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

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anand76 a50da404be Fix a tsan warning due to reading flags in LRUHandle without holding a mutex (#8433) ... Summary: Tsan complains due to a perceived race condition in accessing LRUHandle flags. One thread calls ```LRUHandle::SetHit()``` from ```LRUCacheShard::Lookup()```, while another thread calls ```LRUHandle::IsPending()``` from ```LRUCacheShard::IsReady()```. The latter call is from ```MultiGet```. It doesn't actually have to call ```IsReady``` since a null value indicates the cache handle is not ready, so its sufficient to check for a null value. Also modify ```IsReady``` to acquire the LRU shard mutex. Tests: 1. make check 2. Run tsan_crash Pull Request resolved: https://github.com/facebook/rocksdb/pull/8433 Reviewed By: zhichao-cao Differential Revision: D29278030 Pulled By: anand1976 fbshipit-source-id: 0c9fed56d12eda853e72dadebe75038361bd257f		4 years ago
..
cache.cc	Refactor Option obj address from char* to void* (#8295)	4 years ago
cache_bench.cc	Allow cache_bench/db_bench to use a custom secondary cache (#8312)	4 years ago
cache_bench_tool.cc	Allow cache_bench/db_bench to use a custom secondary cache (#8312)	4 years ago
cache_entry_roles.cc	Use deleters to label cache entries and collect stats (#8297)	4 years ago
cache_entry_roles.h	Clarify some DB::Open,OpenForReadOnly semantics (#8379)	4 years ago
cache_entry_stats.h	Pin CacheEntryStatsCollector to fix performance bug (#8385)	4 years ago
cache_helpers.h	Use deleters to label cache entries and collect stats (#8297)	4 years ago
cache_test.cc	Use deleters to label cache entries and collect stats (#8297)	4 years ago
clock_cache.cc	Use deleters to label cache entries and collect stats (#8297)	4 years ago
clock_cache.h	Change RocksDB License	8 years ago
lru_cache.cc	Fix a tsan warning due to reading flags in LRUHandle without holding a mutex (#8433)	4 years ago
lru_cache.h	Parallelize secondary cache lookup in MultiGet (#8405)	4 years ago
lru_cache_test.cc	Parallelize secondary cache lookup in MultiGet (#8405)	4 years ago
sharded_cache.cc	Use deleters to label cache entries and collect stats (#8297)	4 years ago
sharded_cache.h	Parallelize secondary cache lookup in MultiGet (#8405)	4 years ago