Dune::FakeMPIHelper Class Reference

A fake mpi helper. More...

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

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

Public Member Functions
int	rank () const
	return rank of process, i.e. zero
int	size () const
	return rank of process, i.e. one

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

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

Detailed Description

A fake mpi helper.

This helper can be used if no MPI is available or one wants to run sequentially even if MPI is available and used.

Member Typedef Documentation

MPICommunicator

typedef No_Comm Dune::FakeMPIHelper::MPICommunicator

The type of the mpi communicator.

Member Function Documentation

getCollectiveCommunication()

Communication< MPICommunicator > Dune::FakeMPIHelper::getCollectiveCommunication ( )

inlinestatic

Deprecated

getCollectionCommunication is deprecated and will be removed after Dune 2.9.

Use getCommunication instead.

getCommunication()

Communication< MPICommunicator > Dune::FakeMPIHelper::getCommunication ( )

inlinestatic

getCommunicator()

DUNE_EXPORT MPICommunicator Dune::FakeMPIHelper::getCommunicator ( )

inlinestatic

get the default communicator

Return a communicator to exchange data with all processes

Returns

a fake communicator

getLocalCommunicator()

MPICommunicator Dune::FakeMPIHelper::getLocalCommunicator ( )

inlinestatic

get a local communicator

Returns a communicator to communicate with the local process only

Returns

a fake communicator

instance() [1/2]

DUNE_EXPORT FakeMPIHelper & Dune::FakeMPIHelper::instance ( )

inlinestatic

instance() [2/2]

DUNE_EXPORT FakeMPIHelper & Dune::FakeMPIHelper::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.

rank()

int Dune::FakeMPIHelper::rank ( ) const

inline

return rank of process, i.e. zero

size()

int Dune::FakeMPIHelper::size ( ) const

inline

return rank of process, i.e. one

Member Data Documentation

isFake

bool Dune::FakeMPIHelper::isFake = true

staticconstexpr

Are we fake (i.e. pretend to have MPI support but are compiled without.).

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

• mpihelper.hh