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) |
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. This macro is deprecated. (since C++20).
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(C++11) | initializes an std::atomic_flag to false (macro constant) |
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