MPI_Type_hindexed(3) Open MPI MPI_Type_hindexed(3)
NAME
MPI_Type_hindexed - Creates an indexed datatype with offsets in bytes
-- use of this routine is deprecated.
SYNTAX
C Syntax
#include <mpi.h>
int MPI_Type_hindexed(int count, int *array_of_blocklengths,
MPI_Aint *array_of_displacements, MPI_Datatype oldtype,
MPI_Datatype *newtype)
Fortran Syntax
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
INPUT PARAMETERS
count Number of blocks -- also number of entries in array_of_dis-
placements and array_of_blocklengths (integer).
array_of_blocklengths
Number of elements in each block (array of nonnegative inte-
gers).
array_of_displacements
Byte displacement of each block (C: array of MPI_Aint, For-
tran: array of integer).
oldtype Old datatype (handle).
OUTPUT PARAMETERS
newtype New datatype (handle).
IERROR Fortran only: Error status (integer).
DESCRIPTION
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 dis-
placements 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)}
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++ func-
tions 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_create_hindexed
MPI_Type_indexed
4.1.2 Nov 24, 2021 MPI_Type_hindexed(3)
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