132 строки
4.2 KiB
C
132 строки
4.2 KiB
C
/*
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* Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2004-2005 The University of Tennessee and The University
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* of Tennessee Research Foundation. All rights
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* reserved.
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* Copyright (c) 2004-2008 High Performance Computing Center Stuttgart,
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* University of Stuttgart. All rights reserved.
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* All rights reserved.
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* Copyright (c) 2007-2008 Cisco Systems, Inc. All rights reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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#include "ompi_config.h"
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#include <stdio.h>
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#include "ompi/mpi/c/bindings.h"
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#include "ompi/runtime/params.h"
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#include "ompi/communicator/communicator.h"
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#include "ompi/errhandler/errhandler.h"
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#include "ompi/mca/topo/base/base.h"
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#include "ompi/memchecker.h"
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#if OPAL_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
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#pragma weak MPI_Cart_create = PMPI_Cart_create
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#endif
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#if OMPI_PROFILING_DEFINES
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#include "ompi/mpi/c/profile/defines.h"
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#endif
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static const char FUNC_NAME[] = "MPI_Cart_create";
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int MPI_Cart_create(MPI_Comm old_comm, int ndims, int *dims,
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int *periods, int reorder, MPI_Comm *comm_cart) {
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int err;
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bool re_order = false;
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MEMCHECKER(
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memchecker_comm(old_comm);
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);
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/* check the arguments */
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if (MPI_PARAM_CHECK) {
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OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
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if (ompi_comm_invalid(old_comm)) {
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return OMPI_ERRHANDLER_INVOKE (MPI_COMM_WORLD, MPI_ERR_COMM,
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FUNC_NAME);
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}
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if (OMPI_COMM_IS_INTER(old_comm)) {
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return OMPI_ERRHANDLER_INVOKE (old_comm, MPI_ERR_COMM,
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FUNC_NAME);
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}
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if (ndims < 0) {
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return OMPI_ERRHANDLER_INVOKE (old_comm, MPI_ERR_ARG,
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FUNC_NAME);
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} else if (ndims >= 1 &&
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(NULL == dims || NULL == periods || NULL == comm_cart)) {
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return OMPI_ERRHANDLER_INVOKE (old_comm, MPI_ERR_ARG,
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FUNC_NAME);
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}
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/* check if the number of processes on the grid are correct */
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{
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int i;
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int *p = dims;
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int count_nodes = 1;
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int parent_procs = ompi_comm_size(old_comm);
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for (i=0; i < ndims; i++) {
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count_nodes *= *p;
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p++;
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}
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if (parent_procs < count_nodes) {
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return OMPI_ERRHANDLER_INVOKE (old_comm, MPI_ERR_ARG,
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FUNC_NAME);
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}
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}
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}
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/*
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* Now we have to check if the topo module exists or not. This has been
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* removed from initialization since most of the MPI calls do not use
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* this module
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*/
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if (!(mca_topo_base_components_opened_valid ||
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mca_topo_base_components_available_valid)) {
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if (OMPI_SUCCESS != (err = mca_topo_base_open())) {
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return OMPI_ERRHANDLER_INVOKE(old_comm, err, FUNC_NAME);
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}
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if (OMPI_SUCCESS !=
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(err = mca_topo_base_find_available(OPAL_ENABLE_PROGRESS_THREADS,
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OPAL_ENABLE_MPI_THREADS))) {
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return OMPI_ERRHANDLER_INVOKE(old_comm, err, FUNC_NAME);
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}
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}
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OPAL_CR_ENTER_LIBRARY();
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/* everything seems to be alright with the communicator, we can go
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* ahead and select a topology module for this purpose and create
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* the new cartesian communicator
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*/
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re_order = (0 == reorder)? false : true;
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err = ompi_topo_create (old_comm,
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ndims,
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dims,
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periods,
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re_order,
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comm_cart,
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OMPI_COMM_CART);
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OPAL_CR_EXIT_LIBRARY();
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/* check the error status */
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if (MPI_SUCCESS != err) {
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return OMPI_ERRHANDLER_INVOKE(old_comm, err, FUNC_NAME);
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}
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/* All done */
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return MPI_SUCCESS;
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}
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