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std::atomic_ref<T>:: notify_one

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atomic_ref::notify_one
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Constants
void notify_one ( ) const noexcept ;
(自 C++26 起为 constexpr)

执行原子通知操作。

如果在原子等待操作（即 wait() ）中有线程被阻塞于 * ptr ，则解除 至少一个 此类线程的阻塞；否则不执行任何操作。 此重载仅当 std:: is_const_v < T > 为 false 时参与重载决议。

目录

注释

这种变更检测形式通常比简单轮询或纯自旋锁更高效。

示例

本节内容不完整
原因：缺少示例

缺陷报告

下列行为变更缺陷报告被追溯应用于先前发布的C++标准。

缺陷报告 适用范围 发布时行为 正确行为
LWG 3508
( P3323R1 ) 		C++20 notify_one 对 const T 无意义 约束为仅接受非 const T

参见

阻塞线程直至被通知且原子值发生变化
(公开成员函数)
(C++20) (C++20)
阻塞线程直至被通知且原子值发生变化
(函数模板)
(C++20)
通知阻塞在 atomic_wait 中的线程
(函数模板)