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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; 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#ifndef OSE_RECEIVER_HPP
#define OSE_RECEIVER_HPP
#include "ose.h"
#include "OSE_Signals.hpp"
#include <kernel_types.h>
class OSE_Receiver {
public:
OSE_Receiver(class TransporterRegistry *,
int recBufSize,
NodeId localNodeId);
~OSE_Receiver();
bool hasData() const ;
bool isFull() const ;
Uint32 getReceiveData(NodeId * remoteNodeId,
Uint32 ** readPtr);
void updateReceiveDataPtr(Uint32 szRead);
bool doReceive(Uint32 timeOutMillis);
PROCESS createPhantom();
void destroyPhantom();
private:
class TransporterRegistry * theTransporterRegistry;
NodeId localNodeId;
char localHostName[255];
bool phantomCreated;
PROCESS phantomPid;
struct OS_redir_entry redir;
int recBufReadIndex;
int recBufWriteIndex;
int recBufSize;
union SIGNAL **receiveBuffer;
// Stack for signals that are received out of order
int waitStackCount;
int waitStackSize;
union SIGNAL** waitStack;
// Counters for the next signal id
Uint32* nextSigId;
class OSE_Transporter * getTransporter(NodeId nodeId);
void insertReceiveBuffer(union SIGNAL * _sig);
void clearRecvBuffer(NodeId _nodeId);
bool checkWaitStack(NodeId _nodeId);
void clearWaitStack(NodeId _nodeId);
void insertWaitStack(union SIGNAL* _sig);
};
inline
bool
OSE_Receiver::hasData () const {
return recBufReadIndex != recBufWriteIndex;
}
inline
bool
OSE_Receiver::isFull () const {
return ((recBufWriteIndex + 1) % recBufSize) == recBufWriteIndex;
}
inline
Uint32
OSE_Receiver::getReceiveData(NodeId * remoteNodeId,
Uint32 ** readPtr){
NdbTransporterData *s = (NdbTransporterData *)receiveBuffer[recBufReadIndex];
if(recBufReadIndex != recBufWriteIndex){
* remoteNodeId = s->senderNodeId;
* readPtr = &s->data[0];
return s->length;
}
return 0;
}
inline
void
OSE_Receiver::updateReceiveDataPtr(Uint32 bytesRead){
if(bytesRead != 0){
free_buf(&receiveBuffer[recBufReadIndex]);
recBufReadIndex = (recBufReadIndex + 1) % recBufSize;
}
}
inline
void
OSE_Receiver::insertReceiveBuffer(union SIGNAL * _sig){
receiveBuffer[recBufWriteIndex] = _sig;
recBufWriteIndex = (recBufWriteIndex + 1) % recBufSize;
}
#endif
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