fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
48 lines
1.4 KiB
48 lines
1.4 KiB
// 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.
|
|
//
|
|
// Log format information shared by reader and writer.
|
|
// See ../doc/log_format.txt for more detail.
|
|
|
|
#pragma once
|
|
|
|
#include "rocksdb/rocksdb_namespace.h"
|
|
|
|
namespace ROCKSDB_NAMESPACE {
|
|
namespace log {
|
|
|
|
enum RecordType {
|
|
// Zero is reserved for preallocated files
|
|
kZeroType = 0,
|
|
kFullType = 1,
|
|
|
|
// For fragments
|
|
kFirstType = 2,
|
|
kMiddleType = 3,
|
|
kLastType = 4,
|
|
|
|
// For recycled log files
|
|
kRecyclableFullType = 5,
|
|
kRecyclableFirstType = 6,
|
|
kRecyclableMiddleType = 7,
|
|
kRecyclableLastType = 8,
|
|
};
|
|
static const int kMaxRecordType = kRecyclableLastType;
|
|
|
|
static const unsigned int kBlockSize = 32768;
|
|
|
|
// Header is checksum (4 bytes), length (2 bytes), type (1 byte)
|
|
static const int kHeaderSize = 4 + 2 + 1;
|
|
|
|
// Recyclable header is checksum (4 bytes), length (2 bytes), type (1 byte),
|
|
// log number (4 bytes).
|
|
static const int kRecyclableHeaderSize = 4 + 2 + 1 + 4;
|
|
|
|
} // namespace log
|
|
} // namespace ROCKSDB_NAMESPACE
|
|
|