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MPI_Type_get_extent - Returns the lower bound and extent of a data
type.
#include <mpi.h>
int MPI_Type_get_extent(MPI_Datatype datatype, MPI_Aint *lb,
MPI_Aint *extent)
INCLUDE ’mpif.h’
MPI_TYPE_GET_EXTENT(DATATYPE, LB, EXTENT, IERROR)
INTEGER DATATYPE, IERROR
INTEGER(KIND=MPI_ADDRESS_KIND) LB, EXTENT
#include <mpi.h>
void MPI::Datatype::Get_extent(MPI::Aint& lb, MPI::Aint& extent)
const
- datatype
- Data type (handle).
- lb
- Lower
bound of data type (integer).
- extent
- Data type extent (integer).
- IERROR
- Fortran only: Error status (integer).
MPI_Type_get_extent returns
the lower bound and the extent of datatype.
Use of MPI_Type_get_extent
is strongly recommended over the old MPI-1 functions MPI_Type_extent and
MPI_Type_lb.
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.
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.
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