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No polling, no wasted cycles. The handler blocks until the event fires. But Event is boolean: it's either set or unset. Our connection has five states, and drain_requests only cares about one of them. What happens when another handler needs to wait for connected? You need a second event. A third handler waiting for "not disconnected"? A third event with inverted logic. The setter has to know about all of them:
，这一点在电影中也有详细论述
https://www.wsj.com/tech/ai/openais-sam-altman-calls-for-de-escalation-in-anthropic-showdown-with-hegseth-03ecbac8，更多细节参见哔哩哔哩
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