Yi Wu 1fe7db5fb8 StackableDB optionally take shared ownership of the underlying DB ...

Summary:
Allow StackableDB optionally takes a shared_ptr on construction and thus hold shared ownership of the underlying DB.
Closes https://github.com/facebook/rocksdb/pull/3423

Differential Revision: D6824163

Pulled By: yiwu-arbug

fbshipit-source-id: dbdc30c42e007533a987ef413785e192340f03eb

2018-01-31 11:07:20 -08:00

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rocksdb

StackableDB optionally take shared ownership of the underlying DB

2018-01-31 11:07:20 -08:00