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std:: future_status

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定义于头文件 <future>
enum class future_status {

ready,
timeout,
deferred

} ;
(C++11 起)

指定由 std::future 和 std::shared_future 的 wait_for 与 wait_until 函数返回的future状态。

常量

枚举项 含义
deferred 共享状态包含延迟函数，结果仅在显式请求时计算
ready 共享状态已就绪
timeout 在指定超时持续时间结束前共享状态未就绪

参见

等待结果，若在指定的超时时间内结果不可用则返回
( std::future<T> 的公开成员函数)
等待结果，若在指定的超时时间内结果不可用则返回
( std::shared_future<T> 的公开成员函数)
等待结果，若在到达指定时间点时结果仍不可用则返回
( std::future<T> 的公开成员函数)
等待结果，若在到达指定时间点时结果仍不可用则返回
( std::shared_future<T> 的公开成员函数)