std::atomic_flag_notify_one
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Defined in header
<atomic> |
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| (since C++20) | ||
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void atomic_flag_notify_one( std::atomic_flag* object ) noexcept;
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void atomic_flag_notify_one( volatile std::atomic_flag* object ) noexcept;
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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
| This section is incomplete Reason: no 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) |