JimChengLin commented on PR #2907:
URL: https://github.com/apache/brpc/pull/2907#issuecomment-3092409124
> @JimChengLin 我觉得这里还是有问题：当前只有一个worker
wait的同时，non-worker起了一个任务，选中了该worker，signal时没同步到waiter num，也会出现信号丢失，task
永远不会被消。类似[#2916
(comment)](https://github.com/apache/brpc/pull/2916#issuecomment-2728608117)
你说的 case #2916 是不是解决了呀。就是 waiter num = 0，只表示当前肯定没有，但是return 的瞬间，如果有新 worker
进来 wait 就 signal lost 了。解决方案是 signal 的时候，无论 waiter num 都变更 butex flag，这样 worker
就有一个double check pattern。
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