chromium/third_party/leveldatabase/src/include/leveldb/comparator.h

// 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.

#ifndef STORAGE_LEVELDB_INCLUDE_COMPARATOR_H_
#define STORAGE_LEVELDB_INCLUDE_COMPARATOR_H_

#include <string>

#include "leveldb/export.h"

namespace leveldb {

class Slice;

// A Comparator object provides a total order across slices that are
// used as keys in an sstable or a database.  A Comparator implementation
// must be thread-safe since leveldb may invoke its methods concurrently
// from multiple threads.
class LEVELDB_EXPORT Comparator { … };

// Return a builtin comparator that uses lexicographic byte-wise
// ordering.  The result remains the property of this module and
// must not be deleted.
LEVELDB_EXPORT const Comparator* BytewiseComparator();

}  // namespace leveldb

#endif  // STORAGE_LEVELDB_INCLUDE_COMPARATOR_H_