sparse_matrix_impl.hpp

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/*
         Copyright (c) 2012 The Regents of the University of California,
         through Lawrence Berkeley National Laboratory.  

   Author: Mathias Jacquelin and Lin Lin
         
   This file is part of PEXSI. All rights reserved.

         Redistribution and use in source and binary forms, with or without
         modification, are permitted provided that the following conditions are met:

         (1) Redistributions of source code must retain the above copyright notice, this
         list of conditions and the following disclaimer.
         (2) Redistributions in binary form must reproduce the above copyright notice,
         this list of conditions and the following disclaimer in the documentation
         and/or other materials provided with the distribution.
         (3) Neither the name of the University of California, Lawrence Berkeley
         National Laboratory, U.S. Dept. of Energy nor the names of its contributors may
         be used to endorse or promote products derived from this software without
         specific prior written permission.

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*/
#ifndef _PEXSI_SPARSE_MATRIX_IMPL_HPP_
#define _PEXSI_SPARSE_MATRIX_IMPL_HPP_

#include <iostream>
#include "environment.hpp"

using std::ifstream;
using std::ofstream;

#include "utility.hpp"


namespace  PEXSI{

template <class F> inline LongInt DistSparseMatrix<F>::Nnz ( )
{
#ifndef _RELEASE_
        PushCallStack("DistSparseMatrix<F>::Nnz");
#endif  
  LongInt nnzLocalLong = nnzLocal;
  LongInt nnz;

  MPI_Allreduce( &nnzLocalLong, &nnz, 1, MPI_LONG_LONG, MPI_SUM,
      comm );

#ifndef _RELEASE_
        PopCallStack();
#endif  

  return nnz;
}               // -----  end of method DistSparseMatrix<F>::Nnz  ----- 





} // namespace PEXSI

#endif // _PEXSI_SPARSE_MATRIX_IMPL_HPP_