77 строки
2.4 KiB
C
77 строки
2.4 KiB
C
/*
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* Copyright (c) 2004-2005 The Trustees of Indiana University.
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* All rights reserved.
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* Copyright (c) 2004-2005 The Trustees of the University of Tennessee.
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* All rights reserved.
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* Copyright (c) 2004-2005 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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* $COPYRIGHT$
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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 "mpi.h"
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#include "mpi/c/bindings.h"
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#include "communicator/communicator.h"
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#include "errhandler/errhandler.h"
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#include "mca/topo/topo.h"
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#if OMPI_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
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#pragma weak MPI_Graph_neighbors_count = PMPI_Graph_neighbors_count
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#endif
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#if OMPI_PROFILING_DEFINES
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#include "mpi/c/profile/defines.h"
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#endif
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static const char FUNC_NAME[] = "MPI_Graph_neighbors_count";
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int MPI_Graph_neighbors_count(MPI_Comm comm, int rank, int *nneighbors)
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{
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int err;
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mca_topo_base_module_graph_neighbors_count_fn_t func;
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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 (MPI_COMM_NULL == 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(comm)) {
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return OMPI_ERRHANDLER_INVOKE (comm, MPI_ERR_COMM,
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FUNC_NAME);
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}
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if (!OMPI_COMM_IS_GRAPH(comm)) {
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return OMPI_ERRHANDLER_INVOKE (comm, MPI_ERR_TOPOLOGY,
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FUNC_NAME);
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}
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if ((0 > rank) || (rank > ompi_group_size(comm->c_local_group))) {
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return OMPI_ERRHANDLER_INVOKE (comm, MPI_ERR_RANK,
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FUNC_NAME);
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}
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if (NULL == nneighbors) {
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return OMPI_ERRHANDLER_INVOKE (comm, MPI_ERR_ARG,
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FUNC_NAME);
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}
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}
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/* get the function pointer to do the right thing */
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func = comm->c_topo->topo_graph_neighbors_count;
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/* call the function */
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if ( MPI_SUCCESS !=
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(err = func(comm, rank, nneighbors))) {
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return OMPI_ERRHANDLER_INVOKE(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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