您最多选择25个主题
主题必须以字母或数字开头，可以包含连字符 (-)，并且长度不得超过35个字符
35 行
857 B
35 行
857 B
// 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.
|
|
|
|
#ifndef STORAGE_LEVELDB_DB_LOG_FORMAT_H_
|
|
#define STORAGE_LEVELDB_DB_LOG_FORMAT_H_
|
|
|
|
namespace leveldb {
|
|
namespace log {
|
|
|
|
enum RecordType {
|
|
// Zero is reserved for preallocated files
|
|
kZeroType = 0,
|
|
|
|
kFullType = 1,
|
|
|
|
// For fragments
|
|
kFirstType = 2,
|
|
kMiddleType = 3,
|
|
kLastType = 4
|
|
};
|
|
static const int kMaxRecordType = kLastType;
|
|
|
|
static const int kBlockSize = 32768;
|
|
|
|
// Header is checksum (4 bytes), type (1 byte), length (2 bytes).
|
|
static const int kHeaderSize = 4 + 1 + 2;
|
|
|
|
}
|
|
}
|
|
|
|
#endif // STORAGE_LEVELDB_DB_LOG_FORMAT_H_
|