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// Thyra: Interfaces and Support for Abstract Numerical Algorithms
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#ifndef THYRA_SPMD_LOCAL_DATA_ACCESS_DECL_HPP
#define THYRA_SPMD_LOCAL_DATA_ACCESS_DECL_HPP
#include "Thyra_OperatorVectorTypes.hpp"
namespace Thyra {
/** \defgroup Thyra_Op_Vec_adapters_spmd_local_data_access_grp Official utilities for accessing local data in SPMD vectors and multi-vectors.
*
* \ingroup Thyra_Op_Vec_spmd_adapters_grp
*
* \brief These non-member helper functions provide the standard way by which
* clients can get access to local data in VectorBase and MultiVector base
* objects for the standard SPMD objects. They are the primary
* interoperability mechanism for clients to get at local SPMD VectorBase and
* MultiVectorBase data.
*
* All of these views follow the constraints of the Generalized View Design
* Pattern defined
* <a href="../../../teuchos/doc/html/TeuchosMemoryManagementSAND.pdf">here</a>.
* That means a few things:
* <ul>
*
* <li>Unlimited const views are allowed but only a single non-const view is
* allowed.</li>
*
* <li>Once a single non-const view is created, no other const or non-const
* views are allowed.</li>
*
* <li>If any view is active, a non-const view can not be created.</li>
*
* <li>Changes to an object through a non-const view are not guaranteed to be
* reflected in the parent object until the view is released.</li>
*
* </ul>
*
* ToDo: Finish Documentation!
*/
/** \brief Return a contiguous non-const semi-persisting view of the local
* process data of a VectorBase object.
*
* \ingroup Thyra_Op_Vec_adapters_spmd_local_data_access_grp
*/
template<class Scalar>
RTOpPack::SubVectorView<Scalar>
getNonconstLocalSubVectorView(
const RCP<VectorBase<Scalar> > &vec);
/** \brief Return a contiguous const semi-persisting view of the local process
* data of a VectorBase object.
*
* \ingroup Thyra_Op_Vec_adapters_spmd_local_data_access_grp
*/
template<class Scalar>
RTOpPack::ConstSubVectorView<Scalar>
getLocalSubVectorView(
const RCP<const VectorBase<Scalar> > &vec);
/** \brief Return a contiguous non-const semi-persisting view of the local
* process data of a MultiVectorBase object.
*
* \ingroup Thyra_Op_Vec_adapters_spmd_local_data_access_grp
*/
template<class Scalar>
RTOpPack::SubMultiVectorView<Scalar>
getNonconstLocalSubMultiVectorView(
const RCP<MultiVectorBase<Scalar> > &multivec);
/** \brief Return a contiguous const semi-persisting view of the local process
* data of a MultiVectorBase object.
*
* \ingroup Thyra_Op_Vec_adapters_spmd_local_data_access_grp
*/
template<class Scalar>
RTOpPack::ConstSubMultiVectorView<Scalar>
getLocalSubMultiVectorView(
const RCP<const MultiVectorBase<Scalar> > &multivec);
} // end namespace Thyra
#endif // THYRA_SPMD_LOCAL_DATA_ACCESS_DECL_HPP
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