Nathan VanBenschoten 37cd617b6b Add virtual Truncate method to Env ... Summary: This change adds a virtual `Truncate` method to `Env`, which truncates the named file to the specified size. At the moment, this is only supported for `MockEnv`, but other `Env's` could be extended to override the method too. This is the same approach that methods like `LinkFile` and `AreSameFile` have taken. This is useful for any user of the in-memory `Env`. The implementation's header is not exported, so before this change, it was impossible to access it's already existing `Truncate` method. Closes https://github.com/facebook/rocksdb/pull/3779 Differential Revision: D7785789 Pulled By: ajkr fbshipit-source-id: 3bcdaeea7b7180529f7d9b496dc67b791a00bbf0		2018-04-26 21:12:51 -07:00
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rocksdb	Add virtual Truncate method to Env	2018-04-26 21:12:51 -07:00