Template:cpp/synopsis/atomic
From cppreference.com
namespace std { /* until C++20: enum memory_order { memory_order_relaxed, memory_order_consume, memory_order_acquire, memory_order_release, memory_order_acq_rel, memory_order_seq_cst }; */ enum class memory_order : /* unspecified */; inline constexpr memory_order memory_order_relaxed = memory_order::relaxed; inline constexpr memory_order memory_order_consume = memory_order::consume; inline constexpr memory_order memory_order_acquire = memory_order::acquire; inline constexpr memory_order memory_order_release = memory_order::release; inline constexpr memory_order memory_order_acq_rel = memory_order::acq_rel; inline constexpr memory_order 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 */ #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 */ // class template atomic_ref template<class T> struct atomic_ref; // partial specialization for pointers template<class T> struct atomic_ref<T*>; // class template atomic template<class T> struct atomic; // partial specialization for pointers template<class T> struct atomic<T*>; // 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>*, typename atomic<T>::value_type) noexcept; template<class T> void atomic_store(atomic<T>*, typename atomic<T>::value_type) noexcept; template<class T> void atomic_store_explicit(volatile atomic<T>*, typename atomic<T>::value_type, memory_order) noexcept; template<class T> void atomic_store_explicit(atomic<T>*, typename 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>*, typename atomic<T>::value_type) noexcept; template<class T> T atomic_exchange(atomic<T>*, typename atomic<T>::value_type) noexcept; template<class T> T atomic_exchange_explicit(volatile atomic<T>*, typename atomic<T>::value_type, memory_order) noexcept; template<class T> T atomic_exchange_explicit(atomic<T>*, typename atomic<T>::value_type, memory_order) noexcept; template<class T> bool atomic_compare_exchange_weak(volatile atomic<T>*, typename atomic<T>::value_type*, typename atomic<T>::value_type) noexcept; template<class T> bool atomic_compare_exchange_weak(atomic<T>*, typename atomic<T>::value_type*, typename atomic<T>::value_type) noexcept; template<class T> bool atomic_compare_exchange_strong(volatile atomic<T>*, typename atomic<T>::value_type*, typename atomic<T>::value_type) noexcept; template<class T> bool atomic_compare_exchange_strong(atomic<T>*, typename atomic<T>::value_type*, typename atomic<T>::value_type) noexcept; template<class T> bool atomic_compare_exchange_weak_explicit(volatile atomic<T>*, typename atomic<T>::value_type*, typename atomic<T>::value_type, memory_order, memory_order) noexcept; template<class T> bool atomic_compare_exchange_weak_explicit(atomic<T>*, typename atomic<T>::value_type*, typename atomic<T>::value_type, memory_order, memory_order) noexcept; template<class T> bool atomic_compare_exchange_strong_explicit(volatile atomic<T>*, typename atomic<T>::value_type*, typename atomic<T>::value_type, memory_order, memory_order) noexcept; template<class T> bool atomic_compare_exchange_strong_explicit(atomic<T>*, typename atomic<T>::value_type*, typename atomic<T>::value_type, memory_order, memory_order) noexcept; template<class T> T atomic_fetch_add(volatile atomic<T>*, typename atomic<T>::difference_type) noexcept; template<class T> T atomic_fetch_add(atomic<T>*, typename atomic<T>::difference_type) noexcept; template<class T> T atomic_fetch_add_explicit(volatile atomic<T>*, typename atomic<T>::difference_type, memory_order) noexcept; template<class T> T atomic_fetch_add_explicit(atomic<T>*, typename atomic<T>::difference_type, memory_order) noexcept; template<class T> T atomic_fetch_sub(volatile atomic<T>*, typename atomic<T>::difference_type) noexcept; template<class T> T atomic_fetch_sub(atomic<T>*, typename atomic<T>::difference_type) noexcept; template<class T> T atomic_fetch_sub_explicit(volatile atomic<T>*, typename atomic<T>::difference_type, memory_order) noexcept; template<class T> T atomic_fetch_sub_explicit(atomic<T>*, typename atomic<T>::difference_type, memory_order) noexcept; template<class T> T atomic_fetch_and(volatile atomic<T>*, typename atomic<T>::value_type) noexcept; template<class T> T atomic_fetch_and(atomic<T>*, typename atomic<T>::value_type) noexcept; template<class T> T atomic_fetch_and_explicit(volatile atomic<T>*, typename atomic<T>::value_type, memory_order) noexcept; template<class T> T atomic_fetch_and_explicit(atomic<T>*, typename atomic<T>::value_type, memory_order) noexcept; template<class T> T atomic_fetch_or(volatile atomic<T>*, typename atomic<T>::value_type) noexcept; template<class T> T atomic_fetch_or(atomic<T>*, typename atomic<T>::value_type) noexcept; template<class T> T atomic_fetch_or_explicit(volatile atomic<T>*, typename atomic<T>::value_type, memory_order) noexcept; template<class T> T atomic_fetch_or_explicit(atomic<T>*, typename atomic<T>::value_type, memory_order) noexcept; template<class T> T atomic_fetch_xor(volatile atomic<T>*, typename atomic<T>::value_type) noexcept; template<class T> T atomic_fetch_xor(atomic<T>*, typename atomic<T>::value_type) noexcept; template<class T> T atomic_fetch_xor_explicit(volatile atomic<T>*, typename atomic<T>::value_type, memory_order) noexcept; template<class T> T atomic_fetch_xor_explicit(atomic<T>*, typename atomic<T>::value_type, memory_order) noexcept; template<class T> T atomic_fetch_max(volatile atomic<T>*, typename atomic<T>::value_type) noexcept; template<class T> T atomic_fetch_max(atomic<T>*, typename atomic<T>::value_type) noexcept; template<class T> T atomic_fetch_max_explicit(volatile atomic<T>*, typename atomic<T>::value_type, memory_order) noexcept; template<class T> T atomic_fetch_max_explicit(atomic<T>*, typename atomic<T>::value_type, memory_order) noexcept; template<class T> T atomic_fetch_min(volatile atomic<T>*, typename atomic<T>::value_type) noexcept; template<class T> T atomic_fetch_min(atomic<T>*, typename atomic<T>::value_type) noexcept; template<class T> T atomic_fetch_min_explicit(volatile atomic<T>*, typename atomic<T>::value_type, memory_order) noexcept; template<class T> T atomic_fetch_min_explicit(atomic<T>*, typename atomic<T>::value_type, memory_order) noexcept; template<class T> void atomic_wait(const volatile atomic<T>*, typename atomic<T>::value_type); template<class T> void atomic_wait(const atomic<T>*, typename atomic<T>::value_type); template<class T> void atomic_wait_explicit(const volatile atomic<T>*, typename atomic<T>::value_type, memory_order); template<class T> void atomic_wait_explicit(const atomic<T>*, typename 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>*); // type aliases using atomic_bool = atomic<bool>; using atomic_char = atomic<char>; using atomic_schar = atomic<signed char>; using atomic_uchar = atomic<unsigned char>; using atomic_short = atomic<short>; using atomic_ushort = atomic<unsigned short>; using atomic_int = atomic<int>; using atomic_uint = atomic<unsigned int>; using atomic_long = atomic<long>; using atomic_ulong = atomic<unsigned long>; using atomic_llong = atomic<long long>; using atomic_ullong = atomic<unsigned long long>; using atomic_char8_t = atomic<char8_t>; using atomic_char16_t = atomic<char16_t>; using atomic_char32_t = atomic<char32_t>; using atomic_wchar_t = atomic<wchar_t>; using atomic_int8_t = atomic<int8_t>; using atomic_uint8_t = atomic<uint8_t>; using atomic_int16_t = atomic<int16_t>; using atomic_uint16_t = atomic<uint16_t>; using atomic_int32_t = atomic<int32_t>; using atomic_uint32_t = atomic<uint32_t>; using atomic_int64_t = atomic<int64_t>; using atomic_uint64_t = atomic<uint64_t>; using atomic_int_least8_t = atomic<int_least8_t>; using atomic_uint_least8_t = atomic<uint_least8_t>; using atomic_int_least16_t = atomic<int_least16_t>; using atomic_uint_least16_t = atomic<uint_least16_t>; using atomic_int_least32_t = atomic<int_least32_t>; using atomic_uint_least32_t = atomic<uint_least32_t>; using atomic_int_least64_t = atomic<int_least64_t>; using atomic_uint_least64_t = atomic<uint_least64_t>; using atomic_int_fast8_t = atomic<int_fast8_t>; using atomic_uint_fast8_t = atomic<uint_fast8_t>; using atomic_int_fast16_t = atomic<int_fast16_t>; using atomic_uint_fast16_t = atomic<uint_fast16_t>; using atomic_int_fast32_t = atomic<int_fast32_t>; using atomic_uint_fast32_t = atomic<uint_fast32_t>; using atomic_int_fast64_t = atomic<int_fast64_t>; using atomic_uint_fast64_t = atomic<uint_fast64_t>; using atomic_intptr_t = atomic<intptr_t>; using atomic_uintptr_t = atomic<uintptr_t>; using atomic_size_t = atomic<size_t>; using atomic_ptrdiff_t = atomic<ptrdiff_t>; using atomic_intmax_t = atomic<intmax_t>; using atomic_uintmax_t = atomic<uintmax_t>; using atomic_signed_lock_free = /* see description */; using atomic_unsigned_lock_free = /* see description */; // flag type and operations struct atomic_flag; bool atomic_flag_test(const volatile atomic_flag*) noexcept; bool atomic_flag_test(const atomic_flag*) noexcept; bool atomic_flag_test_explicit(const volatile atomic_flag*, memory_order) noexcept; bool atomic_flag_test_explicit(const atomic_flag*, memory_order) noexcept; bool atomic_flag_test_and_set(volatile atomic_flag*) noexcept; bool atomic_flag_test_and_set(atomic_flag*) noexcept; bool atomic_flag_test_and_set_explicit(volatile atomic_flag*, memory_order) noexcept; bool atomic_flag_test_and_set_explicit(atomic_flag*, memory_order) noexcept; void atomic_flag_clear(volatile atomic_flag*) noexcept; void atomic_flag_clear(atomic_flag*) noexcept; void atomic_flag_clear_explicit(volatile atomic_flag*, memory_order) noexcept; void atomic_flag_clear_explicit(atomic_flag*, memory_order) noexcept; void atomic_flag_wait(const volatile atomic_flag*, bool) noexcept; void atomic_flag_wait(const atomic_flag*, bool) noexcept; void atomic_flag_wait_explicit(const volatile atomic_flag*, bool, memory_order) noexcept; void atomic_flag_wait_explicit(const atomic_flag*, bool, memory_order) noexcept; void atomic_flag_notify_one(volatile atomic_flag*) noexcept; void atomic_flag_notify_one(atomic_flag*) noexcept; void atomic_flag_notify_all(volatile atomic_flag*) noexcept; void atomic_flag_notify_all(atomic_flag*) noexcept; // fences extern "C" void atomic_thread_fence(memory_order) noexcept; extern "C" void atomic_signal_fence(memory_order) noexcept; } // deprecated namespace std { template<class T> void atomic_init(volatile atomic<T>*, typename atomic<T>::value_type) noexcept; template<class T> void atomic_init(atomic<T>*, typename atomic<T>::value_type) noexcept; #define ATOMIC_VAR_INIT(value) /* see description */ #define ATOMIC_FLAG_INIT /* see description */ }
[edit] Class template std::atomic
namespace std { template<class T> struct atomic { using value_type = T; static constexpr bool is_always_lock_free = /* implementation-defined */; bool is_lock_free() const volatile noexcept; bool is_lock_free() const noexcept; // operations on atomic types constexpr atomic() noexcept(is_nothrow_default_constructible_v<T>); constexpr atomic(T) noexcept; atomic(const atomic&) = delete; atomic& operator=(const atomic&) = delete; atomic& operator=(const atomic&) volatile = delete; T load(memory_order = memory_order::seq_cst) const volatile noexcept; T load(memory_order = memory_order::seq_cst) const noexcept; operator T() const volatile noexcept; operator T() const noexcept; void store(T, memory_order = memory_order::seq_cst) volatile noexcept; void store(T, memory_order = memory_order::seq_cst) noexcept; T operator=(T) volatile noexcept; T operator=(T) noexcept; T exchange(T, memory_order = memory_order::seq_cst) volatile noexcept; T exchange(T, memory_order = memory_order::seq_cst) noexcept; bool compare_exchange_weak(T&, T, memory_order, memory_order) volatile noexcept; bool compare_exchange_weak(T&, T, memory_order, memory_order) noexcept; bool compare_exchange_strong(T&, T, memory_order, memory_order) volatile noexcept; bool compare_exchange_strong(T&, T, memory_order, memory_order) noexcept; bool compare_exchange_weak(T&, T, memory_order = memory_order::seq_cst) volatile noexcept; bool compare_exchange_weak(T&, T, memory_order = memory_order::seq_cst) noexcept; bool compare_exchange_strong(T&, T, memory_order = memory_order::seq_cst) volatile noexcept; bool compare_exchange_strong(T&, T, memory_order = 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; }; }
[edit] Specializations of std::atomic for integral types
namespace std { template<> struct atomic</* integral */> { using value_type = /* integral */; using difference_type = value_type; static constexpr bool is_always_lock_free = /* implementation-defined */; bool is_lock_free() const volatile noexcept; bool is_lock_free() const noexcept; constexpr atomic() noexcept; constexpr atomic(/* integral */) noexcept; atomic(const atomic&) = delete; atomic& operator=(const atomic&) = delete; atomic& operator=(const atomic&) volatile = delete; void store(/* integral */, memory_order = memory_order::seq_cst) volatile noexcept; void store(/* integral */, memory_order = memory_order::seq_cst) noexcept; /* integral */ operator=(/* integral */) volatile noexcept; /* integral */ operator=(/* integral */) noexcept; /* integral */ load(memory_order = memory_order::seq_cst) const volatile noexcept; /* integral */ load(memory_order = memory_order::seq_cst) const noexcept; operator /* integral */() const volatile noexcept; operator /* integral */() const noexcept; /* integral */ exchange(/* integral */, memory_order = memory_order::seq_cst) volatile noexcept; /* integral */ exchange(/* integral */, memory_order = memory_order::seq_cst) noexcept; bool compare_exchange_weak(/* integral */&, /* integral */, memory_order, memory_order) volatile noexcept; bool compare_exchange_weak(/* integral */&, /* integral */, memory_order, memory_order) noexcept; bool compare_exchange_strong(/* integral */&, /* integral */, memory_order, memory_order) volatile noexcept; bool compare_exchange_strong(/* integral */&, /* integral */, memory_order, memory_order) noexcept; bool compare_exchange_weak(/* integral */&, /* integral */, memory_order = memory_order::seq_cst) volatile noexcept; bool compare_exchange_weak(/* integral */&, /* integral */, memory_order = memory_order::seq_cst) noexcept; bool compare_exchange_strong(/* integral */&, /* integral */, memory_order = memory_order::seq_cst) volatile noexcept; bool compare_exchange_strong(/* integral */&, /* integral */, memory_order = memory_order::seq_cst) noexcept; /* integral */ fetch_add(/* integral */, memory_order = memory_order::seq_cst) volatile noexcept; /* integral */ fetch_add(/* integral */, memory_order = memory_order::seq_cst) noexcept; /* integral */ fetch_sub(/* integral */, memory_order = memory_order::seq_cst) volatile noexcept; /* integral */ fetch_sub(/* integral */, memory_order = memory_order::seq_cst) noexcept; /* integral */ fetch_and(/* integral */, memory_order = memory_order::seq_cst) volatile noexcept; /* integral */ fetch_and(/* integral */, memory_order = memory_order::seq_cst) noexcept; /* integral */ fetch_or(/* integral */, memory_order = memory_order::seq_cst) volatile noexcept; /* integral */ fetch_or(/* integral */, memory_order = memory_order::seq_cst) noexcept; /* integral */ fetch_xor(/* integral */, memory_order = memory_order::seq_cst) volatile noexcept; /* integral */ fetch_xor(/* integral */, memory_order = memory_order::seq_cst) noexcept; /* integral */ fetch_max(/* integral */, memory_order = memory_order::seq_cst) volatile noexcept; /* integral */ fetch_max(/* integral */, memory_order = memory_order::seq_cst) noexcept; /* integral */ fetch_min(/* integral */, memory_order = memory_order::seq_cst) volatile noexcept; /* integral */ fetch_min(/* integral */, memory_order = 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 */) volatile noexcept; /* integral */ operator+=(/* integral */) noexcept; /* integral */ operator-=(/* integral */) volatile noexcept; /* integral */ operator-=(/* integral */) noexcept; /* integral */ operator&=(/* integral */) volatile noexcept; /* integral */ operator&=(/* integral */) noexcept; /* integral */ operator|=(/* integral */) volatile noexcept; /* integral */ operator|=(/* integral */) noexcept; /* integral */ operator^=(/* integral */) volatile noexcept; /* integral */ operator^=(/* integral */) 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; }; }
[edit] Specializations of std::atomic for floating-point types
namespace std { template<> struct atomic</* floating-point */> { using value_type = /* floating-point */; using difference_type = value_type; static constexpr bool is_always_lock_free = /* implementation-defined */; bool is_lock_free() const volatile noexcept; bool is_lock_free() const noexcept; constexpr atomic() noexcept; constexpr atomic(/* floating-point */) noexcept; atomic(const atomic&) = delete; atomic& operator=(const atomic&) = delete; atomic& operator=(const atomic&) volatile = delete; void store(/* floating-point */, memory_order = memory_order_seq_cst) volatile noexcept; void store(/* floating-point */, memory_order = memory_order_seq_cst) noexcept; /* floating-point */ operator=(/* floating-point */) volatile noexcept; /* floating-point */ operator=(/* floating-point */) noexcept; /* floating-point */ load(memory_order = memory_order_seq_cst) volatile noexcept; /* floating-point */ load(memory_order = memory_order_seq_cst) noexcept; operator /* floating-point */() volatile noexcept; operator /* floating-point */() noexcept; /* floating-point */ exchange(/* floating-point */, memory_order = memory_order_seq_cst) volatile noexcept; /* floating-point */ exchange(/* floating-point */, memory_order = memory_order_seq_cst) noexcept; bool compare_exchange_weak(/* floating-point */&, /* floating-point */, memory_order, memory_order) volatile noexcept; bool compare_exchange_weak(/* floating-point */&, /* floating-point */, memory_order, memory_order) noexcept; bool compare_exchange_strong(/* floating-point */&, /* floating-point */, memory_order, memory_order) volatile noexcept; bool compare_exchange_strong(/* floating-point */&, /* floating-point */, memory_order, memory_order) noexcept; bool compare_exchange_weak(/* floating-point */&, /* floating-point */, memory_order = memory_order_seq_cst) volatile noexcept; bool compare_exchange_weak(/* floating-point */&, /* floating-point */, memory_order = memory_order_seq_cst) noexcept; bool compare_exchange_strong(/* floating-point */&, /* floating-point */, memory_order = memory_order_seq_cst) volatile noexcept; bool compare_exchange_strong(/* floating-point */&, /* floating-point */, memory_order = memory_order_seq_cst) noexcept; /* floating-point */ fetch_add(/* floating-point */, memory_order = memory_order_seq_cst) volatile noexcept; /* floating-point */ fetch_add(/* floating-point */, memory_order = memory_order_seq_cst) noexcept; /* floating-point */ fetch_sub(/* floating-point */, memory_order = memory_order_seq_cst) volatile noexcept; /* floating-point */ fetch_sub(/* floating-point */, memory_order = memory_order_seq_cst) noexcept; /* floating-point */ operator+=(/* floating-point */) volatile noexcept; /* floating-point */ operator+=(/* floating-point */) noexcept; /* floating-point */ operator-=(/* floating-point */) volatile noexcept; /* floating-point */ operator-=(/* floating-point */) noexcept; void wait(/* floating-point */, memory_order = memory_order::seq_cst) const volatile noexcept; void wait(/* floating-point */, 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; }; }
[edit] Specializations of std::atomic for pointer types
namespace std { template<class T> struct atomic<T*> { using value_type = T*; using difference_type = ptrdiff_t; static constexpr bool is_always_lock_free = /* implementation-defined */; bool is_lock_free() const volatile noexcept; bool is_lock_free() const noexcept; constexpr atomic() noexcept; constexpr atomic(T*) noexcept; atomic(const atomic&) = delete; atomic& operator=(const atomic&) = delete; atomic& operator=(const atomic&) volatile = delete; void store(T*, memory_order = memory_order::seq_cst) volatile noexcept; void store(T*, memory_order = memory_order::seq_cst) noexcept; T* operator=(T*) volatile noexcept; T* operator=(T*) noexcept; T* load(memory_order = memory_order::seq_cst) const volatile noexcept; T* load(memory_order = memory_order::seq_cst) const noexcept; operator T*() const volatile noexcept; operator T*() const noexcept; T* exchange(T*, memory_order = memory_order::seq_cst) volatile noexcept; T* exchange(T*, memory_order = memory_order::seq_cst) noexcept; bool compare_exchange_weak(T*&, T*, memory_order, memory_order) volatile noexcept; bool compare_exchange_weak(T*&, T*, memory_order, memory_order) noexcept; bool compare_exchange_strong(T*&, T*, memory_order, memory_order) volatile noexcept; bool compare_exchange_strong(T*&, T*, memory_order, memory_order) noexcept; bool compare_exchange_weak(T*&, T*, memory_order = memory_order::seq_cst) volatile noexcept; bool compare_exchange_weak(T*&, T*, memory_order = memory_order::seq_cst) noexcept; bool compare_exchange_strong(T*&, T*, memory_order = memory_order::seq_cst) volatile noexcept; bool compare_exchange_strong(T*&, T*, memory_order = memory_order::seq_cst) noexcept; T* fetch_add(ptrdiff_t, memory_order = memory_order::seq_cst) volatile noexcept; T* fetch_add(ptrdiff_t, memory_order = memory_order::seq_cst) noexcept; T* fetch_sub(ptrdiff_t, memory_order = memory_order::seq_cst) volatile noexcept; T* fetch_sub(ptrdiff_t, memory_order = memory_order::seq_cst) noexcept; T* fetch_max(T*, memory_order = memory_order::seq_cst) volatile noexcept; T* fetch_max(T*, memory_order = memory_order::seq_cst) noexcept; T* fetch_min(T*, memory_order = memory_order::seq_cst) volatile noexcept; T* fetch_min(T*, memory_order = 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) volatile noexcept; T* operator+=(ptrdiff_t) noexcept; T* operator-=(ptrdiff_t) volatile noexcept; T* operator-=(ptrdiff_t) 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; }; }
[edit] Class template std::atomic_ref
namespace std { template<class T> struct atomic_ref { private: T* ptr; // exposition only public: using value_type = T; static constexpr size_t required_alignment = /* implementation-defined */; static constexpr bool is_always_lock_free = /* implementation-defined */; bool is_lock_free() const noexcept; explicit atomic_ref(T&); atomic_ref(const atomic_ref&) noexcept; atomic_ref& operator=(const atomic_ref&) = delete; void store(T, memory_order = memory_order_seq_cst) const noexcept; T operator=(T) const noexcept; T load(memory_order = memory_order_seq_cst) const noexcept; operator T() const noexcept; T exchange(T, memory_order = memory_order_seq_cst) const noexcept; bool compare_exchange_weak(T&, T, memory_order, memory_order) const noexcept; bool compare_exchange_strong(T&, T, memory_order, memory_order) const noexcept; bool compare_exchange_weak(T&, T, memory_order = memory_order_seq_cst) const noexcept; bool compare_exchange_strong(T&, T, memory_order = memory_order_seq_cst) const noexcept; void wait(T, memory_order = memory_order::seq_cst) const noexcept; void notify_one() const noexcept; void notify_all() const noexcept; }; }
[edit] Specializations of std::atomic_ref for integral types
namespace std { template<> struct atomic_ref</* integral */> { private: /* integral */* ptr; // exposition only public: using value_type = /* integral */; using difference_type = value_type; static constexpr size_t required_alignment = /* implementation-defined */; static constexpr bool is_always_lock_free = /* implementation-defined */; bool is_lock_free() const noexcept; explicit atomic_ref(/* integral */&); atomic_ref(const atomic_ref&) noexcept; atomic_ref& operator=(const atomic_ref&) = delete; void store(/* integral */, memory_order = memory_order_seq_cst) const noexcept; /* integral */ operator=(/* integral */) const noexcept; /* integral */ load(memory_order = memory_order_seq_cst) const noexcept; operator /* integral */() const noexcept; /* integral */ exchange(/* integral */, memory_order = memory_order_seq_cst) const noexcept; bool compare_exchange_weak(/* integral */&, /* integral */, memory_order, memory_order) const noexcept; bool compare_exchange_strong(/* integral */&, /* integral */, memory_order, memory_order) const noexcept; bool compare_exchange_weak(/* integral */&, /* integral */, memory_order = memory_order_seq_cst) const noexcept; bool compare_exchange_strong(/* integral */&, /* integral */, memory_order = memory_order_seq_cst) const noexcept; /* integral */ fetch_add(/* integral */, memory_order = memory_order_seq_cst) const noexcept; /* integral */ fetch_sub(/* integral */, memory_order = memory_order_seq_cst) const noexcept; /* integral */ fetch_and(/* integral */, memory_order = memory_order_seq_cst) const noexcept; /* integral */ fetch_or(/* integral */, memory_order = memory_order_seq_cst) const noexcept; /* integral */ fetch_xor(/* integral */, memory_order = memory_order_seq_cst) const noexcept; /* integral */ fetch_max(/* integral */, memory_order = memory_order_seq_cst) const noexcept; /* integral */ fetch_min(/* integral */, memory_order = memory_order_seq_cst) const noexcept; /* integral */ operator++(int) const noexcept; /* integral */ operator--(int) const noexcept; /* integral */ operator++() const noexcept; /* integral */ operator--() const noexcept; /* integral */ operator+=(/* integral */) const noexcept; /* integral */ operator-=(/* integral */) const noexcept; /* integral */ operator&=(/* integral */) const noexcept; /* integral */ operator
[edit] Specializations of std::atomic_ref for floating-point types
namespace std { template<> struct atomic_ref</* floating-point */> { private: /* floating-point */* ptr; // exposition only public: using value_type = /* floating-point */; using difference_type = value_type; static constexpr size_t required_alignment = /* implementation-defined */; static constexpr bool is_always_lock_free = /* implementation-defined */; bool is_lock_free() const noexcept; explicit atomic_ref(/* floating-point */&); atomic_ref(const atomic_ref&) noexcept; atomic_ref& operator=(const atomic_ref&) = delete; void store(/* floating-point */, memory_order = memory_order_seq_cst) const noexcept; /* floating-point */ operator=(/* floating-point */) const noexcept; /* floating-point */ load(memory_order = memory_order_seq_cst) const noexcept; operator /* floating-point */() const noexcept; /* floating-point */ exchange(/* floating-point */, memory_order = memory_order_seq_cst) const noexcept; bool compare_exchange_weak(/* floating-point */&, /* floating-point */, memory_order, memory_order) const noexcept; bool compare_exchange_strong(/* floating-point */&, /* floating-point */, memory_order, memory_order) const noexcept; bool compare_exchange_weak(/* floating-point */&, /* floating-point */, memory_order = memory_order_seq_cst) const noexcept; bool compare_exchange_strong(/* floating-point */&, /* floating-point */, memory_order = memory_order_seq_cst) const noexcept; /* floating-point */ fetch_add(/* floating-point */, memory_order = memory_order_seq_cst) const noexcept; /* floating-point */ fetch_sub(/* floating-point */, memory_order = memory_order_seq_cst) const noexcept; /* floating-point */ operator+=(/* floating-point */) const noexcept; /* floating-point */ operator-=(/* floating-point */) const noexcept; void wait(/* floating-point */, memory_order = memory_order::seq_cst) const noexcept; void notify_one() const noexcept; void notify_all() const noexcept; }; }
[edit] Specializations of std::atomic_ref for pointer types
namespace std { template<class T> struct atomic_ref<T*> { private: T** ptr; // exposition only public: using value_type = T*; using difference_type = ptrdiff_t; static constexpr size_t required_alignment = /* implementation-defined */; static constexpr bool is_always_lock_free = /* implementation-defined */; bool is_lock_free() const noexcept; explicit atomic_ref(T*&); atomic_ref(const atomic_ref&) noexcept; atomic_ref& operator=(const atomic_ref&) = delete; void store(T*, memory_order = memory_order_seq_cst) const noexcept; T* operator=(T*) const noexcept; T* load(memory_order = memory_order_seq_cst) const noexcept; operator T*() const noexcept; T* exchange(T*, memory_order = memory_order_seq_cst) const noexcept; bool compare_exchange_weak(T*&, T*, memory_order, memory_order) const noexcept; bool compare_exchange_strong(T*&, T*, memory_order, memory_order) const noexcept; bool compare_exchange_weak(T*&, T*, memory_order = memory_order_seq_cst) const noexcept; bool compare_exchange_strong(T*&, T*, memory_order = memory_order_seq_cst) const noexcept; T* fetch_add(difference_type, memory_order = memory_order_seq_cst) const noexcept; T* fetch_sub(difference_type, memory_order = memory_order_seq_cst) const noexcept; T* fetch_max(T *, memory_order = memory_order::seq_cst) const noexcept; T* fetch_min(T *, memory_order = memory_order::seq_cst) const noexcept; T* operator++(int) const noexcept; T* operator--(int) const noexcept; T* operator++() const noexcept; T* operator--() const noexcept; T* operator+=(difference_type) const noexcept; T* operator-=(difference_type) const noexcept; void wait(T*, memory_order = memory_order::seq_cst) const noexcept; void notify_one() const noexcept; void notify_all() const noexcept; }; }
[edit] Class std::atomic_flag
namespace std { struct atomic_flag { constexpr atomic_flag() noexcept; 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 = memory_order::seq_cst) const volatile noexcept; bool test(memory_order = memory_order::seq_cst) const noexcept; bool test_and_set(memory_order = memory_order::seq_cst) volatile noexcept; bool test_and_set(memory_order = memory_order::seq_cst) noexcept; void clear(memory_order = memory_order::seq_cst) volatile noexcept; void clear(memory_order = 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; }; }
