Adding upstream version 18.2.2.upstream/18.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 42 insertions, 0 deletions

diff --git a/src/rocksdb/table/block_based/parsed_full_filter_block.h b/src/rocksdb/table/block_based/parsed_full_filter_block.h
new file mode 100644
index 000000000..95d7b5208
--- /dev/null
+++ b/src/rocksdb/table/block_based/parsed_full_filter_block.h
@@ -0,0 +1,42 @@
+//  Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
+//  This source code is licensed under both the GPLv2 (found in the
+//  COPYING file in the root directory) and Apache 2.0 License
+//  (found in the LICENSE.Apache file in the root directory).
+
+#pragma once
+
+#include <memory>
+
+#include "table/format.h"
+
+namespace ROCKSDB_NAMESPACE {
+
+class FilterBitsReader;
+class FilterPolicy;
+
+// The sharable/cachable part of the full filter.
+class ParsedFullFilterBlock {
+ public:
+  ParsedFullFilterBlock(const FilterPolicy* filter_policy,
+                        BlockContents&& contents);
+  ~ParsedFullFilterBlock();
+
+  FilterBitsReader* filter_bits_reader() const {
+    return filter_bits_reader_.get();
+  }
+
+  // TODO: consider memory usage of the FilterBitsReader
+  size_t ApproximateMemoryUsage() const {
+    return block_contents_.ApproximateMemoryUsage();
+  }
+
+  bool own_bytes() const { return block_contents_.own_bytes(); }
+
+  const Slice GetBlockContentsData() const { return block_contents_.data; }
+
+ private:
+  BlockContents block_contents_;
+  std::unique_ptr<FilterBitsReader> filter_bits_reader_;
+};
+
+}  // namespace ROCKSDB_NAMESPACE