MPI_Type_size.openmpi: Returns the number of bytes occupied by entries in a data type.

SYNTAX

C Syntax

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

Fortran Syntax

INCLUDE 'mpif.h'
MPI_TYPE_SIZE(DATATYPE, SIZE, IERROR)
	INTEGER	DATATYPE, SIZE, IERROR

C++ Syntax

#include <mpi.h>
int Datatype::Get_size() const

INPUT PARAMETER

datatype: Datatype (handle).

OUTPUT PARAMETERS

size: Datatype size (integer).
IERROR: Fortran only: Error status (integer).

DESCRIPTION

MPI_Type_size returns the total size, in bytes, of the entries in the type signature associated with datatype; i.e., the total size of the data in a message that would be created with this datatype. Entries that occur multiple times in the datatype are counted with their multiplicity.

ERRORS

Almost all MPI routines return an error value; C routines as the value of the function and Fortran routines in the last argument. C++ functions do not return errors. If the default error handler is set to MPI::ERRORS_THROW_EXCEPTIONS, then on error the C++ exception mechanism will be used to throw an MPI:Exception object.

Before the error value is returned, the current MPI error handler is called. By default, this error handler aborts the MPI job, except for I/O function errors. The error handler may be changed with MPI_Comm_set_errhandler; the predefined error handler MPI_ERRORS_RETURN may be used to cause error values to be returned. Note that MPI does not guarantee that an MPI program can continue past an error.

MPI_Type_size.openmpi (3)