/usr/include/trilinos/MueLu_TwoLevelFactoryBase.hpp

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//        MueLu: A package for multigrid based preconditioning
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#ifndef MUELU_TWOLEVELFACTORY_HPP
#define MUELU_TWOLEVELFACTORY_HPP

#include "MueLu_ConfigDefs.hpp"

#include "MueLu_Factory.hpp"
#include "MueLu_Level.hpp"
#include "MueLu_TimeMonitor.hpp"
#include "MueLu_Utilities.hpp"

namespace MueLu {

  /*!
    @class TwoLevelFactoryBase class.
    @brief Base class for factories that use two levels (fineLevel and coarseLevel).

    Examples of such factories are R, P, and A_coarse.

    @ingroup MueLuBaseClasses
  */

  class TwoLevelFactoryBase : public Factory {

  public:

    //! @name Constructors/Destructors.
    //@{

    //! Constructor.
    TwoLevelFactoryBase() { }

    //! Destructor.
    virtual ~TwoLevelFactoryBase()
    { }

    //@}

    //! Input
    //@{

    /*! @brief Specifies the data that this class needs, and the factories that generate that data.

        If the Build method of this class requires some data, but the generating factory is not specified in DeclareInput, then this class
        will fall back to the settings in FactoryManager.
    */
    virtual void DeclareInput(Level &fineLevel, Level &coarseLevel) const = 0;

    //!
    virtual void CallDeclareInput(Level & requestedLevel) const {
      if (requestedLevel.GetPreviousLevel() == Teuchos::null) {
        std::ostringstream errStr;
        errStr << "LevelID = " << requestedLevel.GetLevelID();
        throw Exceptions::DependencyError(errStr.str());
      }
      DeclareInput(*requestedLevel.GetPreviousLevel(), requestedLevel);
    }

    //@}

    //! @name Build methods.
    //@{


    //! Build an object with this factory.
    virtual void Build(Level & fineLevel, Level & coarseLevel) const = 0;

    //!
    virtual void CallBuild(Level& requestedLevel) const {
      int levelID = requestedLevel.GetLevelID();

#ifdef HAVE_MUELU_DEBUG
      // We cannot call Build method twice for the same level, but we can call it multiple times for different levels
      TEUCHOS_TEST_FOR_EXCEPTION((multipleCallCheck_ == ENABLED) && (multipleCallCheckGlobal_ == ENABLED) && (lastLevelID_ == levelID),
                                 Exceptions::RuntimeError,
                                 this->ShortClassName() << "::Build() called twice for the same level (levelID=" << levelID
                                 << "). This is likely due to a configuration error, or calling hierarchy setup multiple times "
                                 << "without resetting debug info through FactoryManager::ResetDebugData().");
      if (multipleCallCheck_ == FIRSTCALL)
        multipleCallCheck_ = ENABLED;

      lastLevelID_ = levelID;
#endif
      TEUCHOS_TEST_FOR_EXCEPTION(requestedLevel.GetPreviousLevel() == Teuchos::null, Exceptions::RuntimeError, "LevelID = " << levelID);

      RCP<const Teuchos::Comm<int> > comm = requestedLevel.GetComm();
      if (comm.is_null()) {
        // Some factories are called before we constructed Ac, and therefore,
        // before we set the level communicator. For such factories we can get
        // the comm from the previous level, as all processes go there
        RCP<Level>& prevLevel = requestedLevel.GetPreviousLevel();
        if (!prevLevel.is_null())
          comm = prevLevel->GetComm();
      }

      int oldRank = -1;
      if (!comm.is_null())
        oldRank = SetProcRankVerbose(comm->getRank());

#ifdef HAVE_MUELU_TIMER_SYNCHRONIZATION
      // Synchronization timer
      std::string syncTimer = this->ShortClassName() + ": Build sync (level=" + toString(requestedLevel.GetLevelID()) + ")";
      if (!comm.is_null()) {
        TimeMonitor timer(*this, syncTimer);
        comm->barrier();
      }
#endif

      Build(*requestedLevel.GetPreviousLevel(), requestedLevel);

#ifdef HAVE_MUELU_TIMER_SYNCHRONIZATION
      // Synchronization timer
      if (!comm.is_null()) {
        TimeMonitor timer(*this, syncTimer);
        comm->barrier();
      }
#endif

      GetOStream(Test) << *RemoveFactoriesFromList(GetParameterList()) << std::endl;

      if (oldRank != -1)
        SetProcRankVerbose(oldRank);
    }

    //@}

  }; //class TwoLevelFactoryBase


} //namespace MueLu

#define MUELU_TWOLEVELFACTORY_SHORT
#endif //ifndef MUELU_TWOLEVELFACTORY_HPP
libtrilinos-muelu-dev 12.4.2-2 / usr / include / trilinos / MueLu_TwoLevelFactoryBase.hpp
