Thyra_TpetraVectorSpace_def.hpp

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// @HEADER
// *****************************************************************************
//    Thyra: Interfaces and Support for Abstract Numerical Algorithms
//
// Copyright 2004 NTESS and the Thyra contributors.
// SPDX-License-Identifier: BSD-3-Clause
// *****************************************************************************
// @HEADER

#ifndef THYRA_TPETRA_VECTOR_SPACE_HPP
#define THYRA_TPETRA_VECTOR_SPACE_HPP


#include "Thyra_TpetraVectorSpace_decl.hpp"
#include "Thyra_TpetraThyraWrappers.hpp"
#include "Thyra_TpetraVector.hpp"
#include "Thyra_TpetraMultiVector.hpp"
#include "Thyra_TpetraEuclideanScalarProd.hpp"
#include "Tpetra_Details_StaticView.hpp"

namespace Thyra {


template <class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
RCP<TpetraVectorSpace<Scalar,LocalOrdinal,GlobalOrdinal,Node> >
TpetraVectorSpace<Scalar,LocalOrdinal,GlobalOrdinal,Node>::create()
{
  const RCP<this_t> vs(new this_t);
  vs->weakSelfPtr_ = vs.create_weak();
  return vs;
}


template <class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
void TpetraVectorSpace<Scalar,LocalOrdinal,GlobalOrdinal,Node>::initialize(
  const RCP<const Tpetra::Map<LocalOrdinal,GlobalOrdinal,Node> > &tpetraMap
  )
{
  comm_ = convertTpetraToThyraComm(tpetraMap->getComm());
  tpetraMap_ = tpetraMap;
  this->updateState(tpetraMap->getGlobalNumElements(),
    !tpetraMap->isDistributed());
  this->setScalarProd(tpetraEuclideanScalarProd<Scalar,LocalOrdinal,GlobalOrdinal,Node>());
}


// Utility functions


template <class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
RCP<TpetraVectorSpace<Scalar,LocalOrdinal,GlobalOrdinal,Node>>
TpetraVectorSpace<Scalar,LocalOrdinal,GlobalOrdinal,Node>
::createLocallyReplicatedVectorSpace(int size) const
{
  return tpetraVectorSpace<Scalar>(
    Tpetra::createLocalMapWithNode<LocalOrdinal,GlobalOrdinal,Node>(
      size, tpetraMap_->getComm() ) );
}


// Overridden from VectorSpace


template <class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
RCP<VectorBase<Scalar> >
TpetraVectorSpace<Scalar,LocalOrdinal,GlobalOrdinal,Node>::createMember() const
{
  return tpetraVector<Scalar>(
    weakSelfPtr_.create_strong().getConst(),
    Teuchos::rcp(
      new Tpetra::Vector<Scalar,LocalOrdinal,GlobalOrdinal,Node>(tpetraMap_, false)
      )
    );
}


template <class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
RCP< MultiVectorBase<Scalar> >
TpetraVectorSpace<Scalar,LocalOrdinal,GlobalOrdinal,Node>::createMembers(int numMembers) const
{
  return tpetraMultiVector<Scalar>(
    weakSelfPtr_.create_strong().getConst(),
    this->createLocallyReplicatedVectorSpace(numMembers),
    Teuchos::rcp(
      new Tpetra::MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node>(
        tpetraMap_, numMembers, false)
      )
    );
}


template<class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
class CopyTpetraMultiVectorViewBack {
public:
  CopyTpetraMultiVectorViewBack( RCP<MultiVectorBase<Scalar> > mv, const RTOpPack::SubMultiVectorView<Scalar>  &raw_mv )
    :mv_(mv), raw_mv_(raw_mv)
    {
      RCP<Tpetra::MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node> > tmv = Teuchos::rcp_dynamic_cast<TpetraMultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node> >(mv_,true)->getTpetraMultiVector();
      bool inUse = Teuchos::get_extra_data<bool>(tmv,"inUse");
      TEUCHOS_TEST_FOR_EXCEPTION(inUse,
                                 std::runtime_error,
                                 "Cannot use the cached vector simultaneously more than once.");
      inUse = true;
      Teuchos::set_extra_data(inUse,"inUse",Teuchos::outArg(tmv), Teuchos::POST_DESTROY, false);
    }
  ~CopyTpetraMultiVectorViewBack()
    {
      RTOpPack::ConstSubMultiVectorView<Scalar> smv;
      mv_->acquireDetachedView(Range1D(),Range1D(),&smv);
      RTOpPack::assign_entries<Scalar>( Teuchos::outArg(raw_mv_), smv );
      mv_->releaseDetachedView(&smv);
      bool inUse = false;
      RCP<Tpetra::MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node> > tmv = Teuchos::rcp_dynamic_cast<TpetraMultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node> >(mv_,true)->getTpetraMultiVector();
      Teuchos::set_extra_data(inUse,"inUse",Teuchos::outArg(tmv), Teuchos::POST_DESTROY, false);
    }
private:
  RCP<MultiVectorBase<Scalar> >               mv_;
  const RTOpPack::SubMultiVectorView<Scalar>  raw_mv_;
};


template<class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
RCP< MultiVectorBase<Scalar> >
TpetraVectorSpace<Scalar,LocalOrdinal,GlobalOrdinal,Node>::createCachedMembersView(
                                                                                   const RTOpPack::SubMultiVectorView<Scalar> &raw_mv,
                                                                                   const bool initialize) const
{
#ifdef TEUCHOS_DEBUG
  TEUCHOS_TEST_FOR_EXCEPT( raw_mv.subDim() != this->dim() );
#endif

  // Create a multi-vector
  RCP< MultiVectorBase<Scalar> > mv;
  if (!tpetraMap_->isDistributed()) {

    if (tpetraMV_.is_null() || (tpetraMV_->getNumVectors() != size_t (raw_mv.numSubCols()))) {
      if (!tpetraMV_.is_null())
        // The MV is already allocated. If we are still using it, then very bad things can happen.
      TEUCHOS_TEST_FOR_EXCEPTION(Teuchos::get_extra_data<bool>(tpetraMV_,"inUse"),
                                 std::runtime_error,
                                 "Cannot use the cached vector simultaneously more than once.");
      using IST = typename Tpetra::MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node>::impl_scalar_type;
      using DT = typename Tpetra::MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node>::device_type;
      auto dv = ::Tpetra::Details::getStatic2dDualView<IST, DT> (tpetraMap_->getGlobalNumElements(), raw_mv.numSubCols());
      tpetraMV_ = Teuchos::rcp(new Tpetra::MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node>(tpetraMap_, dv));
      bool inUse = false;
      Teuchos::set_extra_data(inUse,"inUse",Teuchos::outArg(tpetraMV_));
    }

    if (tpetraDomainSpace_.is_null() || raw_mv.numSubCols() != tpetraDomainSpace_->localSubDim())
      tpetraDomainSpace_ = tpetraVectorSpace<Scalar>(Tpetra::createLocalMapWithNode<LocalOrdinal, GlobalOrdinal, Node>(raw_mv.numSubCols(), tpetraMap_->getComm()));

    mv = tpetraMultiVector<Scalar>(weakSelfPtr_.create_strong().getConst(), tpetraDomainSpace_, tpetraMV_);
  } else {
    mv = this->createMembers(raw_mv.numSubCols());
    bool inUse = false;
    RCP<Tpetra::MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node> > tmv = Teuchos::rcp_dynamic_cast<TpetraMultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node> >(mv,true)->getTpetraMultiVector();
    Teuchos::set_extra_data(inUse,"inUse",Teuchos::outArg(tmv));
  }
  if (initialize) {
    // Copy initial values in raw_mv into multi-vector
    RTOpPack::SubMultiVectorView<Scalar> smv;
    mv->acquireDetachedView(Range1D(),Range1D(),&smv);
    RTOpPack::assign_entries<Scalar>(
                                     Ptr<const RTOpPack::SubMultiVectorView<Scalar> >(Teuchos::outArg(smv)),
                                     raw_mv
                                     );
    mv->commitDetachedView(&smv);
  }
  // Setup smart pointer to multi-vector to copy view back out just before multi-vector is destroyed
  Teuchos::set_extra_data(
    // We create a duplicate of the RCP, otherwise the ref count does not go to zero.
    Teuchos::rcp(new CopyTpetraMultiVectorViewBack<Scalar,LocalOrdinal,GlobalOrdinal,Node>(Teuchos::rcpFromRef(*mv),raw_mv)),
    "CopyTpetraMultiVectorViewBack",
    Teuchos::outArg(mv),
    Teuchos::PRE_DESTROY
    );
  return mv;
}


template<class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
RCP<const MultiVectorBase<Scalar> >
TpetraVectorSpace<Scalar,LocalOrdinal,GlobalOrdinal,Node>::createCachedMembersView(
  const RTOpPack::ConstSubMultiVectorView<Scalar> &raw_mv ) const
{
#ifdef TEUCHOS_DEBUG
  TEUCHOS_TEST_FOR_EXCEPT( raw_mv.subDim() != this->dim() );
#endif
  // Create a multi-vector
  RCP< MultiVectorBase<Scalar> > mv;
  if (!tpetraMap_->isDistributed()) {
    if (tpetraMV_.is_null() || (tpetraMV_->getNumVectors() != size_t (raw_mv.numSubCols()))) {
      if (!tpetraMV_.is_null())
        // The MV is already allocated. If we are still using it, then very bad things can happen.
        TEUCHOS_TEST_FOR_EXCEPTION(Teuchos::get_extra_data<bool>(tpetraMV_,"inUse"),
                                   std::runtime_error,
                                   "Cannot use the cached vector simultaneously more than once.");
      using IST = typename Tpetra::MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node>::impl_scalar_type;
      using DT = typename Tpetra::MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node>::device_type;
      auto dv = ::Tpetra::Details::getStatic2dDualView<IST, DT> (tpetraMap_->getGlobalNumElements(), raw_mv.numSubCols());
      tpetraMV_ = Teuchos::rcp(new Tpetra::MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node>(tpetraMap_, dv));
      bool inUse = false;
      Teuchos::set_extra_data(inUse,"inUse",Teuchos::outArg(tpetraMV_));
    }

    if (tpetraDomainSpace_.is_null() || raw_mv.numSubCols() != tpetraDomainSpace_->localSubDim())
      tpetraDomainSpace_ = tpetraVectorSpace<Scalar>(Tpetra::createLocalMapWithNode<LocalOrdinal, GlobalOrdinal, Node>(raw_mv.numSubCols(), tpetraMap_->getComm()));

    mv = tpetraMultiVector<Scalar>(weakSelfPtr_.create_strong().getConst(), tpetraDomainSpace_, tpetraMV_);
  } else {
    mv = this->createMembers(raw_mv.numSubCols());
    bool inUse = false;
    RCP<Tpetra::MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node> > tmv = Teuchos::rcp_dynamic_cast<TpetraMultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node> >(mv,true)->getTpetraMultiVector();
    Teuchos::set_extra_data(inUse,"inUse",Teuchos::outArg(tmv));
  }
  // Copy values in raw_mv into multi-vector
  RTOpPack::SubMultiVectorView<Scalar> smv;
  mv->acquireDetachedView(Range1D(),Range1D(),&smv);
  RTOpPack::assign_entries<Scalar>(
    Ptr<const RTOpPack::SubMultiVectorView<Scalar> >(Teuchos::outArg(smv)),
    raw_mv );
  mv->commitDetachedView(&smv);
  return mv;
}


template <class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
bool TpetraVectorSpace<Scalar,LocalOrdinal,GlobalOrdinal,Node>::hasInCoreView(
  const Range1D& rng_in, const EViewType viewType, const EStrideType strideType
  ) const
{
  const Range1D rng = full_range(rng_in,0,this->dim()-1);
  const Ordinal l_localOffset = this->localOffset();

  const Ordinal myLocalSubDim = tpetraMap_.is_null () ?
    static_cast<Ordinal> (0) : tpetraMap_->getLocalNumElements ();

  return ( l_localOffset<=rng.lbound() && rng.ubound()<l_localOffset+myLocalSubDim );
}


template <class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
RCP< const VectorSpaceBase<Scalar> >
TpetraVectorSpace<Scalar,LocalOrdinal,GlobalOrdinal,Node>::clone() const
{
  return tpetraVectorSpace<Scalar>(tpetraMap_);
}

template <class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
RCP<const Tpetra::Map<LocalOrdinal,GlobalOrdinal,Node> >
TpetraVectorSpace<Scalar,LocalOrdinal,GlobalOrdinal,Node>::getTpetraMap() const
{
  return tpetraMap_;
}

// Overridden from SpmdVectorSpaceDefaultBase


template <class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
RCP<const Teuchos::Comm<Ordinal> >
TpetraVectorSpace<Scalar,LocalOrdinal,GlobalOrdinal,Node>::getComm() const
{
  return comm_;
}


template <class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
Ordinal TpetraVectorSpace<Scalar,LocalOrdinal,GlobalOrdinal,Node>::localSubDim() const
{
  return tpetraMap_.is_null () ? static_cast<Ordinal> (0) :
    static_cast<Ordinal> (tpetraMap_->getLocalNumElements ());
}

// private


template <class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
TpetraVectorSpace<Scalar,LocalOrdinal,GlobalOrdinal,Node>::TpetraVectorSpace()
{
  // The base classes should automatically default initialize to a safe
  // uninitialized state.
}


} // end namespace Thyra


#endif // THYRA_TPETRA_VECTOR_SPACE_HPP