std::atomic_flag_notify_all - cppreference.com (original) (raw)
| Defined in header | ||
|---|---|---|
| void atomic_flag_notify_all( std::atomic_flag* object ) noexcept; | (1) | (since C++20) |
| void atomic_flag_notify_all( volatile std::atomic_flag* object ) noexcept; | (2) | (since C++20) |
Performs atomic notifying operations.
Unblocks all threads blocked in atomic waiting operations (i.e. std::atomic_flag_wait(), std::atomic_flag_wait_explicit(), or std::atomic_flag::wait()) on *object, if there are any; otherwise does nothing.
Equivalent to object->notify_all().
[edit] Parameters
| object | - | pointer to the atomic_flag object to notify |
|---|
[edit] Return value
(none)
[edit] Notes
This form of change-detection is often more efficient than simple polling or pure spinlocks.