Returns: false if the call is returning because the time specified by abs_time was reached, true otherwise.
但是,如果有虚假的警示,还有哪些回来?
如果情况变数可能表明这是一次虚假的警示,就没有必要返回?
你们需要检查一下,受mut子和条件变数保护的数据是否发生了变化,以发现有预谋的警示。 条件变数对你来说是无法做到的。
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