MPI_TYPE_SIZE, MPI_Type_size

Purpose

Returns the number of bytes represented by any defined datatype.

C synopsis

#include <mpi.h>
int MPI_Type_size(MPI_Datatype datatype,int *size);

C++ synopsis

#include mpi.h
int MPI::Datatype::Get_size() const;

FORTRAN synopsis

include 'mpif.h' or use mpi
MPI_TYPE_SIZE(INTEGER DATATYPE,INTEGER SIZE,INTEGER IERROR)

Parameters

datatype
     is the datatype (handle) (IN)

size
     is the datatype size (integer) (OUT)

IERROR
     is the FORTRAN return code. It is always the last argument.

Description

This subroutine returns the total number of bytes in the type signature
associated with datatype. Entries with multiple occurrences in the datatype
are counted.

Notes

This function must be used with some care in 64-bit applications because
size is an integer and could be subject to overflow.

Errors

Invalid datatype

MPI not initialized

MPI already finalized

Related information