std::atomic_ref<T>::notify_one
From cppreference.com
< cpp | atomic | atomic ref
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
, 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.
Contents |
[edit] Notes
This form of change-detection is often more efficient than simple polling or pure spinlocks.
[edit] Example
This section is incomplete Reason: no example |
Defect reports
The following behavior-changing defect reports were applied retroactively to previously published C++ standards.
DR | Applied to | Behavior as published | Correct behavior |
---|---|---|---|
LWG 3508 (P3323R1) |
C++20 | notify_one was meaningless for const T
|
constrained to accept only non-const T
|
[edit] See also
blocks the thread until notified and the atomic value changes (public member function) | |
(C++20)(C++20) |
blocks the thread until notified and the atomic value changes (function template) |
(C++20) |
notifies a thread blocked in atomic_wait (function template) |