KrylovUtils.hpp

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/*
 * ------------------------------------------------------------------------------------------------------------
 * SPDX-License-Identifier: LGPL-2.1-only
 *
 * Copyright (c) 2018-2020 Lawrence Livermore National Security LLC
 * Copyright (c) 2018-2020 The Board of Trustees of the Leland Stanford Junior University
 * Copyright (c) 2018-2020 Total, S.A
 * Copyright (c) 2019-     GEOSX Contributors
 * All rights reserved
 *
 * See top level LICENSE, COPYRIGHT, CONTRIBUTORS, NOTICE, and ACKNOWLEDGEMENTS files for details.
 * ------------------------------------------------------------------------------------------------------------
 */

#ifndef GEOSX_LINEARALGEBRA_SOLVERS_KRYLOVUTILS_HPP_
#define GEOSX_LINEARALGEBRA_SOLVERS_KRYLOVUTILS_HPP_

#include "codingUtilities/Utilities.hpp"

#define GEOSX_KRYLOV_MIN_DIV ::LvArray::NumericLimits< real64 >::epsilon

#ifndef GEOSX_KRYLOV_BREAKDOWN_IF_ZERO

#define GEOSX_KRYLOV_BREAKDOWN_IF_ZERO( VAR ) \
  do { \
    if( isZero( VAR, GEOSX_KRYLOV_MIN_DIV ) ) \
    { \
      GEOSX_LOG_LEVEL_RANK_0( 1, "Breakdown in " << methodName() << ": " << #VAR << " = " << VAR ); \
      m_result.status = LinearSolverResult::Status::Breakdown; \
      break; \
    } \
  } while( false )
#endif

#endif //GEOSX_LINEARALGEBRA_SOLVERS_KRYLOVUTILS_HPP_