33 Concurrency support library [thread]

33.5 Atomic operations [atomics]

33.5.2 Header <atomic> synopsis [atomics.syn]

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namespace std { // [atomics.order], order and consistency enum class memory_order : unspecified; // freestanding inline constexpr memory_order memory_order_relaxed = memory_order::relaxed; // freestanding inline constexpr memory_order memory_order_consume = memory_order::consume; // freestanding inline constexpr memory_order memory_order_acquire = memory_order::acquire; // freestanding inline constexpr memory_order memory_order_release = memory_order::release; // freestanding inline constexpr memory_order memory_order_acq_rel = memory_order::acq_rel; // freestanding inline constexpr memory_order memory_order_seq_cst = memory_order::seq_cst; // freestanding template<class T> T kill_dependency(T y) noexcept; // freestanding } // [atomics.lockfree], lock-free property #define ATOMIC_BOOL_LOCK_FREE unspecified // freestanding #define ATOMIC_CHAR_LOCK_FREE unspecified // freestanding #define ATOMIC_CHAR8_T_LOCK_FREE unspecified // freestanding #define ATOMIC_CHAR16_T_LOCK_FREE unspecified // freestanding #define ATOMIC_CHAR32_T_LOCK_FREE unspecified // freestanding #define ATOMIC_WCHAR_T_LOCK_FREE unspecified // freestanding #define ATOMIC_SHORT_LOCK_FREE unspecified // freestanding #define ATOMIC_INT_LOCK_FREE unspecified // freestanding #define ATOMIC_LONG_LOCK_FREE unspecified // freestanding #define ATOMIC_LLONG_LOCK_FREE unspecified // freestanding #define ATOMIC_POINTER_LOCK_FREE unspecified // freestanding namespace std { // [atomics.ref.generic], class template atomic_ref template<class T> struct atomic_ref; // freestanding // [atomics.ref.pointer], partial specialization for pointers template<class T> struct atomic_ref<T*>; // freestanding // [atomics.types.generic], class template atomic template<class T> struct atomic; // freestanding // [atomics.types.pointer], partial specialization for pointers template<class T> struct atomic<T*>; // freestanding // [atomics.nonmembers], non-member functions template<class T> bool atomic_is_lock_free(const volatile atomic<T>*) noexcept; // freestanding template<class T> bool atomic_is_lock_free(const atomic<T>*) noexcept; // freestanding template<class T> void atomic_store(volatile atomic<T>*, // freestanding typename atomic<T>::value_type) noexcept; template<class T> void atomic_store(atomic<T>*, typename atomic<T>::value_type) noexcept; // freestanding template<class T> void atomic_store_explicit(volatile atomic<T>*, // freestanding typename atomic<T>::value_type, memory_order) noexcept; template<class T> void atomic_store_explicit(atomic<T>*, typename atomic<T>::value_type, // freestanding memory_order) noexcept; template<class T> T atomic_load(const volatile atomic<T>*) noexcept; // freestanding template<class T> T atomic_load(const atomic<T>*) noexcept; // freestanding template<class T> T atomic_load_explicit(const volatile atomic<T>*, memory_order) noexcept; // freestanding template<class T> T atomic_load_explicit(const atomic<T>*, memory_order) noexcept; // freestanding template<class T> T atomic_exchange(volatile atomic<T>*, // freestanding typename atomic<T>::value_type) noexcept; template<class T> T atomic_exchange(atomic<T>*, typename atomic<T>::value_type) noexcept; // freestanding template<class T> T atomic_exchange_explicit(volatile atomic<T>*, // freestanding typename atomic<T>::value_type, memory_order) noexcept; template<class T> T atomic_exchange_explicit(atomic<T>*, typename atomic<T>::value_type, // freestanding memory_order) noexcept; template<class T> bool atomic_compare_exchange_weak(volatile atomic<T>*, // freestanding typename atomic<T>::value_type*, typename atomic<T>::value_type) noexcept; template<class T> bool atomic_compare_exchange_weak(atomic<T>*, // freestanding typename atomic<T>::value_type*, typename atomic<T>::value_type) noexcept; template<class T> bool atomic_compare_exchange_strong(volatile atomic<T>*, // freestanding typename atomic<T>::value_type*, typename atomic<T>::value_type) noexcept; template<class T> bool atomic_compare_exchange_strong(atomic<T>*, // freestanding typename atomic<T>::value_type*, typename atomic<T>::value_type) noexcept; template<class T> bool atomic_compare_exchange_weak_explicit(volatile atomic<T>*, // freestanding 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>*, // freestanding 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>*, // freestanding 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>*, // freestanding 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>*, // freestanding typename atomic<T>::difference_type) noexcept; template<class T> T atomic_fetch_add(atomic<T>*, typename atomic<T>::difference_type) noexcept; // freestanding template<class T> T atomic_fetch_add_explicit(volatile atomic<T>*, // freestanding typename atomic<T>::difference_type, memory_order) noexcept; template<class T> T atomic_fetch_add_explicit(atomic<T>*, typename atomic<T>::difference_type, // freestanding memory_order) noexcept; template<class T> T atomic_fetch_sub(volatile atomic<T>*, // freestanding typename atomic<T>::difference_type) noexcept; template<class T> T atomic_fetch_sub(atomic<T>*, typename atomic<T>::difference_type) noexcept; // freestanding template<class T> T atomic_fetch_sub_explicit(volatile atomic<T>*, // freestanding typename atomic<T>::difference_type, memory_order) noexcept; template<class T> T atomic_fetch_sub_explicit(atomic<T>*, typename atomic<T>::difference_type, // freestanding memory_order) noexcept; template<class T> T atomic_fetch_and(volatile atomic<T>*, // freestanding typename atomic<T>::value_type) noexcept; template<class T> T atomic_fetch_and(atomic<T>*, typename atomic<T>::value_type) noexcept; // freestanding template<class T> T atomic_fetch_and_explicit(volatile atomic<T>*, // freestanding typename atomic<T>::value_type, memory_order) noexcept; template<class T> T atomic_fetch_and_explicit(atomic<T>*, typename atomic<T>::value_type, // freestanding memory_order) noexcept; template<class T> T atomic_fetch_or(volatile atomic<T>*, // freestanding typename atomic<T>::value_type) noexcept; template<class T> T atomic_fetch_or(atomic<T>*, typename atomic<T>::value_type) noexcept; // freestanding template<class T> T atomic_fetch_or_explicit(volatile atomic<T>*, // freestanding typename atomic<T>::value_type, memory_order) noexcept; template<class T> T atomic_fetch_or_explicit(atomic<T>*, typename atomic<T>::value_type, // freestanding memory_order) noexcept; template<class T> T atomic_fetch_xor(volatile atomic<T>*, // freestanding typename atomic<T>::value_type) noexcept; template<class T> T atomic_fetch_xor(atomic<T>*, typename atomic<T>::value_type) noexcept; // freestanding template<class T> T atomic_fetch_xor_explicit(volatile atomic<T>*, // freestanding typename atomic<T>::value_type, memory_order) noexcept; template<class T> T atomic_fetch_xor_explicit(atomic<T>*, typename atomic<T>::value_type, // freestanding memory_order) noexcept; template<class T> void atomic_wait(const volatile atomic<T>*, // freestanding typename atomic<T>::value_type) noexcept; template<class T> void atomic_wait(const atomic<T>*, typename atomic<T>::value_type) noexcept; // freestanding template<class T> void atomic_wait_explicit(const volatile atomic<T>*, // freestanding typename atomic<T>::value_type, memory_order) noexcept; template<class T> void atomic_wait_explicit(const atomic<T>*, typename atomic<T>::value_type, // freestanding memory_order) noexcept; template<class T> void atomic_notify_one(volatile atomic<T>*) noexcept; // freestanding template<class T> void atomic_notify_one(atomic<T>*) noexcept; // freestanding template<class T> void atomic_notify_all(volatile atomic<T>*) noexcept; // freestanding template<class T> void atomic_notify_all(atomic<T>*) noexcept; // freestanding // [atomics.alias], type aliases using atomic_bool = atomic<bool>; // freestanding using atomic_char = atomic<char>; // freestanding using atomic_schar = atomic<signed char>; // freestanding using atomic_uchar = atomic<unsigned char>; // freestanding using atomic_short = atomic<short>; // freestanding using atomic_ushort = atomic<unsigned short>; // freestanding using atomic_int = atomic<int>; // freestanding using atomic_uint = atomic<unsigned int>; // freestanding using atomic_long = atomic<long>; // freestanding using atomic_ulong = atomic<unsigned long>; // freestanding using atomic_llong = atomic<long long>; // freestanding using atomic_ullong = atomic<unsigned long long>; // freestanding using atomic_char8_t = atomic<char8_t>; // freestanding using atomic_char16_t = atomic<char16_t>; // freestanding using atomic_char32_t = atomic<char32_t>; // freestanding using atomic_wchar_t = atomic<wchar_t>; // freestanding using atomic_int8_t = atomic<int8_t>; // freestanding using atomic_uint8_t = atomic<uint8_t>; // freestanding using atomic_int16_t = atomic<int16_t>; // freestanding using atomic_uint16_t = atomic<uint16_t>; // freestanding using atomic_int32_t = atomic<int32_t>; // freestanding using atomic_uint32_t = atomic<uint32_t>; // freestanding using atomic_int64_t = atomic<int64_t>; // freestanding using atomic_uint64_t = atomic<uint64_t>; // freestanding using atomic_int_least8_t = atomic<int_least8_t>; // freestanding using atomic_uint_least8_t = atomic<uint_least8_t>; // freestanding using atomic_int_least16_t = atomic<int_least16_t>; // freestanding using atomic_uint_least16_t = atomic<uint_least16_t>; // freestanding using atomic_int_least32_t = atomic<int_least32_t>; // freestanding using atomic_uint_least32_t = atomic<uint_least32_t>; // freestanding using atomic_int_least64_t = atomic<int_least64_t>; // freestanding using atomic_uint_least64_t = atomic<uint_least64_t>; // freestanding using atomic_int_fast8_t = atomic<int_fast8_t>; // freestanding using atomic_uint_fast8_t = atomic<uint_fast8_t>; // freestanding using atomic_int_fast16_t = atomic<int_fast16_t>; // freestanding using atomic_uint_fast16_t = atomic<uint_fast16_t>; // freestanding using atomic_int_fast32_t = atomic<int_fast32_t>; // freestanding using atomic_uint_fast32_t = atomic<uint_fast32_t>; // freestanding using atomic_int_fast64_t = atomic<int_fast64_t>; // freestanding using atomic_uint_fast64_t = atomic<uint_fast64_t>; // freestanding using atomic_intptr_t = atomic<intptr_t>; // freestanding using atomic_uintptr_t = atomic<uintptr_t>; // freestanding using atomic_size_t = atomic<size_t>; // freestanding using atomic_ptrdiff_t = atomic<ptrdiff_t>; // freestanding using atomic_intmax_t = atomic<intmax_t>; // freestanding using atomic_uintmax_t = atomic<uintmax_t>; // freestanding using atomic_signed_lock_free = see below; using atomic_unsigned_lock_free = see below; // [atomics.flag], flag type and operations struct atomic_flag; // freestanding bool atomic_flag_test(const volatile atomic_flag*) noexcept; // freestanding bool atomic_flag_test(const atomic_flag*) noexcept; // freestanding bool atomic_flag_test_explicit(const volatile atomic_flag*, // freestanding memory_order) noexcept; bool atomic_flag_test_explicit(const atomic_flag*, memory_order) noexcept; // freestanding bool atomic_flag_test_and_set(volatile atomic_flag*) noexcept; // freestanding bool atomic_flag_test_and_set(atomic_flag*) noexcept; // freestanding bool atomic_flag_test_and_set_explicit(volatile atomic_flag*, // freestanding memory_order) noexcept; bool atomic_flag_test_and_set_explicit(atomic_flag*, memory_order) noexcept; // freestanding void atomic_flag_clear(volatile atomic_flag*) noexcept; // freestanding void atomic_flag_clear(atomic_flag*) noexcept; // freestanding void atomic_flag_clear_explicit(volatile atomic_flag*, memory_order) noexcept; // freestanding void atomic_flag_clear_explicit(atomic_flag*, memory_order) noexcept; // freestanding void atomic_flag_wait(const volatile atomic_flag*, bool) noexcept; // freestanding void atomic_flag_wait(const atomic_flag*, bool) noexcept; // freestanding void atomic_flag_wait_explicit(const volatile atomic_flag*, // freestanding bool, memory_order) noexcept; void atomic_flag_wait_explicit(const atomic_flag*, // freestanding bool, memory_order) noexcept; void atomic_flag_notify_one(volatile atomic_flag*) noexcept; // freestanding void atomic_flag_notify_one(atomic_flag*) noexcept; // freestanding void atomic_flag_notify_all(volatile atomic_flag*) noexcept; // freestanding void atomic_flag_notify_all(atomic_flag*) noexcept; // freestanding #define ATOMIC_FLAG_INIT see below // freestanding // [atomics.fences], fences extern "C" void atomic_thread_fence(memory_order) noexcept; // freestanding extern "C" void atomic_signal_fence(memory_order) noexcept; // freestanding }