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/////////////////////////////////////////////////////////////
// //
// Copyright (c) 2003-2014 by The University of Queensland //
// Centre for Geoscience Computing //
// http://earth.uq.edu.au/centre-geoscience-computing //
// //
// Primary Business: Brisbane, Queensland, Australia //
// Licensed under the Open Software License version 3.0 //
// http://www.apache.org/licenses/LICENSE-2.0 //
// //
/////////////////////////////////////////////////////////////
#ifndef __MPIVBUF_H
#define __MPIVBUF_H
#include <mpi.h>
#include <string>
#include "Parallel/mpibuf.h"
/*!
\class CVarMPIBuffer
\brief MPI send/recv buffer with automagically adjusted size
CVarMPIBuffer implements a send/receive buffer with variable size. The buffer grows automatically if neccesary with each append operation and when the a message is received. It is never automatically shrunk. Both append and send/recv operations slower than a constant size buffer (CMPIBuffer)
\author Steffen Abe
$Revision$
$Date$
\todo implement checks for locking
\todo use exeption handling for error checking
*/
class CVarMPIBuffer : public AMPIBufferPP
{
private:
char* m_buffer;
int m_buffersize; //!< the size of the buffer
int m_position; //!< the current end of the content
int m_int_increment,m_dbl_increment; //!< the "packing size" of int/double
bool m_lock;
MPI_Request m_req[2];
MPI_Status m_stat[2];//!< for the ISendTo/Wait stuff
protected:
void grow();
void growTo(int);
public:
CVarMPIBuffer(MPI_Comm,int size=16);
virtual ~CVarMPIBuffer();
virtual void clear(){m_position=0;};
virtual void sendTo(int,int);
virtual void NBsendTo(int,int);
virtual void initSendTo(int,int);
virtual void wait();
virtual void receiveFrom(int src=MPI_ANY_SOURCE,int tag=MPI_ANY_TAG);
virtual void append(int);
virtual void append(double);
virtual void append(const char*);
virtual void append(const Vec3 &V) { AMPIBufferPP::append(V); } ;
virtual int pop_int();
virtual double pop_double();
virtual void pop_doubles(double*,int);
virtual std::string pop_string();
virtual void broadcast(int);
virtual void receiveBroadcast(int);
};
#endif //__MPIVBUF_H
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