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std::barrier<CompletionFunction>:: arrive_and_wait

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std::barrier
void arrive_and_wait ( ) ;
(自 C++20 起)

原子地将期望计数减1，随后在当前阶段的同步点阻塞，直到运行当前阶段的完成步骤。等价于 wait ( arrive ( ) ) ; 。

如果当前阶段的期望计数为零，则行为未定义。

目录

参数

(无)

返回值

(无)

异常

在出错时抛出 std::system_error ，附带适用于互斥类型的错误码。

注释

如果在此函数调用期间当前期望计数递减至零，将执行阶段完成步骤且此函数不会阻塞。

如果在调用此函数前当前期望计数为零，则所有后续阶段的初始期望计数也为零，这意味着 barrier 无法被重复使用。

示例

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原因：缺少示例