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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 NdbScanReceiver_H
#define NdbScanReceiver_H
#include "Ndb.hpp"
#include "NdbConnection.hpp"
#include "NdbOperation.hpp"
#include "NdbApiSignal.hpp"
#include "NdbReceiver.hpp"
#include <NdbOut.hpp>
#include <assert.h>
class NdbScanReceiver
{
enum ReceiverStatus { Init,
Waiting,
Completed,
Executed,
Released };
friend class Ndb;
friend class NdbOperation;
public:
NdbScanReceiver(Ndb *aNdb) :
theReceiver(aNdb),
theNdbOp(NULL),
theFirstTRANSID_AI_Recv(NULL),
theLastTRANSID_AI_Recv(NULL),
theFirstKEYINFO20_Recv(NULL),
theLastKEYINFO20_Recv(NULL),
theTotalRecAI_Len(0),
theTotalKI_Len(0xFFFFFFFF),
theTotalRecKI_Len(0),
theStatus(Init),
theNextScanRec(NULL)
{
theReceiver.init(NdbReceiver::NDB_SCANRECEIVER, this);
}
int checkMagicNumber();
int receiveTRANSID_AI_SCAN(NdbApiSignal*);
int receiveKEYINFO20(NdbApiSignal*);
int executeSavedSignals();
void prepareNextScanResult();
NdbScanReceiver* next();
void next(NdbScanReceiver*);
bool isCompleted(Uint32 aiLenToReceive);
void setCompleted();
void init(NdbOperation* aNdbOp, bool lockMode);
Uint32 ptr2int() { return theReceiver.getId(); };
private:
NdbScanReceiver();
void release();
NdbReceiver theReceiver;
NdbOperation* theNdbOp;
NdbApiSignal* theFirstTRANSID_AI_Recv;
NdbApiSignal* theLastTRANSID_AI_Recv;
NdbApiSignal* theFirstKEYINFO20_Recv;
NdbApiSignal* theLastKEYINFO20_Recv;
Uint32 theTotalRecAI_Len;
Uint32 theTotalKI_Len;
Uint32 theTotalRecKI_Len;
ReceiverStatus theStatus;
Uint32 theMagicNumber;
NdbScanReceiver* theNextScanRec;
bool theLockMode;
};
inline
void
NdbScanReceiver::init(NdbOperation* aNdbOp, bool lockMode){
assert(theStatus == Init || theStatus == Released);
theNdbOp = aNdbOp;
theMagicNumber = 0xA0B1C2D3;
theTotalRecAI_Len = 0;
/* If we are locking the records for take over
* KI_len to receive is at least 1, since we don't know yet
* how much KI we are expecting(this is written in the first KI signal)
* set theTotalKI_Len to FFFFFFFF, this will make the ScanReciever wait for
* at least the first KI, and when that is received we will know if
* we are expecting another one
*/
theLockMode = lockMode;
if (theLockMode == true)
theTotalKI_Len = 0xFFFFFFFF;
else
theTotalKI_Len = 0;
theTotalRecKI_Len = 0;
assert(theNextScanRec == NULL);
theNextScanRec = NULL;
assert(theFirstTRANSID_AI_Recv == NULL);
theFirstTRANSID_AI_Recv = NULL;
assert(theLastTRANSID_AI_Recv == NULL);
theLastTRANSID_AI_Recv = NULL;
assert(theFirstKEYINFO20_Recv == NULL);
theFirstKEYINFO20_Recv = NULL;
theLastKEYINFO20_Recv = NULL;
theStatus = Waiting;
};
inline
void
NdbScanReceiver::release(){
theStatus = Released;
// theNdbOp->theNdb->releaseSignalsInList(&theFirstTRANSID_AI_Recv);
while(theFirstTRANSID_AI_Recv != NULL){
NdbApiSignal* tmp = theFirstTRANSID_AI_Recv;
theFirstTRANSID_AI_Recv = tmp->next();
delete tmp;
}
theFirstTRANSID_AI_Recv = NULL;
theLastTRANSID_AI_Recv = NULL;
// theNdbOp->theNdb->releaseSignalsInList(&theFirstKEYINFO20_Recv);
while(theFirstKEYINFO20_Recv != NULL){
NdbApiSignal* tmp = theFirstKEYINFO20_Recv;
theFirstKEYINFO20_Recv = tmp->next();
delete tmp;
}
theFirstKEYINFO20_Recv = NULL;
theLastKEYINFO20_Recv = NULL;
theNdbOp = NULL;
theTotalRecAI_Len = 0;
theTotalRecKI_Len = 0;
theTotalKI_Len = 0xFFFFFFFF;
};
inline
int
NdbScanReceiver::checkMagicNumber()
{
if (theMagicNumber != 0xA0B1C2D3)
return -1;
return 0;
}
inline
NdbScanReceiver*
NdbScanReceiver::next(){
return theNextScanRec;
}
inline
void
NdbScanReceiver::next(NdbScanReceiver* aScanRec){
theNextScanRec = aScanRec;
}
inline
bool
NdbScanReceiver::isCompleted(Uint32 aiLenToReceive){
assert(theStatus == Waiting || theStatus == Completed);
#if 0
ndbout << "NdbScanReceiver::isCompleted"<<endl
<< " theStatus = " << theStatus << endl
<< " theTotalRecAI_Len = " << theTotalRecAI_Len << endl
<< " aiLenToReceive = " << aiLenToReceive << endl
<< " theTotalRecKI_Len = "<< theTotalRecKI_Len << endl
<< " theTotalKI_Len = "<< theTotalKI_Len << endl;
#endif
// Have we already receive everything
if(theStatus == Completed)
return true;
// Check that we have received AI
if(theTotalRecAI_Len < aiLenToReceive)
return false;
// Check that we have recieved KI
if (theTotalRecKI_Len < theTotalKI_Len)
return false;
// We should not have recieved more AI
assert(theTotalRecAI_Len <= aiLenToReceive);
return true;
}
inline
void
NdbScanReceiver::setCompleted(){
theStatus = Completed;
}
#endif
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