libtrilinos-muelu-dev 12.4.2-2 / usr / include / trilinos / MueLu_SingleLevelFactoryBase.hpp

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

#include "MueLu_ConfigDefs.hpp"

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

namespace MueLu {

  /*!
    @class SingleLevelFactoryBase
    @brief Base class for factories that use one level (currentLevel).

    @ingroup MueLuBaseClasses
  */
  class SingleLevelFactoryBase : public Factory {

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

    //! Constructor.
    SingleLevelFactoryBase() { }

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

    //@}

    //! @name 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 &currentLevel) const = 0;

    //@}

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

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

    //!
    virtual void CallBuild(Level& requestedLevel) const {
#ifdef HAVE_MUELU_DEBUG
      // We cannot call Build method twice for the same level, but we can call it multiple times for different levels
      int levelID = requestedLevel.GetLevelID();
      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

      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);

#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);
    }

    //!
    virtual void CallDeclareInput(Level & requestedLevel) const {
      DeclareInput(requestedLevel);
    }
    //@}

  }; //class SingleLevelFactoryBase

} //namespace MueLu

#define MUELU_SINGLELEVELFACTORY_SHORT
#endif //ifndef MUELU_SINGLELEVELFACTORY_HPP

//TODO: code factorization between SingleLevelFactoryBase and TwoLevelFactoryBase