Template:cpp/atomic/atomic/notify one

void notify_one() noexcept;	(1)	(since C++20)
void notify_one() volatile noexcept;	(2)	(since C++20)

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.

See also

wait (C++20)	blocks the thread until notified and the atomic value changes (public member function of Template:cpp/atomic//title)
atomic_waitatomic_wait_explicit (C++20)(C++20)	blocks the thread until notified and the atomic value changes (function template)
atomic_notify_one (C++20)	notifies a thread blocked in atomic_wait (function template)