Defined in header <atomic> | ||
|---|---|---|
| (since C++20) | ||
void atomic_flag_notify_one( std::atomic_flag* object ) noexcept; | ||
void atomic_flag_notify_one( volatile std::atomic_flag* object ) noexcept; |
Performs atomic notifying operations.
If there is a thread blocked in an atomic waiting operation (i.e. std::atomic_flag_wait(), std::atomic_flag_wait_explicit(), or std::atomic_flag::wait()) on *object, then unblocks at least one such thread; otherwise does nothing.
Equivalent to object->notify_one().
| object | - | pointer to the atomic_flag object to notify |
(none).
This form of change-detection is often more efficient than simple polling or pure spinlocks.
|
(C++20) | notifies at least one thread waiting on the atomic object (public member function of std::atomic_flag) |
|
(C++20) | notifies all threads blocked waiting on the atomic object (public member function of std::atomic_flag) |
|
(C++20) | notifies all threads blocked in atomic_flag_wait (function) |
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