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// ***********************************************************************
//
// EpetraExt: Epetra Extended - Linear Algebra Services Package
// Copyright (2011) Sandia Corporation
//
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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//@HEADER
#ifndef EPETRAEXT_MULTICOMM_H
#define EPETRAEXT_MULTICOMM_H
#include "EpetraExt_ConfigDefs.h"
#include "Epetra_Comm.h"
//! EpetraExt::MultiComm is an abstract class for keeping track of two levels of
//! parallelism. The class is an Epetra_Comm for the global problem
//! and contains another Eptra_Comm of the split problem. Each processor
//! is part of the global problem, and part of a sub-domain.
/*! EpetraExt::MultComm: The class is an Epetra_Comm for the global problem
and contains another Epetra_Comm of the split problem. Each processor
is part of the global communicator, and a sub-domain communicator.
<b>Constructing EpetraExt::MultComm objects</b>
*/
namespace EpetraExt {
class MultiComm: public virtual Epetra_Comm {
public:
//! Constructor
MultiComm() {}
//! Destructor
virtual ~MultiComm() {};
//! Get reference to split Communicator for sub-domain
virtual Epetra_Comm& SubDomainComm() const = 0;
//! Get reference to split Communicator for time domain
virtual Epetra_Comm& TimeDomainComm() const = 0;
//! Return number of sub-domains that the global problem is split into.
virtual int NumSubDomains() const = 0;
//! Return integer [0:numSubDomains-1} corresponding to this sub-domain's rank.
virtual int SubDomainRank() const = 0;
//! Return number of time domains that the global problem is split into.
virtual int NumTimeDomains() const = 0;
//! Return integer [0:numTimeDomains-1} corresponding to this time-domain's rank.
virtual int TimeDomainRank() const = 0;
//! Return number of time steps, first step number, on time domain.
virtual int NumTimeStepsOnDomain() const = 0;
virtual int FirstTimeStepOnDomain() const = 0;
//! Return total number of time steps.
virtual int NumTimeSteps() const = 0;
//! Reset total number of time steps, allowing time steps per domain to
// be set later than the MultiLevel parallelism is set up.
virtual void ResetNumTimeSteps(int numTimeSteps) = 0;
};
} //namespace EpetraExt
#endif /* EPETRAEXT_MULTICOMM_H */
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