Dune::MPIHelper Class Reference

A real mpi helper. More...

#include <dune/common/parallel/mpihelper.hh>

Public Types
typedef MPI_Comm	MPICommunicator
	The type of the mpi communicator.

Public Member Functions
int	rank () const
	return rank of process
int	size () const
	return number of processes
	~MPIHelper ()
	calls MPI_Finalize

Static Public Member Functions
static MPICommunicator	getCommunicator ()
	get the default communicator More...
static MPICommunicator	getLocalCommunicator ()
	get a local communicator More...
static Communication< MPICommunicator >	getCollectiveCommunication ()
static DUNE_EXPORT MPIHelper &	instance (int &argc, char **&argv)
	Get the singleton instance of the helper. More...

Static Public Attributes
static constexpr bool	isFake = false
	Are we fake (i. e. pretend to have MPI support but are compiled without.

Detailed Description

A real mpi helper.

This helper should be used for parallel programs.

Examples

recipe-integration.cc, and recipe-iterate-over-grid.cc.

Member Function Documentation

getCollectiveCommunication()

static Communication< MPICommunicator > Dune::MPIHelper::getCollectiveCommunication ( )

inlinestatic

Deprecated:

getCollectionCommunication is deprecated and will be removed after Dune 2.9.

Use getCommunication instead.

References getCommunicator().

getCommunicator()

static MPICommunicator Dune::MPIHelper::getCommunicator ( )

inlinestatic

get the default communicator

Return a communicator to exchange data with all processes

Returns

MPI_COMM_WORLD

Referenced by getCollectiveCommunication().

getLocalCommunicator()

static MPICommunicator Dune::MPIHelper::getLocalCommunicator ( )

inlinestatic

get a local communicator

Returns a communicator to exchange data with the local process only

Returns

MPI_COMM_SELF

Referenced by Dune::GridFactoryInterface< GridType >::comm().

instance()

static DUNE_EXPORT MPIHelper & Dune::MPIHelper::instance ( int &  argc, char **&  argv  )

inlinestatic

Get the singleton instance of the helper.

This method has to be called with the same arguments that the main method of the program was called:

int main(int argc, char** argv){
  MPIHelper::instance(argc, argv);
  // program code comes here
  ...
}

Parameters

argc	The number of arguments provided to main.
argv	The arguments provided to main.

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

• dune/common/parallel/mpihelper.hh