MPI_Type_hvector(3) Open MPI MPI_Type_hvector(3)NAMEMPI_Type_hvector - Creates a vector (strided) datatype with offset in
bytes -- use of this routine is deprecated.
SYNTAXC Syntax
#include <mpi.h>
int MPI_Type_hvector(int count, int blocklength, MPI_Aint stride,
MPI_Datatype oldtype, MPI_Datatype *newtype)
Fortran Syntax
INCLUDE 'mpif.h'
MPI_TYPE_HVECTOR(COUNT, BLOCKLENGTH, STRIDE, OLDTYPE, NEWTYPE,
IERROR)
INTEGER COUNT, BLOCKLENGTH, STRIDE, OLDTYPE
INTEGER NEWTYPE, IERROR
INPUT PARAMETERS
count Number of blocks (nonnegative integer).
blocklength
Number of elements in each block (nonnegative integer).
stride Number of bytes between start of each block (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_hvector instead.
This deprecated routine is not available in C++.
The function MPI_Type_hvector is identical to MPI_Type_vector, except
that stride is given in bytes, rather than in elements. The use for
both types of vector constructors is illustrated in the examples in
Section 3.12.7 of the MPI-1 Standard.
Assume that oldtype has type map
{(type(0), disp(0)), ..., (type(n-1), disp(n-1))}
with extent ex. Let bl be the blocklength. The newly created datatype
has a type map with count * bl * n entries:
{(type(0), disp(0)), ..., (type(n-1), disp(n-1)),
(type(0), disp(0) + ex), ..., (type(n-1), disp(n-1) + ex),
..., (type(0), disp(0) + (bl -1) * ex),...,(type(n-1),
disp(n-1) + (bl -1) * ex), (type(0), disp(0) + stride),
...,(type(n-1), disp(n-1) + stride), ..., (type(0),
disp(0) + stride + (bl - 1) * ex), ..., (type(n-1),
disp(n-1) + stride + (bl -1) * ex), ..., (type(0),
disp(0) + stride * (count -1)), ...,(type(n-1),
disp(n-1) + stride * (count -1)), ..., (type(0),
disp(0) + stride * (count -1) + (bl -1) * ex), ...,
(type(n-1), disp(n-1) + stride * (count -1) + (bl -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_hvector
MPI_Type_vector
1.7.4 Feb 04, 2014 MPI_Type_hvector(3)
