std::atomic_flag::notify_one

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std::atomic_flag
 
(since C++20)
void notify_one() noexcept;
void notify_one() volatile noexcept;

Performs atomic notifying operations.

If there is a thread blocked in atomic waiting operation (i.e. wait()) on *this, then unblocks at least one such thread; otherwise does nothing.

Return value

(none)

Notes

This form of change-detection is often more efficient than simple polling or pure spinlocks.

Example

This section is incomplete
Reason: no example

See also

(C++20)
 blocks the thread until notified and the atomic value changes
(public member function)
(C++20)(C++20)
 blocks the thread until notified and the flag changes
(function)
(C++20)
 notifies a thread blocked in atomic_flag_wait
(function)
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