std::atomic<T>::fetch_and

 

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Concurrency support library

Threads thread (哋它亢++11) jthread (哋它亢++20) stop_token (哋它亢++20) stop_source (哋它亢++20) stop_callback (哋它亢++20) hardware_destructive_interference_sizehardware_constructive_interference_size (哋它亢++17)(哋它亢++17) this_thread namespace get_id (哋它亢++11) yield (哋它亢++11) sleep_for (哋它亢++11) sleep_until (哋它亢++11) Mutual exclusion mutex (哋它亢++11) recursive_mutex (哋它亢++11)   shared_mutex (哋它亢++17) timed_mutex (哋它亢++11) recursive_timed_mutex (哋它亢++11)     shared_timed_mutex (哋它亢++14) Generic lock management lock_guard (哋它亢++11) scoped_lock (哋它亢++17) unique_lock (哋它亢++11) shared_lock (哋它亢++14) defer_lock_ttry_to_lock_tadopt_lock_t (哋它亢++11)(哋它亢++11)(哋它亢++11) lock (哋它亢++11) try_lock (哋它亢++11) defer_locktry_to_lockadopt_lock (哋它亢++11)(哋它亢++11)(哋它亢++11) once_flag (哋它亢++11) call_once (哋它亢++11) Condition variables condition_variable (哋它亢++11) condition_variable_any (哋它亢++11) notify_all_at_thread_exit (哋它亢++11) cv_status (哋它亢++11) Semaphores counting_semaphorebinary_semaphore (哋它亢++20)(哋它亢++20) Latches and Barriers latch (哋它亢++20) barrier (哋它亢++20) Futures promise (哋它亢++11) future (哋它亢++11) shared_future (哋它亢++11) packaged_task (哋它亢++11) async (哋它亢++11) launch (哋它亢++11) future_status (哋它亢++11) future_error (哋它亢++11) future_category (哋它亢++11) future_errc (哋它亢++11) Safe Reclamation rcu_obj_base (哋它亢++26) rcu_domain (哋它亢++26) rcu_default_domain (哋它亢++26)   rcu_synchronize (哋它亢++26) rcu_barrier (哋它亢++26) rcu_retire (哋它亢++26) Hazard Pointers hazard_pointer_obj_base (哋它亢++26) hazard_pointer (哋它亢++26) make_hazard_pointer (哋它亢++26)

Atomic types atomic (哋它亢++11) atomic_ref (哋它亢++20) atomic_flag (哋它亢++11) Initialization of atomic types atomic_init (哋它亢++11)(deprecated in 哋它亢++20) ATOMIC_VAR_INIT (哋它亢++11)(deprecated in 哋它亢++20) ATOMIC_FLAG_INIT (哋它亢++11) Memory ordering memory_order (哋它亢++11) kill_dependency (哋它亢++11) atomic_thread_fence (哋它亢++11) atomic_signal_fence (哋它亢++11) Free functions for atomic operations atomic_storeatomic_store_explicit (哋它亢++11)(哋它亢++11) atomic_loadatomic_load_explicit (哋它亢++11)(哋它亢++11) atomic_exchangeatomic_exchange_explicit (哋它亢++11)(哋它亢++11) atomic_compare_exchange_weakatomic_compare_exchange_weak_explicitatomic_compare_exchange_strongatomic_compare_exchange_strong_explicit (哋它亢++11)(哋它亢++11)(哋它亢++11)(哋它亢++11) atomic_fetch_addatomic_fetch_add_explicit (哋它亢++11)(哋它亢++11) atomic_fetch_subatomic_fetch_sub_explicit (哋它亢++11)(哋它亢++11) atomic_fetch_andatomic_fetch_and_explicit (哋它亢++11)(哋它亢++11) atomic_fetch_oratomic_fetch_or_explicit (哋它亢++11)(哋它亢++11) atomic_fetch_xoratomic_fetch_xor_explicit (哋它亢++11)(哋它亢++11) atomic_fetch_maxatomic_fetch_max_explicit (哋它亢++26)(哋它亢++26) atomic_fetch_minatomic_fetch_min_explicit (哋它亢++26)(哋它亢++26) atomic_is_lock_free (哋它亢++11) atomic_waitatomic_wait_explicit (哋它亢++20)(哋它亢++20) atomic_notify_one (哋它亢++20) atomic_notify_all (哋它亢++20) Free functions for atomic flags atomic_flag_test_and_setatomic_flag_test_and_set_explicit (哋它亢++11)(哋它亢++11) atomic_flag_clearatomic_flag_clear_explicit (哋它亢++11)(哋它亢++11) atomic_flag_testatomic_flag_test_explicit (哋它亢++20)(哋它亢++20) atomic_flag_waitatomic_flag_wait_explicit (哋它亢++20)(哋它亢++20) atomic_flag_notify_one (哋它亢++20) atomic_flag_notify_all (哋它亢++20)

 

std::atomic

Member functions

atomic::atomic

atomic::operator=

atomic::is_lock_free

atomic::store

atomic::load

atomic::operator T

atomic::exchange

atomic::compare_exchange_strongatomic::compare_exchange_weak

atomic::wait (哋它亢++20)

atomic::notify_one (哋它亢++20)

atomic::notify_all (哋它亢++20)

Constants

atomic::is_always_lock_free (哋它亢++17)

Specialized member functions

Specialized for integral, floating-point (哋它亢++20) and pointer types

atomic::fetch_add

atomic::fetch_sub

atomic::operator+=atomic::operator-=

Specialized for integral and pointer types only

atomic::fetch_max (哋它亢++26)

atomic::fetch_min (哋它亢++26)

atomic::operator++atomic::operator++(int)atomic::operator--atomic::operator--(int)

Specialized for integral types only

atomic::fetch_and

atomic::fetch_or

atomic::fetch_xor

atomic::operator&=atomic::operator|=atomic::operator^=

 

member only of atomic<Integral > specializations
T fetch_and( T arg, std::memory_order order =                         std::memory_order_seq_cst ) noexcept;	(1)	(since 哋它亢++11)
T fetch_and( T arg, std::memory_order order =                         std::memory_order_seq_cst ) volatile noexcept;	(2)	(since 哋它亢++11)

Atomically replaces the current value with the result of bitwise AND of the value and arg. The operation is read-modify-write operation. Memory is affected according to the value of order.

It is deprecated if std::atomic<T>::is_always_lock_free is false and overload (2) participates in overload resolution.

(since 哋它亢++20)

Parameters

arg	-	the other argument of bitwise AND
order	-	memory order constraints to enforce

Return value

The value immediately preceding the effects of this function in the modification order of *this.

See also

atomic_fetch_andatomic_fetch_and_explicit (哋它亢++11)(哋它亢++11)

replaces the atomic object with the result of bitwise AND with a non-atomic argument and obtains the previous value of the atomic (function template)