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overlappingscalarproduct.hh
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// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
// vi: set et ts=4 sw=4 sts=4:
/*
This file is part of the Open Porous Media project (OPM).
OPM is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
OPM 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with OPM. If not, see <http://www.gnu.org/licenses/>.
Consult the COPYING file in the top-level source directory of this
module for the precise wording of the license and the list of
copyright holders.
*/
#ifndef EWOMS_OVERLAPPING_SCALAR_PRODUCT_HH
#define EWOMS_OVERLAPPING_SCALAR_PRODUCT_HH
#include <dune/common/parallel/mpihelper.hh>
#include <dune/istl/scalarproducts.hh>
namespace Opm {
namespace Linear {
template <class OverlappingBlockVector, class Overlap>
class OverlappingScalarProduct
: public Dune::ScalarProduct<OverlappingBlockVector>
{
public:
using field_type = typename OverlappingBlockVector::field_type;
using CollectiveCommunication = typename Dune::Communication<typename Dune::MPIHelper::MPICommunicator>;
using real_type = typename Dune::ScalarProduct<OverlappingBlockVector>::real_type;
Dune::SolverCategory::Category category() const override
{ return Dune::SolverCategory::overlapping; }
explicit OverlappingScalarProduct(const Overlap& overlap)
: overlap_(overlap),
comm_( Dune::MPIHelper::getCommunication() )
{}
field_type dot(const OverlappingBlockVector& x,
const OverlappingBlockVector& y) const override
{
field_type sum = 0;
size_t numLocal = overlap_.numLocal();
for (unsigned localIdx = 0; localIdx < numLocal; ++localIdx) {
if (overlap_.iAmMasterOf(static_cast<int>(localIdx)))
sum += x[localIdx] * y[localIdx];
}
// return the global sum
return comm_.sum( sum );
}
real_type norm(const OverlappingBlockVector& x) const override
{ return std::sqrt(dot(x, x)); }
private:
const Overlap& overlap_;
const CollectiveCommunication comm_;
};
} // namespace Linear
} // namespace Opm
#endif
Opm::Linear::OverlappingScalarProduct
An overlap aware ISTL scalar product.
Definition overlappingscalarproduct.hh:42
Opm::Linear::OverlappingScalarProduct::category
Dune::SolverCategory::Category category() const override
the kind of computations supported by the operator. Either overlapping or non-overlapping
Definition overlappingscalarproduct.hh:50
Opm
This file contains a set of helper functions used by VFPProd / VFPInj.
Definition blackoilbioeffectsmodules.hh:43