Teuchos_Comm.hpp

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// @HEADER
// ***********************************************************************
//
//                    Teuchos: Common Tools Package
//                 Copyright (2004) Sandia Corporation
//
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
// license for use of this work by or on behalf of the U.S. Government.
//
// This library is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; either version 2.1 of the
// License, or (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA
// Questions? Contact Michael A. Heroux (maherou@sandia.gov)
//
// ***********************************************************************
// @HEADER

#ifndef TEUCHOS_COMM_HPP
#define TEUCHOS_COMM_HPP

#include "Teuchos_ReductionOp.hpp"
#include "Teuchos_ArrayRCP.hpp"

namespace Teuchos {


class CommRequest : public Teuchos::Describable {};


template<typename Ordinal>
class Comm : virtual public Describable {
public:
  


  virtual int getRank() const = 0;

  virtual int getSize() const = 0;
  



  virtual void barrier() const = 0;
  
  virtual void broadcast(
    const int rootRank, const Ordinal bytes, char buffer[]
    ) const = 0;

  virtual void gatherAll(
    const Ordinal sendBytes, const char sendBuffer[]
    ,const Ordinal recvBytes, char recvBuffer[]
    ) const = 0;

  virtual void reduceAll(
    const ValueTypeReductionOp<Ordinal,char> &reductOp
    ,const Ordinal bytes, const char sendBuffer[], char globalReducts[]
    ) const = 0;

  virtual void reduceAllAndScatter(
    const ValueTypeReductionOp<Ordinal,char> &reductOp
    ,const Ordinal sendBytes, const char sendBuffer[]
    ,const Ordinal recvCounts[], char myGlobalReducts[]
    ) const = 0;

  virtual void scan(
    const ValueTypeReductionOp<Ordinal,char> &reductOp
    ,const Ordinal bytes, const char sendBuffer[], char scanReducts[]
    ) const = 0;



  virtual void send(
    const Ordinal bytes, const char sendBuffer[], const int destRank
    ) const = 0;

  virtual int receive(
    const int sourceRank, const Ordinal bytes, char recvBuffer[]
    ) const = 0;


  virtual void readySend(
    const ArrayView<const char> &sendBuffer,
    const int destRank
    ) const = 0;
  






  virtual RCP<CommRequest> isend(
    const ArrayView<const char> &sendBuffer,
    const int destRank
    ) const = 0;


  virtual RCP<CommRequest> ireceive(
    const ArrayView<char> &recvBuffer,
    const int sourceRank
    ) const = 0;


  virtual void waitAll(
    const ArrayView<RCP<CommRequest> > &requests
    ) const = 0;


  virtual void wait(
    const Ptr<RCP<CommRequest> > &request
    ) const = 0;


  
}; // class Comm

} // namespace Teuchos

#endif // TEUCHOS_COMM_HPP