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MPI_Cartdim_get - Retrieves Cartesian topology information associated
with a communicator.
#include <mpi.h>
int MPI_Cartdim_get(MPI_Comm comm, int *ndims)
INCLUDE ’mpif.h’
MPI_CARTDIM_GET(COMM, NDIMS, IERROR)
INTEGER COMM, NDIMS, IERROR
#include <mpi.h>
int Cartcomm::Get_dim() const
- comm
- Communicator with Cartesian structure (handle).
- ndims
- Number of dimensions of the Cartesian structure (integer).
- IERROR
- Fortran only: Error status (integer).
MPI_Cartdim_get
returns the number of dimensions of the Cartesian structure.
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_Cart_get
MPI_Cart_create
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