NdbReceiver.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 NdbReceiver_H
- #define NdbReceiver_H
- #ifndef DOXYGEN_SHOULD_SKIP_INTERNAL // Not part of public interface
- #include <ndb_types.h>
- class Ndb;
- class NdbConnection;
- class NdbReceiver
- {
- friend class Ndb;
- friend class NdbOperation;
- friend class NdbScanOperation;
- friend class NdbIndexOperation;
- friend class NdbIndexScanOperation;
- friend class NdbConnection;
- public:
- enum ReceiverType { NDB_UNINITIALIZED,
- NDB_OPERATION = 1,
- NDB_SCANRECEIVER = 2,
- NDB_INDEX_OPERATION = 3
- };
-
- NdbReceiver(Ndb *aNdb);
- void init(ReceiverType type, void* owner);
- void release();
- ~NdbReceiver();
-
- Uint32 getId(){
- return m_id;
- }
- ReceiverType getType(){
- return m_type;
- }
-
- inline NdbConnection * getTransaction();
- void* getOwner(){
- return m_owner;
- }
-
- bool checkMagicNumber() const;
- inline void next(NdbReceiver* next) { m_next = next;}
- inline NdbReceiver* next() { return m_next; }
-
- void setErrorCode(int);
- private:
- Uint32 theMagicNumber;
- Ndb* m_ndb;
- Uint32 m_id;
- Uint32 m_tcPtrI;
- Uint32 m_key_info;
- ReceiverType m_type;
- void* m_owner;
- NdbReceiver* m_next;
- /**
- * At setup
- */
- class NdbRecAttr * getValue(const class NdbColumnImpl*, char * user_dst_ptr);
- void do_get_value(NdbReceiver*, Uint32 rows, Uint32 key_size);
- void prepareSend();
- void calculate_batch_size(Uint32, Uint32, Uint32&, Uint32&, Uint32&);
- int execKEYINFO20(Uint32 info, const Uint32* ptr, Uint32 len);
- int execTRANSID_AI(const Uint32* ptr, Uint32 len);
- int execTCOPCONF(Uint32 len);
- int execSCANOPCONF(Uint32 tcPtrI, Uint32 len, Uint32 rows);
- class NdbRecAttr* theFirstRecAttr;
- class NdbRecAttr* theCurrentRecAttr;
- class NdbRecAttr** m_rows;
-
- Uint32 m_list_index; // When using multiple
- Uint32 m_current_row;
- Uint32 m_result_rows;
- Uint32 m_defined_rows;
- Uint32 m_expected_result_length;
- Uint32 m_received_result_length;
-
- bool nextResult() const { return m_current_row < m_result_rows; }
- void copyout(NdbReceiver&);
- };
- #ifdef NDB_NO_DROPPED_SIGNAL
- #include <stdlib.h>
- #endif
- inline
- bool
- NdbReceiver::checkMagicNumber() const {
- bool retVal = (theMagicNumber == 0x11223344);
- #ifdef NDB_NO_DROPPED_SIGNAL
- if(!retVal){
- abort();
- }
- #endif
- return retVal;
- }
- inline
- void
- NdbReceiver::prepareSend(){
- m_current_row = 0;
- m_received_result_length = 0;
- m_expected_result_length = 0;
- theCurrentRecAttr = theFirstRecAttr;
- }
- inline
- int
- NdbReceiver::execTCOPCONF(Uint32 len){
- Uint32 tmp = m_received_result_length;
- m_expected_result_length = len;
- #ifdef assert
- assert(!(tmp && !len));
- #endif
- return ((bool)len ^ (bool)tmp ? 0 : 1);
- }
- inline
- int
- NdbReceiver::execSCANOPCONF(Uint32 tcPtrI, Uint32 len, Uint32 rows){
- m_tcPtrI = tcPtrI;
- m_result_rows = rows;
- Uint32 tmp = m_received_result_length;
- m_expected_result_length = len;
- return (tmp == len ? 1 : 0);
- }
- #endif
- #endif