vertexhandles.hh

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#ifndef DUMUX_VERTEX_HANDLES_HH
#define DUMUX_VERTEX_HANDLES_HH
 
#include <dune/grid/common/datahandleif.hh>
 
 
namespace Dumux {
 
template <class FieldType, class Container, class VertexMapper>
class VertexHandleSum
    : public Dune::CommDataHandleIF< VertexHandleSum<FieldType, Container, VertexMapper>,
                                     FieldType >
{
public:
    VertexHandleSum(Container &container,
                    const VertexMapper &mapper)
        : mapper_(mapper)
        , container_(container)
    { };
 
    bool contains(int dim, int codim) const
    {
        // only communicate vertices
        return codim == dim;
    }
 
    bool fixedsize(int dim, int codim) const
    {
        // for each vertex we communicate a single field vector which
        // has a fixed size
        return true;
    }
 
    template<class EntityType>
    size_t size (const EntityType &e) const
    {
        // communicate a field type per entity
        return 1;
    }
 
    template<class MessageBufferImp, class EntityType>
    void gather(MessageBufferImp &buff, const EntityType &e) const
    {
        int vIdx = mapper_.index(e);
        buff.write(container_[vIdx]);
    }
 
    template<class MessageBufferImp, class EntityType>
    void scatter(MessageBufferImp &buff, const EntityType &e, size_t n)
    {
        int vIdx = mapper_.index(e);
 
        FieldType tmp;
        buff.read(tmp);
        container_[vIdx] += tmp;
    }
 
private:
    const VertexMapper &mapper_;
    Container &container_;
};
 
template <class FieldType, class Container, class VertexMapper>
class VertexHandleMax
    : public Dune::CommDataHandleIF< VertexHandleMax<FieldType, Container, VertexMapper>,
                                     FieldType >
{
public:
    VertexHandleMax(Container &container,
                    const VertexMapper &mapper)
        : mapper_(mapper)
        , container_(container)
    { };
 
    bool contains(int dim, int codim) const
    {
        // only communicate vertices
        return codim == dim;
    }
 
    bool fixedsize(int dim, int codim) const
    {
        // for each vertex we communicate a single field vector which
        // has a fixed size
        return true;
    }
 
    template<class EntityType>
    size_t size (const EntityType &e) const
    {
        // communicate a field type per entity
        return 1;
    }
 
    template<class MessageBufferImp, class EntityType>
    void gather(MessageBufferImp &buff, const EntityType &e) const
    {
        int vIdx = mapper_.index(e);
        buff.write(container_[vIdx]);
    }
 
    template<class MessageBufferImp, class EntityType>
    void scatter(MessageBufferImp &buff, const EntityType &e, size_t n)
    {
        int vIdx = mapper_.index(e);
 
        FieldType tmp;
        buff.read(tmp);
        using std::max;
        container_[vIdx] = max(container_[vIdx], tmp);
    }
 
private:
    const VertexMapper &mapper_;
    Container &container_;
};
 
 
template <class FieldType, class Container, class VertexMapper>
class VertexHandleMin
    : public Dune::CommDataHandleIF< VertexHandleMin<FieldType, Container, VertexMapper>,
                                     FieldType >
{
public:
    VertexHandleMin(Container &container,
                    const VertexMapper &mapper)
        : mapper_(mapper)
        , container_(container)
    { };
 
    bool contains(int dim, int codim) const
    {
        // only communicate vertices
        return codim == dim;
    }
 
    bool fixedsize(int dim, int codim) const
    {
        // for each vertex we communicate a single field vector which
        // has a fixed size
        return true;
    }
 
    template<class EntityType>
    size_t size (const EntityType &e) const
    {
        // communicate a field type per entity
        return 1;
    }
 
    template<class MessageBufferImp, class EntityType>
    void gather(MessageBufferImp &buff, const EntityType &e) const
    {
        int vIdx = mapper_.index(e);
        buff.write(container_[vIdx]);
    }
 
    template<class MessageBufferImp, class EntityType>
    void scatter(MessageBufferImp &buff, const EntityType &e, size_t n)
    {
        int vIdx = mapper_.index(e);
        FieldType tmp;
        buff.read(tmp);
        using std::min;
        container_[vIdx] = min(container_[vIdx], tmp);
    }
 
private:
    const VertexMapper &mapper_;
    Container &container_;
};
 
} // end namespace Dumux
 
#endif