std::atomic<T>::fetch_or

		(C++11 起) (仅为 `atomic<Integral>` 模板特化的成员)
T fetch_or( T arg, std::memory_order order = std::memory_order_seq_cst ) noexcept;
T fetch_or( T arg, std::memory_order order = std::memory_order_seq_cst ) volatile noexcept;

原子地以值和 arg 逐位或的结果替换当前值。运算为读修改写操作。按照 order 的值影响内存。

若 std::atomic<T>::is_always_lock_free 为 false 则 volatile 限定版本被弃用。

(C++20 起)

arg	-	逐位或的另一参数
order	-	强制的内存顺序制约

*this 的修改顺序中立即前趋此函数效果的值。

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

将原子对象替换为与非原子实参逻辑或的结果，并获得原子对象的先前值
(函数模板)

类
atomic (C++11)
atomic_ref (C++20)
函数
atomic_storeatomic_store_explicit (C++11)(C++11)
atomic_loadatomic_load_explicit (C++11)(C++11)
atomic_exchangeatomic_exchange_explicit (C++11)(C++11)
atomic_compare_exchange_weakatomic_compare_exchange_weak_explicitatomic_compare_exchange_strongatomic_compare_exchange_strong_explicit (C++11)(C++11)(C++11)(C++11)
atomic_fetch_addatomic_fetch_add_explicit (C++11)(C++11)
atomic_fetch_subatomic_fetch_sub_explicit (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_is_lock_free (C++11)
atomic_waitatomic_wait_explicit (C++20)(C++20)
atomic_notify_one (C++20)
atomic_notify_all (C++20)
原子标志
atomic_flag (C++11)
atomic_flag_test_and_setatomic_flag_test_and_set_explicit (C++11)(C++11)
atomic_flag_clearatomic_flag_clear_explicit (C++11)(C++11)
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)
初始化
atomic_init (C++11)(C++20 中弃用)
ATOMIC_VAR_INIT (C++11)(C++20 中弃用)
ATOMIC_FLAG_INIT (C++11)(C++20 中弃用)
内存顺序
memory_order (C++11)
kill_dependency (C++11)
atomic_thread_fence (C++11)
atomic_signal_fence (C++11)

成员函数
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 (C++20)
atomic::notify_one (C++20)
atomic::notify_all (C++20)
常量
atomic::is_always_lock_free (C++17)
特化的成员函数
atomic::fetch_add
atomic::fetch_sub
atomic::fetch_and
atomic::fetch_or
atomic::fetch_xor
atomic::operator++atomic::operator++(int)atomic::operator--atomic::operator--(int)
atomic::operator+=atomic::operator-=atomic::operator&=atomic::operator\|=atomic::operator^=

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