std::atomic_ref::notify_one - cppreference.com (original) (raw)

| void notify_one() const noexcept; | | (constexpr since C++26) | | ---------------------------------- | | ----------------------- |

Performs atomic notifying operations.

If there is a thread blocked in atomic waiting operation (i.e. wait()) on *_[ptr](../atomic%5Fref.html#ptr "cpp/atomic/atomic ref")_, then unblocks at least one such thread; otherwise does nothing. This overload participates in overload resolution only if std::is_const_v<T> is false.

[edit] Notes

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

[edit] Example

Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

[edit] See also