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MPI_Cart_get
Langue: en
Version: Mar 18, 2009 (fedora - 05/07/09)
Section: 3 (Bibliothèques de fonctions)
Sommaire
NAME
MPI_Cart_get - Retrieves Cartesian topology information associated with a communicator.SYNTAX
C Syntax
#include <mpi.h> int MPI_Cart_get(MPI_Comm comm, int maxdims, int *dims, int *periods, int *coords)
Fortran Syntax
INCLUDE 'mpif.h' MPI_CART_GET(COMM, MAXDIMS, DIMS, PERIODS, COORDS, IERROR) INTEGER COMM, MAXDIMS, DIMS(*), COORDS(*), IERROR LOGICAL PERIODS(*)
C++ Syntax
#include <mpi.h> void Cartcomm::Get_topo(int maxdims, int dims[], bool periods[], int coords[]) const
INPUT PARAMETERS
- comm
- Communicator with Cartesian structure (handle).
- maxdims
- Length of vectors dims, periods, and coords in the calling program (integer).
OUTPUT PARAMETERS
- dims
- Number of processes for each Cartesian dimension (array of integers).
- periods
- Periodicity (true/false) for each Cartesian dimension (array of logicals).
- coords
- Coordinates of calling process in Cartesian structure (array of integers).
- IERROR
- Fortran only: Error status (integer).
DESCRIPTION
The functions MPI_Cartdim_get and MPI_Cart_get return the Cartesian topology information that was associated with a communicator by MPI_Cart_create.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.
SEE ALSO
MPI_Cartdim_get MPI_Cart_create
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