ceph/src/rocksdb/include/rocksdb/types.h

   1 // Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
   2 //  This source code is licensed under both the GPLv2 (found in the
   3 //  COPYING file in the root directory) and Apache 2.0 License
   4 //  (found in the LICENSE.Apache file in the root directory).
   5
   6 #pragma once
   7
   8 #include <stdint.h>
   9
  10 #include "rocksdb/slice.h"
  11
  12 namespace ROCKSDB_NAMESPACE {
  13
  14 // Define all public custom types here.
  15
  16 using ColumnFamilyId = uint32_t;
  17
  18 // Represents a sequence number in a WAL file.
  19 using SequenceNumber = uint64_t;
  20
  21 const SequenceNumber kMinUnCommittedSeq = 1;  // 0 is always committed
  22
  23 enum class TableFileCreationReason {
  24   kFlush,
  25   kCompaction,
  26   kRecovery,
  27   kMisc,
  28 };
  29
  30 enum class BlobFileCreationReason {
  31   kFlush,
  32   kCompaction,
  33   kRecovery,
  34 };
  35
  36 // The types of files RocksDB uses in a DB directory. (Available for
  37 // advanced options.)
  38 enum FileType {
  39   kWalFile,
  40   kDBLockFile,
  41   kTableFile,
  42   kDescriptorFile,
  43   kCurrentFile,
  44   kTempFile,
  45   kInfoLogFile,  // Either the current one, or an old one
  46   kMetaDatabase,
  47   kIdentityFile,
  48   kOptionsFile,
  49   kBlobFile
  50 };
  51
  52 // User-oriented representation of internal key types.
  53 // Ordering of this enum entries should not change.
  54 enum EntryType {
  55   kEntryPut,
  56   kEntryDelete,
  57   kEntrySingleDelete,
  58   kEntryMerge,
  59   kEntryRangeDeletion,
  60   kEntryBlobIndex,
  61   kEntryDeleteWithTimestamp,
  62   kEntryWideColumnEntity,
  63   kEntryOther,
  64 };
  65
  66 }  // namespace ROCKSDB_NAMESPACE