating-point-type, memory_order = memory_order::seq_cst) volatile noexcept;
- void store(floating-point-type, memory_order = memory_order::seq_cst) noexcept;
- floating-point-type operator=(floating-point-type) volatile noexcept;
- floating-point-type operator=(floating-point-type) noexcept;
- floating-point-type load(memory_order = memory_order::seq_cst) volatile noexcept;
- floating-point-type load(memory_order = memory_order::seq_cst) noexcept;
- operator floating-point-type() volatile noexcept;
- operator floating-point-type() noexcept;
-
- floating-point-type exchange(floating-point-type,
- memory_order = memory_order::seq_cst) volatile noexcept;
- floating-point-type exchange(floating-point-type,
- memory_order = memory_order::seq_cst) noexcept;
- bool compare_exchange_weak(floating-point-type&, floating-point-type,
- memory_order, memory_order) volatile noexcept;
- bool compare_exchange_weak(floating-point-type&, floating-point-type,
- memory_order, memory_order) noexcept;
- bool compare_exchange_strong(floating-point-type&, floating-point-type,
- memory_order, memory_order) volatile noexcept;
- bool compare_exchange_strong(floating-point-type&, floating-point-type,
- memory_order, memory_order) noexcept;
- bool compare_exchange_weak(floating-point-type&, floating-point-type,
- memory_order = memory_order::seq_cst) volatile noexcept;
- bool compare_exchange_weak(floating-point-type&, floating-point-type,
- memory_order = memory_order::seq_cst) noexcept;
- bool compare_exchange_strong(floating-point-type&, floating-point-type,
- memory_order = memory_order::seq_cst) volatile noexcept;
- bool compare_exchange_strong(floating-point-type&, floating-point-type,
- memory_order = memory_order::seq_cst) noexcept;
-
- floating-point-type fetch_add(floating-point-type,
- memory_order = memory_order::seq_cst) volatile noexcept;
- floating-point-type fetch_add(floating-point-type,
- memory_order = memory_order::seq_cst) noexcept;
- floating-point-type fetch_sub(floating-point-type,
- memory_order = memory_order::seq_cst) volatile noexcept;
- floating-point-type fetch_sub(floating-point-type,
- memory_order = memory_order::seq_cst) noexcept;
-
- floating-point-type operator+=(floating-point-type) volatile noexcept;
- floating-point-type operator+=(floating-point-type) noexcept;
- floating-point-type operator-=(floating-point-type) volatile noexcept;
- floating-point-type operator-=(floating-point-type) noexcept;
-
- void wait(floating-point-type, memory_order = memory_order::seq_cst) const volatile noexcept; // since C++20
- void wait(floating-point-type, memory_order = memory_order::seq_cst) const noexcept; // since C++20
- void notify_one() volatile noexcept; // since C++20
- void notify_one() noexcept; // since C++20
- void notify_all() volatile noexcept; // since C++20
- void notify_all() noexcept; // since C++20
-};
-
-// [atomics.nonmembers], non-member functions
-template<class T>
- bool atomic_is_lock_free(const volatile atomic<T>*) noexcept;
-template<class T>
- bool atomic_is_lock_free(const atomic<T>*) noexcept;
-template<class T>
- void atomic_store(volatile atomic<T>*, atomic<T>::value_type) noexcept;
-template<class T>
- void atomic_store(atomic<T>*, atomic<T>::value_type) noexcept;
-template<class T>
- void atomic_store_explicit(volatile atomic<T>*, atomic<T>::value_type,
- memory_order) noexcept;
-template<class T>
- void atomic_store_explicit(atomic<T>*, atomic<T>::value_type,
- memory_order) noexcept;
-template<class T>
- T atomic_load(const volatile atomic<T>*) noexcept;
-template<class T>
- T atomic_load(const atomic<T>*) noexcept;
-template<class T>
- T atomic_load_explicit(const volatile atomic<T>*, memory_order) noexcept;
-template<class T>
- T atomic_load_explicit(const atomic<T>*, memory_order) noexcept;
-template<class T>
- T atomic_exchange(volatile atomic<T>*, atomic<T>::value_type) noexcept;
-template<class T>
- T atomic_exchange(atomic<T>*, atomic<T>::value_type) noexcept;
-template<class T>
- T atomic_exchange_explicit(volatile atomic<T>*, atomic<T>::value_type,
- memory_order) noexcept;
-template<class T>
- T atomic_exchange_explicit(atomic<T>*, atomic<T>::value_type,
- memory_order) noexcept;
-template<class T>
- bool atomic_compare_exchange_weak(volatile atomic<T>*, atomic<T>::value_type*,
- atomic<T>::value_type) noexcept;
-template<class T>
- bool atomic_compare_exchange_weak(atomic<T>*, atomic<T>::value_type*,
- atomic<T>::value_type) noexcept;
-template<class T>
- bool atomic_compare_exchange_strong(volatile atomic<T>*, atomic<T>::value_type*,
- atomic<T>::value_type) noexcept;
-template<class T>
- bool atomic_compare_exchange_strong(atomic<T>*, atomic<T>::value_type*,
- atomic<T>::value_type) noexcept;
-template<class T>
- bool atomic_compare_exchange_weak_explicit(volatile atomic<T>*, atomic<T>::value_type*,
- atomic<T>::value_type,
- memory_order, memory_order) noexcept;
-template<class T>
- bool atomic_compare_exchange_weak_explicit(atomic<T>*, atomic<T>::value_type*,
- atomic<T>::value_type,
- memory_order, memory_order) noexcept;
-template<class T>
- bool atomic_compare_exchange_strong_explicit(volatile atomic<T>*, atomic<T>::value_type*,
- atomic<T>::value_type,
- memory_order, memory_order) noexcept;
-template<class T>
- bool atomic_compare_exchange_strong_explicit(atomic<T>*, atomic<T>::value_type*,
- atomic<T>::value_type,
- memory_order, memory_order) noexcept;
-
-template<class T>
- T atomic_fetch_add(volatile atomic<T>*, atomic<T>::difference_type) noexcept;
-template<class T>
- T atomic_fetch_add(atomic<T>*, atomic<T>::difference_type) noexcept;
-template<class T>
- T atomic_fetch_add_explicit(volatile atomic<T>*, atomic<T>::difference_type,
- memory_order) noexcept;
-template<class T>
- T atomic_fetch_add_explicit(atomic<T>*, atomic<T>::difference_type,
- memory_order) noexcept;
-template<class T>
- T atomic_fetch_sub(volatile atomic<T>*, atomic<T>::difference_type) noexcept;
-template<class T>
- T atomic_fetch_sub(atomic<T>*, atomic<T>::difference_type) noexcept;
-template<class T>
- T atomic_fetch_sub_explicit(volatile atomic<T>*, atomic<T>::difference_type,
- memory_order) noexcept;
-template<class T>
- T atomic_fetch_sub_explicit(atomic<T>*, atomic<T>::difference_type,
- memory_order) noexcept;
-template<class T>
- T atomic_fetch_and(volatile atomic<T>*, atomic<T>::value_type) noexcept;
-template<class T>
- T atomic_fetch_and(atomic<T>*, atomic<T>::value_type) noexcept;
-template<class T>
- T atomic_fetch_and_explicit(volatile atomic<T>*, atomic<T>::value_type,
- memory_order) noexcept;
-template<class T>
- T atomic_fetch_and_explicit(atomic<T>*, atomic<T>::value_type,
- memory_order) noexcept;
-template<class T>
- T atomic_fetch_or(volatile atomic<T>*, atomic<T>::value_type) noexcept;
-template<class T>
- T atomic_fetch_or(atomic<T>*, atomic<T>::value_type) noexcept;
-template<class T>
- T atomic_fetch_or_explicit(volatile atomic<T>*, atomic<T>::value_type,
- memory_order) noexcept;
-template<class T>
- T atomic_fetch_or_explicit(atomic<T>*, atomic<T>::value_type,
- memory_order) noexcept;
-template<class T>
- T atomic_fetch_xor(volatile atomic<T>*, atomic<T>::value_type) noexcept;
-template<class T>
- T atomic_fetch_xor(atomic<T>*, atomic<T>::value_type) noexcept;
-template<class T>
- T atomic_fetch_xor_explicit(volatile atomic<T>*, atomic<T>::value_type,
- memory_order) noexcept;
-template<class T>
- T atomic_fetch_xor_explicit(atomic<T>*, atomic<T>::value_type,
- memory_order) noexcept;
-
-template<class T>
- void atomic_wait(const volatile atomic<T>*, atomic<T>::value_type) noexcept; // since C++20
-template<class T>
- void atomic_wait(const atomic<T>*, atomic<T>::value_type) noexcept; // since C++20
-template<class T>
- void atomic_wait_explicit(const volatile atomic<T>*, atomic<T>::value_type, // since C++20
- memory_order) noexcept;
-template<class T>
- void atomic_wait_explicit(const atomic<T>*, atomic<T>::value_type, // since C++20
- memory_order) noexcept;
-template<class T>
- void atomic_notify_one(volatile atomic<T>*) noexcept; // since C++20
-template<class T>
- void atomic_notify_one(atomic<T>*) noexcept; // since C++20
-template<class T>
- void atomic_notify_all(volatile atomic<T>*) noexcept; // since C++20
-template<class T>
- void atomic_notify_all(atomic<T>*) noexcept; // since C++20
-
-// Atomics for standard typedef types
-
-typedef atomic<bool> atomic_bool;
-typedef atomic<char> atomic_char;
-typedef atomic<signed char> atomic_schar;
-typedef atomic<unsigned char> atomic_uchar;
-typedef atomic<short> atomic_short;
-typedef atomic<unsigned short> atomic_ushort;
-typedef atomic<int> atomic_int;
-typedef atomic<unsigned int> atomic_uint;
-typedef atomic<long> atomic_long;
-typedef atomic<unsigned long> atomic_ulong;
-typedef atomic<long long> atomic_llong;
-typedef atomic<unsigned long long> atomic_ullong;
-typedef atomic<char8_t> atomic_char8_t; // C++20
-typedef atomic<char16_t> atomic_char16_t;
-typedef atomic<char32_t> atomic_char32_t;
-typedef atomic<wchar_t> atomic_wchar_t;
-
-typedef atomic<int_least8_t> atomic_int_least8_t;
-typedef atomic<uint_least8_t> atomic_uint_least8_t;
-typedef atomic<int_least16_t> atomic_int_least16_t;
-typedef atomic<uint_least16_t> atomic_uint_least16_t;
-typedef atomic<int_least32_t> atomic_int_least32_t;
-typedef atomic<uint_least32_t> atomic_uint_least32_t;
-typedef atomic<int_least64_t> atomic_int_least64_t;
-typedef atomic<uint_least64_t> atomic_uint_least64_t;
-
-typedef atomic<int_fast8_t> atomic_int_fast8_t;
-typedef atomic<uint_fast8_t> atomic_uint_fast8_t;
-typedef atomic<int_fast16_t> atomic_int_fast16_t;
-typedef atomic<uint_fast16_t> atomic_uint_fast16_t;
-typedef atomic<int_fast32_t> atomic_int_fast32_t;
-typedef atomic<uint_fast32_t> atomic_uint_fast32_t;
-typedef atomic<int_fast64_t> atomic_int_fast64_t;
-typedef atomic<uint_fast64_t> atomic_uint_fast64_t;
-
-typedef atomic<int8_t> atomic_int8_t;
-typedef atomic<uint8_t> atomic_uint8_t;
-typedef atomic<int16_t> atomic_int16_t;
-typedef atomic<uint16_t> atomic_uint16_t;
-typedef atomic<int32_t> atomic_int32_t;
-typedef atomic<uint32_t> atomic_uint32_t;
-typedef atomic<int64_t> atomic_int64_t;
-typedef atomic<uint64_t> atomic_uint64_t;
-
-typedef atomic<intptr_t> atomic_intptr_t;
-typedef atomic<uintptr_t> atomic_uintptr_t;
-typedef atomic<size_t> atomic_size_t;
-typedef atomic<ptrdiff_t> atomic_ptrdiff_t;
-typedef atomic<intmax_t> atomic_intmax_t;
-typedef atomic<uintmax_t> atomic_uintmax_t;
-
-typedef see-below atomic_signed_lock_free; // since C++20
-typedef see-below atomic_unsigned_lock_free; // since C++20
-
-// flag type and operations
-
-typedef struct atomic_flag
-{
- atomic_flag() noexcept = default; // until C++20
- constexpr atomic_flag() noexcept; // since C++20
- atomic_flag(const atomic_flag&) = delete;
- atomic_flag& operator=(const atomic_flag&) = delete;
- atomic_flag& operator=(const atomic_flag&) volatile = delete;
-
- bool test(memory_order m = memory_order_seq_cst) volatile noexcept;
- bool test(memory_order m = memory_order_seq_cst) noexcept;
- bool test_and_set(memory_order m = memory_order_seq_cst) volatile noexcept;
- bool test_and_set(memory_order m = memory_order_seq_cst) noexcept;
- void clear(memory_order m = memory_order_seq_cst) volatile noexcept;
- void clear(memory_order m = memory_order_seq_cst) noexcept;
-
- void wait(bool, memory_order = memory_order::seq_cst) const volatile noexcept; // since C++20
- void wait(bool, memory_order = memory_order::seq_cst) const noexcept; // since C++20
- void notify_one() volatile noexcept; // since C++20
- void notify_one() noexcept; // since C++20
- void notify_all() volatile noexcept; // since C++20
- void notify_all() noexcept; // since C++20
-} atomic_flag;
-
-bool atomic_flag_test(volatile atomic_flag* obj) noexcept;
-bool atomic_flag_test(atomic_flag* obj) noexcept;
-bool atomic_flag_test_explicit(volatile atomic_flag* obj,
- memory_order m) noexcept;
-bool atomic_flag_test_explicit(atomic_flag* obj, memory_order m) noexcept;
-bool atomic_flag_test_and_set(volatile atomic_flag* obj) noexcept;
-bool atomic_flag_test_and_set(atomic_flag* obj) noexcept;
-bool atomic_flag_test_and_set_explicit(volatile atomic_flag* obj,
- memory_order m) noexcept;
-bool atomic_flag_test_and_set_explicit(atomic_flag* obj, memory_order m) noexcept;
-void atomic_flag_clear(volatile atomic_flag* obj) noexcept;
-void atomic_flag_clear(atomic_flag* obj) noexcept;
-void atomic_flag_clear_explicit(volatile atomic_flag* obj, memory_order m) noexcept;
-void atomic_flag_clear_explicit(atomic_flag* obj, memory_order m) noexcept;
-
-void atomic_wait(const volatile atomic_flag* obj, T old) noexcept; // since C++20
-void atomic_wait(const atomic_flag* obj, T old) noexcept; // since C++20
-void atomic_wait_explicit(const volatile atomic_flag* obj, T old, memory_order m) noexcept; // since C++20
-void atomic_wait_explicit(const atomic_flag* obj, T old, memory_order m) noexcept; // since C++20
-void atomic_one(volatile atomic_flag* obj) noexcept; // since C++20
-void atomic_one(atomic_flag* obj) noexcept; // since C++20
-void atomic_all(volatile atomic_flag* obj) noexcept; // since C++20
-void atomic_all(atomic_flag* obj) noexcept; // since C++20
-
-// fences
-
-void atomic_thread_fence(memory_order m) noexcept;
-void atomic_signal_fence(memory_order m) noexcept;
-
-// deprecated
-
-template <class T>
- void atomic_init(volatile atomic<T>* obj, atomic<T>::value_type desr) noexcept;
-
-template <class T>
- void atomic_init(atomic<T>* obj, atomic<T>::value_type desr) noexcept;
-
-#define ATOMIC_VAR_INIT(value) see below
-
-#define ATOMIC_FLAG_INIT see below
-
-} // std
-
-*/
-
-#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
-# include <__cxx03/atomic>
-#else
-# include <__config>
-
-# if defined(_LIBCPP_STDATOMIC_H) || defined(kill_dependency) || defined(atomic_load)
-# define _LIBCPP_STDATOMIC_H_HAS_DEFINITELY_BEEN_INCLUDED 1
-# else
-# define _LIBCPP_STDATOMIC_H_HAS_DEFINITELY_BEEN_INCLUDED 0
-# endif
-
-# if _LIBCPP_STD_VER < 23 && _LIBCPP_STDATOMIC_H_HAS_DEFINITELY_BEEN_INCLUDED
-# error <atomic> is incompatible with <stdatomic.h> before C++23. Please compile with -std=c++23.
-# endif
-
-# include <__atomic/aliases.h>
-# include <__atomic/atomic.h>
-# include <__atomic/atomic_flag.h>
-# include <__atomic/atomic_init.h>
-# include <__atomic/atomic_lock_free.h>
-# include <__atomic/atomic_sync.h>
-# include <__atomic/atomic_sync_timed.h>
-# include <__atomic/atomic_waitable_traits.h>
-# include <__atomic/check_memory_order.h>
-# include <__atomic/contention_t.h>
-# include <__atomic/fence.h>
-# include <__atomic/is_always_lock_free.h>
-# include <__atomic/kill_dependency.h>
-# include <__atomic/memory_order.h>
-# include <version>
-
-# if _LIBCPP_STD_VER >= 20
-# include <__atomic/atomic_ref.h>
-# endif
-
-# if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-# pragma GCC system_header
-# endif
-
-# if !_LIBCPP_HAS_ATOMIC_HEADER
-# error <atomic> is not implemented
-# endif
-
-# if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
-# include <cmath>
-# include <compare>
-# include <cstddef>
-# include <cstdlib>
-# include <cstring>
-# include <type_traits>
-# endif
-#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
-
-#endif // _LIBCPP_ATOMIC
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