std::atomic_ref<T>::notify_one

 

C++

语言

标准库头文件

自立与有宿主实现

具名要求

语言支持库

概念库 (C++20)

诊断库

工具库

字符串库

容器库

迭代器库

范围库 (C++20)

算法库

数值库

本地化库

输入/输出库

文件系统库 (C++17)

正则表达式库 (C++11)

原子操作库 (C++11)

线程支持库 (C++11)

技术规范

 

原子操作库

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)

 

std::atomic_ref

成员函数

atomic_ref::atomic_ref

atomic_ref::operator=

atomic_ref::is_lock_free

atomic_ref::store

atomic_ref::load

atomic_ref::operator T

atomic_ref::exchange

atomic_ref::compare_exchange_strongatomic_ref::compare_exchange_weak

atomic_ref::wait

atomic_ref::notify_one

atomic_ref::notify_all

常量

atomic_ref::is_always_lock_free

atomic_ref::required_alignment

特化的成员函数

atomic_ref::fetch_add

atomic_ref::fetch_sub

atomic_ref::fetch_and

atomic_ref::fetch_or

atomic_ref::fetch_xor

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

atomic_ref::operator+=atomic_ref::operator-=atomic_ref::operator&=atomic_ref::operator|=atomic_ref::operator^=

 

		(C++20 起)
void notify_one() const noexcept;
void notify_one() const volatile noexcept;

进行原子提醒操作。

若有线程被 *this 上的原子等待操作（即 wait() ）阻塞，则除阻至少一个这种线程；否则不做任何事。

返回值

（无）

注解

更改检测的这种形式通常比简单轮询或纯自旋锁高效。

参阅

wait (C++20)	阻塞线程直至被提醒且原子值更改 (公开成员函数)
atomic_waitatomic_wait_explicit (C++20)(C++20)	阻塞线程直至被提醒且原子值更改 (函数模板)
atomic_notify_one (C++20)	提醒一个在 atomic_wait 中阻塞的线程 (函数模板)