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std::atomic_ref<T>:: notify_all

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

执行原子通知操作。

解除所有在 * ptr 上因原子等待操作（即 wait() ）而阻塞的线程（如果存在）；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

这种形式的变更检测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 应用于 发布时的行为 正确行为
LWG 3508
( P3323R1 ) 		C++20 notify_all 对于 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 的线程
(函数模板)