Fri, 25 Jan 2019 00:27:51 -0500 8216258: Make FreeIdSet semaphore-based
kbarrett [Fri, 25 Jan 2019 00:27:51 -0500] rev 53482
8216258: Make FreeIdSet semaphore-based Summary: Use semaphore-based blocking and notifying, instead of Mutex. Reviewed-by: tschatzl, sangheki
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