hairet commented on issue #688: bthread_cond_signal中的一点疑问 URL: https://github.com/apache/incubator-brpc/issues/688#issuecomment-531625400 bthread_cond_wait里面会判断ic->seq,即如果ic->seq被fetch_add了，则存在一个可能性是wait的bthread在butex_wait里面还未进入代码阻塞（pthread的butex_wait_from_pthread或者bthread的sched），已经因为expected_value被改变而直接退出bthread_cond_wait。
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