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MPI_Type_create_indexed_block(3) man page (version 5.0.0rc2)

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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

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.

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


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