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92 linhas
3.3 KiB
92 linhas
3.3 KiB
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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//
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// File names used by DB code
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#ifndef STORAGE_LEVELDB_DB_FILENAME_H_
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#define STORAGE_LEVELDB_DB_FILENAME_H_
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#include <stdint.h>
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#include <string>
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#include "include/slice.h"
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#include "include/status.h"
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#include "port/port.h"
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namespace leveldb {
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class Env;
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struct LargeValueRef;
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enum FileType {
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kLogFile,
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kDBLockFile,
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kTableFile,
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kLargeValueFile,
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kDescriptorFile,
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kCurrentFile,
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kTempFile,
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kInfoLogFile, // Either the current one, or an old one
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};
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// Return the name of the log file with the specified number
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// in the db named by "dbname". The result will be prefixed with
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// "dbname".
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extern std::string LogFileName(const std::string& dbname, uint64_t number);
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// Return the name of the sstable with the specified number
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// in the db named by "dbname". The result will be prefixed with
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// "dbname".
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extern std::string TableFileName(const std::string& dbname, uint64_t number);
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// Return the name of the large value file with the specified large
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// value reference in the db named by "dbname". The result will be
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// prefixed with "dbname".
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extern std::string LargeValueFileName(const std::string& dbname,
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const LargeValueRef& large_ref);
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// Return the name of the descriptor file for the db named by
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// "dbname" and the specified incarnation number. The result will be
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// prefixed with "dbname".
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extern std::string DescriptorFileName(const std::string& dbname,
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uint64_t number);
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// Return the name of the current file. This file contains the name
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// of the current manifest file. The result will be prefixed with
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// "dbname".
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extern std::string CurrentFileName(const std::string& dbname);
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// Return the name of the lock file for the db named by
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// "dbname". The result will be prefixed with "dbname".
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extern std::string LockFileName(const std::string& dbname);
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// Return the name of a temporary file owned by the db named "dbname".
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// The result will be prefixed with "dbname".
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extern std::string TempFileName(const std::string& dbname, uint64_t number);
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// Return the name of the info log file for "dbname".
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extern std::string InfoLogFileName(const std::string& dbname);
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// Return the name of the old info log file for "dbname".
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extern std::string OldInfoLogFileName(const std::string& dbname);
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// If filename is a leveldb file, store the type of the file in *type.
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// If *type is kLargeValueFile, then the large value reference data
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// from the filename is stored in "*large_ref. For all other types of
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// files, the number encoded in the filename is stored in *number. If
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// the filename was successfully parsed, returns true. Else return
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// false.
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extern bool ParseFileName(const std::string& filename,
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uint64_t* number,
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LargeValueRef* large_ref,
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FileType* type);
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// Make the CURRENT file point to the descriptor file with the
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// specified number.
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extern Status SetCurrentFile(Env* env, const std::string& dbname,
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uint64_t descriptor_number);
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}
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#endif // STORAGE_LEVELDB_DB_FILENAME_H_
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