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// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP_ATOMIC
#define _LIBCPP_ATOMIC
/*
atomic synopsis
namespace std
{
// feature test macro [version.syn]
#define __cpp_lib_atomic_is_always_lock_free
#define __cpp_lib_atomic_flag_test
#define __cpp_lib_atomic_lock_free_type_aliases
#define __cpp_lib_atomic_wait
// order and consistency
enum memory_order: unspecified // enum class in C++20
{
relaxed,
consume, // load-consume
acquire, // load-acquire
release, // store-release
acq_rel, // store-release load-acquire
seq_cst // store-release load-acquire
};
inline constexpr auto memory_order_relaxed = memory_order::relaxed;
inline constexpr auto memory_order_consume = memory_order::consume;
inline constexpr auto memory_order_acquire = memory_order::acquire;
inline constexpr auto memory_order_release = memory_order::release;
inline constexpr auto memory_order_acq_rel = memory_order::acq_rel;
inline constexpr auto memory_order_seq_cst = memory_order::seq_cst;
template <class T> T kill_dependency(T y) noexcept;
// lock-free property
#define ATOMIC_BOOL_LOCK_FREE unspecified
#define ATOMIC_CHAR_LOCK_FREE unspecified
#define ATOMIC_CHAR8_T_LOCK_FREE unspecified // C++20
#define ATOMIC_CHAR16_T_LOCK_FREE unspecified
#define ATOMIC_CHAR32_T_LOCK_FREE unspecified
#define ATOMIC_WCHAR_T_LOCK_FREE unspecified
#define ATOMIC_SHORT_LOCK_FREE unspecified
#define ATOMIC_INT_LOCK_FREE unspecified
#define ATOMIC_LONG_LOCK_FREE unspecified
#define ATOMIC_LLONG_LOCK_FREE unspecified
#define ATOMIC_POINTER_LOCK_FREE unspecified
template <class T>
struct atomic
{
using value_type = T;
static constexpr bool is_always_lock_free;
bool is_lock_free() const volatile noexcept;
bool is_lock_free() const noexcept;
atomic() noexcept = default; // until C++20
constexpr atomic() noexcept(is_nothrow_default_constructible_v<T>); // since C++20
constexpr atomic(T desr) noexcept;
atomic(const atomic&) = delete;
atomic& operator=(const atomic&) = delete;
atomic& operator=(const atomic&) volatile = delete;
T load(memory_order m = memory_order_seq_cst) const volatile noexcept;
T load(memory_order m = memory_order_seq_cst) const noexcept;
operator T() const volatile noexcept;
operator T() const noexcept;
void store(T desr, memory_order m = memory_order_seq_cst) volatile noexcept;
void store(T desr, memory_order m = memory_order_seq_cst) noexcept;
T operator=(T) volatile noexcept;
T operator=(T) noexcept;
T exchange(T desr, memory_order m = memory_order_seq_cst) volatile noexcept;
T exchange(T desr, memory_order m = memory_order_seq_cst) noexcept;
bool compare_exchange_weak(T& expc, T desr,
memory_order s, memory_order f) volatile noexcept;
bool compare_exchange_weak(T& expc, T desr, memory_order s, memory_order f) noexcept;
bool compare_exchange_strong(T& expc, T desr,
memory_order s, memory_order f) volatile noexcept;
bool compare_exchange_strong(T& expc, T desr,
memory_order s, memory_order f) noexcept;
bool compare_exchange_weak(T& expc, T desr,
memory_order m = memory_order_seq_cst) volatile noexcept;
bool compare_exchange_weak(T& expc, T desr,
memory_order m = memory_order_seq_cst) noexcept;
bool compare_exchange_strong(T& expc, T desr,
memory_order m = memory_order_seq_cst) volatile noexcept;
bool compare_exchange_strong(T& expc, T desr,
memory_order m = memory_order_seq_cst) noexcept;
void wait(T, memory_order = memory_order::seq_cst) const volatile noexcept;
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;
};
// [atomics.nonmembers], non-member functions
template<class T>
bool atomic_is_lock_free(const volatile atomic<T>*) noexcept;
template<class T>
bool atomic_is_lock_free(const atomic<T>*) noexcept;
template<class T>
void atomic_store(volatile atomic<T>*, atomic<T>::value_type) noexcept;
template<class T>
void atomic_store(atomic<T>*, atomic<T>::value_type) noexcept;
template<class T>
void atomic_store_explicit(volatile atomic<T>*, atomic<T>::value_type,
memory_order) noexcept;
template<class T>
void atomic_store_explicit(atomic<T>*, atomic<T>::value_type,
memory_order) noexcept;
template<class T>
T atomic_load(const volatile atomic<T>*) noexcept;
template<class T>
T atomic_load(const atomic<T>*) noexcept;
template<class T>
T atomic_load_explicit(const volatile atomic<T>*, memory_order) noexcept;
template<class T>
T atomic_load_explicit(const atomic<T>*, memory_order) noexcept;
template<class T>
T atomic_exchange(volatile atomic<T>*, atomic<T>::value_type) noexcept;
template<class T>
T atomic_exchange(atomic<T>*, atomic<T>::value_type) noexcept;
template<class T>
T atomic_exchange_explicit(volatile atomic<T>*, atomic<T>::value_type,
memory_order) noexcept;
template<class T>
T atomic_exchange_explicit(atomic<T>*, atomic<T>::value_type,
memory_order) noexcept;
template<class T>
bool atomic_compare_exchange_weak(volatile atomic<T>*, atomic<T>::value_type*,
atomic<T>::value_type) noexcept;
template<class T>
bool atomic_compare_exchange_weak(atomic<T>*, atomic<T>::value_type*,
atomic<T>::value_type) noexcept;
template<class T>
bool atomic_compare_exchange_strong(volatile atomic<T>*, atomic<T>::value_type*,
atomic<T>::value_type) noexcept;
template<class T>
bool atomic_compare_exchange_strong(atomic<T>*, atomic<T>::value_type*,
atomic<T>::value_type) noexcept;
template<class T>
bool atomic_compare_exchange_weak_explicit(volatile atomic<T>*, atomic<T>::value_type*,
atomic<T>::value_type,
memory_order, memory_order) noexcept;
template<class T>
bool atomic_compare_exchange_weak_explicit(atomic<T>*, atomic<T>::value_type*,
atomic<T>::value_type,
memory_order, memory_order) noexcept;
template<class T>
bool atomic_compare_exchange_strong_explicit(volatile atomic<T>*, atomic<T>::value_type*,
atomic<T>::value_type,
memory_order, memory_order) noexcept;
template<class T>
bool atomic_compare_exchange_strong_explicit(atomic<T>*, atomic<T>::value_type*,
atomic<T>::value_type,
memory_order, memory_order) noexcept;
template<class T>
T atomic_fetch_add(volatile atomic<T>*, atomic<T>::difference_type) noexcept;
template<class T>
T atomic_fetch_add(atomic<T>*, atomic<T>::difference_type) noexcept;
template<class T>
T atomic_fetch_add_explicit(volatile atomic<T>*, atomic<T>::difference_type,
memory_order) noexcept;
template<class T>
T atomic_fetch_add_explicit(atomic<T>*, atomic<T>::difference_type,
memory_order) noexcept;
template<class T>
T atomic_fetch_sub(volatile atomic<T>*, atomic<T>::difference_type) noexcept;
template<class T>
T atomic_fetch_sub(atomic<T>*, atomic<T>::difference_type) noexcept;
template<class T>
T atomic_fetch_sub_explicit(volatile atomic<T>*, atomic<T>::difference_type,
memory_order) noexcept;
template<class T>
T atomic_fetch_sub_explicit(atomic<T>*, atomic<T>::difference_type,
memory_order) noexcept;
template<class T>
T atomic_fetch_and(volatile atomic<T>*, atomic<T>::value_type) noexcept;
template<class T>
T atomic_fetch_and(atomic<T>*, atomic<T>::value_type) noexcept;
template<class T>
T atomic_fetch_and_explicit(volatile atomic<T>*, atomic<T>::value_type,
memory_order) noexcept;
template<class T>
T atomic_fetch_and_explicit(atomic<T>*, atomic<T>::value_type,
memory_order) noexcept;
template<class T>
T atomic_fetch_or(volatile atomic<T>*, atomic<T>::value_type) noexcept;
template<class T>
T atomic_fetch_or(atomic<T>*, atomic<T>::value_type) noexcept;
template<class T>
T atomic_fetch_or_explicit(volatile atomic<T>*, atomic<T>::value_type,
memory_order) noexcept;
template<class T>
T atomic_fetch_or_explicit(atomic<T>*, atomic<T>::value_type,
memory_order) noexcept;
template<class T>
T atomic_fetch_xor(volatile atomic<T>*, atomic<T>::value_type) noexcept;
template<class T>
T atomic_fetch_xor(atomic<T>*, atomic<T>::value_type) noexcept;
template<class T>
T atomic_fetch_xor_explicit(volatile atomic<T>*, atomic<T>::value_type,
memory_order) noexcept;
template<class T>
T atomic_fetch_xor_explicit(atomic<T>*, atomic<T>::value_type,
memory_order) noexcept;
template<class T>
void atomic_wait(const volatile atomic<T>*, atomic<T>::value_type);
template<class T>
void atomic_wait(const atomic<T>*, atomic<T>::value_type);
template<class T>
void atomic_wait_explicit(const volatile atomic<T>*, atomic<T>::value_type,
memory_order);
template<class T>
void atomic_wait_explicit(const atomic<T>*, atomic<T>::value_type,
memory_order);
template<class T>
void atomic_notify_one(volatile atomic<T>*);
template<class T>
void atomic_notify_one(atomic<T>*);
template<class T>
void atomic_notify_all(volatile atomic<T>*);
template<class T>
void atomic_notify_all(atomic<T>*);
// 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, atomic<T>::value_type desr) noexcept;
template <class T>
void atomic_init(atomic<T>* obj, atomic<T>::value_type desr) noexcept;
#define ATOMIC_VAR_INIT(value) see below
#define ATOMIC_FLAG_INIT see below
} // std
*/
#include <__assert> // all public C++ headers provide the assertion handler
#include <__availability>
#include <__chrono/duration.h>
#include <__config>
#include <__thread/poll_with_backoff.h>
#include <__thread/timed_backoff_policy.h>
#include <cstddef>
#include <cstdint>
#include <cstring>
#include <type_traits>
#include <version>
#ifndef _LIBCPP_HAS_NO_THREADS
# include <__threading_support>
#endif
#ifndef _LIBCPP_REMOVE_TRANSITIVE_INCLUDES
# include <chrono>
#endif
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
#ifdef _LIBCPP_HAS_NO_ATOMIC_HEADER
# error <atomic> is not implemented
#endif
#ifdef kill_dependency
# error <atomic> is incompatible with <stdatomic.h> before C++23. Please compile with -std=c++23.
#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 }; };
#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
template<> struct __cxx_is_always_lock_free<wchar_t> { enum { __value = 2 == ATOMIC_WCHAR_T_LOCK_FREE }; };
#endif
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 {
static_assert(is_trivially_copyable<_Tp>::value,
"std::atomic<T> requires that 'T' be a trivially copyable type");
_LIBCPP_INLINE_VISIBILITY __cxx_atomic_impl() _NOEXCEPT = default;
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR explicit __cxx_atomic_impl(_Tp __value) _NOEXCEPT
: _Base(__value) {}
};
#if defined(__linux__) || (defined(_AIX) && !defined(__64BIT__))
using __cxx_contention_t = int32_t;
#else
using __cxx_contention_t = int64_t;
#endif // __linux__ || (_AIX && !__64BIT__)
using __cxx_atomic_contention_t = __cxx_atomic_impl<__cxx_contention_t>;
#if defined(_LIBCPP_HAS_NO_THREADS)
# define _LIBCPP_HAS_NO_PLATFORM_WAIT
#endif
// TODO:
// _LIBCPP_HAS_NO_PLATFORM_WAIT is currently a "dead" macro, in the sense that
// it is not tied anywhere into the build system or even documented. We should
// clean it up because it is technically never defined except when threads are
// disabled. We should clean it up in its own changeset in case we break "bad"
// users.
#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)
{
#if defined(_LIBCPP_HAS_NO_THREADS)
using _Policy = __spinning_backoff_policy;
#else
using _Policy = __libcpp_timed_backoff_policy;
#endif
return __libcpp_thread_poll_with_backoff(__test_fn, _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 = default;
#endif
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
__atomic_base(_Tp __d) _NOEXCEPT : __a_(__d) {}
__atomic_base(const __atomic_base&) = delete;
};
#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 = 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 = 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 = 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 {
// __atomic_fetch_add accepts function pointers, guard against them.
static_assert(!is_function<typename remove_pointer<_Tp>::type>::value, "Pointer to function isn't allowed");
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 {
// __atomic_fetch_add accepts function pointers, guard against them.
static_assert(!is_function<typename remove_pointer<_Tp>::type>::value, "Pointer to function isn't allowed");
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 {
// __atomic_fetch_add accepts function pointers, guard against them.
static_assert(!is_function<typename remove_pointer<_Tp>::type>::value, "Pointer to function isn't allowed");
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 {
// __atomic_fetch_add accepts function pointers, guard against them.
static_assert(!is_function<typename remove_pointer<_Tp>::type>::value, "Pointer to function isn't allowed");
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
_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
_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
_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
_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 = default;
#endif
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
atomic_flag(bool __b) _NOEXCEPT : __a_(__b) {} // EXTENSION
atomic_flag(const atomic_flag&) = delete;
atomic_flag& operator=(const atomic_flag&) = delete;
atomic_flag& operator=(const atomic_flag&) volatile = delete;
} 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;
#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
typedef atomic<wchar_t> atomic_wchar_t;
#endif
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
#define _LIBCPP_NO_LOCK_FREE_TYPES
#endif
#if !defined(_LIBCPP_NO_LOCK_FREE_TYPES)
typedef atomic<__libcpp_signed_lock_free> atomic_signed_lock_free;
typedef atomic<__libcpp_unsigned_lock_free> atomic_unsigned_lock_free;
#endif
#define ATOMIC_FLAG_INIT {false}
#define ATOMIC_VAR_INIT(__v) {__v}
#if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS)
# if defined(_LIBCPP_CLANG_VER) && _LIBCPP_CLANG_VER >= 1400
# pragma clang deprecated(ATOMIC_VAR_INIT)
# endif
#endif // _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS)
_LIBCPP_END_NAMESPACE_STD
#endif // _LIBCPP_ATOMIC
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