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futex的wait和wake过程,看起来和javaReentrantLock工作方式如出一辙,既然底层有了这样的实现了。jdk为什么还要再写一遍相同的过程,而且ReentrantLock在park和unpark的时候还会调用pthread中的pthread_cond_timewait最终还是通过futex系统调用。

So now is 2022, we still don't have a table component.