NAME¶

std::atomic_flag_notify_all - std::atomic_flag_notify_all

Synopsis¶

Defined in header <atomic>
void atomic_flag_notify_all( std::atomic_flag* object ) noexcept;
void atomic_flag_notify_all( volatile std::atomic_flag* object ) (since C++20)
noexcept;

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().

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¶

notify_one notifies at least one thread waiting on the atomic object
(C++20) (public member function of std::atomic_flag)
notify_all notifies all threads blocked waiting on the atomic object
(C++20) (public member function of std::atomic_flag)
atomic_flag_wait
atomic_flag_wait_explicit blocks the thread until notified and the flag changes
(C++20) (function)
(C++20)
atomic_flag_notify_one notifies a thread blocked in atomic_flag_wait
(C++20) (function)