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// 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 <cstddef>
#include <cstdint>
#include "rocksdb/rocksdb_namespace.h"
namespace ROCKSDB_NAMESPACE {
// struct ReadaheadFileInfo contains readahead information that is passed from
// one file to another file per level during iterations. This information helps
// iterators to carry forward the internal automatic prefetching readahead value
// to next file during sequential reads instead of starting from the scratch.
struct ReadaheadFileInfo {
struct ReadaheadInfo {
size_t readahead_size = 0;
int64_t num_file_reads = 0;
};
// Used by Data block iterators to update readahead info.
ReadaheadInfo data_block_readahead_info;
// Used by Index block iterators to update readahead info.
ReadaheadInfo index_block_readahead_info;
};
} // namespace ROCKSDB_NAMESPACE
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