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std::atomic_ref<T>::notify_all

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< cpp‎ | atomic‎ | atomic ref

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hardware_destructive_interference_sizehardware_constructive_interference_size

(C++17)(C++17)

this_thread namespace

(C++11)

(C++11)

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Cooperative cancellation

(C++20)

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(C++26)

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(C++26)

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(C++11)(C++11)(C++11)(C++11)(C++11)(C++11)

Condition variables

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notify_all_at_thread_exit

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counting_semaphorebinary_semaphore

(C++20)(C++20)

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(C++20)

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future_category

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(C++11)(deprecated in C++20)

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(C++11)(deprecated in C++20)

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(C++11)

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atomic_fetch_addatomic_fetch_add_explicit

(C++11)(C++11)

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(C++11)(C++11)

atomic_fetch_andatomic_fetch_and_explicit

(C++11)(C++11)

atomic_fetch_oratomic_fetch_or_explicit

(C++11)(C++11)

atomic_fetch_xoratomic_fetch_xor_explicit

(C++11)(C++11)

atomic_fetch_maxatomic_fetch_max_explicit

(C++26)(C++26)

atomic_fetch_minatomic_fetch_min_explicit

(C++26)(C++26)

atomic_is_lock_free

(C++11)

atomic_waitatomic_wait_explicit

(C++20)(C++20)

atomic_notify_one

(C++20)

atomic_notify_all

(C++20)

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atomic_flag_test_and_setatomic_flag_test_and_set_explicit

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atomic_flag_clearatomic_flag_clear_explicit

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atomic_flag_testatomic_flag_test_explicit

(C++20)(C++20)

atomic_flag_waitatomic_flag_wait_explicit

(C++20)(C++20)

atomic_flag_notify_one

(C++20)

atomic_flag_notify_all

(C++20)

std::atomic_ref

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atomic_ref::atomic_ref

atomic_ref::operator=

atomic_ref::is_lock_free

atomic_ref::store

atomic_ref::load

atomic_ref::operator value_type

atomic_ref::exchange

atomic_ref::compare_exchange_strongatomic_ref::compare_exchange_weak

atomic_ref::wait

atomic_ref::notify_one

atomic_ref::notify_all

atomic_ref::address

(C++26)

Operations for arithmetic types
(except bool and pointer-to-object)

atomic_ref::fetch_add

atomic_ref::fetch_sub

atomic_ref::operator+=atomic_ref::operator-=

Operations for integral types
(except bool and pointer-to-object)

atomic_ref::fetch_max

(C++26)

atomic_ref::fetch_min

(C++26)

atomic_ref::operator++atomic_ref::operator++(int)atomic_ref::operator--atomic_ref::operator--(int)

Operations for integral types
(except bool)

atomic_ref::fetch_and

atomic_ref::fetch_or

atomic_ref::fetch_xor

atomic_ref::operator&=atomic_ref::operator|=atomic_ref::operator^=

atomic_ref::is_always_lock_free

atomic_ref::required_alignment

void notify_all() const noexcept;

(constexpr since C++26)

Performs atomic notifying operations.

Unblocks all threads blocked in atomic waiting operations (i.e. wait()) on *ptr , if there are any; otherwise does nothing. This overload participates in overload resolution only if std::is_const_v <T> is false.

Contents

[edit] Notes

This form of change-detection is often more efficient than simple polling or pure spinlocks.

[edit] Example

This section is incomplete
Reason: no example

Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR	Applied to	Behavior as published	Correct behavior
LWG 3508 (P3323R1)	C++20	`notify_all` was meaningless for const T	constrained to accept only non-const `T`

[edit] See also

blocks the thread until notified and the atomic value changes
(public member function) [edit]

atomic_waitatomic_wait_explicit

(C++20)(C++20)

blocks the thread until notified and the atomic value changes
(function template) [edit]

atomic_notify_one

(C++20)

notifies a thread blocked in atomic_wait
(function template) [edit]

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Todo no example