Class containing wrappers to MPI. More...

#include <Communicator.h>

Inheritance diagram for PLMD::Communicator:

Classes
struct	ConstData
	Const version of Communicator::Data See Communicator::Data documentation. More...

struct	Data
	Structure defining a buffer for MPI. More...

class	Request
	Wrapper class for MPI_Request. More...

class	Status
	Wrapper class for MPI_Status. More...

Public Member Functions
	Communicator ()
	Default constructor. More...

	Communicator (const Communicator &)
	Copy constructor. More...

Communicator &	operator= (const Communicator &)
	Assignment operator. More...

virtual	~Communicator ()
	Destructor. More...

int	Get_rank () const
	Obtain the rank of the present process. More...

int	Get_size () const
	Obtain the number of processes. More...

void	Set_comm (MPI_Comm comm)
	Set from a real MPI communicator. More...

MPI_Comm &	Get_comm ()
	Reference to MPI communicator. More...

void	Set_comm (void *comm)
	Set from a pointer to a real MPI communicator (C). More...

void	Set_fcomm (void *comm)
	Set from a pointer to a real MPI communicator (FORTRAN). More...

void	Abort (int code)
	Wrapper to MPI_Abort. More...

void	Barrier () const
	Wrapper to MPI_Barrier. More...

void	Sum (Data)
	Wrapper for MPI_Allreduce with MPI_SUM (data struct) More...

template<class T >
void	Sum (T *buf, int count)
	Wrapper for MPI_Allreduce with MPI_SUM (pointer) More...

template<class T >
void	Sum (T &buf)
	Wrapper for MPI_Allreduce with MPI_SUM (reference) More...

void	Bcast (Data, int)
	Wrapper for MPI_Bcast (data struct) More...

template<class T >
void	Bcast (T *buf, int count, int root)
	Wrapper for MPI_Bcast (pointer) More...

template<class T >
void	Bcast (T &buf, int root)
	Wrapper for MPI_Bcast (reference) More...

Request	Isend (ConstData, int, int)
	Wrapper for MPI_Isend (data struct) More...

template<class T >
Request	Isend (const T *buf, int count, int source, int tag)
	Wrapper for MPI_Isend (pointer) More...

template<class T >
Request	Isend (const T &buf, int source, int tag)
	Wrapper for MPI_Isend (reference) More...

void	Allgatherv (ConstData in, Data out, const int , const int )
	Wrapper for MPI_Allgatherv (data struct) More...

template<class T , class S >
void	Allgatherv (const T sendbuf, int sendcount, S recvbuf, const int recvcounts, const int displs)
	Wrapper for MPI_Allgatherv (pointer) More...

template<class T , class S >
void	Allgatherv (const T &sendbuf, S &recvbuf, const int recvcounts, const int displs)
	Wrapper for MPI_Allgatherv (reference) More...

void	Allgather (ConstData in, Data out)
	Wrapper for MPI_Allgather (data struct) More...

template<class T , class S >
void	Allgather (const T sendbuf, int sendcount, S recvbuf, int recvcount)
	Wrapper for MPI_Allgatherv (pointer) More...

template<class T , class S >
void	Allgather (const T &sendbuf, S &recvbuf)
	Wrapper for MPI_Allgatherv (reference) More...

void	Recv (Data, int, int, Status &s=StatusIgnore)
	Wrapper for MPI_Recv (data struct) More...

template<class T >
void	Recv (T *buf, int count, int source, int tag, Status &s=StatusIgnore)
	Wrapper for MPI_Recv (pointer) More...

template<class T >
void	Recv (T &buf, int source, int tag, Status &s=StatusIgnore)
	Wrapper for MPI_Recv (reference) More...

void	Split (int, int, Communicator &) const
	Wrapper to MPI_Comm_split. More...

Static Public Member Functions
static bool	initialized ()
	Tests if MPI library is initialized. More...

static Communicator &	Get_world ()
	Returns MPI_COMM_WORLD if MPI is initialized, otherwise the default communicator. More...

Static Public Attributes
static Status	StatusIgnore
	Special status used when status should be ignored. More...

Private Member Functions
template<>
MPI_Datatype	getMPIType ()

template<>
MPI_Datatype	getMPIType ()

template<>
MPI_Datatype	getMPIType ()

template<>
MPI_Datatype	getMPIType ()

template<>
MPI_Datatype	getMPIType ()

template<>
MPI_Datatype	getMPIType ()

Static Private Member Functions
template<class T >
static MPI_Datatype	getMPIType ()
	Function returning the MPI type. More...

Private Attributes
MPI_Comm	communicator
	Communicator. More...

Detailed Description

Class containing wrappers to MPI.

All the MPI related stuff is relegated here.

Constructor & Destructor Documentation

◆ Communicator() [1/2]

PLMD::Communicator::Communicator ( )

Default constructor.

◆ Communicator() [2/2]

PLMD::Communicator::Communicator ( const Communicator & pc )

Copy constructor.

It effectively "clones" the communicator, providing a new one acting on the same group

◆ ~Communicator()

PLMD::Communicator::~Communicator ( )

virtual

Destructor.

Member Function Documentation

◆ Abort()

void PLMD::Communicator::Abort ( int code )

Wrapper to MPI_Abort.

Parameters

code	Error code

◆ Allgather() [1/3]

void PLMD::Communicator::Allgather	(	ConstData	in,
		Data	out
	)

Wrapper for MPI_Allgather (data struct)

◆ Allgather() [2/3]

template<class T , class S >

void PLMD::Communicator::Allgather	(	const T *	sendbuf,
		int	sendcount,
		S *	recvbuf,
		int	recvcount
	)

inline

Wrapper for MPI_Allgatherv (pointer)

◆ Allgather() [3/3]

template<class T , class S >

void PLMD::Communicator::Allgather	(	const T &	sendbuf,
		S &	recvbuf
	)

inline

Wrapper for MPI_Allgatherv (reference)

◆ Allgatherv() [1/3]

void PLMD::Communicator::Allgatherv	(	ConstData	in,
		Data	out,
		const int *	recvcounts,
		const int *	displs
	)

Wrapper for MPI_Allgatherv (data struct)

◆ Allgatherv() [2/3]

template<class T , class S >

void PLMD::Communicator::Allgatherv	(	const T *	sendbuf,
		int	sendcount,
		S *	recvbuf,
		const int *	recvcounts,
		const int *	displs
	)

inline

Wrapper for MPI_Allgatherv (pointer)

◆ Allgatherv() [3/3]

template<class T , class S >

void PLMD::Communicator::Allgatherv	(	const T &	sendbuf,
		S &	recvbuf,
		const int *	recvcounts,
		const int *	displs
	)

inline

Wrapper for MPI_Allgatherv (reference)

◆ Barrier()

void PLMD::Communicator::Barrier ( ) const

Wrapper to MPI_Barrier.

◆ Bcast() [1/3]

void PLMD::Communicator::Bcast	(	Data	data,
		int	root
	)

Wrapper for MPI_Bcast (data struct)

◆ Bcast() [2/3]

template<class T >

void PLMD::Communicator::Bcast	(	T *	buf,
		int	count,
		int	root
	)

inline

Wrapper for MPI_Bcast (pointer)

◆ Bcast() [3/3]

template<class T >

void PLMD::Communicator::Bcast	(	T &	buf,
		int	root
	)

inline

Wrapper for MPI_Bcast (reference)

◆ Get_comm()

MPI_Comm & PLMD::Communicator::Get_comm ( )

Reference to MPI communicator.

◆ Get_rank()

int PLMD::Communicator::Get_rank ( ) const

Obtain the rank of the present process.

◆ Get_size()

int PLMD::Communicator::Get_size ( ) const

Obtain the number of processes.

◆ Get_world()

Communicator & PLMD::Communicator::Get_world ( )

static

Returns MPI_COMM_WORLD if MPI is initialized, otherwise the default communicator.

◆ getMPIType() [1/7]

template<class T >

static MPI_Datatype PLMD::Communicator::getMPIType ( )

staticprivate

Function returning the MPI type.

You can use it to access to the MPI type of a C++ type, e.g. MPI_Datatype type=getMPIType<double>();