Dune::CommDataHandleIF< DataHandleImp, DataTypeImp > Class Template Reference

CommDataHandleIF describes the features of a data handle for communication in parallel runs using the Grid::communicate methods. Here the Barton-Nackman trick is used to interpret data handle objects as its interface. Therefore usable data handle classes need to be derived from this class. More...

#include <dune/grid/common/datahandleif.hh>

Public Types
typedef DataTypeImp	DataType
	data type of data to communicate

Public Member Functions
bool	contains (int dim, int codim) const
	returns true if data for given valid codim should be communicated More...
bool	fixedSize (int dim, int codim) const
	returns true if size of data per entity of given dim and codim is a constant More...
template<class EntityType >
size_t	size (const EntityType &e) const
	how many objects of type DataType have to be sent for a given entity More...
template<class MessageBufferImp , class EntityType >
void	gather (MessageBufferImp &buff, const EntityType &e) const
	pack data from user to message buffer More...
template<class MessageBufferImp , class EntityType >
void	scatter (MessageBufferImp &buff, const EntityType &e, size_t n)
	unpack data from message buffer to user. More...

Detailed Description

template<class DataHandleImp, class DataTypeImp>
class Dune::CommDataHandleIF< DataHandleImp, DataTypeImp >

CommDataHandleIF describes the features of a data handle for communication in parallel runs using the Grid::communicate methods. Here the Barton-Nackman trick is used to interpret data handle objects as its interface. Therefore usable data handle classes need to be derived from this class.

Template Parameters

DataHandleImp	implementation of the users data handle
DataTypeImp	type of data that are going to be communicated which is exported as DataType (for example double)

Member Function Documentation

contains()

template<class DataHandleImp , class DataTypeImp >

bool Dune::CommDataHandleIF< DataHandleImp, DataTypeImp >::contains ( int  dim, int  codim  ) const

inline

returns true if data for given valid codim should be communicated

Parameters

dim	valid dimension (i.e. the grids dimension)
codim	valid codimension of the entity set for which data should be communicated

fixedSize()

template<class DataHandleImp , class DataTypeImp >

bool Dune::CommDataHandleIF< DataHandleImp, DataTypeImp >::fixedSize ( int  dim, int  codim  ) const

inline

returns true if size of data per entity of given dim and codim is a constant

Parameters

dim	valid dimension (i.e. the grids dimension)
codim	valid codimension of the entity set for which data should be communicated

This method calls 'fixedSize' of the derived class.

gather()

template<class DataHandleImp , class DataTypeImp >

template<class MessageBufferImp , class EntityType >

void Dune::CommDataHandleIF< DataHandleImp, DataTypeImp >::gather ( MessageBufferImp &  buff, const EntityType &  e  ) const

inline

pack data from user to message buffer

Parameters

buff	message buffer provided by the grid
e	entity for which date should be packed to buffer

References CHECK_AND_CALL_INTERFACE_IMPLEMENTATION, and Dune::CommDataHandleIF< DataHandleImp, DataTypeImp >::gather().

Referenced by Dune::CommDataHandleIF< DataHandleImp, DataTypeImp >::gather().

scatter()

template<class DataHandleImp , class DataTypeImp >

template<class MessageBufferImp , class EntityType >

void Dune::CommDataHandleIF< DataHandleImp, DataTypeImp >::scatter ( MessageBufferImp &  buff, const EntityType &  e, size_t  n  )

inline

unpack data from message buffer to user.

Parameters

buff	message buffer provided by the grid. This is not const, because the buffer has an internal iterator that gets advanced when reading from the buffer.
e	entity for which date should be unpacked from buffer
n	number of data written to buffer for this entity before

References CHECK_AND_CALL_INTERFACE_IMPLEMENTATION, and Dune::CommDataHandleIF< DataHandleImp, DataTypeImp >::scatter().

Referenced by Dune::CommDataHandleIF< DataHandleImp, DataTypeImp >::scatter().

size()

template<class DataHandleImp , class DataTypeImp >

template<class EntityType >

size_t Dune::CommDataHandleIF< DataHandleImp, DataTypeImp >::size ( const EntityType &  e ) const

inline

how many objects of type DataType have to be sent for a given entity

Note

Only the sender side needs to know this size.

Parameters

e	entity for which the size should be determined

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The documentation for this class was generated from the following file:

• dune/grid/common/datahandleif.hh