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/*
* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2013 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
* University of Stuttgart. All rights reserved.
* Copyright (c) 2004-2005 The Regents of the University of California.
* All rights reserved.
* Copyright (c) 2008 Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2012-2013 Inria. All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "ompi_config.h"
#include "ompi/mca/topo/base/base.h"
#include "ompi/communicator/communicator.h"
/*
* function - determines process coords in cartesian topology given
* rank in group
*
* @param comm - communicator with cartesian structure (handle)
* @param rank - rank of a process within group of 'comm' (integer)
* @param maxdims - length of vector 'coords' in the calling program (integer)
* @param coords - integer array (of size 'ndims') containing the cartesian
* coordinates of specified process (integer)
*
* @retval MPI_SUCCESS
*/
int mca_topo_base_cart_coords(ompi_communicator_t* comm,
int rank,
int maxdims,
int *coords)
{
int dim, remprocs, i, *d;
/*
* loop computing the co-ordinates
*/
d = comm->c_topo->mtc.cart->dims;
remprocs = ompi_comm_size(comm);
for (i = 0;
(i < comm->c_topo->mtc.cart->ndims) && (i < maxdims);
++i, ++d) {
dim = *d;
remprocs /= dim;
*coords++ = rank / remprocs;
rank %= remprocs;
}
return MPI_SUCCESS;
}
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