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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_SCAN_HPP
#define ACC_SCAN_HPP
#include "SignalData.hpp"
/*
* Used by ACC and TUX scan.
*/
class AccScanReq {
/**
* Sender(s)
*/
friend class Dblqh;
/**
* Reciver(s)
*/
friend class Dbacc;
friend class Dbtux;
public:
STATIC_CONST( SignalLength = 8 );
private:
Uint32 senderData;
Uint32 senderRef;
Uint32 tableId;
Uint32 fragmentNo;
Uint32 requestInfo;
Uint32 transId1;
Uint32 transId2;
Uint32 savePointId;
/**
* Previously there where also a scan type
*/
static Uint32 getLockMode(const Uint32 & requestInfo);
static Uint32 getReadCommittedFlag(const Uint32 & requestInfo);
static Uint32 getDescendingFlag(const Uint32 & requestInfo);
static void setLockMode(Uint32 & requestInfo, Uint32 lockMode);
static void setReadCommittedFlag(Uint32 & requestInfo, Uint32 readCommitted);
static void setDescendingFlag(Uint32 & requestInfo, Uint32 descending);
};
/**
* Request Info
*
* l = Lock Mode - 1 Bit 2
* h = Read Committed - 1 Bit 5
* z = Descending (TUX) - 1 Bit 6
*
* 1111111111222222222233
* 01234567890123456789012345678901
* l hz
*/
#define AS_LOCK_MODE_SHIFT (2)
#define AS_LOCK_MODE_MASK (1)
#define AS_READ_COMMITTED_SHIFT (5)
#define AS_DESCENDING_SHIFT (6)
inline
Uint32
AccScanReq::getLockMode(const Uint32 & requestInfo){
return (requestInfo >> AS_LOCK_MODE_SHIFT) & AS_LOCK_MODE_MASK;
}
inline
Uint32
AccScanReq::getReadCommittedFlag(const Uint32 & requestInfo){
return (requestInfo >> AS_READ_COMMITTED_SHIFT) & 1;
}
inline
Uint32
AccScanReq::getDescendingFlag(const Uint32 & requestInfo){
return (requestInfo >> AS_DESCENDING_SHIFT) & 1;
}
inline
void
AccScanReq::setLockMode(UintR & requestInfo, UintR val){
ASSERT_MAX(val, AS_LOCK_MODE_MASK, "AccScanReq::setLockMode");
requestInfo |= (val << AS_LOCK_MODE_SHIFT);
}
inline
void
AccScanReq::setReadCommittedFlag(UintR & requestInfo, UintR val){
ASSERT_BOOL(val, "AccScanReq::setReadCommittedFlag");
requestInfo |= (val << AS_READ_COMMITTED_SHIFT);
}
inline
void
AccScanReq::setDescendingFlag(UintR & requestInfo, UintR val){
ASSERT_BOOL(val, "AccScanReq::setDescendingFlag");
requestInfo |= (val << AS_DESCENDING_SHIFT);
}
class AccScanConf {
/**
* Sender(s)
*/
friend class Dbacc;
friend class Dbtux;
/**
* Reciver(s)
*/
friend class Dblqh;
enum {
ZEMPTY_FRAGMENT = 0,
ZNOT_EMPTY_FRAGMENT = 1
};
public:
STATIC_CONST( SignalLength = 8 );
private:
Uint32 scanPtr;
Uint32 accPtr;
Uint32 unused1;
Uint32 unused2;
Uint32 unused3;
Uint32 unused4;
Uint32 unused5;
Uint32 flag;
};
class AccCheckScan {
friend class Dbacc;
friend class Dbtux;
friend class Dblqh;
enum {
ZCHECK_LCP_STOP = 0,
ZNOT_CHECK_LCP_STOP = 1
};
public:
STATIC_CONST( SignalLength = 2 );
private:
Uint32 accPtr; // scanptr.i in ACC or TUX
Uint32 checkLcpStop; // from enum
};
#endif
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