Creates an indexed datatype with offsets in bytes


#include "mpi.h"
int MPI_Type_hindexed( 
        int count, 
        int blocklens[], 
        MPI_Aint indices[], 
        MPI_Datatype old_type, 
        MPI_Datatype *newtype )

Input Parameters

count number of blocks -- also number of entries in indices and blocklens
blocklens number of elements in each block (array of nonnegative integers)
indices byte displacement of each block (array of MPI_Aint)
old_type old datatype (handle)

Output Parameter

new datatype (handle)

Notes for Fortran

All MPI routines in Fortran (except for MPI_WTIME and MPI_WTICK) have an additional argument ierr at the end of the argument list. ierr is an integer and has the same meaning as the return value of the routine in C. In Fortran, MPI routines are subroutines, and are invoked with the call statement.

All MPI objects (e.g., MPI_Datatype, MPI_Comm) are of type INTEGER in Fortran.

Also see the discussion for MPI_Type_indexed about the indices in Fortran.


All MPI routines (except MPI_Wtime and MPI_Wtick) return an error value; C routines as the value of the function and Fortran routines in the last argument. Before the value is returned, the current MPI error handler is called. By default, this error handler aborts the MPI job. The error handler may be changed with MPI_Errhandler_set; the predefined error handler MPI_ERRORS_RETURN may be used to cause error values to be returned. Note that MPI does not guarentee that an MPI program can continue past an error.

No error; MPI routine completed successfully.
Invalid datatype argument. May be an uncommitted MPI_Datatype (see MPI_Type_commit).
Invalid count argument. Count arguments must be non-negative; a count of zero is often valid.
This error is returned when some part of the MPICH implementation is unable to acquire memory.
Invalid argument. Some argument is invalid and is not identified by a specific error class (e.g., MPI_ERR_RANK).