boost :: condition_variable :: timed_wait（）返回虚假的唤醒是什么？ [英] What does boost::condition_variable::timed_wait() return on spurious wakeups?

问题描述

boost文档说：

返回：
如果调用返回，因为abs_time指定的时间是达到，否则为真。

Returns: false if the call is returning because the time specified by abs_time was reached, true otherwise.

但是如果有虚假的唤醒会返回什么？

But what is returned if there is a spurious wakeup?

推荐答案

如果条件变量可以认为它是一个虚假的唤醒，就不需要返回，会吗？

If the condition variable could figure that it is a spurious wake-up there would be no need to return, would it?

需要检查受互斥体保护的数据和条件变量是否已更改，以检测虚假唤醒。条件变量不能为你。

You need to check if the data protected by the mutex and the condition variable has changed to detect a spurious wake-up. The condition variable can not do that for you.

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