std::atomic_flag::atomic_flag
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std::atomic_flag
Member functions
atomic_flag::atomic_flag
(C++20)
(C++20)
(C++20)
(C++20)
Defined in header
<atomic>
(1)
atomic_flag() noexcept = default;
(since C++11) (until C++20)
constexpr atomic_flag() noexcept;
(since C++20)
atomic_flag( const atomic_flag& ) = delete;
(2)
(since C++11)
Constructs a new std::atomic_flag .
1) Trivial default constructor, initializes std::atomic_flag to unspecified state.
(until C++20)1) Initializes std::atomic_flag to clear state.
(since C++20)2) The copy constructor is deleted; std::atomic_flag is not copyable.
In addition, std::atomic_flag can be value-initialized to clear state with the expression ATOMIC_FLAG_INIT . For an atomic_flag with static storage duration, this guarantees static initialization: the flag can be used in constructors of static objects.