From e6918187568dbd01842d8d1d2c808ce16a894239 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 21 Apr 2024 13:54:28 +0200 Subject: Adding upstream version 18.2.2. Signed-off-by: Daniel Baumann --- src/rocksdb/file/readahead_raf.h | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 src/rocksdb/file/readahead_raf.h (limited to 'src/rocksdb/file/readahead_raf.h') diff --git a/src/rocksdb/file/readahead_raf.h b/src/rocksdb/file/readahead_raf.h new file mode 100644 index 000000000..dfaf2b4fa --- /dev/null +++ b/src/rocksdb/file/readahead_raf.h @@ -0,0 +1,29 @@ +// 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). +// +// Copyright (c) 2011 The LevelDB Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. See the AUTHORS file for names of contributors. + +#pragma once +#include + +#include "rocksdb/rocksdb_namespace.h" + +namespace ROCKSDB_NAMESPACE { +class FSRandomAccessFile; +// This file provides the following main abstractions: +// SequentialFileReader : wrapper over Env::SequentialFile +// RandomAccessFileReader : wrapper over Env::RandomAccessFile +// WritableFileWriter : wrapper over Env::WritableFile +// In addition, it also exposed NewReadaheadRandomAccessFile, NewWritableFile, +// and ReadOneLine primitives. + +// NewReadaheadRandomAccessFile provides a wrapper over RandomAccessFile to +// always prefetch additional data with every read. This is mainly used in +// Compaction Table Readers. +std::unique_ptr NewReadaheadRandomAccessFile( + std::unique_ptr&& file, size_t readahead_size); +} // namespace ROCKSDB_NAMESPACE -- cgit v1.2.3