AccLock.hpp
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上传日期:2022-05-23
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- /* Copyright (C) 2003 MySQL AB
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
- #ifndef ACC_LOCK_HPP
- #define ACC_LOCK_HPP
- #include "SignalData.hpp"
- /*
- * Lock or unlock tuple. If lock request is queued, the reply is later
- * via ACCKEYCONF.
- */
- class AccLockReq {
- friend class Dbtux;
- friend class Dbacc;
- friend bool printACC_LOCKREQ(FILE *, const Uint32*, Uint32, Uint16);
- public:
- enum RequestType { // first byte
- LockShared = 1,
- LockExclusive = 2,
- Unlock = 3,
- Abort = 4,
- AbortWithConf = 5
- };
- enum RequestFlag { // second byte
- };
- enum ReturnCode {
- Success = 0,
- IsBlocked = 1, // was put in lock queue
- WouldBlock = 2, // if we add non-blocking option
- Refused = 3,
- NoFreeOp = 4
- };
- STATIC_CONST( LockSignalLength = 12 );
- STATIC_CONST( UndoSignalLength = 3 );
- private:
- Uint32 returnCode;
- Uint32 requestInfo;
- Uint32 accOpPtr;
- // rest only if lock request
- Uint32 userPtr;
- Uint32 userRef;
- Uint32 tableId;
- Uint32 fragId;
- Uint32 fragPtrI;
- Uint32 hashValue;
- Uint32 tupAddr;
- Uint32 transId1;
- Uint32 transId2;
- };
- #endif