release/src/router/mysql/storage/ndb/include/kernel/signaldata/DictLock.hpp

   1 /* Copyright (c) 2003, 2006 MySQL AB
   2
   3    This program is free software; you can redistribute it and/or modify
   4    it under the terms of the GNU General Public License as published by
   5    the Free Software Foundation; version 2 of the License.
   6
   7    This program is distributed in the hope that it will be useful,
   8    but WITHOUT ANY WARRANTY; without even the implied warranty of
   9    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10    GNU General Public License for more details.
  11
  12    You should have received a copy of the GNU General Public License
  13    along with this program; if not, write to the Free Software
  14    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA */
  15
  16 #ifndef DICT_LOCK_HPP
  17 #define DICT_LOCK_HPP
  18
  19 #include "SignalData.hpp"
  20
  21 // see comments in Dbdict.hpp
  22
  23 class DictLockReq {
  24   friend class Dbdict;
  25   friend class Dbdih;
  26 public:
  27   STATIC_CONST( SignalLength = 3 );
  28   enum LockType {
  29     NoLock = 0,
  30     NodeRestartLock = 1
  31   };
  32 private:
  33   Uint32 userPtr;
  34   Uint32 lockType;
  35   Uint32 userRef;
  36 };
  37
  38 class DictLockConf {
  39   friend class Dbdict;
  40   friend class Dbdih;
  41 public:
  42   STATIC_CONST( SignalLength = 3 );
  43 private:
  44   Uint32 userPtr;
  45   Uint32 lockType;
  46   Uint32 lockPtr;
  47 };
  48
  49 class DictLockRef {
  50   friend class Dbdict;
  51   friend class Dbdih;
  52 public:
  53   STATIC_CONST( SignalLength = 3 );
  54   enum ErrorCode {
  55     NotMaster = 1,
  56     InvalidLockType = 2,
  57     BadUserRef = 3,
  58     TooLate = 4,
  59     TooManyRequests = 5
  60   };
  61 private:
  62   Uint32 userPtr;
  63   Uint32 lockType;
  64   Uint32 errorCode;
  65 };
  66
  67 class DictUnlockOrd {
  68   friend class Dbdict;
  69   friend class Dbdih;
  70 public:
  71   STATIC_CONST( SignalLength = 2 );
  72 private:
  73   Uint32 lockPtr;
  74   Uint32 lockType;
  75 };
  76
  77 #endif