agiardullo fe93bf9b5d Transaction::UndoGetForUpdate ... Summary: MyRocks wants to be able to un-lock a key that was just locked by GetForUpdate(). To do this safely, I am now keeping track of the number of reads(for update) and writes for each key in a transaction. UndoGetForUpdate() will only unlock a key if it hasn't been written and the read count reaches 0. Test Plan: more unit tests Reviewers: igor, rven, yhchiang, spetrunia, sdong Reviewed By: spetrunia, sdong Subscribers: spetrunia, dhruba, leveldb Differential Revision: https://reviews.facebook.net/D47043		2016-02-09 10:46:11 -08:00
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rocksdb	Transaction::UndoGetForUpdate	2016-02-09 10:46:11 -08:00