Condition variable and threads 条件变量与线程
The Multi-work Condition Declivitous Impact Testing System was introduced which has variable impacting angle, rigidity, and length of stroke.
论述了多工况倾斜冲击试验系统，该系统具有可变的冲击角度，刚度和行程长度。
Next, the reader thread needs to ensure (and this is the second check you perform) that it does not wait on the condition variable any more than the specified timeout period.
接下来，读线程需要确保(这是第二个检查)它等待条件变量的时间不超过指定的超时时间。
Therefore, at the end of it all, you now have two reader threads, both waiting on the condition variable, and the mutex is unlocked.
因此，最后两个读线程都等待条件变量，互斥锁没有被锁住。
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