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+// -*- C++ -*-
+//===--------------------------- atomic -----------------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef _LIBCPP_ATOMIC
+#define _LIBCPP_ATOMIC
+
+/*
+ atomic synopsis
+
+namespace std
+{
+
+// feature test macro
+
+#define __cpp_lib_atomic_is_always_lock_free // as specified by SG10
+
+// order and consistency
+
+typedef enum memory_order
+{
+ memory_order_relaxed,
+ memory_order_consume, // load-consume
+ memory_order_acquire, // load-acquire
+ memory_order_release, // store-release
+ memory_order_acq_rel, // store-release load-acquire
+ memory_order_seq_cst // store-release load-acquire
+} memory_order;
+
+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_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
+
+// flag type and operations
+
+typedef struct atomic_flag
+{
+ 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;
+ atomic_flag() noexcept = default;
+ atomic_flag(const atomic_flag&) = delete;
+ atomic_flag& operator=(const atomic_flag&) = delete;
+ atomic_flag& operator=(const atomic_flag&) volatile = delete;
+} atomic_flag;
+
+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;
+
+#define ATOMIC_FLAG_INIT see below
+#define ATOMIC_VAR_INIT(value) see below
+
+template <class T>
+struct atomic
+{
+ static constexpr bool is_always_lock_free;
+ bool is_lock_free() const volatile noexcept;
+ bool is_lock_free() 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 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;
+ 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;
+
+ atomic() noexcept = default;
+ constexpr atomic(T desr) noexcept;
+ atomic(const atomic&) = delete;
+ atomic& operator=(const atomic&) = delete;
+ atomic& operator=(const atomic&) volatile = delete;
+ T operator=(T) volatile noexcept;
+ T operator=(T) noexcept;
+};
+
+template <>
+struct atomic<integral>
+{
+ static constexpr bool is_always_lock_free;
+ bool is_lock_free() const volatile noexcept;
+ bool is_lock_free() 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 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;
+ 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;
+
+ atomic() noexcept = default;
+ constexpr atomic(integral desr) noexcept;
+ atomic(const atomic&) = delete;
+ atomic& operator=(const atomic&) = delete;
+ atomic& operator=(const atomic&) volatile = delete;
+ integral operator=(integral desr) volatile noexcept;
+ integral operator=(integral desr) 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;
+};
+
+template <class T>
+struct atomic<T*>
+{
+ static constexpr bool is_always_lock_free;
+ bool is_lock_free() const volatile noexcept;
+ bool is_lock_free() 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* 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;
+ 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;
+
+ atomic() noexcept = default;
+ constexpr atomic(T* desr) noexcept;
+ atomic(const atomic&) = delete;
+ atomic& operator=(const atomic&) = delete;
+ atomic& operator=(const atomic&) volatile = delete;
+
+ T* operator=(T*) volatile noexcept;
+ T* operator=(T*) 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;
+};
+
+
+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_init(volatile atomic<T>* obj, T desr) noexcept;
+
+template <class T>
+ void
+ atomic_init(atomic<T>* obj, T desr) 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 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<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;
+
+// fences
+
+void atomic_thread_fence(memory_order m) noexcept;
+void atomic_signal_fence(memory_order m) noexcept;
+
+} // std
+
+*/
+
+#include <__config>
+#include <cstddef>
+#include <cstdint>
+#include <type_traits>
+
+#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
+#if !defined(_LIBCPP_HAS_C_ATOMIC_IMP) && !defined(_LIBCPP_HAS_GCC_ATOMIC_IMP)
+#error <atomic> is not implemented
+#endif
+#ifdef kill_dependency
+#error C++ standard library is incompatible with <stdatomic.h>
+#endif
+
+#if _LIBCPP_STD_VER > 14
+# define __cpp_lib_atomic_is_always_lock_free 201603L
+#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
+
+typedef enum memory_order
+{
+ memory_order_relaxed, memory_order_consume, memory_order_acquire,
+ memory_order_release, memory_order_acq_rel, memory_order_seq_cst
+} memory_order;
+
+#if defined(_LIBCPP_HAS_GCC_ATOMIC_IMP)
+namespace __gcc_atomic {
+template <typename _Tp>
+struct __gcc_atomic_t {
+
+#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
+#ifndef _LIBCPP_CXX03_LANG
+ __gcc_atomic_t() _NOEXCEPT = default;
+#else
+ __gcc_atomic_t() _NOEXCEPT : __a_value() {}
+#endif // _LIBCPP_CXX03_LANG
+ _LIBCPP_CONSTEXPR explicit __gcc_atomic_t(_Tp value) _NOEXCEPT
+ : __a_value(value) {}
+ _Tp __a_value;
+};
+#define _Atomic(x) __gcc_atomic::__gcc_atomic_t<x>
+
+template <typename _Tp> _Tp __create();
+
+template <typename _Tp, typename _Td>
+typename enable_if<sizeof(_Tp()->__a_value = __create<_Td>()), char>::type
+ __test_atomic_assignable(int);
+template <typename _Tp, typename _Up>
+__two __test_atomic_assignable(...);
+
+template <typename _Tp, typename _Td>
+struct __can_assign {
+ static const bool value =
+ sizeof(__test_atomic_assignable<_Tp, _Td>(1)) == sizeof(char);
+};
+
+static 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))));
+}
+
+static 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))));
+}
+
+} // namespace __gcc_atomic
+
+template <typename _Tp>
+static inline
+typename enable_if<
+ __gcc_atomic::__can_assign<volatile _Atomic(_Tp)*, _Tp>::value>::type
+__c11_atomic_init(volatile _Atomic(_Tp)* __a, _Tp __val) {
+ __a->__a_value = __val;
+}
+
+template <typename _Tp>
+static inline
+typename enable_if<
+ !__gcc_atomic::__can_assign<volatile _Atomic(_Tp)*, _Tp>::value &&
+ __gcc_atomic::__can_assign< _Atomic(_Tp)*, _Tp>::value>::type
+__c11_atomic_init(volatile _Atomic(_Tp)* __a, _Tp __val) {
+ // [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.
+ volatile char* to = reinterpret_cast<volatile char*>(&__a->__a_value);
+ volatile char* end = to + sizeof(_Tp);
+ char* from = reinterpret_cast<char*>(&__val);
+ while (to != end) {
+ *to++ = *from++;
+ }
+}
+
+template <typename _Tp>
+static inline void __c11_atomic_init(_Atomic(_Tp)* __a, _Tp __val) {
+ __a->__a_value = __val;
+}
+
+static inline void __c11_atomic_thread_fence(memory_order __order) {
+ __atomic_thread_fence(__gcc_atomic::__to_gcc_order(__order));
+}
+
+static inline void __c11_atomic_signal_fence(memory_order __order) {
+ __atomic_signal_fence(__gcc_atomic::__to_gcc_order(__order));
+}
+
+template <typename _Tp>
+static inline void __c11_atomic_store(volatile _Atomic(_Tp)* __a, _Tp __val,
+ memory_order __order) {
+ return __atomic_store(&__a->__a_value, &__val,
+ __gcc_atomic::__to_gcc_order(__order));
+}
+
+template <typename _Tp>
+static inline void __c11_atomic_store(_Atomic(_Tp)* __a, _Tp __val,
+ memory_order __order) {
+ __atomic_store(&__a->__a_value, &__val,
+ __gcc_atomic::__to_gcc_order(__order));
+}
+
+template <typename _Tp>
+static inline _Tp __c11_atomic_load(volatile _Atomic(_Tp)* __a,
+ memory_order __order) {
+ _Tp __ret;
+ __atomic_load(&__a->__a_value, &__ret,
+ __gcc_atomic::__to_gcc_order(__order));
+ return __ret;
+}
+
+template <typename _Tp>
+static inline _Tp __c11_atomic_load(_Atomic(_Tp)* __a, memory_order __order) {
+ _Tp __ret;
+ __atomic_load(&__a->__a_value, &__ret,
+ __gcc_atomic::__to_gcc_order(__order));
+ return __ret;
+}
+
+template <typename _Tp>
+static inline _Tp __c11_atomic_exchange(volatile _Atomic(_Tp)* __a,
+ _Tp __value, memory_order __order) {
+ _Tp __ret;
+ __atomic_exchange(&__a->__a_value, &__value, &__ret,
+ __gcc_atomic::__to_gcc_order(__order));
+ return __ret;
+}
+
+template <typename _Tp>
+static inline _Tp __c11_atomic_exchange(_Atomic(_Tp)* __a, _Tp __value,
+ memory_order __order) {
+ _Tp __ret;
+ __atomic_exchange(&__a->__a_value, &__value, &__ret,
+ __gcc_atomic::__to_gcc_order(__order));
+ return __ret;
+}
+
+template <typename _Tp>
+static inline bool __c11_atomic_compare_exchange_strong(
+ volatile _Atomic(_Tp)* __a, _Tp* __expected, _Tp __value,
+ memory_order __success, memory_order __failure) {
+ return __atomic_compare_exchange(&__a->__a_value, __expected, &__value,
+ false,
+ __gcc_atomic::__to_gcc_order(__success),
+ __gcc_atomic::__to_gcc_failure_order(__failure));
+}
+
+template <typename _Tp>
+static inline bool __c11_atomic_compare_exchange_strong(
+ _Atomic(_Tp)* __a, _Tp* __expected, _Tp __value, memory_order __success,
+ memory_order __failure) {
+ return __atomic_compare_exchange(&__a->__a_value, __expected, &__value,
+ false,
+ __gcc_atomic::__to_gcc_order(__success),
+ __gcc_atomic::__to_gcc_failure_order(__failure));
+}
+
+template <typename _Tp>
+static inline bool __c11_atomic_compare_exchange_weak(
+ volatile _Atomic(_Tp)* __a, _Tp* __expected, _Tp __value,
+ memory_order __success, memory_order __failure) {
+ return __atomic_compare_exchange(&__a->__a_value, __expected, &__value,
+ true,
+ __gcc_atomic::__to_gcc_order(__success),
+ __gcc_atomic::__to_gcc_failure_order(__failure));
+}
+
+template <typename _Tp>
+static inline bool __c11_atomic_compare_exchange_weak(
+ _Atomic(_Tp)* __a, _Tp* __expected, _Tp __value, memory_order __success,
+ memory_order __failure) {
+ return __atomic_compare_exchange(&__a->__a_value, __expected, &__value,
+ true,
+ __gcc_atomic::__to_gcc_order(__success),
+ __gcc_atomic::__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>
+static inline _Tp __c11_atomic_fetch_add(volatile _Atomic(_Tp)* __a,
+ _Td __delta, memory_order __order) {
+ return __atomic_fetch_add(&__a->__a_value, __delta * __skip_amt<_Tp>::value,
+ __gcc_atomic::__to_gcc_order(__order));
+}
+
+template <typename _Tp, typename _Td>
+static inline _Tp __c11_atomic_fetch_add(_Atomic(_Tp)* __a, _Td __delta,
+ memory_order __order) {
+ return __atomic_fetch_add(&__a->__a_value, __delta * __skip_amt<_Tp>::value,
+ __gcc_atomic::__to_gcc_order(__order));
+}
+
+template <typename _Tp, typename _Td>
+static inline _Tp __c11_atomic_fetch_sub(volatile _Atomic(_Tp)* __a,
+ _Td __delta, memory_order __order) {
+ return __atomic_fetch_sub(&__a->__a_value, __delta * __skip_amt<_Tp>::value,
+ __gcc_atomic::__to_gcc_order(__order));
+}
+
+template <typename _Tp, typename _Td>
+static inline _Tp __c11_atomic_fetch_sub(_Atomic(_Tp)* __a, _Td __delta,
+ memory_order __order) {
+ return __atomic_fetch_sub(&__a->__a_value, __delta * __skip_amt<_Tp>::value,
+ __gcc_atomic::__to_gcc_order(__order));
+}
+
+template <typename _Tp>
+static inline _Tp __c11_atomic_fetch_and(volatile _Atomic(_Tp)* __a,
+ _Tp __pattern, memory_order __order) {
+ return __atomic_fetch_and(&__a->__a_value, __pattern,
+ __gcc_atomic::__to_gcc_order(__order));
+}
+
+template <typename _Tp>
+static inline _Tp __c11_atomic_fetch_and(_Atomic(_Tp)* __a,
+ _Tp __pattern, memory_order __order) {
+ return __atomic_fetch_and(&__a->__a_value, __pattern,
+ __gcc_atomic::__to_gcc_order(__order));
+}
+
+template <typename _Tp>
+static inline _Tp __c11_atomic_fetch_or(volatile _Atomic(_Tp)* __a,
+ _Tp __pattern, memory_order __order) {
+ return __atomic_fetch_or(&__a->__a_value, __pattern,
+ __gcc_atomic::__to_gcc_order(__order));
+}
+
+template <typename _Tp>
+static inline _Tp __c11_atomic_fetch_or(_Atomic(_Tp)* __a, _Tp __pattern,
+ memory_order __order) {
+ return __atomic_fetch_or(&__a->__a_value, __pattern,
+ __gcc_atomic::__to_gcc_order(__order));
+}
+
+template <typename _Tp>
+static inline _Tp __c11_atomic_fetch_xor(volatile _Atomic(_Tp)* __a,
+ _Tp __pattern, memory_order __order) {
+ return __atomic_fetch_xor(&__a->__a_value, __pattern,
+ __gcc_atomic::__to_gcc_order(__order));
+}
+
+template <typename _Tp>
+static inline _Tp __c11_atomic_fetch_xor(_Atomic(_Tp)* __a, _Tp __pattern,
+ memory_order __order) {
+ return __atomic_fetch_xor(&__a->__a_value, __pattern,
+ __gcc_atomic::__to_gcc_order(__order));
+}
+#endif // _LIBCPP_HAS_GCC_ATOMIC_IMP
+
+template <class _Tp>
+inline _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
+# 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
+#else
+# define ATOMIC_BOOL_LOCK_FREE __GCC_ATOMIC_BOOL_LOCK_FREE
+# define ATOMIC_CHAR_LOCK_FREE __GCC_ATOMIC_CHAR_LOCK_FREE
+# 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
+
+// general atomic<T>
+
+template <class _Tp, bool = is_integral<_Tp>::value && !is_same<_Tp, bool>::value>
+struct __atomic_base // false
+{
+ mutable _Atomic(_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
+ {
+#if defined(_LIBCPP_HAS_C_ATOMIC_IMP)
+ return __c11_atomic_is_lock_free(sizeof(_Tp));
+#else
+ return __atomic_is_lock_free(sizeof(_Tp), 0);
+#endif
+ }
+ _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)
+ {__c11_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)
+ {__c11_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 __c11_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 __c11_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 __c11_atomic_exchange(&__a_, __d, __m);}
+ _LIBCPP_INLINE_VISIBILITY
+ _Tp exchange(_Tp __d, memory_order __m = memory_order_seq_cst) _NOEXCEPT
+ {return __c11_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 __c11_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 __c11_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 __c11_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 __c11_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 __c11_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 __c11_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 __c11_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 __c11_atomic_compare_exchange_strong(&__a_, &__e, __d, __m, __m);}
+
+ _LIBCPP_INLINE_VISIBILITY
+#ifndef _LIBCPP_CXX03_LANG
+ __atomic_base() _NOEXCEPT = default;
+#else
+ __atomic_base() _NOEXCEPT : __a_() {}
+#endif // _LIBCPP_CXX03_LANG
+
+ _LIBCPP_INLINE_VISIBILITY
+ _LIBCPP_CONSTEXPR __atomic_base(_Tp __d) _NOEXCEPT : __a_(__d) {}
+#ifndef _LIBCPP_CXX03_LANG
+ __atomic_base(const __atomic_base&) = delete;
+ __atomic_base& operator=(const __atomic_base&) = delete;
+ __atomic_base& operator=(const __atomic_base&) volatile = delete;
+#else
+private:
+ __atomic_base(const __atomic_base&);
+ __atomic_base& operator=(const __atomic_base&);
+ __atomic_base& operator=(const __atomic_base&) volatile;
+#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
+ __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 __c11_atomic_fetch_add(&this->__a_, __op, __m);}
+ _LIBCPP_INLINE_VISIBILITY
+ _Tp fetch_add(_Tp __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT
+ {return __c11_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 __c11_atomic_fetch_sub(&this->__a_, __op, __m);}
+ _LIBCPP_INLINE_VISIBILITY
+ _Tp fetch_sub(_Tp __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT
+ {return __c11_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 __c11_atomic_fetch_and(&this->__a_, __op, __m);}
+ _LIBCPP_INLINE_VISIBILITY
+ _Tp fetch_and(_Tp __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT
+ {return __c11_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 __c11_atomic_fetch_or(&this->__a_, __op, __m);}
+ _LIBCPP_INLINE_VISIBILITY
+ _Tp fetch_or(_Tp __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT
+ {return __c11_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 __c11_atomic_fetch_xor(&this->__a_, __op, __m);}
+ _LIBCPP_INLINE_VISIBILITY
+ _Tp fetch_xor(_Tp __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT
+ {return __c11_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;
+ _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;}
+};
+
+// atomic<T*>
+
+template <class _Tp>
+struct atomic<_Tp*>
+ : public __atomic_base<_Tp*>
+{
+ typedef __atomic_base<_Tp*> __base;
+ _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 __c11_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 __c11_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 __c11_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 __c11_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_is_lock_free
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+bool
+atomic_is_lock_free(const volatile atomic<_Tp>* __o) _NOEXCEPT
+{
+ return __o->is_lock_free();
+}
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+bool
+atomic_is_lock_free(const atomic<_Tp>* __o) _NOEXCEPT
+{
+ return __o->is_lock_free();
+}
+
+// atomic_init
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+void
+atomic_init(volatile atomic<_Tp>* __o, _Tp __d) _NOEXCEPT
+{
+ __c11_atomic_init(&__o->__a_, __d);
+}
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+void
+atomic_init(atomic<_Tp>* __o, _Tp __d) _NOEXCEPT
+{
+ __c11_atomic_init(&__o->__a_, __d);
+}
+
+// atomic_store
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+void
+atomic_store(volatile atomic<_Tp>* __o, _Tp __d) _NOEXCEPT
+{
+ __o->store(__d);
+}
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+void
+atomic_store(atomic<_Tp>* __o, _Tp __d) _NOEXCEPT
+{
+ __o->store(__d);
+}
+
+// atomic_store_explicit
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+void
+atomic_store_explicit(volatile atomic<_Tp>* __o, _Tp __d, memory_order __m) _NOEXCEPT
+ _LIBCPP_CHECK_STORE_MEMORY_ORDER(__m)
+{
+ __o->store(__d, __m);
+}
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+void
+atomic_store_explicit(atomic<_Tp>* __o, _Tp __d, memory_order __m) _NOEXCEPT
+ _LIBCPP_CHECK_STORE_MEMORY_ORDER(__m)
+{
+ __o->store(__d, __m);
+}
+
+// atomic_load
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+_Tp
+atomic_load(const volatile atomic<_Tp>* __o) _NOEXCEPT
+{
+ return __o->load();
+}
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+_Tp
+atomic_load(const atomic<_Tp>* __o) _NOEXCEPT
+{
+ return __o->load();
+}
+
+// atomic_load_explicit
+
+template <class _Tp>
+inline _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>
+inline _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>
+inline _LIBCPP_INLINE_VISIBILITY
+_Tp
+atomic_exchange(volatile atomic<_Tp>* __o, _Tp __d) _NOEXCEPT
+{
+ return __o->exchange(__d);
+}
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+_Tp
+atomic_exchange(atomic<_Tp>* __o, _Tp __d) _NOEXCEPT
+{
+ return __o->exchange(__d);
+}
+
+// atomic_exchange_explicit
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+_Tp
+atomic_exchange_explicit(volatile atomic<_Tp>* __o, _Tp __d, memory_order __m) _NOEXCEPT
+{
+ return __o->exchange(__d, __m);
+}
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+_Tp
+atomic_exchange_explicit(atomic<_Tp>* __o, _Tp __d, memory_order __m) _NOEXCEPT
+{
+ return __o->exchange(__d, __m);
+}
+
+// atomic_compare_exchange_weak
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+bool
+atomic_compare_exchange_weak(volatile atomic<_Tp>* __o, _Tp* __e, _Tp __d) _NOEXCEPT
+{
+ return __o->compare_exchange_weak(*__e, __d);
+}
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+bool
+atomic_compare_exchange_weak(atomic<_Tp>* __o, _Tp* __e, _Tp __d) _NOEXCEPT
+{
+ return __o->compare_exchange_weak(*__e, __d);
+}
+
+// atomic_compare_exchange_strong
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+bool
+atomic_compare_exchange_strong(volatile atomic<_Tp>* __o, _Tp* __e, _Tp __d) _NOEXCEPT
+{
+ return __o->compare_exchange_strong(*__e, __d);
+}
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+bool
+atomic_compare_exchange_strong(atomic<_Tp>* __o, _Tp* __e, _Tp __d) _NOEXCEPT
+{
+ return __o->compare_exchange_strong(*__e, __d);
+}
+
+// atomic_compare_exchange_weak_explicit
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+bool
+atomic_compare_exchange_weak_explicit(volatile atomic<_Tp>* __o, _Tp* __e,
+ _Tp __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>
+inline _LIBCPP_INLINE_VISIBILITY
+bool
+atomic_compare_exchange_weak_explicit(atomic<_Tp>* __o, _Tp* __e, _Tp __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>
+inline _LIBCPP_INLINE_VISIBILITY
+bool
+atomic_compare_exchange_strong_explicit(volatile atomic<_Tp>* __o,
+ _Tp* __e, _Tp __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>
+inline _LIBCPP_INLINE_VISIBILITY
+bool
+atomic_compare_exchange_strong_explicit(atomic<_Tp>* __o, _Tp* __e,
+ _Tp __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_fetch_add
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+typename enable_if
+<
+ is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
+ _Tp
+>::type
+atomic_fetch_add(volatile atomic<_Tp>* __o, _Tp __op) _NOEXCEPT
+{
+ return __o->fetch_add(__op);
+}
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+typename enable_if
+<
+ is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
+ _Tp
+>::type
+atomic_fetch_add(atomic<_Tp>* __o, _Tp __op) _NOEXCEPT
+{
+ return __o->fetch_add(__op);
+}
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+_Tp*
+atomic_fetch_add(volatile atomic<_Tp*>* __o, ptrdiff_t __op) _NOEXCEPT
+{
+ return __o->fetch_add(__op);
+}
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+_Tp*
+atomic_fetch_add(atomic<_Tp*>* __o, ptrdiff_t __op) _NOEXCEPT
+{
+ return __o->fetch_add(__op);
+}
+
+// atomic_fetch_add_explicit
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+typename enable_if
+<
+ is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
+ _Tp
+>::type
+atomic_fetch_add_explicit(volatile atomic<_Tp>* __o, _Tp __op, memory_order __m) _NOEXCEPT
+{
+ return __o->fetch_add(__op, __m);
+}
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+typename enable_if
+<
+ is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
+ _Tp
+>::type
+atomic_fetch_add_explicit(atomic<_Tp>* __o, _Tp __op, memory_order __m) _NOEXCEPT
+{
+ return __o->fetch_add(__op, __m);
+}
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+_Tp*
+atomic_fetch_add_explicit(volatile atomic<_Tp*>* __o, ptrdiff_t __op,
+ memory_order __m) _NOEXCEPT
+{
+ return __o->fetch_add(__op, __m);
+}
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+_Tp*
+atomic_fetch_add_explicit(atomic<_Tp*>* __o, ptrdiff_t __op, memory_order __m) _NOEXCEPT
+{
+ return __o->fetch_add(__op, __m);
+}
+
+// atomic_fetch_sub
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+typename enable_if
+<
+ is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
+ _Tp
+>::type
+atomic_fetch_sub(volatile atomic<_Tp>* __o, _Tp __op) _NOEXCEPT
+{
+ return __o->fetch_sub(__op);
+}
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+typename enable_if
+<
+ is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
+ _Tp
+>::type
+atomic_fetch_sub(atomic<_Tp>* __o, _Tp __op) _NOEXCEPT
+{
+ return __o->fetch_sub(__op);
+}
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+_Tp*
+atomic_fetch_sub(volatile atomic<_Tp*>* __o, ptrdiff_t __op) _NOEXCEPT
+{
+ return __o->fetch_sub(__op);
+}
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+_Tp*
+atomic_fetch_sub(atomic<_Tp*>* __o, ptrdiff_t __op) _NOEXCEPT
+{
+ return __o->fetch_sub(__op);
+}
+
+// atomic_fetch_sub_explicit
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+typename enable_if
+<
+ is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
+ _Tp
+>::type
+atomic_fetch_sub_explicit(volatile atomic<_Tp>* __o, _Tp __op, memory_order __m) _NOEXCEPT
+{
+ return __o->fetch_sub(__op, __m);
+}
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+typename enable_if
+<
+ is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
+ _Tp
+>::type
+atomic_fetch_sub_explicit(atomic<_Tp>* __o, _Tp __op, memory_order __m) _NOEXCEPT
+{
+ return __o->fetch_sub(__op, __m);
+}
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+_Tp*
+atomic_fetch_sub_explicit(volatile atomic<_Tp*>* __o, ptrdiff_t __op,
+ memory_order __m) _NOEXCEPT
+{
+ return __o->fetch_sub(__op, __m);
+}
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+_Tp*
+atomic_fetch_sub_explicit(atomic<_Tp*>* __o, ptrdiff_t __op, memory_order __m) _NOEXCEPT
+{
+ return __o->fetch_sub(__op, __m);
+}
+
+// atomic_fetch_and
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+typename enable_if
+<
+ is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
+ _Tp
+>::type
+atomic_fetch_and(volatile atomic<_Tp>* __o, _Tp __op) _NOEXCEPT
+{
+ return __o->fetch_and(__op);
+}
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+typename enable_if
+<
+ is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
+ _Tp
+>::type
+atomic_fetch_and(atomic<_Tp>* __o, _Tp __op) _NOEXCEPT
+{
+ return __o->fetch_and(__op);
+}
+
+// atomic_fetch_and_explicit
+
+template <class _Tp>
+inline _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, _Tp __op, memory_order __m) _NOEXCEPT
+{
+ return __o->fetch_and(__op, __m);
+}
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+typename enable_if
+<
+ is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
+ _Tp
+>::type
+atomic_fetch_and_explicit(atomic<_Tp>* __o, _Tp __op, memory_order __m) _NOEXCEPT
+{
+ return __o->fetch_and(__op, __m);
+}
+
+// atomic_fetch_or
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+typename enable_if
+<
+ is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
+ _Tp
+>::type
+atomic_fetch_or(volatile atomic<_Tp>* __o, _Tp __op) _NOEXCEPT
+{
+ return __o->fetch_or(__op);
+}
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+typename enable_if
+<
+ is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
+ _Tp
+>::type
+atomic_fetch_or(atomic<_Tp>* __o, _Tp __op) _NOEXCEPT
+{
+ return __o->fetch_or(__op);
+}
+
+// atomic_fetch_or_explicit
+
+template <class _Tp>
+inline _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, _Tp __op, memory_order __m) _NOEXCEPT
+{
+ return __o->fetch_or(__op, __m);
+}
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+typename enable_if
+<
+ is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
+ _Tp
+>::type
+atomic_fetch_or_explicit(atomic<_Tp>* __o, _Tp __op, memory_order __m) _NOEXCEPT
+{
+ return __o->fetch_or(__op, __m);
+}
+
+// atomic_fetch_xor
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+typename enable_if
+<
+ is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
+ _Tp
+>::type
+atomic_fetch_xor(volatile atomic<_Tp>* __o, _Tp __op) _NOEXCEPT
+{
+ return __o->fetch_xor(__op);
+}
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+typename enable_if
+<
+ is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
+ _Tp
+>::type
+atomic_fetch_xor(atomic<_Tp>* __o, _Tp __op) _NOEXCEPT
+{
+ return __o->fetch_xor(__op);
+}
+
+// atomic_fetch_xor_explicit
+
+template <class _Tp>
+inline _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, _Tp __op, memory_order __m) _NOEXCEPT
+{
+ return __o->fetch_xor(__op, __m);
+}
+
+template <class _Tp>
+inline _LIBCPP_INLINE_VISIBILITY
+typename enable_if
+<
+ is_integral<_Tp>::value && !is_same<_Tp, bool>::value,
+ _Tp
+>::type
+atomic_fetch_xor_explicit(atomic<_Tp>* __o, _Tp __op, memory_order __m) _NOEXCEPT
+{
+ return __o->fetch_xor(__op, __m);
+}
+
+// flag type and operations
+
+typedef struct atomic_flag
+{
+ _Atomic(bool) __a_;
+
+ _LIBCPP_INLINE_VISIBILITY
+ bool test_and_set(memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT
+ {return __c11_atomic_exchange(&__a_, true, __m);}
+ _LIBCPP_INLINE_VISIBILITY
+ bool test_and_set(memory_order __m = memory_order_seq_cst) _NOEXCEPT
+ {return __c11_atomic_exchange(&__a_, true, __m);}
+ _LIBCPP_INLINE_VISIBILITY
+ void clear(memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT
+ {__c11_atomic_store(&__a_, false, __m);}
+ _LIBCPP_INLINE_VISIBILITY
+ void clear(memory_order __m = memory_order_seq_cst) _NOEXCEPT
+ {__c11_atomic_store(&__a_, false, __m);}
+
+ _LIBCPP_INLINE_VISIBILITY
+#ifndef _LIBCPP_CXX03_LANG
+ atomic_flag() _NOEXCEPT = default;
+#else
+ atomic_flag() _NOEXCEPT : __a_() {}
+#endif // _LIBCPP_CXX03_LANG
+
+ _LIBCPP_INLINE_VISIBILITY
+ 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:
+ atomic_flag(const atomic_flag&);
+ atomic_flag& operator=(const atomic_flag&);
+ atomic_flag& operator=(const atomic_flag&) volatile;
+#endif
+} atomic_flag;
+
+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);
+}
+
+// fences
+
+inline _LIBCPP_INLINE_VISIBILITY
+void
+atomic_thread_fence(memory_order __m) _NOEXCEPT
+{
+ __c11_atomic_thread_fence(__m);
+}
+
+inline _LIBCPP_INLINE_VISIBILITY
+void
+atomic_signal_fence(memory_order __m) _NOEXCEPT
+{
+ __c11_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;
+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;
+
+#define ATOMIC_FLAG_INIT {false}
+#define ATOMIC_VAR_INIT(__v) {__v}
+
+_LIBCPP_END_NAMESPACE_STD
+
+#endif // _LIBCPP_ATOMIC