managedvectorfunction.hh

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#ifndef DUNE_FEM_MANAGEDVECTORFUNCTION_HH
#define DUNE_FEM_MANAGEDVECTORFUNCTION_HH
 
#include <memory>
#include <string>
 
#include <dune/fem/function/vectorfunction/vectorfunction.hh>
#include <dune/fem/space/common/dofmanager.hh>
#include <dune/fem/space/mapper/nonblockmapper.hh>
 
namespace Dune
{
 
  namespace Fem
  {
 
    // MemObject
    // ---------
 
    struct MemObject
    {
      template< class DofContainer, class DiscreteFunctionSpace >
      DofContainer &allocate ( const DiscreteFunctionSpace &space )
      {
        typedef MutableBlockVector< DofContainer, DiscreteFunctionSpace::localBlockSize > DofVector;
        auto result = allocateManagedDofStorage( space.gridPart().grid(), space.blockMapper(), static_cast< DofVector * >( nullptr ) );
        interface_.reset( result.first );
        return result.second->array();
      }
 
      void enableDofCompression ()
      {
        if( interface_ )
          interface_->enableDofCompression();
      }
 
    private:
      std::unique_ptr< DofStorageInterface > interface_;
    };
 
 
 
 
    // ManagedDiscreteFunction
    // -----------------------
 
    template< class DiscreteFunctionSpace,
              class Vector >
    class ManagedDiscreteFunction
      < VectorDiscreteFunction< DiscreteFunctionSpace, Vector > >
      : private MemObject,
        public VectorDiscreteFunction< DiscreteFunctionSpace, Vector >
    {
      typedef VectorDiscreteFunction< DiscreteFunctionSpace, Vector > BaseType;
      typedef ManagedDiscreteFunction< BaseType > ThisType;
 
    public:
      typedef ThisType DiscreteFunctionType;
 
      typedef typename BaseType :: DiscreteFunctionSpaceType DiscreteFunctionSpaceType;
      typedef typename BaseType :: DofVectorType    DofVectorType;
      typedef typename BaseType :: DofContainerType DofContainerType;
 
      typedef typename DiscreteFunctionSpaceType :: GridPartType :: GridType GridType;
 
      using BaseType :: name;
 
      ManagedDiscreteFunction ( const std::string &name, const DiscreteFunctionSpaceType &dfSpace )
        : BaseType( name, dfSpace, MemObject::allocate< DofContainerType >( dfSpace ) )
      {}
 
      explicit ManagedDiscreteFunction ( const BaseType &other )
        : BaseType( other.name(), other.space(), MemObject::allocate< DofContainerType >( other.space() ) )
      {
        BaseType :: assign ( other );
      }
 
      ManagedDiscreteFunction ( const ThisType &other )
        : BaseType( other.name(), other.space(), MemObject::allocate< DofContainerType >( other.space() ) )
      {
        BaseType :: assign ( other );
      }
 
      ManagedDiscreteFunction ( ThisType && ) = default;
 
      void enableDofCompression () { MemObject::enableDofCompression(); }
    };
 
  } // namespace Fem
 
} // namespace Dune
 
#endif // #ifndef DUNE_FEM_MANAGEDVECTORFUNCTION_HH