std::atomic_flag_notify_one
Defined in header <atomic> |
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(1) | (since C++20) |
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(2) | (since C++20) |
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().
Parameters
| object | - | pointer to the atomic_flag object to notify |
Return value
(none)
Notes
This form of change-detection is often more efficient than simple polling or pure spinlocks.
Example
See also
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(C++20)
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notifies at least one thread waiting on the atomic object (public member function of std::atomic_flag) |
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(C++20)
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notifies all threads blocked waiting on the atomic object (public member function of std::atomic_flag) |
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(C++20)
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notifies all threads blocked in atomic_flag_wait (function) |
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