BiteTheDDDDt commented on code in PR #23237:
URL: https://github.com/apache/doris/pull/23237#discussion_r1300827146
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be/src/util/blocking_priority_queue.hpp:
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@@ -154,14 +157,15 @@ class BlockingPriorityQueue {
}
_queue.push(val);
+ unique_lock.unlock();
Review Comment:
putting the notify_one before unlock:
notifying thread: notify -> eventually release lock
notified thread: awaken -> attempt to acquire lock and fail -> block until
lock available -> acquire lock after
notifying thread releases it
putting the notify_one after unlock:
notifying thread: notify
notified thread: awaken -> attempt to acquire lock and succeed
https://stackoverflow.com/questions/55154462/c-condition-variable-notify-one-before-or-after-release-lock
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