OSE_Receiver.hpp
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:3k
- /* 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 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