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/*
************************************************************************
EpetraExt: Extended Linear Algebra Services Package
Copyright (2001) 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 EPETRAEXT_MULTIMPICOMM_H
#define EPETRAEXT_MULTIMPICOMM_H
#include "EpetraExt_ConfigDefs.h"
#include "EpetraExt_MultiComm.h"
#include "Epetra_MpiComm.h"
//! EpetraExt::MultiMpiComm is a class for keeping track of two levels of
//! parallelism. The class is an Epetra_MpiComm for the global problem
//! and contains another Eptra_MpiComm of the split problem. Each processor
//! is part of the global problem, and part of a sub-domain.
/*! EpetraExt::MultMpiComm: The class is an Epetra_MpiComm for the global problem
and contains another Epetra_MpiComm of the split problem. Each processor
is part of the global communicator, and a sub-domain communicator.
<b>Constructing EpetraExt::MultMpiComm objects</b>
*/
namespace EpetraExt {
class MultiMpiComm: public EpetraExt::MultiComm {
public:
//@{ \name Constructors/Destructor.
//! MultiMpiComm constuctor
/*! Creates a MultiMpiComm object and communicators for the global and sub- problems.
\param In
globalComm - MPI communciator (usually MPI_COMM_WORLD)
\param In
subDomainProcss - number of processors in each subdomain. This must divide evenly into the total number of processors of the globalComm.
\param In
numTimeSteps (Default=-1) - Piece of partitioning data needed specifically for parallel space-time project, corresponding to the total number of time steps.
*/
MultiMpiComm(MPI_Comm globalComm, int subDomainProcs, int numTimeSteps_=-1);
//! MultiMpiComm constuctor, no parallelism over domains
/*! Creates a MultiMpiComm object for the simple case of no parallelism over
multiple steps.
\param In
EpetraMpiComm - Epetra_MpiComm communciator
\param In
numTimeSteps - Number of steps
*/
MultiMpiComm(const Epetra_MpiComm& Comm, int numTimeSteps_);
//! Copy constructor.
MultiMpiComm( const MultiMpiComm &MMC );
//! Destructor
virtual ~MultiMpiComm();
//@}
//! Get reference to split Communicator for sub-domain
Epetra_Comm& SubDomainComm() const {return *subComm;}
//! Get reference to split MPI Communicator for sub-domain
Epetra_MpiComm& SubDomainMpiComm() const {return *subComm;}
//! Reset total number of time steps, allowing time steps per domain to
// be set later than the MultiLevel parallelism is set up.
void ResetNumTimeSteps(int numTimeSteps);
protected:
Epetra_MpiComm* subComm;
};
} //namespace EpetraExt
#endif /* EPETRAEXT_MULTIMPICOMM_H */
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