Tsqr_MessengerBase.hpp

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// ***********************************************************************
//
//                 Anasazi: Block Eigensolvers Package
//                 Copyright (2010) 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
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// 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.
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// 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
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// Questions? Contact Michael A. Heroux (maherou@sandia.gov)
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#ifndef __TSQR_Tsqr_MessengerBase_hpp
#define __TSQR_Tsqr_MessengerBase_hpp


namespace TSQR {
  template< class Datum >
  class MessengerBase {
  public:
    virtual void 
    send (const Datum sendData[], 
    const int sendCount, 
    const int destProc, 
    const int tag) = 0;

    virtual void 
    recv (Datum recvData[], 
    const int recvCount, 
    const int srcProc, 
    const int tag) = 0;

    virtual void 
    swapData (const Datum sendData[], 
        Datum recvData[], 
        const int sendRecvCount, 
        const int destProc, 
        const int tag) = 0;
    
    virtual Datum 
    globalSum (const Datum& inDatum) = 0;

    virtual void
    globalVectorSum (const Datum inData[], 
         Datum outData[], 
         const int count) = 0;

    virtual Datum 
    globalMin (const Datum& inDatum) = 0;

    virtual Datum 
    globalMax (const Datum& inDatum) = 0;

    virtual void
    broadcast (Datum data[], 
         const int count,
         const int root) = 0;

    virtual int rank () const = 0;
    virtual int size () const = 0;
    virtual void barrier () const = 0;
  };

} // namespace TSQR

#endif // __TSQR_Tsqr_MessengerBase_hpp