MPI_Type_hindexed.openmpi (3)

#include <mpi.h>
int MPI_Type_hindexed(int count, int *array_of_blocklengths,
	MPI_Aint *array_of_displacements, MPI_Datatype oldtype,
	MPI_Datatype *newtype)

INCLUDE 'mpif.h'
MPI_TYPE_HINDEXED(COUNT, ARRAY_OF_BLOCKLENGTHS,
		ARRAY_OF_DISPLACEMENTS, OLDTYPE, NEWTYPE, IERROR)
	INTEGER	COUNT, ARRAY_OF_BLOCKLENGTHS(*)
	INTEGER	ARRAY_OF_DISPLACEMENTS(*), OLDTYPE, NEWTYPE
	INTEGER	IERROR

count

Number of blocks -- also number of entries in array_of_displacements and array_of_blocklengths (integer).

array_of_blocklengths

Number of elements in each block (array of nonnegative integers).

array_of_displacements

Byte displacement of each block (array of integer).

oldtype

Old datatype (handle).

newtype

New datatype (handle).

IERROR

Fortran only: Error status (integer).

Note that use of this routine is deprecated as of MPI-2. Use MPI_Type_create_hindexed instead.

This deprecated routine is not available in C++.

The function is identical to MPI_Type_indexed, except that block displacements in array_of_displacements are specified in bytes, rather than in multiples of the oldtype extent.

Assume that oldtype has type map

    {(type(0), disp(0)), ..., (type(n-1), disp(n-1))},

with extent ex. Let B be the array_of_blocklength argument and D be the array_of_displacements argument. The newly created datatype has

n x S^count-1
    (i=0)        B[i]  entries:

  {(type(0), disp(0) + D[0]),...,(type(n-1), disp(n-1) + D[0]),...,
  (type(0), disp(0) + (D[0] + B[0]-1)* ex),...,
  type(n-1), disp(n-1) + (D[0]+ B[0]-1)* ex),...,
  (type(0), disp(0) + D[count-1]),...,(type(n-1), disp(n-1) + D[count-1]),...,
  (type(0), disp(0) +  D[count-1] + (B[count-1] -1)* ex),...,
  (type(n-1), disp(n-1) + D[count-1] + (B[count-1] -1)* ex)}

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_create_hindexed

MPI_Type_indexed