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Diffstat (limited to 'src/rocksdb/file/readahead_raf.h')
-rw-r--r-- | src/rocksdb/file/readahead_raf.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/src/rocksdb/file/readahead_raf.h b/src/rocksdb/file/readahead_raf.h new file mode 100644 index 000000000..cbdcb124f --- /dev/null +++ b/src/rocksdb/file/readahead_raf.h @@ -0,0 +1,27 @@ +// 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 <atomic> +#include "rocksdb/env.h" + +namespace ROCKSDB_NAMESPACE { +// 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<RandomAccessFile> NewReadaheadRandomAccessFile( + std::unique_ptr<RandomAccessFile>&& file, size_t readahead_size); +} // namespace ROCKSDB_NAMESPACE |