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Diffstat (limited to 'contrib/llvm-project/libcxx/include/atomic')
| -rw-r--r-- | contrib/llvm-project/libcxx/include/atomic | 2835 |
1 files changed, 2835 insertions, 0 deletions
diff --git a/contrib/llvm-project/libcxx/include/atomic b/contrib/llvm-project/libcxx/include/atomic new file mode 100644 index 000000000000..07ea56f65064 --- /dev/null +++ b/contrib/llvm-project/libcxx/include/atomic @@ -0,0 +1,2835 @@ +// -*- C++ -*- +//===--------------------------- atomic -----------------------------------===// +// +// 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; + void wait(T, memory_order = memory_order::seq_cst) const noexcept; + void notify_one() volatile noexcept; + void notify_one() noexcept; + void notify_all() volatile noexcept; + void notify_all() noexcept; +}; + +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; + void wait(integral, memory_order = memory_order::seq_cst) const noexcept; + void notify_one() volatile noexcept; + void notify_one() noexcept; + void notify_all() volatile noexcept; + void notify_all() noexcept; +}; + +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; + void wait(T*, memory_order = memory_order::seq_cst) const noexcept; + void notify_one() volatile noexcept; + void notify_one() noexcept; + void notify_all() volatile noexcept; + void notify_all() noexcept; +}; + + +template <class T> + bool atomic_is_lock_free(const volatile atomic<T>* obj) noexcept; + +template <class T> + bool atomic_is_lock_free(const atomic<T>* obj) noexcept; + +template <class T> + void atomic_store(volatile atomic<T>* obj, T desr) noexcept; + +template <class T> + void atomic_store(atomic<T>* obj, T desr) noexcept; + +template <class T> + void atomic_store_explicit(volatile atomic<T>* obj, T desr, memory_order m) noexcept; + +template <class T> + void atomic_store_explicit(atomic<T>* obj, T desr, memory_order m) noexcept; + +template <class T> + T atomic_load(const volatile atomic<T>* obj) noexcept; + +template <class T> + T atomic_load(const atomic<T>* obj) noexcept; + +template <class T> + T atomic_load_explicit(const volatile atomic<T>* obj, memory_order m) noexcept; + +template <class T> + T atomic_load_explicit(const atomic<T>* obj, memory_order m) noexcept; + +template <class T> + T atomic_exchange(volatile atomic<T>* obj, T desr) noexcept; + +template <class T> + T atomic_exchange(atomic<T>* obj, T desr) noexcept; + +template <class T> + T atomic_exchange_explicit(volatile atomic<T>* obj, T desr, memory_order m) noexcept; + +template <class T> + T atomic_exchange_explicit(atomic<T>* obj, T desr, memory_order m) noexcept; + +template <class T> + bool atomic_compare_exchange_weak(volatile atomic<T>* obj, T* expc, T desr) noexcept; + +template <class T> + bool atomic_compare_exchange_weak(atomic<T>* obj, T* expc, T desr) noexcept; + +template <class T> + bool atomic_compare_exchange_strong(volatile atomic<T>* obj, T* expc, T desr) noexcept; + +template <class T> + bool atomic_compare_exchange_strong(atomic<T>* obj, T* expc, T desr) noexcept; + +template <class T> + bool atomic_compare_exchange_weak_explicit(volatile atomic<T>* obj, T* expc, + T desr, + memory_order s, memory_order f) noexcept; + +template <class T> + bool atomic_compare_exchange_weak_explicit(atomic<T>* obj, T* expc, T desr, + memory_order s, memory_order f) noexcept; + +template <class T> + bool atomic_compare_exchange_strong_explicit(volatile atomic<T>* obj, + T* expc, T desr, + memory_order s, memory_order f) noexcept; + +template <class T> + bool atomic_compare_exchange_strong_explicit(atomic<T>* obj, T* expc, + T desr, + memory_order s, memory_order f) noexcept; + +template <class T> + void atomic_wait(const volatile atomic<T>* obj, T old) noexcept; + +template <class T> + void atomic_wait(const atomic<T>* obj, T old) noexcept; + +template <class T> + void atomic_wait_explicit(const volatile atomic<T>* obj, T old, memory_order m) noexcept; + +template <class T> + void atomic_wait_explicit(const atomic<T>* obj, T old, memory_order m) noexcept; + +template <class T> + void atomic_one(volatile atomic<T>* obj) noexcept; + +template <class T> + void atomic_one(atomic<T>* obj) noexcept; + +template <class T> + void atomic_all(volatile atomic<T>* obj) noexcept; + +template <class T> + void atomic_all(atomic<T>* obj) noexcept; + +template <class Integral> + Integral atomic_fetch_add(volatile atomic<Integral>* obj, Integral op) noexcept; + +template <class Integral> + Integral atomic_fetch_add(atomic<Integral>* obj, Integral op) noexcept; + +template <class Integral> + Integral atomic_fetch_add_explicit(volatile atomic<Integral>* obj, Integral op, + memory_order m) noexcept; +template <class Integral> + Integral atomic_fetch_add_explicit(atomic<Integral>* obj, Integral op, + memory_order m) noexcept; +template <class Integral> + Integral atomic_fetch_sub(volatile atomic<Integral>* obj, Integral op) noexcept; + +template <class Integral> + Integral atomic_fetch_sub(atomic<Integral>* obj, Integral op) noexcept; + +template <class Integral> + Integral atomic_fetch_sub_explicit(volatile atomic<Integral>* obj, Integral op, + memory_order m) noexcept; + +template <class Integral> + Integral atomic_fetch_sub_explicit(atomic<Integral>* obj, Integral op, + memory_order m) noexcept; + +template <class Integral> + Integral atomic_fetch_and(volatile atomic<Integral>* obj, Integral op) noexcept; + +template <class Integral> + Integral atomic_fetch_and(atomic<Integral>* obj, Integral op) noexcept; + +template <class Integral> + Integral atomic_fetch_and_explicit(volatile atomic<Integral>* obj, Integral op, + memory_order m) noexcept; + +template <class Integral> + Integral atomic_fetch_and_explicit(atomic<Integral>* obj, Integral op, + memory_order m) noexcept; + +template <class Integral> + Integral atomic_fetch_or(volatile atomic<Integral>* obj, Integral op) noexcept; + +template <class Integral> + Integral atomic_fetch_or(atomic<Integral>* obj, Integral op) noexcept; + +template <class Integral> + Integral atomic_fetch_or_explicit(volatile atomic<Integral>* obj, Integral op, + memory_order m) noexcept; + +template <class Integral> + Integral atomic_fetch_or_explicit(atomic<Integral>* obj, Integral op, + memory_order m) noexcept; + +template <class Integral> + Integral atomic_fetch_xor(volatile atomic<Integral>* obj, Integral op) noexcept; + +template <class Integral> + Integral atomic_fetch_xor(atomic<Integral>* obj, Integral op) noexcept; + +template <class Integral> + Integral atomic_fetch_xor_explicit(volatile atomic<Integral>* obj, Integral op, + memory_order m) noexcept; + +template <class Integral> + Integral atomic_fetch_xor_explicit(atomic<Integral>* obj, Integral op, + memory_order m) noexcept; + +template <class T> + T* atomic_fetch_add(volatile atomic<T*>* obj, ptrdiff_t op) noexcept; + +template <class T> + T* atomic_fetch_add(atomic<T*>* obj, ptrdiff_t op) noexcept; + +template <class T> + T* atomic_fetch_add_explicit(volatile atomic<T*>* obj, ptrdiff_t op, + memory_order m) noexcept; + +template <class T> + T* atomic_fetch_add_explicit(atomic<T*>* obj, ptrdiff_t op, memory_order m) noexcept; + +template <class T> + T* atomic_fetch_sub(volatile atomic<T*>* obj, ptrdiff_t op) noexcept; + +template <class T> + T* atomic_fetch_sub(atomic<T*>* obj, ptrdiff_t op) noexcept; + +template <class T> + T* atomic_fetch_sub_explicit(volatile atomic<T*>* obj, ptrdiff_t op, + memory_order m) noexcept; + +template <class T> + T* atomic_fetch_sub_explicit(atomic<T*>* obj, ptrdiff_t op, memory_order m) noexcept; + +// 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; + +// 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; + void wait(bool, memory_order = memory_order::seq_cst) const noexcept; + void notify_one() volatile noexcept; + void notify_one() noexcept; + void notify_all() volatile noexcept; + void notify_all() noexcept; +} 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; +void atomic_wait(const atomic_flag* obj, T old) noexcept; +void atomic_wait_explicit(const volatile atomic_flag* obj, T old, memory_order m) noexcept; +void atomic_wait_explicit(const atomic_flag* obj, T old, memory_order m) noexcept; +void atomic_one(volatile atomic_flag* obj) noexcept; +void atomic_one(atomic_flag* obj) noexcept; +void atomic_all(volatile atomic_flag* obj) noexcept; +void atomic_all(atomic_flag* obj) noexcept; + +// 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, typename atomic<T>::value_type desr) noexcept; + +template <class T> + void atomic_init(atomic<T>* obj, typename atomic<T>::value_type desr) noexcept; + +#define ATOMIC_VAR_INIT(value) see below + +#define ATOMIC_FLAG_INIT see below + +} // std + +*/ + +#include <__availability> +#include <__config> +#include <__threading_support> +#include <cstddef> +#include <cstdint> +#include <cstring> +#include <type_traits> +#include <version> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +#ifdef _LIBCPP_HAS_NO_THREADS +# error <atomic> is not supported on this single threaded system +#endif +#ifdef _LIBCPP_HAS_NO_ATOMIC_HEADER +# error <atomic> is not implemented +#endif +#ifdef kill_dependency +# error C++ standard library is incompatible with <stdatomic.h> +#endif + +#define _LIBCPP_CHECK_STORE_MEMORY_ORDER(__m) \ + _LIBCPP_DIAGNOSE_WARNING(__m == memory_order_consume || \ + __m == memory_order_acquire || \ + __m == memory_order_acq_rel, \ + "memory order argument to atomic operation is invalid") + +#define _LIBCPP_CHECK_LOAD_MEMORY_ORDER(__m) \ + _LIBCPP_DIAGNOSE_WARNING(__m == memory_order_release || \ + __m == memory_order_acq_rel, \ + "memory order argument to atomic operation is invalid") + +#define _LIBCPP_CHECK_EXCHANGE_MEMORY_ORDER(__m, __f) \ + _LIBCPP_DIAGNOSE_WARNING(__f == memory_order_release || \ + __f == memory_order_acq_rel, \ + "memory order argument to atomic operation is invalid") + +_LIBCPP_BEGIN_NAMESPACE_STD + +// Figure out what the underlying type for `memory_order` would be if it were +// declared as an unscoped enum (accounting for -fshort-enums). Use this result +// to pin the underlying type in C++20. +enum __legacy_memory_order { + __mo_relaxed, + __mo_consume, + __mo_acquire, + __mo_release, + __mo_acq_rel, + __mo_seq_cst +}; + +typedef underlying_type<__legacy_memory_order>::type __memory_order_underlying_t; + +#if _LIBCPP_STD_VER > 17 + +enum class memory_order : __memory_order_underlying_t { + relaxed = __mo_relaxed, + consume = __mo_consume, + acquire = __mo_acquire, + release = __mo_release, + acq_rel = __mo_acq_rel, + seq_cst = __mo_seq_cst +}; + +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; + +#else + +typedef enum memory_order { + memory_order_relaxed = __mo_relaxed, + memory_order_consume = __mo_consume, + memory_order_acquire = __mo_acquire, + memory_order_release = __mo_release, + memory_order_acq_rel = __mo_acq_rel, + memory_order_seq_cst = __mo_seq_cst, +} memory_order; + +#endif // _LIBCPP_STD_VER > 17 + +template <typename _Tp> _LIBCPP_INLINE_VISIBILITY +bool __cxx_nonatomic_compare_equal(_Tp const& __lhs, _Tp const& __rhs) { + return _VSTD::memcmp(&__lhs, &__rhs, sizeof(_Tp)) == 0; +} + +static_assert((is_same<underlying_type<memory_order>::type, __memory_order_underlying_t>::value), + "unexpected underlying type for std::memory_order"); + +#if defined(_LIBCPP_HAS_GCC_ATOMIC_IMP) || \ + defined(_LIBCPP_ATOMIC_ONLY_USE_BUILTINS) + +// [atomics.types.generic]p1 guarantees _Tp is trivially copyable. Because +// the default operator= in an object is not volatile, a byte-by-byte copy +// is required. +template <typename _Tp, typename _Tv> _LIBCPP_INLINE_VISIBILITY +typename enable_if<is_assignable<_Tp&, _Tv>::value>::type +__cxx_atomic_assign_volatile(_Tp& __a_value, _Tv const& __val) { + __a_value = __val; +} +template <typename _Tp, typename _Tv> _LIBCPP_INLINE_VISIBILITY +typename enable_if<is_assignable<_Tp&, _Tv>::value>::type +__cxx_atomic_assign_volatile(_Tp volatile& __a_value, _Tv volatile const& __val) { + volatile char* __to = reinterpret_cast<volatile char*>(&__a_value); + volatile char* __end = __to + sizeof(_Tp); + volatile const char* __from = reinterpret_cast<volatile const char*>(&__val); + while (__to != __end) + *__to++ = *__from++; +} + +#endif + +#if defined(_LIBCPP_HAS_GCC_ATOMIC_IMP) + +template <typename _Tp> +struct __cxx_atomic_base_impl { + + _LIBCPP_INLINE_VISIBILITY +#ifndef _LIBCPP_CXX03_LANG + __cxx_atomic_base_impl() _NOEXCEPT = default; +#else + __cxx_atomic_base_impl() _NOEXCEPT : __a_value() {} +#endif // _LIBCPP_CXX03_LANG + _LIBCPP_CONSTEXPR explicit __cxx_atomic_base_impl(_Tp value) _NOEXCEPT + : __a_value(value) {} + _Tp __a_value; +}; + +_LIBCPP_INLINE_VISIBILITY inline _LIBCPP_CONSTEXPR int __to_gcc_order(memory_order __order) { + // Avoid switch statement to make this a constexpr. + return __order == memory_order_relaxed ? __ATOMIC_RELAXED: + (__order == memory_order_acquire ? __ATOMIC_ACQUIRE: + (__order == memory_order_release ? __ATOMIC_RELEASE: + (__order == memory_order_seq_cst ? __ATOMIC_SEQ_CST: + (__order == memory_order_acq_rel ? __ATOMIC_ACQ_REL: + __ATOMIC_CONSUME)))); +} + +_LIBCPP_INLINE_VISIBILITY inline _LIBCPP_CONSTEXPR int __to_gcc_failure_order(memory_order __order) { + // Avoid switch statement to make this a constexpr. + return __order == memory_order_relaxed ? __ATOMIC_RELAXED: + (__order == memory_order_acquire ? __ATOMIC_ACQUIRE: + (__order == memory_order_release ? __ATOMIC_RELAXED: + (__order == memory_order_seq_cst ? __ATOMIC_SEQ_CST: + (__order == memory_order_acq_rel ? __ATOMIC_ACQUIRE: + __ATOMIC_CONSUME)))); +} + +template <typename _Tp> +_LIBCPP_INLINE_VISIBILITY +void __cxx_atomic_init(volatile __cxx_atomic_base_impl<_Tp>* __a, _Tp __val) { + __cxx_atomic_assign_volatile(__a->__a_value, __val); +} + +template <typename _Tp> +_LIBCPP_INLINE_VISIBILITY +void __cxx_atomic_init(__cxx_atomic_base_impl<_Tp>* __a, _Tp __val) { + __a->__a_value = __val; +} + +_LIBCPP_INLINE_VISIBILITY inline +void __cxx_atomic_thread_fence(memory_order __order) { + __atomic_thread_fence(__to_gcc_order(__order)); +} + +_LIBCPP_INLINE_VISIBILITY inline +void __cxx_atomic_signal_fence(memory_order __order) { + __atomic_signal_fence(__to_gcc_order(__order)); +} + +template <typename _Tp> +_LIBCPP_INLINE_VISIBILITY +void __cxx_atomic_store(volatile __cxx_atomic_base_impl<_Tp>* __a, _Tp __val, + memory_order __order) { + __atomic_store(&__a->__a_value, &__val, + __to_gcc_order(__order)); +} + +template <typename _Tp> +_LIBCPP_INLINE_VISIBILITY +void __cxx_atomic_store(__cxx_atomic_base_impl<_Tp>* __a, _Tp __val, + memory_order __order) { + __atomic_store(&__a->__a_value, &__val, + __to_gcc_order(__order)); +} + +template <typename _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_load(const volatile __cxx_atomic_base_impl<_Tp>* __a, + memory_order __order) { + _Tp __ret; + __atomic_load(&__a->__a_value, &__ret, + __to_gcc_order(__order)); + return __ret; +} + +template <typename _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_load(const __cxx_atomic_base_impl<_Tp>* __a, memory_order __order) { + _Tp __ret; + __atomic_load(&__a->__a_value, &__ret, + __to_gcc_order(__order)); + return __ret; +} + +template <typename _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_exchange(volatile __cxx_atomic_base_impl<_Tp>* __a, + _Tp __value, memory_order __order) { + _Tp __ret; + __atomic_exchange(&__a->__a_value, &__value, &__ret, + __to_gcc_order(__order)); + return __ret; +} + +template <typename _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_exchange(__cxx_atomic_base_impl<_Tp>* __a, _Tp __value, + memory_order __order) { + _Tp __ret; + __atomic_exchange(&__a->__a_value, &__value, &__ret, + __to_gcc_order(__order)); + return __ret; +} + +template <typename _Tp> +_LIBCPP_INLINE_VISIBILITY +bool __cxx_atomic_compare_exchange_strong( + volatile __cxx_atomic_base_impl<_Tp>* __a, _Tp* __expected, _Tp __value, + memory_order __success, memory_order __failure) { + return __atomic_compare_exchange(&__a->__a_value, __expected, &__value, + false, + __to_gcc_order(__success), + __to_gcc_failure_order(__failure)); +} + +template <typename _Tp> +_LIBCPP_INLINE_VISIBILITY +bool __cxx_atomic_compare_exchange_strong( + __cxx_atomic_base_impl<_Tp>* __a, _Tp* __expected, _Tp __value, memory_order __success, + memory_order __failure) { + return __atomic_compare_exchange(&__a->__a_value, __expected, &__value, + false, + __to_gcc_order(__success), + __to_gcc_failure_order(__failure)); +} + +template <typename _Tp> +_LIBCPP_INLINE_VISIBILITY +bool __cxx_atomic_compare_exchange_weak( + volatile __cxx_atomic_base_impl<_Tp>* __a, _Tp* __expected, _Tp __value, + memory_order __success, memory_order __failure) { + return __atomic_compare_exchange(&__a->__a_value, __expected, &__value, + true, + __to_gcc_order(__success), + __to_gcc_failure_order(__failure)); +} + +template <typename _Tp> +_LIBCPP_INLINE_VISIBILITY +bool __cxx_atomic_compare_exchange_weak( + __cxx_atomic_base_impl<_Tp>* __a, _Tp* __expected, _Tp __value, memory_order __success, + memory_order __failure) { + return __atomic_compare_exchange(&__a->__a_value, __expected, &__value, + true, + __to_gcc_order(__success), + __to_gcc_failure_order(__failure)); +} + +template <typename _Tp> +struct __skip_amt { enum {value = 1}; }; + +template <typename _Tp> +struct __skip_amt<_Tp*> { enum {value = sizeof(_Tp)}; }; + +// FIXME: Haven't figured out what the spec says about using arrays with +// atomic_fetch_add. Force a failure rather than creating bad behavior. +template <typename _Tp> +struct __skip_amt<_Tp[]> { }; +template <typename _Tp, int n> +struct __skip_amt<_Tp[n]> { }; + +template <typename _Tp, typename _Td> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_fetch_add(volatile __cxx_atomic_base_impl<_Tp>* __a, + _Td __delta, memory_order __order) { + return __atomic_fetch_add(&__a->__a_value, __delta * __skip_amt<_Tp>::value, + __to_gcc_order(__order)); +} + +template <typename _Tp, typename _Td> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_fetch_add(__cxx_atomic_base_impl<_Tp>* __a, _Td __delta, + memory_order __order) { + return __atomic_fetch_add(&__a->__a_value, __delta * __skip_amt<_Tp>::value, + __to_gcc_order(__order)); +} + +template <typename _Tp, typename _Td> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_fetch_sub(volatile __cxx_atomic_base_impl<_Tp>* __a, + _Td __delta, memory_order __order) { + return __atomic_fetch_sub(&__a->__a_value, __delta * __skip_amt<_Tp>::value, + __to_gcc_order(__order)); +} + +template <typename _Tp, typename _Td> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_fetch_sub(__cxx_atomic_base_impl<_Tp>* __a, _Td __delta, + memory_order __order) { + return __atomic_fetch_sub(&__a->__a_value, __delta * __skip_amt<_Tp>::value, + __to_gcc_order(__order)); +} + +template <typename _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_fetch_and(volatile __cxx_atomic_base_impl<_Tp>* __a, + _Tp __pattern, memory_order __order) { + return __atomic_fetch_and(&__a->__a_value, __pattern, + __to_gcc_order(__order)); +} + +template <typename _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_fetch_and(__cxx_atomic_base_impl<_Tp>* __a, + _Tp __pattern, memory_order __order) { + return __atomic_fetch_and(&__a->__a_value, __pattern, + __to_gcc_order(__order)); +} + +template <typename _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_fetch_or(volatile __cxx_atomic_base_impl<_Tp>* __a, + _Tp __pattern, memory_order __order) { + return __atomic_fetch_or(&__a->__a_value, __pattern, + __to_gcc_order(__order)); +} + +template <typename _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_fetch_or(__cxx_atomic_base_impl<_Tp>* __a, _Tp __pattern, + memory_order __order) { + return __atomic_fetch_or(&__a->__a_value, __pattern, + __to_gcc_order(__order)); +} + +template <typename _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_fetch_xor(volatile __cxx_atomic_base_impl<_Tp>* __a, + _Tp __pattern, memory_order __order) { + return __atomic_fetch_xor(&__a->__a_value, __pattern, + __to_gcc_order(__order)); +} + +template <typename _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_fetch_xor(__cxx_atomic_base_impl<_Tp>* __a, _Tp __pattern, + memory_order __order) { + return __atomic_fetch_xor(&__a->__a_value, __pattern, + __to_gcc_order(__order)); +} + +#define __cxx_atomic_is_lock_free(__s) __atomic_is_lock_free(__s, 0) + +#elif defined(_LIBCPP_HAS_C_ATOMIC_IMP) + +template <typename _Tp> +struct __cxx_atomic_base_impl { + + _LIBCPP_INLINE_VISIBILITY +#ifndef _LIBCPP_CXX03_LANG + __cxx_atomic_base_impl() _NOEXCEPT = default; +#else + __cxx_atomic_base_impl() _NOEXCEPT : __a_value() {} +#endif // _LIBCPP_CXX03_LANG + _LIBCPP_CONSTEXPR explicit __cxx_atomic_base_impl(_Tp value) _NOEXCEPT + : __a_value(value) {} + _LIBCPP_DISABLE_EXTENSION_WARNING _Atomic(_Tp) __a_value; +}; + +#define __cxx_atomic_is_lock_free(__s) __c11_atomic_is_lock_free(__s) + +_LIBCPP_INLINE_VISIBILITY inline +void __cxx_atomic_thread_fence(memory_order __order) _NOEXCEPT { + __c11_atomic_thread_fence(static_cast<__memory_order_underlying_t>(__order)); +} + +_LIBCPP_INLINE_VISIBILITY inline +void __cxx_atomic_signal_fence(memory_order __order) _NOEXCEPT { + __c11_atomic_signal_fence(static_cast<__memory_order_underlying_t>(__order)); +} + +template<class _Tp> +_LIBCPP_INLINE_VISIBILITY +void __cxx_atomic_init(__cxx_atomic_base_impl<_Tp> volatile* __a, _Tp __val) _NOEXCEPT { + __c11_atomic_init(&__a->__a_value, __val); +} +template<class _Tp> +_LIBCPP_INLINE_VISIBILITY +void __cxx_atomic_init(__cxx_atomic_base_impl<_Tp> * __a, _Tp __val) _NOEXCEPT { + __c11_atomic_init(&__a->__a_value, __val); +} + +template<class _Tp> +_LIBCPP_INLINE_VISIBILITY +void __cxx_atomic_store(__cxx_atomic_base_impl<_Tp> volatile* __a, _Tp __val, memory_order __order) _NOEXCEPT { + __c11_atomic_store(&__a->__a_value, __val, static_cast<__memory_order_underlying_t>(__order)); +} +template<class _Tp> +_LIBCPP_INLINE_VISIBILITY +void __cxx_atomic_store(__cxx_atomic_base_impl<_Tp> * __a, _Tp __val, memory_order __order) _NOEXCEPT { + __c11_atomic_store(&__a->__a_value, __val, static_cast<__memory_order_underlying_t>(__order)); +} + +template<class _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_load(__cxx_atomic_base_impl<_Tp> const volatile* __a, memory_order __order) _NOEXCEPT { + using __ptr_type = typename remove_const<decltype(__a->__a_value)>::type*; + return __c11_atomic_load(const_cast<__ptr_type>(&__a->__a_value), static_cast<__memory_order_underlying_t>(__order)); +} +template<class _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_load(__cxx_atomic_base_impl<_Tp> const* __a, memory_order __order) _NOEXCEPT { + using __ptr_type = typename remove_const<decltype(__a->__a_value)>::type*; + return __c11_atomic_load(const_cast<__ptr_type>(&__a->__a_value), static_cast<__memory_order_underlying_t>(__order)); +} + +template<class _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_exchange(__cxx_atomic_base_impl<_Tp> volatile* __a, _Tp __value, memory_order __order) _NOEXCEPT { + return __c11_atomic_exchange(&__a->__a_value, __value, static_cast<__memory_order_underlying_t>(__order)); +} +template<class _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_exchange(__cxx_atomic_base_impl<_Tp> * __a, _Tp __value, memory_order __order) _NOEXCEPT { + return __c11_atomic_exchange(&__a->__a_value, __value, static_cast<__memory_order_underlying_t>(__order)); +} + +_LIBCPP_INLINE_VISIBILITY inline _LIBCPP_CONSTEXPR memory_order __to_failure_order(memory_order __order) { + // Avoid switch statement to make this a constexpr. + return __order == memory_order_release ? memory_order_relaxed: + (__order == memory_order_acq_rel ? memory_order_acquire: + __order); +} + +template<class _Tp> +_LIBCPP_INLINE_VISIBILITY +bool __cxx_atomic_compare_exchange_strong(__cxx_atomic_base_impl<_Tp> volatile* __a, _Tp* __expected, _Tp __value, memory_order __success, memory_order __failure) _NOEXCEPT { + return __c11_atomic_compare_exchange_strong(&__a->__a_value, __expected, __value, static_cast<__memory_order_underlying_t>(__success), static_cast<__memory_order_underlying_t>(__to_failure_order(__failure))); +} +template<class _Tp> +_LIBCPP_INLINE_VISIBILITY +bool __cxx_atomic_compare_exchange_strong(__cxx_atomic_base_impl<_Tp> * __a, _Tp* __expected, _Tp __value, memory_order __success, memory_order __failure) _NOEXCEPT { + return __c11_atomic_compare_exchange_strong(&__a->__a_value, __expected, __value, static_cast<__memory_order_underlying_t>(__success), static_cast<__memory_order_underlying_t>(__to_failure_order(__failure))); +} + +template<class _Tp> +_LIBCPP_INLINE_VISIBILITY +bool __cxx_atomic_compare_exchange_weak(__cxx_atomic_base_impl<_Tp> volatile* __a, _Tp* __expected, _Tp __value, memory_order __success, memory_order __failure) _NOEXCEPT { + return __c11_atomic_compare_exchange_weak(&__a->__a_value, __expected, __value, static_cast<__memory_order_underlying_t>(__success), static_cast<__memory_order_underlying_t>(__to_failure_order(__failure))); +} +template<class _Tp> +_LIBCPP_INLINE_VISIBILITY +bool __cxx_atomic_compare_exchange_weak(__cxx_atomic_base_impl<_Tp> * __a, _Tp* __expected, _Tp __value, memory_order __success, memory_order __failure) _NOEXCEPT { + return __c11_atomic_compare_exchange_weak(&__a->__a_value, __expected, __value, static_cast<__memory_order_underlying_t>(__success), static_cast<__memory_order_underlying_t>(__to_failure_order(__failure))); +} + +template<class _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_fetch_add(__cxx_atomic_base_impl<_Tp> volatile* __a, _Tp __delta, memory_order __order) _NOEXCEPT { + return __c11_atomic_fetch_add(&__a->__a_value, __delta, static_cast<__memory_order_underlying_t>(__order)); +} +template<class _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_fetch_add(__cxx_atomic_base_impl<_Tp> * __a, _Tp __delta, memory_order __order) _NOEXCEPT { + return __c11_atomic_fetch_add(&__a->__a_value, __delta, static_cast<__memory_order_underlying_t>(__order)); +} + +template<class _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp* __cxx_atomic_fetch_add(__cxx_atomic_base_impl<_Tp*> volatile* __a, ptrdiff_t __delta, memory_order __order) _NOEXCEPT { + return __c11_atomic_fetch_add(&__a->__a_value, __delta, static_cast<__memory_order_underlying_t>(__order)); +} +template<class _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp* __cxx_atomic_fetch_add(__cxx_atomic_base_impl<_Tp*> * __a, ptrdiff_t __delta, memory_order __order) _NOEXCEPT { + return __c11_atomic_fetch_add(&__a->__a_value, __delta, static_cast<__memory_order_underlying_t>(__order)); +} + +template<class _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_fetch_sub(__cxx_atomic_base_impl<_Tp> volatile* __a, _Tp __delta, memory_order __order) _NOEXCEPT { + return __c11_atomic_fetch_sub(&__a->__a_value, __delta, static_cast<__memory_order_underlying_t>(__order)); +} +template<class _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_fetch_sub(__cxx_atomic_base_impl<_Tp> * __a, _Tp __delta, memory_order __order) _NOEXCEPT { + return __c11_atomic_fetch_sub(&__a->__a_value, __delta, static_cast<__memory_order_underlying_t>(__order)); +} +template<class _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp* __cxx_atomic_fetch_sub(__cxx_atomic_base_impl<_Tp*> volatile* __a, ptrdiff_t __delta, memory_order __order) _NOEXCEPT { + return __c11_atomic_fetch_sub(&__a->__a_value, __delta, static_cast<__memory_order_underlying_t>(__order)); +} +template<class _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp* __cxx_atomic_fetch_sub(__cxx_atomic_base_impl<_Tp*> * __a, ptrdiff_t __delta, memory_order __order) _NOEXCEPT { + return __c11_atomic_fetch_sub(&__a->__a_value, __delta, static_cast<__memory_order_underlying_t>(__order)); +} + +template<class _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_fetch_and(__cxx_atomic_base_impl<_Tp> volatile* __a, _Tp __pattern, memory_order __order) _NOEXCEPT { + return __c11_atomic_fetch_and(&__a->__a_value, __pattern, static_cast<__memory_order_underlying_t>(__order)); +} +template<class _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_fetch_and(__cxx_atomic_base_impl<_Tp> * __a, _Tp __pattern, memory_order __order) _NOEXCEPT { + return __c11_atomic_fetch_and(&__a->__a_value, __pattern, static_cast<__memory_order_underlying_t>(__order)); +} + +template<class _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_fetch_or(__cxx_atomic_base_impl<_Tp> volatile* __a, _Tp __pattern, memory_order __order) _NOEXCEPT { + return __c11_atomic_fetch_or(&__a->__a_value, __pattern, static_cast<__memory_order_underlying_t>(__order)); +} +template<class _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_fetch_or(__cxx_atomic_base_impl<_Tp> * __a, _Tp __pattern, memory_order __order) _NOEXCEPT { + return __c11_atomic_fetch_or(&__a->__a_value, __pattern, static_cast<__memory_order_underlying_t>(__order)); +} + +template<class _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_fetch_xor(__cxx_atomic_base_impl<_Tp> volatile* __a, _Tp __pattern, memory_order __order) _NOEXCEPT { + return __c11_atomic_fetch_xor(&__a->__a_value, __pattern, static_cast<__memory_order_underlying_t>(__order)); +} +template<class _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_fetch_xor(__cxx_atomic_base_impl<_Tp> * __a, _Tp __pattern, memory_order __order) _NOEXCEPT { + return __c11_atomic_fetch_xor(&__a->__a_value, __pattern, static_cast<__memory_order_underlying_t>(__order)); +} + +#endif // _LIBCPP_HAS_GCC_ATOMIC_IMP, _LIBCPP_HAS_C_ATOMIC_IMP + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp kill_dependency(_Tp __y) _NOEXCEPT +{ + return __y; +} + +#if defined(__CLANG_ATOMIC_BOOL_LOCK_FREE) +# define ATOMIC_BOOL_LOCK_FREE __CLANG_ATOMIC_BOOL_LOCK_FREE +# define ATOMIC_CHAR_LOCK_FREE __CLANG_ATOMIC_CHAR_LOCK_FREE +#ifndef _LIBCPP_HAS_NO_CHAR8_T +# define ATOMIC_CHAR8_T_LOCK_FREE __CLANG_ATOMIC_CHAR8_T_LOCK_FREE +#endif +# define ATOMIC_CHAR16_T_LOCK_FREE __CLANG_ATOMIC_CHAR16_T_LOCK_FREE +# define ATOMIC_CHAR32_T_LOCK_FREE __CLANG_ATOMIC_CHAR32_T_LOCK_FREE +# define ATOMIC_WCHAR_T_LOCK_FREE __CLANG_ATOMIC_WCHAR_T_LOCK_FREE +# define ATOMIC_SHORT_LOCK_FREE __CLANG_ATOMIC_SHORT_LOCK_FREE +# define ATOMIC_INT_LOCK_FREE __CLANG_ATOMIC_INT_LOCK_FREE +# define ATOMIC_LONG_LOCK_FREE __CLANG_ATOMIC_LONG_LOCK_FREE +# define ATOMIC_LLONG_LOCK_FREE __CLANG_ATOMIC_LLONG_LOCK_FREE +# define ATOMIC_POINTER_LOCK_FREE __CLANG_ATOMIC_POINTER_LOCK_FREE +#elif defined(__GCC_ATOMIC_BOOL_LOCK_FREE) +# define ATOMIC_BOOL_LOCK_FREE __GCC_ATOMIC_BOOL_LOCK_FREE +# define ATOMIC_CHAR_LOCK_FREE __GCC_ATOMIC_CHAR_LOCK_FREE +#ifndef _LIBCPP_HAS_NO_CHAR8_T +# define ATOMIC_CHAR8_T_LOCK_FREE __GCC_ATOMIC_CHAR8_T_LOCK_FREE +#endif +# define ATOMIC_CHAR16_T_LOCK_FREE __GCC_ATOMIC_CHAR16_T_LOCK_FREE +# define ATOMIC_CHAR32_T_LOCK_FREE __GCC_ATOMIC_CHAR32_T_LOCK_FREE +# define ATOMIC_WCHAR_T_LOCK_FREE __GCC_ATOMIC_WCHAR_T_LOCK_FREE +# define ATOMIC_SHORT_LOCK_FREE __GCC_ATOMIC_SHORT_LOCK_FREE +# define ATOMIC_INT_LOCK_FREE __GCC_ATOMIC_INT_LOCK_FREE +# define ATOMIC_LONG_LOCK_FREE __GCC_ATOMIC_LONG_LOCK_FREE +# define ATOMIC_LLONG_LOCK_FREE __GCC_ATOMIC_LLONG_LOCK_FREE +# define ATOMIC_POINTER_LOCK_FREE __GCC_ATOMIC_POINTER_LOCK_FREE +#endif + +#ifdef _LIBCPP_ATOMIC_ONLY_USE_BUILTINS + +template<typename _Tp> +struct __cxx_atomic_lock_impl { + + _LIBCPP_INLINE_VISIBILITY + __cxx_atomic_lock_impl() _NOEXCEPT + : __a_value(), __a_lock(0) {} + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR explicit + __cxx_atomic_lock_impl(_Tp value) _NOEXCEPT + : __a_value(value), __a_lock(0) {} + + _Tp __a_value; + mutable __cxx_atomic_base_impl<_LIBCPP_ATOMIC_FLAG_TYPE> __a_lock; + + _LIBCPP_INLINE_VISIBILITY void __lock() const volatile { + while(1 == __cxx_atomic_exchange(&__a_lock, _LIBCPP_ATOMIC_FLAG_TYPE(true), memory_order_acquire)) + /*spin*/; + } + _LIBCPP_INLINE_VISIBILITY void __lock() const { + while(1 == __cxx_atomic_exchange(&__a_lock, _LIBCPP_ATOMIC_FLAG_TYPE(true), memory_order_acquire)) + /*spin*/; + } + _LIBCPP_INLINE_VISIBILITY void __unlock() const volatile { + __cxx_atomic_store(&__a_lock, _LIBCPP_ATOMIC_FLAG_TYPE(false), memory_order_release); + } + _LIBCPP_INLINE_VISIBILITY void __unlock() const { + __cxx_atomic_store(&__a_lock, _LIBCPP_ATOMIC_FLAG_TYPE(false), memory_order_release); + } + _LIBCPP_INLINE_VISIBILITY _Tp __read() const volatile { + __lock(); + _Tp __old; + __cxx_atomic_assign_volatile(__old, __a_value); + __unlock(); + return __old; + } + _LIBCPP_INLINE_VISIBILITY _Tp __read() const { + __lock(); + _Tp __old = __a_value; + __unlock(); + return __old; + } +}; + +template <typename _Tp> +_LIBCPP_INLINE_VISIBILITY +void __cxx_atomic_init(volatile __cxx_atomic_lock_impl<_Tp>* __a, _Tp __val) { + __cxx_atomic_assign_volatile(__a->__a_value, __val); +} +template <typename _Tp> +_LIBCPP_INLINE_VISIBILITY +void __cxx_atomic_init(__cxx_atomic_lock_impl<_Tp>* __a, _Tp __val) { + __a->__a_value = __val; +} + +template <typename _Tp> +_LIBCPP_INLINE_VISIBILITY +void __cxx_atomic_store(volatile __cxx_atomic_lock_impl<_Tp>* __a, _Tp __val, memory_order) { + __a->__lock(); + __cxx_atomic_assign_volatile(__a->__a_value, __val); + __a->__unlock(); +} +template <typename _Tp> +_LIBCPP_INLINE_VISIBILITY +void __cxx_atomic_store(__cxx_atomic_lock_impl<_Tp>* __a, _Tp __val, memory_order) { + __a->__lock(); + __a->__a_value = __val; + __a->__unlock(); +} + +template <typename _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_load(const volatile __cxx_atomic_lock_impl<_Tp>* __a, memory_order) { + return __a->__read(); +} +template <typename _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_load(const __cxx_atomic_lock_impl<_Tp>* __a, memory_order) { + return __a->__read(); +} + +template <typename _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_exchange(volatile __cxx_atomic_lock_impl<_Tp>* __a, _Tp __value, memory_order) { + __a->__lock(); + _Tp __old; + __cxx_atomic_assign_volatile(__old, __a->__a_value); + __cxx_atomic_assign_volatile(__a->__a_value, __value); + __a->__unlock(); + return __old; +} +template <typename _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_exchange(__cxx_atomic_lock_impl<_Tp>* __a, _Tp __value, memory_order) { + __a->__lock(); + _Tp __old = __a->__a_value; + __a->__a_value = __value; + __a->__unlock(); + return __old; +} + +template <typename _Tp> +_LIBCPP_INLINE_VISIBILITY +bool __cxx_atomic_compare_exchange_strong(volatile __cxx_atomic_lock_impl<_Tp>* __a, + _Tp* __expected, _Tp __value, memory_order, memory_order) { + _Tp __temp; + __a->__lock(); + __cxx_atomic_assign_volatile(__temp, __a->__a_value); + bool __ret = (_VSTD::memcmp(&__temp, __expected, sizeof(_Tp)) == 0); + if(__ret) + __cxx_atomic_assign_volatile(__a->__a_value, __value); + else + __cxx_atomic_assign_volatile(*__expected, __a->__a_value); + __a->__unlock(); + return __ret; +} +template <typename _Tp> +_LIBCPP_INLINE_VISIBILITY +bool __cxx_atomic_compare_exchange_strong(__cxx_atomic_lock_impl<_Tp>* __a, + _Tp* __expected, _Tp __value, memory_order, memory_order) { + __a->__lock(); + bool __ret = (_VSTD::memcmp(&__a->__a_value, __expected, sizeof(_Tp)) == 0); + if(__ret) + _VSTD::memcpy(&__a->__a_value, &__value, sizeof(_Tp)); + else + _VSTD::memcpy(__expected, &__a->__a_value, sizeof(_Tp)); + __a->__unlock(); + return __ret; +} + +template <typename _Tp> +_LIBCPP_INLINE_VISIBILITY +bool __cxx_atomic_compare_exchange_weak(volatile __cxx_atomic_lock_impl<_Tp>* __a, + _Tp* __expected, _Tp __value, memory_order, memory_order) { + _Tp __temp; + __a->__lock(); + __cxx_atomic_assign_volatile(__temp, __a->__a_value); + bool __ret = (_VSTD::memcmp(&__temp, __expected, sizeof(_Tp)) == 0); + if(__ret) + __cxx_atomic_assign_volatile(__a->__a_value, __value); + else + __cxx_atomic_assign_volatile(*__expected, __a->__a_value); + __a->__unlock(); + return __ret; +} +template <typename _Tp> +_LIBCPP_INLINE_VISIBILITY +bool __cxx_atomic_compare_exchange_weak(__cxx_atomic_lock_impl<_Tp>* __a, + _Tp* __expected, _Tp __value, memory_order, memory_order) { + __a->__lock(); + bool __ret = (_VSTD::memcmp(&__a->__a_value, __expected, sizeof(_Tp)) == 0); + if(__ret) + _VSTD::memcpy(&__a->__a_value, &__value, sizeof(_Tp)); + else + _VSTD::memcpy(__expected, &__a->__a_value, sizeof(_Tp)); + __a->__unlock(); + return __ret; +} + +template <typename _Tp, typename _Td> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_fetch_add(volatile __cxx_atomic_lock_impl<_Tp>* __a, + _Td __delta, memory_order) { + __a->__lock(); + _Tp __old; + __cxx_atomic_assign_volatile(__old, __a->__a_value); + __cxx_atomic_assign_volatile(__a->__a_value, _Tp(__old + __delta)); + __a->__unlock(); + return __old; +} +template <typename _Tp, typename _Td> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_fetch_add(__cxx_atomic_lock_impl<_Tp>* __a, + _Td __delta, memory_order) { + __a->__lock(); + _Tp __old = __a->__a_value; + __a->__a_value += __delta; + __a->__unlock(); + return __old; +} + +template <typename _Tp, typename _Td> +_LIBCPP_INLINE_VISIBILITY +_Tp* __cxx_atomic_fetch_add(volatile __cxx_atomic_lock_impl<_Tp*>* __a, + ptrdiff_t __delta, memory_order) { + __a->__lock(); + _Tp* __old; + __cxx_atomic_assign_volatile(__old, __a->__a_value); + __cxx_atomic_assign_volatile(__a->__a_value, __old + __delta); + __a->__unlock(); + return __old; +} +template <typename _Tp, typename _Td> +_LIBCPP_INLINE_VISIBILITY +_Tp* __cxx_atomic_fetch_add(__cxx_atomic_lock_impl<_Tp*>* __a, + ptrdiff_t __delta, memory_order) { + __a->__lock(); + _Tp* __old = __a->__a_value; + __a->__a_value += __delta; + __a->__unlock(); + return __old; +} + +template <typename _Tp, typename _Td> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_fetch_sub(volatile __cxx_atomic_lock_impl<_Tp>* __a, + _Td __delta, memory_order) { + __a->__lock(); + _Tp __old; + __cxx_atomic_assign_volatile(__old, __a->__a_value); + __cxx_atomic_assign_volatile(__a->__a_value, _Tp(__old - __delta)); + __a->__unlock(); + return __old; +} +template <typename _Tp, typename _Td> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_fetch_sub(__cxx_atomic_lock_impl<_Tp>* __a, + _Td __delta, memory_order) { + __a->__lock(); + _Tp __old = __a->__a_value; + __a->__a_value -= __delta; + __a->__unlock(); + return __old; +} + +template <typename _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_fetch_and(volatile __cxx_atomic_lock_impl<_Tp>* __a, + _Tp __pattern, memory_order) { + __a->__lock(); + _Tp __old; + __cxx_atomic_assign_volatile(__old, __a->__a_value); + __cxx_atomic_assign_volatile(__a->__a_value, _Tp(__old & __pattern)); + __a->__unlock(); + return __old; +} +template <typename _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_fetch_and(__cxx_atomic_lock_impl<_Tp>* __a, + _Tp __pattern, memory_order) { + __a->__lock(); + _Tp __old = __a->__a_value; + __a->__a_value &= __pattern; + __a->__unlock(); + return __old; +} + +template <typename _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_fetch_or(volatile __cxx_atomic_lock_impl<_Tp>* __a, + _Tp __pattern, memory_order) { + __a->__lock(); + _Tp __old; + __cxx_atomic_assign_volatile(__old, __a->__a_value); + __cxx_atomic_assign_volatile(__a->__a_value, _Tp(__old | __pattern)); + __a->__unlock(); + return __old; +} +template <typename _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_fetch_or(__cxx_atomic_lock_impl<_Tp>* __a, + _Tp __pattern, memory_order) { + __a->__lock(); + _Tp __old = __a->__a_value; + __a->__a_value |= __pattern; + __a->__unlock(); + return __old; +} + +template <typename _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_fetch_xor(volatile __cxx_atomic_lock_impl<_Tp>* __a, + _Tp __pattern, memory_order) { + __a->__lock(); + _Tp __old; + __cxx_atomic_assign_volatile(__old, __a->__a_value); + __cxx_atomic_assign_volatile(__a->__a_value, _Tp(__old ^ __pattern)); + __a->__unlock(); + return __old; +} +template <typename _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp __cxx_atomic_fetch_xor(__cxx_atomic_lock_impl<_Tp>* __a, + _Tp __pattern, memory_order) { + __a->__lock(); + _Tp __old = __a->__a_value; + __a->__a_value ^= __pattern; + __a->__unlock(); + return __old; +} + +#ifdef __cpp_lib_atomic_is_always_lock_free + +template<typename _Tp> struct __cxx_is_always_lock_free { + enum { __value = __atomic_always_lock_free(sizeof(_Tp), 0) }; }; + +#else + +template<typename _Tp> struct __cxx_is_always_lock_free { enum { __value = false }; }; +// Implementations must match the C ATOMIC_*_LOCK_FREE macro values. +template<> struct __cxx_is_always_lock_free<bool> { enum { __value = 2 == ATOMIC_BOOL_LOCK_FREE }; }; +template<> struct __cxx_is_always_lock_free<char> { enum { __value = 2 == ATOMIC_CHAR_LOCK_FREE }; }; +template<> struct __cxx_is_always_lock_free<signed char> { enum { __value = 2 == ATOMIC_CHAR_LOCK_FREE }; }; +template<> struct __cxx_is_always_lock_free<unsigned char> { enum { __value = 2 == ATOMIC_CHAR_LOCK_FREE }; }; +#ifndef _LIBCPP_HAS_NO_CHAR8_T +template<> struct __cxx_is_always_lock_free<char8_t> { enum { __value = 2 == ATOMIC_CHAR8_T_LOCK_FREE }; }; +#endif +template<> struct __cxx_is_always_lock_free<char16_t> { enum { __value = 2 == ATOMIC_CHAR16_T_LOCK_FREE }; }; +template<> struct __cxx_is_always_lock_free<char32_t> { enum { __value = 2 == ATOMIC_CHAR32_T_LOCK_FREE }; }; +template<> struct __cxx_is_always_lock_free<wchar_t> { enum { __value = 2 == ATOMIC_WCHAR_T_LOCK_FREE }; }; +template<> struct __cxx_is_always_lock_free<short> { enum { __value = 2 == ATOMIC_SHORT_LOCK_FREE }; }; +template<> struct __cxx_is_always_lock_free<unsigned short> { enum { __value = 2 == ATOMIC_SHORT_LOCK_FREE }; }; +template<> struct __cxx_is_always_lock_free<int> { enum { __value = 2 == ATOMIC_INT_LOCK_FREE }; }; +template<> struct __cxx_is_always_lock_free<unsigned int> { enum { __value = 2 == ATOMIC_INT_LOCK_FREE }; }; +template<> struct __cxx_is_always_lock_free<long> { enum { __value = 2 == ATOMIC_LONG_LOCK_FREE }; }; +template<> struct __cxx_is_always_lock_free<unsigned long> { enum { __value = 2 == ATOMIC_LONG_LOCK_FREE }; }; +template<> struct __cxx_is_always_lock_free<long long> { enum { __value = 2 == ATOMIC_LLONG_LOCK_FREE }; }; +template<> struct __cxx_is_always_lock_free<unsigned long long> { enum { __value = 2 == ATOMIC_LLONG_LOCK_FREE }; }; +template<typename _Tp> struct __cxx_is_always_lock_free<_Tp*> { enum { __value = 2 == ATOMIC_POINTER_LOCK_FREE }; }; +template<> struct __cxx_is_always_lock_free<std::nullptr_t> { enum { __value = 2 == ATOMIC_POINTER_LOCK_FREE }; }; + +#endif //__cpp_lib_atomic_is_always_lock_free + +template <typename _Tp, + typename _Base = typename conditional<__cxx_is_always_lock_free<_Tp>::__value, + __cxx_atomic_base_impl<_Tp>, + __cxx_atomic_lock_impl<_Tp> >::type> +#else +template <typename _Tp, + typename _Base = __cxx_atomic_base_impl<_Tp> > +#endif //_LIBCPP_ATOMIC_ONLY_USE_BUILTINS +struct __cxx_atomic_impl : public _Base { + +#if _GNUC_VER >= 501 + static_assert(is_trivially_copyable<_Tp>::value, + "std::atomic<Tp> requires that 'Tp' be a trivially copyable type"); +#endif + + _LIBCPP_INLINE_VISIBILITY __cxx_atomic_impl() _NOEXCEPT _LIBCPP_DEFAULT + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR explicit __cxx_atomic_impl(_Tp value) _NOEXCEPT + : _Base(value) {} +}; + +#if defined(__linux__) || (defined(__FreeBSD__) && defined(__mips__)) + using __cxx_contention_t = int32_t; +#else + using __cxx_contention_t = int64_t; +#endif + +using __cxx_atomic_contention_t = __cxx_atomic_impl<__cxx_contention_t>; + +#ifndef _LIBCPP_HAS_NO_PLATFORM_WAIT + +_LIBCPP_AVAILABILITY_SYNC _LIBCPP_EXPORTED_FROM_ABI void __cxx_atomic_notify_one(void const volatile*); +_LIBCPP_AVAILABILITY_SYNC _LIBCPP_EXPORTED_FROM_ABI void __cxx_atomic_notify_all(void const volatile*); +_LIBCPP_AVAILABILITY_SYNC _LIBCPP_EXPORTED_FROM_ABI __cxx_contention_t __libcpp_atomic_monitor(void const volatile*); +_LIBCPP_AVAILABILITY_SYNC _LIBCPP_EXPORTED_FROM_ABI void __libcpp_atomic_wait(void const volatile*, __cxx_contention_t); + +_LIBCPP_AVAILABILITY_SYNC _LIBCPP_EXPORTED_FROM_ABI void __cxx_atomic_notify_one(__cxx_atomic_contention_t const volatile*); +_LIBCPP_AVAILABILITY_SYNC _LIBCPP_EXPORTED_FROM_ABI void __cxx_atomic_notify_all(__cxx_atomic_contention_t const volatile*); +_LIBCPP_AVAILABILITY_SYNC _LIBCPP_EXPORTED_FROM_ABI __cxx_contention_t __libcpp_atomic_monitor(__cxx_atomic_contention_t const volatile*); +_LIBCPP_AVAILABILITY_SYNC _LIBCPP_EXPORTED_FROM_ABI void __libcpp_atomic_wait(__cxx_atomic_contention_t const volatile*, __cxx_contention_t); + +template <class _Atp, class _Fn> +struct __libcpp_atomic_wait_backoff_impl { + _Atp* __a; + _Fn __test_fn; + _LIBCPP_AVAILABILITY_SYNC + _LIBCPP_INLINE_VISIBILITY bool operator()(chrono::nanoseconds __elapsed) const + { + if(__elapsed > chrono::microseconds(64)) + { + auto const __monitor = __libcpp_atomic_monitor(__a); + if(__test_fn()) + return true; + __libcpp_atomic_wait(__a, __monitor); + } + else if(__elapsed > chrono::microseconds(4)) + __libcpp_thread_yield(); + else + {} // poll + return false; + } +}; + +template <class _Atp, class _Fn> +_LIBCPP_AVAILABILITY_SYNC +_LIBCPP_INLINE_VISIBILITY bool __cxx_atomic_wait(_Atp* __a, _Fn && __test_fn) +{ + __libcpp_atomic_wait_backoff_impl<_Atp, typename decay<_Fn>::type> __backoff_fn = {__a, __test_fn}; + return __libcpp_thread_poll_with_backoff(__test_fn, __backoff_fn); +} + +#else // _LIBCPP_HAS_NO_PLATFORM_WAIT + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY void __cxx_atomic_notify_all(__cxx_atomic_impl<_Tp> const volatile*) { } +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY void __cxx_atomic_notify_one(__cxx_atomic_impl<_Tp> const volatile*) { } +template <class _Atp, class _Fn> +_LIBCPP_INLINE_VISIBILITY bool __cxx_atomic_wait(_Atp*, _Fn && __test_fn) +{ + return __libcpp_thread_poll_with_backoff(__test_fn, __libcpp_timed_backoff_policy()); +} + +#endif // _LIBCPP_HAS_NO_PLATFORM_WAIT + +template <class _Atp, class _Tp> +struct __cxx_atomic_wait_test_fn_impl { + _Atp* __a; + _Tp __val; + memory_order __order; + _LIBCPP_INLINE_VISIBILITY bool operator()() const + { + return !__cxx_nonatomic_compare_equal(__cxx_atomic_load(__a, __order), __val); + } +}; + +template <class _Atp, class _Tp> +_LIBCPP_AVAILABILITY_SYNC +_LIBCPP_INLINE_VISIBILITY bool __cxx_atomic_wait(_Atp* __a, _Tp const __val, memory_order __order) +{ + __cxx_atomic_wait_test_fn_impl<_Atp, _Tp> __test_fn = {__a, __val, __order}; + return __cxx_atomic_wait(__a, __test_fn); +} + +// general atomic<T> + +template <class _Tp, bool = is_integral<_Tp>::value && !is_same<_Tp, bool>::value> +struct __atomic_base // false +{ + mutable __cxx_atomic_impl<_Tp> __a_; + +#if defined(__cpp_lib_atomic_is_always_lock_free) + static _LIBCPP_CONSTEXPR bool is_always_lock_free = __atomic_always_lock_free(sizeof(__a_), 0); +#endif + + _LIBCPP_INLINE_VISIBILITY + bool is_lock_free() const volatile _NOEXCEPT + {return __cxx_atomic_is_lock_free(sizeof(_Tp));} + _LIBCPP_INLINE_VISIBILITY + bool is_lock_free() const _NOEXCEPT + {return static_cast<__atomic_base const volatile*>(this)->is_lock_free();} + _LIBCPP_INLINE_VISIBILITY + void store(_Tp __d, memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT + _LIBCPP_CHECK_STORE_MEMORY_ORDER(__m) + {__cxx_atomic_store(&__a_, __d, __m);} + _LIBCPP_INLINE_VISIBILITY + void store(_Tp __d, memory_order __m = memory_order_seq_cst) _NOEXCEPT + _LIBCPP_CHECK_STORE_MEMORY_ORDER(__m) + {__cxx_atomic_store(&__a_, __d, __m);} + _LIBCPP_INLINE_VISIBILITY + _Tp load(memory_order __m = memory_order_seq_cst) const volatile _NOEXCEPT + _LIBCPP_CHECK_LOAD_MEMORY_ORDER(__m) + {return __cxx_atomic_load(&__a_, __m);} + _LIBCPP_INLINE_VISIBILITY + _Tp load(memory_order __m = memory_order_seq_cst) const _NOEXCEPT + _LIBCPP_CHECK_LOAD_MEMORY_ORDER(__m) + {return __cxx_atomic_load(&__a_, __m);} + _LIBCPP_INLINE_VISIBILITY + operator _Tp() const volatile _NOEXCEPT {return load();} + _LIBCPP_INLINE_VISIBILITY + operator _Tp() const _NOEXCEPT {return load();} + _LIBCPP_INLINE_VISIBILITY + _Tp exchange(_Tp __d, memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT + {return __cxx_atomic_exchange(&__a_, __d, __m);} + _LIBCPP_INLINE_VISIBILITY + _Tp exchange(_Tp __d, memory_order __m = memory_order_seq_cst) _NOEXCEPT + {return __cxx_atomic_exchange(&__a_, __d, __m);} + _LIBCPP_INLINE_VISIBILITY + bool compare_exchange_weak(_Tp& __e, _Tp __d, + memory_order __s, memory_order __f) volatile _NOEXCEPT + _LIBCPP_CHECK_EXCHANGE_MEMORY_ORDER(__s, __f) + {return __cxx_atomic_compare_exchange_weak(&__a_, &__e, __d, __s, __f);} + _LIBCPP_INLINE_VISIBILITY + bool compare_exchange_weak(_Tp& __e, _Tp __d, + memory_order __s, memory_order __f) _NOEXCEPT + _LIBCPP_CHECK_EXCHANGE_MEMORY_ORDER(__s, __f) + {return __cxx_atomic_compare_exchange_weak(&__a_, &__e, __d, __s, __f);} + _LIBCPP_INLINE_VISIBILITY + bool compare_exchange_strong(_Tp& __e, _Tp __d, + memory_order __s, memory_order __f) volatile _NOEXCEPT + _LIBCPP_CHECK_EXCHANGE_MEMORY_ORDER(__s, __f) + {return __cxx_atomic_compare_exchange_strong(&__a_, &__e, __d, __s, __f);} + _LIBCPP_INLINE_VISIBILITY + bool compare_exchange_strong(_Tp& __e, _Tp __d, + memory_order __s, memory_order __f) _NOEXCEPT + _LIBCPP_CHECK_EXCHANGE_MEMORY_ORDER(__s, __f) + {return __cxx_atomic_compare_exchange_strong(&__a_, &__e, __d, __s, __f);} + _LIBCPP_INLINE_VISIBILITY + bool compare_exchange_weak(_Tp& __e, _Tp __d, + memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT + {return __cxx_atomic_compare_exchange_weak(&__a_, &__e, __d, __m, __m);} + _LIBCPP_INLINE_VISIBILITY + bool compare_exchange_weak(_Tp& __e, _Tp __d, + memory_order __m = memory_order_seq_cst) _NOEXCEPT + {return __cxx_atomic_compare_exchange_weak(&__a_, &__e, __d, __m, __m);} + _LIBCPP_INLINE_VISIBILITY + bool compare_exchange_strong(_Tp& __e, _Tp __d, + memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT + {return __cxx_atomic_compare_exchange_strong(&__a_, &__e, __d, __m, __m);} + _LIBCPP_INLINE_VISIBILITY + bool compare_exchange_strong(_Tp& __e, _Tp __d, + memory_order __m = memory_order_seq_cst) _NOEXCEPT + {return __cxx_atomic_compare_exchange_strong(&__a_, &__e, __d, __m, __m);} + + _LIBCPP_AVAILABILITY_SYNC _LIBCPP_INLINE_VISIBILITY void wait(_Tp __v, memory_order __m = memory_order_seq_cst) const volatile _NOEXCEPT + {__cxx_atomic_wait(&__a_, __v, __m);} + _LIBCPP_AVAILABILITY_SYNC _LIBCPP_INLINE_VISIBILITY void wait(_Tp __v, memory_order __m = memory_order_seq_cst) const _NOEXCEPT + {__cxx_atomic_wait(&__a_, __v, __m);} + _LIBCPP_AVAILABILITY_SYNC _LIBCPP_INLINE_VISIBILITY void notify_one() volatile _NOEXCEPT + {__cxx_atomic_notify_one(&__a_);} + _LIBCPP_AVAILABILITY_SYNC _LIBCPP_INLINE_VISIBILITY void notify_one() _NOEXCEPT + {__cxx_atomic_notify_one(&__a_);} + _LIBCPP_AVAILABILITY_SYNC _LIBCPP_INLINE_VISIBILITY void notify_all() volatile _NOEXCEPT + {__cxx_atomic_notify_all(&__a_);} + _LIBCPP_AVAILABILITY_SYNC _LIBCPP_INLINE_VISIBILITY void notify_all() _NOEXCEPT + {__cxx_atomic_notify_all(&__a_);} + +#if _LIBCPP_STD_VER > 17 + _LIBCPP_INLINE_VISIBILITY constexpr + __atomic_base() noexcept(is_nothrow_default_constructible_v<_Tp>) : __a_(_Tp()) {} +#else + _LIBCPP_INLINE_VISIBILITY + __atomic_base() _NOEXCEPT _LIBCPP_DEFAULT +#endif + + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR + __atomic_base(_Tp __d) _NOEXCEPT : __a_(__d) {} + +#ifndef _LIBCPP_CXX03_LANG + __atomic_base(const __atomic_base&) = delete; +#else +private: + _LIBCPP_INLINE_VISIBILITY + __atomic_base(const __atomic_base&); +#endif +}; + +#if defined(__cpp_lib_atomic_is_always_lock_free) +template <class _Tp, bool __b> +_LIBCPP_CONSTEXPR bool __atomic_base<_Tp, __b>::is_always_lock_free; +#endif + +// atomic<Integral> + +template <class _Tp> +struct __atomic_base<_Tp, true> + : public __atomic_base<_Tp, false> +{ + typedef __atomic_base<_Tp, false> __base; + + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 + __atomic_base() _NOEXCEPT _LIBCPP_DEFAULT + + _LIBCPP_INLINE_VISIBILITY + _LIBCPP_CONSTEXPR __atomic_base(_Tp __d) _NOEXCEPT : __base(__d) {} + + _LIBCPP_INLINE_VISIBILITY + _Tp fetch_add(_Tp __op, memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT + {return __cxx_atomic_fetch_add(&this->__a_, __op, __m);} + _LIBCPP_INLINE_VISIBILITY + _Tp fetch_add(_Tp __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT + {return __cxx_atomic_fetch_add(&this->__a_, __op, __m);} + _LIBCPP_INLINE_VISIBILITY + _Tp fetch_sub(_Tp __op, memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT + {return __cxx_atomic_fetch_sub(&this->__a_, __op, __m);} + _LIBCPP_INLINE_VISIBILITY + _Tp fetch_sub(_Tp __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT + {return __cxx_atomic_fetch_sub(&this->__a_, __op, __m);} + _LIBCPP_INLINE_VISIBILITY + _Tp fetch_and(_Tp __op, memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT + {return __cxx_atomic_fetch_and(&this->__a_, __op, __m);} + _LIBCPP_INLINE_VISIBILITY + _Tp fetch_and(_Tp __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT + {return __cxx_atomic_fetch_and(&this->__a_, __op, __m);} + _LIBCPP_INLINE_VISIBILITY + _Tp fetch_or(_Tp __op, memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT + {return __cxx_atomic_fetch_or(&this->__a_, __op, __m);} + _LIBCPP_INLINE_VISIBILITY + _Tp fetch_or(_Tp __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT + {return __cxx_atomic_fetch_or(&this->__a_, __op, __m);} + _LIBCPP_INLINE_VISIBILITY + _Tp fetch_xor(_Tp __op, memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT + {return __cxx_atomic_fetch_xor(&this->__a_, __op, __m);} + _LIBCPP_INLINE_VISIBILITY + _Tp fetch_xor(_Tp __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT + {return __cxx_atomic_fetch_xor(&this->__a_, __op, __m);} + + _LIBCPP_INLINE_VISIBILITY + _Tp operator++(int) volatile _NOEXCEPT {return fetch_add(_Tp(1));} + _LIBCPP_INLINE_VISIBILITY + _Tp operator++(int) _NOEXCEPT {return fetch_add(_Tp(1));} + _LIBCPP_INLINE_VISIBILITY + _Tp operator--(int) volatile _NOEXCEPT {return fetch_sub(_Tp(1));} + _LIBCPP_INLINE_VISIBILITY + _Tp operator--(int) _NOEXCEPT {return fetch_sub(_Tp(1));} + _LIBCPP_INLINE_VISIBILITY + _Tp operator++() volatile _NOEXCEPT {return fetch_add(_Tp(1)) + _Tp(1);} + _LIBCPP_INLINE_VISIBILITY + _Tp operator++() _NOEXCEPT {return fetch_add(_Tp(1)) + _Tp(1);} + _LIBCPP_INLINE_VISIBILITY + _Tp operator--() volatile _NOEXCEPT {return fetch_sub(_Tp(1)) - _Tp(1);} + _LIBCPP_INLINE_VISIBILITY + _Tp operator--() _NOEXCEPT {return fetch_sub(_Tp(1)) - _Tp(1);} + _LIBCPP_INLINE_VISIBILITY + _Tp operator+=(_Tp __op) volatile _NOEXCEPT {return fetch_add(__op) + __op;} + _LIBCPP_INLINE_VISIBILITY + _Tp operator+=(_Tp __op) _NOEXCEPT {return fetch_add(__op) + __op;} + _LIBCPP_INLINE_VISIBILITY + _Tp operator-=(_Tp __op) volatile _NOEXCEPT {return fetch_sub(__op) - __op;} + _LIBCPP_INLINE_VISIBILITY + _Tp operator-=(_Tp __op) _NOEXCEPT {return fetch_sub(__op) - __op;} + _LIBCPP_INLINE_VISIBILITY + _Tp operator&=(_Tp __op) volatile _NOEXCEPT {return fetch_and(__op) & __op;} + _LIBCPP_INLINE_VISIBILITY + _Tp operator&=(_Tp __op) _NOEXCEPT {return fetch_and(__op) & __op;} + _LIBCPP_INLINE_VISIBILITY + _Tp operator|=(_Tp __op) volatile _NOEXCEPT {return fetch_or(__op) | __op;} + _LIBCPP_INLINE_VISIBILITY + _Tp operator|=(_Tp __op) _NOEXCEPT {return fetch_or(__op) | __op;} + _LIBCPP_INLINE_VISIBILITY + _Tp operator^=(_Tp __op) volatile _NOEXCEPT {return fetch_xor(__op) ^ __op;} + _LIBCPP_INLINE_VISIBILITY + _Tp operator^=(_Tp __op) _NOEXCEPT {return fetch_xor(__op) ^ __op;} +}; + +// atomic<T> + +template <class _Tp> +struct atomic + : public __atomic_base<_Tp> +{ + typedef __atomic_base<_Tp> __base; + typedef _Tp value_type; + typedef value_type difference_type; + +#if _LIBCPP_STD_VER > 17 + _LIBCPP_INLINE_VISIBILITY + atomic() = default; +#else + _LIBCPP_INLINE_VISIBILITY + atomic() _NOEXCEPT _LIBCPP_DEFAULT +#endif + + _LIBCPP_INLINE_VISIBILITY + _LIBCPP_CONSTEXPR atomic(_Tp __d) _NOEXCEPT : __base(__d) {} + + _LIBCPP_INLINE_VISIBILITY + _Tp operator=(_Tp __d) volatile _NOEXCEPT + {__base::store(__d); return __d;} + _LIBCPP_INLINE_VISIBILITY + _Tp operator=(_Tp __d) _NOEXCEPT + {__base::store(__d); return __d;} + + atomic& operator=(const atomic&) = delete; + atomic& operator=(const atomic&) volatile = delete; +}; + +// atomic<T*> + +template <class _Tp> +struct atomic<_Tp*> + : public __atomic_base<_Tp*> +{ + typedef __atomic_base<_Tp*> __base; + typedef _Tp* value_type; + typedef ptrdiff_t difference_type; + + _LIBCPP_INLINE_VISIBILITY + atomic() _NOEXCEPT _LIBCPP_DEFAULT + + _LIBCPP_INLINE_VISIBILITY + _LIBCPP_CONSTEXPR atomic(_Tp* __d) _NOEXCEPT : __base(__d) {} + + _LIBCPP_INLINE_VISIBILITY + _Tp* operator=(_Tp* __d) volatile _NOEXCEPT + {__base::store(__d); return __d;} + _LIBCPP_INLINE_VISIBILITY + _Tp* operator=(_Tp* __d) _NOEXCEPT + {__base::store(__d); return __d;} + + _LIBCPP_INLINE_VISIBILITY + _Tp* fetch_add(ptrdiff_t __op, memory_order __m = memory_order_seq_cst) + volatile _NOEXCEPT + {return __cxx_atomic_fetch_add(&this->__a_, __op, __m);} + _LIBCPP_INLINE_VISIBILITY + _Tp* fetch_add(ptrdiff_t __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT + {return __cxx_atomic_fetch_add(&this->__a_, __op, __m);} + _LIBCPP_INLINE_VISIBILITY + _Tp* fetch_sub(ptrdiff_t __op, memory_order __m = memory_order_seq_cst) + volatile _NOEXCEPT + {return __cxx_atomic_fetch_sub(&this->__a_, __op, __m);} + _LIBCPP_INLINE_VISIBILITY + _Tp* fetch_sub(ptrdiff_t __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT + {return __cxx_atomic_fetch_sub(&this->__a_, __op, __m);} + + _LIBCPP_INLINE_VISIBILITY + _Tp* operator++(int) volatile _NOEXCEPT {return fetch_add(1);} + _LIBCPP_INLINE_VISIBILITY + _Tp* operator++(int) _NOEXCEPT {return fetch_add(1);} + _LIBCPP_INLINE_VISIBILITY + _Tp* operator--(int) volatile _NOEXCEPT {return fetch_sub(1);} + _LIBCPP_INLINE_VISIBILITY + _Tp* operator--(int) _NOEXCEPT {return fetch_sub(1);} + _LIBCPP_INLINE_VISIBILITY + _Tp* operator++() volatile _NOEXCEPT {return fetch_add(1) + 1;} + _LIBCPP_INLINE_VISIBILITY + _Tp* operator++() _NOEXCEPT {return fetch_add(1) + 1;} + _LIBCPP_INLINE_VISIBILITY + _Tp* operator--() volatile _NOEXCEPT {return fetch_sub(1) - 1;} + _LIBCPP_INLINE_VISIBILITY + _Tp* operator--() _NOEXCEPT {return fetch_sub(1) - 1;} + _LIBCPP_INLINE_VISIBILITY + _Tp* operator+=(ptrdiff_t __op) volatile _NOEXCEPT {return fetch_add(__op) + __op;} + _LIBCPP_INLINE_VISIBILITY + _Tp* operator+=(ptrdiff_t __op) _NOEXCEPT {return fetch_add(__op) + __op;} + _LIBCPP_INLINE_VISIBILITY + _Tp* operator-=(ptrdiff_t __op) volatile _NOEXCEPT {return fetch_sub(__op) - __op;} + _LIBCPP_INLINE_VISIBILITY + _Tp* operator-=(ptrdiff_t __op) _NOEXCEPT {return fetch_sub(__op) - __op;} + + atomic& operator=(const atomic&) = delete; + atomic& operator=(const atomic&) volatile = delete; +}; + +// atomic_is_lock_free + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +bool +atomic_is_lock_free(const volatile atomic<_Tp>* __o) _NOEXCEPT +{ + return __o->is_lock_free(); +} + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +bool +atomic_is_lock_free(const atomic<_Tp>* __o) _NOEXCEPT +{ + return __o->is_lock_free(); +} + +// atomic_init + +template <class _Tp> +_LIBCPP_DEPRECATED_IN_CXX20 _LIBCPP_INLINE_VISIBILITY +void +atomic_init(volatile atomic<_Tp>* __o, typename atomic<_Tp>::value_type __d) _NOEXCEPT +{ + __cxx_atomic_init(&__o->__a_, __d); +} + +template <class _Tp> +_LIBCPP_DEPRECATED_IN_CXX20 _LIBCPP_INLINE_VISIBILITY +void +atomic_init(atomic<_Tp>* __o, typename atomic<_Tp>::value_type __d) _NOEXCEPT +{ + __cxx_atomic_init(&__o->__a_, __d); +} + +// atomic_store + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +void +atomic_store(volatile atomic<_Tp>* __o, typename atomic<_Tp>::value_type __d) _NOEXCEPT +{ + __o->store(__d); +} + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +void +atomic_store(atomic<_Tp>* __o, typename atomic<_Tp>::value_type __d) _NOEXCEPT +{ + __o->store(__d); +} + +// atomic_store_explicit + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +void +atomic_store_explicit(volatile atomic<_Tp>* __o, typename atomic<_Tp>::value_type __d, memory_order __m) _NOEXCEPT + _LIBCPP_CHECK_STORE_MEMORY_ORDER(__m) +{ + __o->store(__d, __m); +} + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +void +atomic_store_explicit(atomic<_Tp>* __o, typename atomic<_Tp>::value_type __d, memory_order __m) _NOEXCEPT + _LIBCPP_CHECK_STORE_MEMORY_ORDER(__m) +{ + __o->store(__d, __m); +} + +// atomic_load + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp +atomic_load(const volatile atomic<_Tp>* __o) _NOEXCEPT +{ + return __o->load(); +} + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp +atomic_load(const atomic<_Tp>* __o) _NOEXCEPT +{ + return __o->load(); +} + +// atomic_load_explicit + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp +atomic_load_explicit(const volatile atomic<_Tp>* __o, memory_order __m) _NOEXCEPT + _LIBCPP_CHECK_LOAD_MEMORY_ORDER(__m) +{ + return __o->load(__m); +} + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp +atomic_load_explicit(const atomic<_Tp>* __o, memory_order __m) _NOEXCEPT + _LIBCPP_CHECK_LOAD_MEMORY_ORDER(__m) +{ + return __o->load(__m); +} + +// atomic_exchange + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp +atomic_exchange(volatile atomic<_Tp>* __o, typename atomic<_Tp>::value_type __d) _NOEXCEPT +{ + return __o->exchange(__d); +} + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp +atomic_exchange(atomic<_Tp>* __o, typename atomic<_Tp>::value_type __d) _NOEXCEPT +{ + return __o->exchange(__d); +} + +// atomic_exchange_explicit + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp +atomic_exchange_explicit(volatile atomic<_Tp>* __o, typename atomic<_Tp>::value_type __d, memory_order __m) _NOEXCEPT +{ + return __o->exchange(__d, __m); +} + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp +atomic_exchange_explicit(atomic<_Tp>* __o, typename atomic<_Tp>::value_type __d, memory_order __m) _NOEXCEPT +{ + return __o->exchange(__d, __m); +} + +// atomic_compare_exchange_weak + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +bool +atomic_compare_exchange_weak(volatile atomic<_Tp>* __o, typename atomic<_Tp>::value_type* __e, typename atomic<_Tp>::value_type __d) _NOEXCEPT +{ + return __o->compare_exchange_weak(*__e, __d); +} + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +bool +atomic_compare_exchange_weak(atomic<_Tp>* __o, typename atomic<_Tp>::value_type* __e, typename atomic<_Tp>::value_type __d) _NOEXCEPT +{ + return __o->compare_exchange_weak(*__e, __d); +} + +// atomic_compare_exchange_strong + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +bool +atomic_compare_exchange_strong(volatile atomic<_Tp>* __o, typename atomic<_Tp>::value_type* __e, typename atomic<_Tp>::value_type __d) _NOEXCEPT +{ + return __o->compare_exchange_strong(*__e, __d); +} + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +bool +atomic_compare_exchange_strong(atomic<_Tp>* __o, typename atomic<_Tp>::value_type* __e, typename atomic<_Tp>::value_type __d) _NOEXCEPT +{ + return __o->compare_exchange_strong(*__e, __d); +} + +// atomic_compare_exchange_weak_explicit + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +bool +atomic_compare_exchange_weak_explicit(volatile atomic<_Tp>* __o, typename atomic<_Tp>::value_type* __e, + typename atomic<_Tp>::value_type __d, + memory_order __s, memory_order __f) _NOEXCEPT + _LIBCPP_CHECK_EXCHANGE_MEMORY_ORDER(__s, __f) +{ + return __o->compare_exchange_weak(*__e, __d, __s, __f); +} + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +bool +atomic_compare_exchange_weak_explicit(atomic<_Tp>* __o, typename atomic<_Tp>::value_type* __e, typename atomic<_Tp>::value_type __d, + memory_order __s, memory_order __f) _NOEXCEPT + _LIBCPP_CHECK_EXCHANGE_MEMORY_ORDER(__s, __f) +{ + return __o->compare_exchange_weak(*__e, __d, __s, __f); +} + +// atomic_compare_exchange_strong_explicit + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +bool +atomic_compare_exchange_strong_explicit(volatile atomic<_Tp>* __o, + typename atomic<_Tp>::value_type* __e, typename atomic<_Tp>::value_type __d, + memory_order __s, memory_order __f) _NOEXCEPT + _LIBCPP_CHECK_EXCHANGE_MEMORY_ORDER(__s, __f) +{ + return __o->compare_exchange_strong(*__e, __d, __s, __f); +} + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +bool +atomic_compare_exchange_strong_explicit(atomic<_Tp>* __o, typename atomic<_Tp>::value_type* __e, + typename atomic<_Tp>::value_type __d, + memory_order __s, memory_order __f) _NOEXCEPT + _LIBCPP_CHECK_EXCHANGE_MEMORY_ORDER(__s, __f) +{ + return __o->compare_exchange_strong(*__e, __d, __s, __f); +} + +// atomic_wait + +template <class _Tp> +_LIBCPP_AVAILABILITY_SYNC _LIBCPP_INLINE_VISIBILITY +void atomic_wait(const volatile atomic<_Tp>* __o, + typename atomic<_Tp>::value_type __v) _NOEXCEPT +{ + return __o->wait(__v); +} + +template <class _Tp> +_LIBCPP_AVAILABILITY_SYNC _LIBCPP_INLINE_VISIBILITY +void atomic_wait(const atomic<_Tp>* __o, + typename atomic<_Tp>::value_type __v) _NOEXCEPT +{ + return __o->wait(__v); +} + +// atomic_wait_explicit + +template <class _Tp> +_LIBCPP_AVAILABILITY_SYNC _LIBCPP_INLINE_VISIBILITY +void atomic_wait_explicit(const volatile atomic<_Tp>* __o, + typename atomic<_Tp>::value_type __v, + memory_order __m) _NOEXCEPT + _LIBCPP_CHECK_LOAD_MEMORY_ORDER(__m) +{ + return __o->wait(__v, __m); +} + +template <class _Tp> +_LIBCPP_AVAILABILITY_SYNC _LIBCPP_INLINE_VISIBILITY +void atomic_wait_explicit(const atomic<_Tp>* __o, + typename atomic<_Tp>::value_type __v, + memory_order __m) _NOEXCEPT + _LIBCPP_CHECK_LOAD_MEMORY_ORDER(__m) +{ + return __o->wait(__v, __m); +} + +// atomic_notify_one + +template <class _Tp> +_LIBCPP_AVAILABILITY_SYNC _LIBCPP_INLINE_VISIBILITY +void atomic_notify_one(volatile atomic<_Tp>* __o) _NOEXCEPT +{ + __o->notify_one(); +} +template <class _Tp> +_LIBCPP_AVAILABILITY_SYNC _LIBCPP_INLINE_VISIBILITY +void atomic_notify_one(atomic<_Tp>* __o) _NOEXCEPT +{ + __o->notify_one(); +} + +// atomic_notify_one + +template <class _Tp> +_LIBCPP_AVAILABILITY_SYNC _LIBCPP_INLINE_VISIBILITY +void atomic_notify_all(volatile atomic<_Tp>* __o) _NOEXCEPT +{ + __o->notify_all(); +} +template <class _Tp> +_LIBCPP_AVAILABILITY_SYNC _LIBCPP_INLINE_VISIBILITY +void atomic_notify_all(atomic<_Tp>* __o) _NOEXCEPT +{ + __o->notify_all(); +} + +// atomic_fetch_add + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +typename enable_if +< + is_integral<_Tp>::value && !is_same<_Tp, bool>::value && !is_const<_Tp>::value, + _Tp +>::type +atomic_fetch_add(volatile atomic<_Tp>* __o, typename atomic<_Tp>::difference_type __op) _NOEXCEPT +{ + return __o->fetch_add(__op); +} + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +typename enable_if +< + is_integral<_Tp>::value && !is_same<_Tp, bool>::value && !is_const<_Tp>::value, + _Tp +>::type +atomic_fetch_add(atomic<_Tp>* __o, typename atomic<_Tp>::difference_type __op) _NOEXCEPT +{ + return __o->fetch_add(__op); +} + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp* +atomic_fetch_add(volatile atomic<_Tp*>* __o, typename atomic<_Tp*>::difference_type __op) _NOEXCEPT +{ + return __o->fetch_add(__op); +} + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp* +atomic_fetch_add(atomic<_Tp*>* __o, typename atomic<_Tp*>::difference_type __op) _NOEXCEPT +{ + return __o->fetch_add(__op); +} + +// atomic_fetch_add_explicit + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +typename enable_if +< + is_integral<_Tp>::value && !is_same<_Tp, bool>::value && !is_const<_Tp>::value, + _Tp +>::type +atomic_fetch_add_explicit(volatile atomic<_Tp>* __o, typename atomic<_Tp>::difference_type __op, memory_order __m) _NOEXCEPT +{ + return __o->fetch_add(__op, __m); +} + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +typename enable_if +< + is_integral<_Tp>::value && !is_same<_Tp, bool>::value && !is_const<_Tp>::value, + _Tp +>::type +atomic_fetch_add_explicit(atomic<_Tp>* __o, typename atomic<_Tp>::difference_type __op, memory_order __m) _NOEXCEPT +{ + return __o->fetch_add(__op, __m); +} + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp* +atomic_fetch_add_explicit(volatile atomic<_Tp*>* __o, typename atomic<_Tp*>::difference_type __op, memory_order __m) _NOEXCEPT +{ + return __o->fetch_add(__op, __m); +} + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp* +atomic_fetch_add_explicit(atomic<_Tp*>* __o, typename atomic<_Tp*>::difference_type __op, memory_order __m) _NOEXCEPT +{ + return __o->fetch_add(__op, __m); +} + +// atomic_fetch_sub + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +typename enable_if +< + is_integral<_Tp>::value && !is_same<_Tp, bool>::value && !is_const<_Tp>::value, + _Tp +>::type +atomic_fetch_sub(volatile atomic<_Tp>* __o, typename atomic<_Tp>::difference_type __op) _NOEXCEPT +{ + return __o->fetch_sub(__op); +} + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +typename enable_if +< + is_integral<_Tp>::value && !is_same<_Tp, bool>::value && !is_const<_Tp>::value, + _Tp +>::type +atomic_fetch_sub(atomic<_Tp>* __o, typename atomic<_Tp>::difference_type __op) _NOEXCEPT +{ + return __o->fetch_sub(__op); +} + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp* +atomic_fetch_sub(volatile atomic<_Tp*>* __o, typename atomic<_Tp*>::difference_type __op) _NOEXCEPT +{ + return __o->fetch_sub(__op); +} + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp* +atomic_fetch_sub(atomic<_Tp*>* __o, typename atomic<_Tp*>::difference_type __op) _NOEXCEPT +{ + return __o->fetch_sub(__op); +} + +// atomic_fetch_sub_explicit + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +typename enable_if +< + is_integral<_Tp>::value && !is_same<_Tp, bool>::value && !is_const<_Tp>::value, + _Tp +>::type +atomic_fetch_sub_explicit(volatile atomic<_Tp>* __o, typename atomic<_Tp>::difference_type __op, memory_order __m) _NOEXCEPT +{ + return __o->fetch_sub(__op, __m); +} + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +typename enable_if +< + is_integral<_Tp>::value && !is_same<_Tp, bool>::value && !is_const<_Tp>::value, + _Tp +>::type +atomic_fetch_sub_explicit(atomic<_Tp>* __o, typename atomic<_Tp>::difference_type __op, memory_order __m) _NOEXCEPT +{ + return __o->fetch_sub(__op, __m); +} + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp* +atomic_fetch_sub_explicit(volatile atomic<_Tp*>* __o, typename atomic<_Tp*>::difference_type __op, memory_order __m) _NOEXCEPT +{ + return __o->fetch_sub(__op, __m); +} + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +_Tp* +atomic_fetch_sub_explicit(atomic<_Tp*>* __o, typename atomic<_Tp*>::difference_type __op, memory_order __m) _NOEXCEPT +{ + return __o->fetch_sub(__op, __m); +} + +// atomic_fetch_and + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +typename enable_if +< + is_integral<_Tp>::value && !is_same<_Tp, bool>::value, + _Tp +>::type +atomic_fetch_and(volatile atomic<_Tp>* __o, typename atomic<_Tp>::value_type __op) _NOEXCEPT +{ + return __o->fetch_and(__op); +} + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +typename enable_if +< + is_integral<_Tp>::value && !is_same<_Tp, bool>::value, + _Tp +>::type +atomic_fetch_and(atomic<_Tp>* __o, typename atomic<_Tp>::value_type __op) _NOEXCEPT +{ + return __o->fetch_and(__op); +} + +// atomic_fetch_and_explicit + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +typename enable_if +< + is_integral<_Tp>::value && !is_same<_Tp, bool>::value, + _Tp +>::type +atomic_fetch_and_explicit(volatile atomic<_Tp>* __o, typename atomic<_Tp>::value_type __op, memory_order __m) _NOEXCEPT +{ + return __o->fetch_and(__op, __m); +} + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +typename enable_if +< + is_integral<_Tp>::value && !is_same<_Tp, bool>::value, + _Tp +>::type +atomic_fetch_and_explicit(atomic<_Tp>* __o, typename atomic<_Tp>::value_type __op, memory_order __m) _NOEXCEPT +{ + return __o->fetch_and(__op, __m); +} + +// atomic_fetch_or + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +typename enable_if +< + is_integral<_Tp>::value && !is_same<_Tp, bool>::value, + _Tp +>::type +atomic_fetch_or(volatile atomic<_Tp>* __o, typename atomic<_Tp>::value_type __op) _NOEXCEPT +{ + return __o->fetch_or(__op); +} + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +typename enable_if +< + is_integral<_Tp>::value && !is_same<_Tp, bool>::value, + _Tp +>::type +atomic_fetch_or(atomic<_Tp>* __o, typename atomic<_Tp>::value_type __op) _NOEXCEPT +{ + return __o->fetch_or(__op); +} + +// atomic_fetch_or_explicit + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +typename enable_if +< + is_integral<_Tp>::value && !is_same<_Tp, bool>::value, + _Tp +>::type +atomic_fetch_or_explicit(volatile atomic<_Tp>* __o, typename atomic<_Tp>::value_type __op, memory_order __m) _NOEXCEPT +{ + return __o->fetch_or(__op, __m); +} + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +typename enable_if +< + is_integral<_Tp>::value && !is_same<_Tp, bool>::value, + _Tp +>::type +atomic_fetch_or_explicit(atomic<_Tp>* __o, typename atomic<_Tp>::value_type __op, memory_order __m) _NOEXCEPT +{ + return __o->fetch_or(__op, __m); +} + +// atomic_fetch_xor + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +typename enable_if +< + is_integral<_Tp>::value && !is_same<_Tp, bool>::value, + _Tp +>::type +atomic_fetch_xor(volatile atomic<_Tp>* __o, typename atomic<_Tp>::value_type __op) _NOEXCEPT +{ + return __o->fetch_xor(__op); +} + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +typename enable_if +< + is_integral<_Tp>::value && !is_same<_Tp, bool>::value, + _Tp +>::type +atomic_fetch_xor(atomic<_Tp>* __o, typename atomic<_Tp>::value_type __op) _NOEXCEPT +{ + return __o->fetch_xor(__op); +} + +// atomic_fetch_xor_explicit + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +typename enable_if +< + is_integral<_Tp>::value && !is_same<_Tp, bool>::value, + _Tp +>::type +atomic_fetch_xor_explicit(volatile atomic<_Tp>* __o, typename atomic<_Tp>::value_type __op, memory_order __m) _NOEXCEPT +{ + return __o->fetch_xor(__op, __m); +} + +template <class _Tp> +_LIBCPP_INLINE_VISIBILITY +typename enable_if +< + is_integral<_Tp>::value && !is_same<_Tp, bool>::value, + _Tp +>::type +atomic_fetch_xor_explicit(atomic<_Tp>* __o, typename atomic<_Tp>::value_type __op, memory_order __m) _NOEXCEPT +{ + return __o->fetch_xor(__op, __m); +} + +// flag type and operations + +typedef struct atomic_flag +{ + __cxx_atomic_impl<_LIBCPP_ATOMIC_FLAG_TYPE> __a_; + + _LIBCPP_INLINE_VISIBILITY + bool test(memory_order __m = memory_order_seq_cst) const volatile _NOEXCEPT + {return _LIBCPP_ATOMIC_FLAG_TYPE(true) == __cxx_atomic_load(&__a_, __m);} + _LIBCPP_INLINE_VISIBILITY + bool test(memory_order __m = memory_order_seq_cst) const _NOEXCEPT + {return _LIBCPP_ATOMIC_FLAG_TYPE(true) == __cxx_atomic_load(&__a_, __m);} + + _LIBCPP_INLINE_VISIBILITY + bool test_and_set(memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT + {return __cxx_atomic_exchange(&__a_, _LIBCPP_ATOMIC_FLAG_TYPE(true), __m);} + _LIBCPP_INLINE_VISIBILITY + bool test_and_set(memory_order __m = memory_order_seq_cst) _NOEXCEPT + {return __cxx_atomic_exchange(&__a_, _LIBCPP_ATOMIC_FLAG_TYPE(true), __m);} + _LIBCPP_INLINE_VISIBILITY + void clear(memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT + {__cxx_atomic_store(&__a_, _LIBCPP_ATOMIC_FLAG_TYPE(false), __m);} + _LIBCPP_INLINE_VISIBILITY + void clear(memory_order __m = memory_order_seq_cst) _NOEXCEPT + {__cxx_atomic_store(&__a_, _LIBCPP_ATOMIC_FLAG_TYPE(false), __m);} + + _LIBCPP_AVAILABILITY_SYNC _LIBCPP_INLINE_VISIBILITY + void wait(bool __v, memory_order __m = memory_order_seq_cst) const volatile _NOEXCEPT + {__cxx_atomic_wait(&__a_, _LIBCPP_ATOMIC_FLAG_TYPE(__v), __m);} + _LIBCPP_AVAILABILITY_SYNC _LIBCPP_INLINE_VISIBILITY + void wait(bool __v, memory_order __m = memory_order_seq_cst) const _NOEXCEPT + {__cxx_atomic_wait(&__a_, _LIBCPP_ATOMIC_FLAG_TYPE(__v), __m);} + _LIBCPP_AVAILABILITY_SYNC _LIBCPP_INLINE_VISIBILITY + void notify_one() volatile _NOEXCEPT + {__cxx_atomic_notify_one(&__a_);} + _LIBCPP_AVAILABILITY_SYNC _LIBCPP_INLINE_VISIBILITY + void notify_one() _NOEXCEPT + {__cxx_atomic_notify_one(&__a_);} + _LIBCPP_AVAILABILITY_SYNC _LIBCPP_INLINE_VISIBILITY + void notify_all() volatile _NOEXCEPT + {__cxx_atomic_notify_all(&__a_);} + _LIBCPP_AVAILABILITY_SYNC _LIBCPP_INLINE_VISIBILITY + void notify_all() _NOEXCEPT + {__cxx_atomic_notify_all(&__a_);} + +#if _LIBCPP_STD_VER > 17 + _LIBCPP_INLINE_VISIBILITY constexpr + atomic_flag() _NOEXCEPT : __a_(false) {} +#else + _LIBCPP_INLINE_VISIBILITY + atomic_flag() _NOEXCEPT _LIBCPP_DEFAULT +#endif + + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR + atomic_flag(bool __b) _NOEXCEPT : __a_(__b) {} // EXTENSION + +#ifndef _LIBCPP_CXX03_LANG + atomic_flag(const atomic_flag&) = delete; + atomic_flag& operator=(const atomic_flag&) = delete; + atomic_flag& operator=(const atomic_flag&) volatile = delete; +#else +private: + _LIBCPP_INLINE_VISIBILITY + atomic_flag(const atomic_flag&); + _LIBCPP_INLINE_VISIBILITY + atomic_flag& operator=(const atomic_flag&); + _LIBCPP_INLINE_VISIBILITY + atomic_flag& operator=(const atomic_flag&) volatile; +#endif +} atomic_flag; + + +inline _LIBCPP_INLINE_VISIBILITY +bool +atomic_flag_test(const volatile atomic_flag* __o) _NOEXCEPT +{ + return __o->test(); +} + +inline _LIBCPP_INLINE_VISIBILITY +bool +atomic_flag_test(const atomic_flag* __o) _NOEXCEPT +{ + return __o->test(); +} + +inline _LIBCPP_INLINE_VISIBILITY +bool +atomic_flag_test_explicit(const volatile atomic_flag* __o, memory_order __m) _NOEXCEPT +{ + return __o->test(__m); +} + +inline _LIBCPP_INLINE_VISIBILITY +bool +atomic_flag_test_explicit(const atomic_flag* __o, memory_order __m) _NOEXCEPT +{ + return __o->test(__m); +} + +inline _LIBCPP_INLINE_VISIBILITY +bool +atomic_flag_test_and_set(volatile atomic_flag* __o) _NOEXCEPT +{ + return __o->test_and_set(); +} + +inline _LIBCPP_INLINE_VISIBILITY +bool +atomic_flag_test_and_set(atomic_flag* __o) _NOEXCEPT +{ + return __o->test_and_set(); +} + +inline _LIBCPP_INLINE_VISIBILITY +bool +atomic_flag_test_and_set_explicit(volatile atomic_flag* __o, memory_order __m) _NOEXCEPT +{ + return __o->test_and_set(__m); +} + +inline _LIBCPP_INLINE_VISIBILITY +bool +atomic_flag_test_and_set_explicit(atomic_flag* __o, memory_order __m) _NOEXCEPT +{ + return __o->test_and_set(__m); +} + +inline _LIBCPP_INLINE_VISIBILITY +void +atomic_flag_clear(volatile atomic_flag* __o) _NOEXCEPT +{ + __o->clear(); +} + +inline _LIBCPP_INLINE_VISIBILITY +void +atomic_flag_clear(atomic_flag* __o) _NOEXCEPT +{ + __o->clear(); +} + +inline _LIBCPP_INLINE_VISIBILITY +void +atomic_flag_clear_explicit(volatile atomic_flag* __o, memory_order __m) _NOEXCEPT +{ + __o->clear(__m); +} + +inline _LIBCPP_INLINE_VISIBILITY +void +atomic_flag_clear_explicit(atomic_flag* __o, memory_order __m) _NOEXCEPT +{ + __o->clear(__m); +} + +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_AVAILABILITY_SYNC +void +atomic_flag_wait(const volatile atomic_flag* __o, bool __v) _NOEXCEPT +{ + __o->wait(__v); +} + +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_AVAILABILITY_SYNC +void +atomic_flag_wait(const atomic_flag* __o, bool __v) _NOEXCEPT +{ + __o->wait(__v); +} + +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_AVAILABILITY_SYNC +void +atomic_flag_wait_explicit(const volatile atomic_flag* __o, + bool __v, memory_order __m) _NOEXCEPT +{ + __o->wait(__v, __m); +} + +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_AVAILABILITY_SYNC +void +atomic_flag_wait_explicit(const atomic_flag* __o, + bool __v, memory_order __m) _NOEXCEPT +{ + __o->wait(__v, __m); +} + +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_AVAILABILITY_SYNC +void +atomic_flag_notify_one(volatile atomic_flag* __o) _NOEXCEPT +{ + __o->notify_one(); +} + +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_AVAILABILITY_SYNC +void +atomic_flag_notify_one(atomic_flag* __o) _NOEXCEPT +{ + __o->notify_one(); +} + +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_AVAILABILITY_SYNC +void +atomic_flag_notify_all(volatile atomic_flag* __o) _NOEXCEPT +{ + __o->notify_all(); +} + +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_AVAILABILITY_SYNC +void +atomic_flag_notify_all(atomic_flag* __o) _NOEXCEPT +{ + __o->notify_all(); +} + +// fences + +inline _LIBCPP_INLINE_VISIBILITY +void +atomic_thread_fence(memory_order __m) _NOEXCEPT +{ + __cxx_atomic_thread_fence(__m); +} + +inline _LIBCPP_INLINE_VISIBILITY +void +atomic_signal_fence(memory_order __m) _NOEXCEPT +{ + __cxx_atomic_signal_fence(__m); +} + +// 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; +#ifndef _LIBCPP_HAS_NO_CHAR8_T +typedef atomic<char8_t> atomic_char8_t; +#endif +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; + +// atomic_*_lock_free : prefer the contention type most highly, then the largest lock-free type + +#ifdef __cpp_lib_atomic_is_always_lock_free +# define _LIBCPP_CONTENTION_LOCK_FREE __atomic_always_lock_free(sizeof(__cxx_contention_t), 0) +#else +# define _LIBCPP_CONTENTION_LOCK_FREE false +#endif + +#if ATOMIC_LLONG_LOCK_FREE == 2 +typedef conditional<_LIBCPP_CONTENTION_LOCK_FREE, __cxx_contention_t, long long>::type __libcpp_signed_lock_free; +typedef conditional<_LIBCPP_CONTENTION_LOCK_FREE, __cxx_contention_t, unsigned long long>::type __libcpp_unsigned_lock_free; +#elif ATOMIC_INT_LOCK_FREE == 2 +typedef conditional<_LIBCPP_CONTENTION_LOCK_FREE, __cxx_contention_t, int>::type __libcpp_signed_lock_free; +typedef conditional<_LIBCPP_CONTENTION_LOCK_FREE, __cxx_contention_t, unsigned int>::type __libcpp_unsigned_lock_free; +#elif ATOMIC_SHORT_LOCK_FREE == 2 +typedef conditional<_LIBCPP_CONTENTION_LOCK_FREE, __cxx_contention_t, short>::type __libcpp_signed_lock_free; +typedef conditional<_LIBCPP_CONTENTION_LOCK_FREE, __cxx_contention_t, unsigned short>::type __libcpp_unsigned_lock_free; +#elif ATOMIC_CHAR_LOCK_FREE == 2 +typedef conditional<_LIBCPP_CONTENTION_LOCK_FREE, __cxx_contention_t, char>::type __libcpp_signed_lock_free; +typedef conditional<_LIBCPP_CONTENTION_LOCK_FREE, __cxx_contention_t, unsigned char>::type __libcpp_unsigned_lock_free; +#else + // No signed/unsigned lock-free types +#endif + +typedef atomic<__libcpp_signed_lock_free> atomic_signed_lock_free; +typedef atomic<__libcpp_unsigned_lock_free> atomic_unsigned_lock_free; + +#define ATOMIC_FLAG_INIT {false} +#define ATOMIC_VAR_INIT(__v) {__v} + +_LIBCPP_END_NAMESPACE_STD + +#endif // _LIBCPP_ATOMIC |