|author||徐志强 <firstname.lastname@example.org>||Tue Mar 17 01:21:48 2020 +0000|
|committer||Bryan C. Mills <email@example.com>||Tue Mar 17 01:50:54 2020 +0000|
semaphore: unblock waiters when the front waiter cancels When `Release`, if the remaining tokens are not enough for the front waiter, no waiters will be notified. So if the canceled waiter is the front one, it should try to notify following waiters if there are remaining tokens. I found this bug when implementing a cancelable rwmutex based on semaphore: https://github.com/zhiqiangxu/util/blob/master/mutex/crwmutex.go This bug can be verified by this test: https://github.com/zhiqiangxu/util/blob/master/mutex/crwmutex_test.go#L43 Change-Id: Id8564976bd375a82c4fbc6cb08b0bb83118a346c GitHub-Last-Rev: 29b6ff26bf779d23239cfe64a395378a9e41d1fc GitHub-Pull-Request: golang/sync#10 Reviewed-on: https://go-review.googlesource.com/c/sync/+/223418 Run-TryBot: Bryan C. Mills <firstname.lastname@example.org> TryBot-Result: Gobot Gobot <email@example.com> Reviewed-by: Bryan C. Mills <firstname.lastname@example.org>
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