AccScan.hpp
上传用户:romrleung
上传日期:2022-05-23
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文件大小:4k
- /* 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 getKeyinfoFlag(const Uint32 & requestInfo);
- static Uint32 getReadCommittedFlag(const Uint32 & requestInfo);
-
- static void setLockMode(Uint32 & requestInfo, Uint32 lockMode);
- static void setKeyinfoFlag(Uint32 & requestInfo, Uint32 keyinfo);
- static void setReadCommittedFlag(Uint32 & requestInfo, Uint32 readCommitted);
- };
- /**
- * Request Info
- *
- * l = Lock Mode - 1 Bit 2
- * k = Keyinfo - 1 Bit 4
- * h = Read Committed - 1 Bit 5
- *
- * 1111111111222222222233
- * 01234567890123456789012345678901
- * l kh
- */
- #define AS_LOCK_MODE_SHIFT (2)
- #define AS_LOCK_MODE_MASK (1)
- #define AS_KEYINFO_SHIFT (4)
- #define AS_READ_COMMITTED_SHIFT (5)
- inline
- Uint32
- AccScanReq::getLockMode(const Uint32 & requestInfo){
- return (requestInfo >> AS_LOCK_MODE_SHIFT) & AS_LOCK_MODE_MASK;
- }
- inline
- Uint32
- AccScanReq::getKeyinfoFlag(const Uint32 & requestInfo){
- return (requestInfo >> AS_KEYINFO_SHIFT) & 1;
- }
- inline
- Uint32
- AccScanReq::getReadCommittedFlag(const Uint32 & requestInfo){
- return (requestInfo >> AS_READ_COMMITTED_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::setKeyinfoFlag(UintR & requestInfo, UintR val){
- ASSERT_BOOL(val, "AccScanReq::setKeyinfoFlag");
- requestInfo |= (val << AS_KEYINFO_SHIFT);
- }
- inline
- void
- AccScanReq::setReadCommittedFlag(UintR & requestInfo, UintR val){
- ASSERT_BOOL(val, "AccScanReq::setReadCommittedFlag");
- requestInfo |= (val << AS_READ_COMMITTED_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