fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph

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Levi Tamasi 6301dbe7a7 Use function objects as deleters in the block cache (#6545) ... Summary: As the first step of reintroducing eviction statistics for the block cache, the patch switches from using simple function pointers as deleters to function objects implementing an interface. This will enable using deleters that have state, like a smart pointer to the statistics object that is to be updated when an entry is removed from the cache. For now, the patch adds a deleter template class `SimpleDeleter`, which simply casts the `value` pointer to its original type and calls `delete` or `delete[]` on it as appropriate. Note: to prevent object lifecycle issues, deleters must outlive the cache entries referring to them; `SimpleDeleter` ensures this by using the ("leaky") Meyers singleton pattern. Pull Request resolved: https://github.com/facebook/rocksdb/pull/6545 Test Plan: `make asan_check` Reviewed By: siying Differential Revision: D20475823 Pulled By: ltamasi fbshipit-source-id: fe354c33dd96d9bafc094605462352305449a22a		5 years ago
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rocksdb	Use function objects as deleters in the block cache (#6545)	5 years ago