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/* Copyright (c) 2003, 2005, 2006 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; version 2 of the License.
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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 Dbacc;
friend class Dbtup;
friend class Dbtux;
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
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