Standard library header <stdatomic.h> (C++23)
This header was originally in the C standard library (<stdatomic.h>).
This header is part of the concurrency support library.
It is unspecified whether <stdatomic.h> provides any declarations in namespace std.
Macros |
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(C++23) | compatibility macro such that _Atomic(T) is identical to std::atomic<T> (function macro) |
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(C++11) | initializes an std::atomic_flag to false (macro constant) |
Types |
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(C++11) | the lock-free boolean atomic type (class) |
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(C++11) | defines memory ordering constraints for the given atomic operation (enum) |
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(C++11) |
std::atomic<bool> (typedef) |
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(C++11) |
std::atomic<char> (typedef) |
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(C++11) |
std::atomic<signedchar> (typedef) |
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(C++11) |
std::atomic<unsignedchar> (typedef) |
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(C++11) |
std::atomic<short> (typedef) |
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(C++11) |
std::atomic<unsignedshort> (typedef) |
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(C++11) |
std::atomic<int> (typedef) |
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(C++11) |
std::atomic<unsignedint> (typedef) |
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(C++11) |
std::atomic<long> (typedef) |
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(C++11) |
std::atomic<unsignedlong> (typedef) |
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(C++11) |
std::atomic<longlong> (typedef) |
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(C++11) |
std::atomic<unsignedlonglong> (typedef) |
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(C++20) |
std::atomic<char8_t> (typedef) |
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(C++11) |
std::atomic<char16_t> (typedef) |
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(C++11) |
std::atomic<char32_t> (typedef) |
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(C++11) |
std::atomic<wchar_t> (typedef) |
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(C++11)(optional) |
std::atomic<std::int8_t> (typedef) |
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(C++11)(optional) |
std::atomic<std::uint8_t> (typedef) |
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(C++11)(optional) |
std::atomic<std::int16_t> (typedef) |
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(C++11)(optional) |
std::atomic<std::uint16_t> (typedef) |
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(C++11)(optional) |
std::atomic<std::int32_t> (typedef) |
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(C++11)(optional) |
std::atomic<std::uint32_t> (typedef) |
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(C++11)(optional) |
std::atomic<std::int64_t> (typedef) |
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(C++11)(optional) |
std::atomic<std::uint64_t> (typedef) |
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(C++11) |
std::atomic<std::int_least8_t> (typedef) |
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(C++11) |
std::atomic<std::uint_least8_t> (typedef) |
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(C++11) |
std::atomic<std::int_least16_t> (typedef) |
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(C++11) |
std::atomic<std::uint_least16_t> (typedef) |
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(C++11) |
std::atomic<std::int_least32_t> (typedef) |
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(C++11) |
std::atomic<std::uint_least32_t> (typedef) |
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(C++11) |
std::atomic<std::int_least64_t> (typedef) |
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(C++11) |
std::atomic<std::uint_least64_t> (typedef) |
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(C++11) |
std::atomic<std::int_fast8_t> (typedef) |
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(C++11) |
std::atomic<std::uint_fast8_t> (typedef) |
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(C++11) |
std::atomic<std::int_fast16_t> (typedef) |
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(C++11) |
std::atomic<std::uint_fast16_t> (typedef) |
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(C++11) |
std::atomic<std::int_fast32_t> (typedef) |
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(C++11) |
std::atomic<std::uint_fast32_t> (typedef) |
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(C++11) |
std::atomic<std::int_fast64_t> (typedef) |
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(C++11) |
std::atomic<std::uint_fast64_t> (typedef) |
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(C++11)(optional) |
std::atomic<std::intptr_t> (typedef) |
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(C++11)(optional) |
std::atomic<std::uintptr_t> (typedef) |
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(C++11) |
std::atomic<std::size_t> (typedef) |
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(C++11) |
std::atomic<std::ptrdiff_t> (typedef) |
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(C++11) |
std::atomic<std::intmax_t> (typedef) |
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(C++11) |
std::atomic<std::uintmax_t> (typedef) |
Functions |
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(C++11) | checks if the atomic type's operations are lock-free (function template) |
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(C++11)(C++11) | atomically replaces the value of the atomic object with a non-atomic argument (function template) |
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(C++11)(C++11) | atomically obtains the value stored in an atomic object (function template) |
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(C++11)(C++11) | atomically replaces the value of the atomic object with non-atomic argument and returns the old value of the atomic (function template) |
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(C++11)(C++11)(C++11)(C++11) | atomically compares the value of the atomic object with non-atomic argument and performs atomic exchange if equal or atomic load if not (function template) |
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(C++11)(C++11) | adds a non-atomic value to an atomic object and obtains the previous value of the atomic (function template) |
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(C++11)(C++11) | subtracts a non-atomic value from an atomic object and obtains the previous value of the atomic (function template) |
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(C++11)(C++11) | replaces the atomic object with the result of bitwise AND with a non-atomic argument and obtains the previous value of the atomic (function template) |
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(C++11)(C++11) | replaces the atomic object with the result of bitwise OR with a non-atomic argument and obtains the previous value of the atomic (function template) |
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(C++11)(C++11) | replaces the atomic object with the result of bitwise XOR with a non-atomic argument and obtains the previous value of the atomic (function template) |
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(C++11)(C++11) | atomically sets the flag to true and returns its previous value (function) |
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(C++11)(C++11) | atomically sets the value of the flag to false (function) |
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(C++11) | generic memory order-dependent fence synchronization primitive (function) |
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(C++11) | fence between a thread and a signal handler executed in the same thread (function) |
Synopsis
template<class T> using /*std-atomic*/ = std::atomic<T>; // exposition-only #define _Atomic(T) /*std-atomic*/<T> #define ATOMIC_BOOL_LOCK_FREE /* see description */ #define ATOMIC_CHAR_LOCK_FREE /* see description */ #define ATOMIC_CHAR8_T_LOCK_FREE /* see description */ #define ATOMIC_CHAR16_T_LOCK_FREE /* see description */ #define ATOMIC_CHAR32_T_LOCK_FREE /* see description */ #define ATOMIC_WCHAR_T_LOCK_FREE /* see description */ #define ATOMIC_SHORT_LOCK_FREE /* see description */ #define ATOMIC_INT_LOCK_FREE /* see description */ #define ATOMIC_LONG_LOCK_FREE /* see description */ #define ATOMIC_LLONG_LOCK_FREE /* see description */ #define ATOMIC_POINTER_LOCK_FREE /* see description */ using std::memory_order; // see description using std::memory_order_relaxed; // see description using std::memory_order_consume; // see description using std::memory_order_acquire; // see description using std::memory_order_release; // see description using std::memory_order_acq_rel; // see description using std::memory_order_seq_cst; // see description using std::atomic_flag; // see description using std::atomic_bool; // see description using std::atomic_char; // see description using std::atomic_schar; // see description using std::atomic_uchar; // see description using std::atomic_short; // see description using std::atomic_ushort; // see description using std::atomic_int; // see description using std::atomic_uint; // see description using std::atomic_long; // see description using std::atomic_ulong; // see description using std::atomic_llong; // see description using std::atomic_ullong; // see description using std::atomic_char8_t; // see description using std::atomic_char16_t; // see description using std::atomic_char32_t; // see description using std::atomic_wchar_t; // see description using std::atomic_int8_t; // see description using std::atomic_uint8_t; // see description using std::atomic_int16_t; // see description using std::atomic_uint16_t; // see description using std::atomic_int32_t; // see description using std::atomic_uint32_t; // see description using std::atomic_int64_t; // see description using std::atomic_uint64_t; // see description using std::atomic_int_least8_t; // see description using std::atomic_uint_least8_t; // see description using std::atomic_int_least16_t; // see description using std::atomic_uint_least16_t; // see description using std::atomic_int_least32_t; // see description using std::atomic_uint_least32_t; // see description using std::atomic_int_least64_t; // see description using std::atomic_uint_least64_t; // see description using std::atomic_int_fast8_t; // see description using std::atomic_uint_fast8_t; // see description using std::atomic_int_fast16_t; // see description using std::atomic_uint_fast16_t; // see description using std::atomic_int_fast32_t; // see description using std::atomic_uint_fast32_t; // see description using std::atomic_int_fast64_t; // see description using std::atomic_uint_fast64_t; // see description using std::atomic_intptr_t; // see description using std::atomic_uintptr_t; // see description using std::atomic_size_t; // see description using std::atomic_ptrdiff_t; // see description using std::atomic_intmax_t; // see description using std::atomic_uintmax_t; // see description using std::atomic_is_lock_free; // see description using std::atomic_load; // see description using std::atomic_load_explicit; // see description using std::atomic_store; // see description using std::atomic_store_explicit; // see description using std::atomic_exchange; // see description using std::atomic_exchange_explicit; // see description using std::atomic_compare_exchange_strong; // see description using std::atomic_compare_exchange_strong_explicit; // see description using std::atomic_compare_exchange_weak; // see description using std::atomic_compare_exchange_weak_explicit; // see description using std::atomic_fetch_add; // see description using std::atomic_fetch_add_explicit; // see description using std::atomic_fetch_sub; // see description using std::atomic_fetch_sub_explicit; // see description using std::atomic_fetch_and; // see description using std::atomic_fetch_and_explicit; // see description using std::atomic_fetch_or; // see description using std::atomic_fetch_or_explicit; // see description using std::atomic_fetch_xor; // see description using std::atomic_fetch_xor_explicit; // see description using std::atomic_flag_test_and_set; // see description using std::atomic_flag_test_and_set_explicit; // see description using std::atomic_flag_clear; // see description using std::atomic_flag_clear_explicit; // see description #define ATOMIC_FLAG_INIT /* see description */ using std::atomic_thread_fence; // see description using std::atomic_signal_fence; // see description;
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