NAME¶
MPI_Cart_coords - Determines process coords in Cartesian topology given
rank in group.
C Syntax¶
#include <mpi.h>
int MPI_Cart_coords(MPI_Comm comm, int rank, int maxdims,
int coords[])
Fortran Syntax¶
INCLUDE 'mpif.h'
MPI_CART_COORDS(COMM, RANK, MAXDIMS, COORDS, IERROR)
INTEGER COMM, RANK, MAXDIMS, COORDS(*), IERROR
C++ Syntax¶
#include <mpi.h>
void Cartcomm::Get_coords(int rank, int maxdims,
int coords[]) const
- comm
- Communicator with Cartesian structure (handle).
- rank
- Rank of a process within group of comm (integer).
- maxdims
-
Length of vector coords in the calling program (integer).
OUTPUT PARAMETERS¶
- coords
- Integer array (of size ndims,which was defined by MPI_Cart_create call)
containing the Cartesian coordinates of specified process (integer).
- IERROR
- Fortran only: Error status (integer).
DESCRIPTION¶
MPI_Cart_coords provies a mapping of ranks to Cartesian coordinates.
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++ 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.