PetscUtils.hpp

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/*
 * ------------------------------------------------------------------------------------------------------------
 * SPDX-License-Identifier: LGPL-2.1-only
 *
 * Copyright (c) 2016-2024 Lawrence Livermore National Security LLC
 * Copyright (c) 2018-2024 TotalEnergies
 * Copyright (c) 2018-2024 The Board of Trustees of the Leland Stanford Junior University
 * Copyright (c) 2023-2024 Chevron
 * Copyright (c) 2019-     GEOS/GEOSX Contributors
 * All rights reserved
 *
 * See top level LICENSE, COPYRIGHT, CONTRIBUTORS, NOTICE, and ACKNOWLEDGEMENTS files for details.
 * ------------------------------------------------------------------------------------------------------------
 */
 
#ifndef GEOS_LINEARALGEBRA_INTERFACES_PETSCUTILS_HPP
#define GEOS_LINEARALGEBRA_INTERFACES_PETSCUTILS_HPP
 
#include "common/DataTypes.hpp"
 
#include <petscsys.h>
 
namespace geos
{
 
namespace petsc
{
 
// Check matching requirements on index/value types between GEOS and PETSc
 
static_assert( sizeof( PetscInt ) == sizeof( geos::globalIndex ),
               "PetscInt and geos::globalIndex must have the same size" );
 
static_assert( std::is_signed< PetscInt >::value == std::is_signed< geos::globalIndex >::value,
               "PetscInt and geoex::globalIndex must both be signed or unsigned" );
 
static_assert( std::is_same< PetscScalar, geos::real64 >::value,
               "PetscScalar and geos::real64 must be the same type" );
 
inline PetscInt * toPetscInt( globalIndex * const index )
{
  return reinterpret_cast< PetscInt * >(index);
}
 
inline PetscInt const * toPetscInt( globalIndex const * const index )
{
  return reinterpret_cast< PetscInt const * >(index);
}
 
} // namespace petsc
 
} // namespace geos
 
#endif //GEOS_LINEARALGEBRA_INTERFACES_PETSCUTILS_HPP