BelosOutputManager.hpp

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// @HEADER
// *****************************************************************************
//                 Belos: Block Linear Solvers Package
//
// Copyright 2004-2016 NTESS and the Belos contributors.
// SPDX-License-Identifier: BSD-3-Clause
// *****************************************************************************
// @HEADER

#ifndef BELOS_OUTPUT_MANAGER_HPP
#define BELOS_OUTPUT_MANAGER_HPP

#include "BelosConfigDefs.hpp"
#include "BelosTypes.hpp"
#include "Teuchos_oblackholestream.hpp" 
#include "Teuchos_RCP.hpp"

#ifdef HAVE_MPI
#include <mpi.h>
#include "BelosGlobalComm.hpp"
#endif

namespace Belos {
  
  template <class ScalarType>
  class OutputManager {
    
  public:
    

    
    OutputManager( int vb = Belos::Errors, const Teuchos::RCP< std::ostream > &os = Teuchos::rcp(&std::cout,false) );
    
    virtual ~OutputManager() {};
    

    
    void setOStream( const Teuchos::RCP<std::ostream> &os ) { myOS_ = os; };
    
    void setVerbosity( int vb ) { vb_ = vb; }; 
    
    


    std::ostream& stream( MsgType type ) 
    {
      if ( (type & vb_) && iPrint_ ) {
  return *myOS_;
      }
      return myBHS_;
    }
 
    Teuchos::RCP<std::ostream> getOStream() { return myOS_; };
    
    

    

    bool isVerbosity( MsgType type ) const { return (( type == Belos::Errors ) || ( vb_ & type )); }; 
    


    
    void print( MsgType type, const std::string output );


  private:
    

    
    OutputManager( const OutputManager<ScalarType>& OM );
    
    OutputManager<ScalarType>& operator=( const OutputManager<ScalarType>& OM );
    
    
    int vb_;
    Teuchos::RCP<std::ostream> myOS_; 
    Teuchos::oblackholestream myBHS_;  
    bool iPrint_;
  };
  
  template<class ScalarType>
  OutputManager<ScalarType>::OutputManager( int vb, const Teuchos::RCP<std::ostream> &os ) :
    vb_(vb),
    myOS_(os)
  {
    int MyPID;
#ifdef HAVE_MPI
    // Initialize MPI
    int mpiStarted = 0;
    MPI_Initialized(&mpiStarted);
    if (mpiStarted) MPI_Comm_rank(Belos::get_global_comm(), &MyPID);
    else MyPID=0;
#else 
    MyPID = 0;
#endif
    iPrint_ = (MyPID == 0);
  }
 
  template<class ScalarType>
  void OutputManager<ScalarType>::print( MsgType type, const std::string output ) {
  if ( (type & vb_) && iPrint_ ) {
    *myOS_ << output;
  }
}
 
} // end Belos namespace

#endif

// end of file BelosOutputManager.hpp