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MPI_Type_create_resized - Returns a new data type with new extent
and upper and lower bounds.
#include <mpi.h>
int MPI_Type_create_resized(MPI_Datatype oldtype, MPI_Aint lb,
MPI_Aint extent, MPI_Datatype *newtype)
INCLUDE ’mpif.h’
MPI_TYPE_CREATE_RESIZED(OLDTYPE, LB, EXTENT, NEWTYPE, IERROR)
INTEGER OLDTYPE, NEWTYPE, IERROR
INTEGER(KIND=MPI_ADDRESS_KIND) LB, EXTENT
#include <mpi.h>
MPI::Datatype MPI::Datatype::Create_resized(const MPI::Aint lb,
const MPI::Aint extent) const
- oldtype
- Input data type (handle).
- lb
- New lower bound
of data type (integer).
- extent
- New extent of data type (integer).
- newtype
- Output data type (handle).
- IERROR
- Fortran only: Error
status (integer).
MPI_Type_create_resized returns in newtype
a handle to a new data type that is identical to oldtype, except that the
lower bound of this new data type is set to be lb, and its upper bound
is set to be lb + extent. Any previous lb and ub markers are erased, and
a new pair of lower bound and upper bound markers are put in the positions
indicated by the lb and extent arguments. This affects the behavior of the
data type when used in communication operations, with count > 1, and when
used in the construction of new derived data types.
The
MPI standard prescribes portable Fortran syntax for the LB and EXTENT arguments
only for Fortran 90. FORTRAN 77 users may use the non-portable syntax
INTEGER*MPI_ADDRESS_KIND LB
or
INTEGER*MPI_ADDRESS_KIND EXTENT
where MPI_ADDRESS_KIND is a constant defined in mpif.h and gives the length
of the declared integer in bytes.
Use of MPI_Type_create_resized is
strongly recommended over the old MPI-1 functions MPI_Type_extent and MPI_Type_lb.
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_get_extent
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