mpi_cart_coords(3openmpi) [osx man page]
MPI_Cart_coords(3OpenMPI) MPI_Cart_coords(3OpenMPI) NAME
MPI_Cart_coords - Determines process coords in Cartesian topology given rank in group. SYNTAX
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 INPUT PARAMETERS
comm Communicator with Cartesian structure (handle). rank Rank of a process within group of comm (integer). maxdims Length of vector coord 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
The inverse mapping, rank-to-coordinates translation is provided by MPI_Cart_coords. 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++ func- tions 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. Open MPI 1.2 September 2006 MPI_Cart_coords(3OpenMPI)
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MPI_Cart_get(3OpenMPI) MPI_Cart_get(3OpenMPI) 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++ func- tions 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 Open MPI 1.2 September 2006 MPI_Cart_get(3OpenMPI)