MPI_Type_create_indexed_block(3)

NAME
MPI_Type_create_indexed_block, MPI_Type_create_hindexed_block - Creates an indexed data type with the same block length for all blocks.

SYNTAX

C Syntax
#include <mpi.h>
int MPI_Type_create_indexed_block(int count, int blocklength, const int array_of_displacements[], MPI_Datatype oldtype, MPI_Datatype *newtype)
int MPI_Type_create_hindexed_block(int count, int blocklength, const MPI_Aint array_of_displacements[], MPI_Datatype oldtype, MPI_Datatype *newtype)

Fortran Syntax
USE MPI
! or the older form: INCLUDE 'mpif.h'
MPI_TYPE_CREATE_INDEXED_BLOCK(COUNT, BLOCKLENGTH,
		ARRAY_OF_DISPLACEMENTS, OLDTYPE, NEWTYPE, IERROR)
	INTEGER	COUNT, BLOCKLENGTH, ARRAY_OF_DISPLACEMENTS(*),
	        OLDTYPE, NEWTYPE, IERROR
MPI_TYPE_CREATE_HINDEXED_BLOCK(COUNT, BLOCKLENGTH,
		ARRAY_OF_DISPLACEMENTS, OLDTYPE, NEWTYPE, IERROR)
	INTEGER	COUNT, BLOCKLENGTH, OLDTYPE, NEWTYPE
	INTEGER(KIND=MPI_ADDRESS_KIND) ARRAY_OF_DISPLACEMENTS(*)
	INTEGER	IERROR

Fortran 2008 Syntax
USE mpi_f08 MPI_Type_create_indexed_block(count, blocklength, array_of_displacements,
        oldtype, newtype, ierror)
    INTEGER, INTENT(IN) :: count, blocklength,
    array_of_displacements(count)
    TYPE(MPI_Datatype), INTENT(IN) :: oldtype
    TYPE(MPI_Datatype), INTENT(OUT) :: newtype
    INTEGER, OPTIONAL, INTENT(OUT) :: ierror MPI_Type_create_hindexed_block(count, blocklength, array_of_displacements,
        oldtype, newtype, ierror)
    INTEGER, INTENT(IN) :: count, blocklength
    INTEGER(KIND=MPI_ADDRESS_KIND), INTENT(IN) ::
    array_of_displacements(count)
    TYPE(MPI_Datatype), INTENT(IN) :: oldtype
    TYPE(MPI_Datatype), INTENT(OUT) :: newtype
    INTEGER, OPTIONAL, INTENT(OUT) :: ierror

C++ Syntax
#include <mpi.h>
MPI::Datatype MPI::Datatype::Create_indexed_block( int count,
	int blocklength, const int array_of_displacements[]) const
MPI::Datatype MPI::Datatype::Create_hindexed_block( int count,
	int blocklength, const int array_of_displacements[]) const

INPUT PARAMETERS

count
    Length of array of displacements (integer).

blocklength
    Size of block (integer).

array_of_displacements
    Array of displacements (array of integers). In units of the extent of oldtype for MPI_Type_create_indexed_block and bytes for MPI_Type_create_hindexed_block.

oldtype
    Old data type (handle).

OUTPUT PARAMETERS

newtype
    New data type (handle).

IERROR
    Fortran only: Error status (integer).

DESCRIPTION
MPI_Type_create_indexed_block and MPI_Type_create_hindexed_block create an indexed data type with the same block length for all blocks. The only difference between the two functions is MPI_Type_create_indexed_block takes an array of displacements in units of the extent of oldtype while MPI_Type_create_hindexed_block takes displacements in bytes.

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.

SEE ALSO

MPI_Type_indexed