76 строки
2.0 KiB
C
76 строки
2.0 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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* $COPYRIGHT$
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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/memchecker.h"
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#if OMPI_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
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#pragma weak MPI_Barrier = PMPI_Barrier
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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_Barrier";
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int MPI_Barrier(MPI_Comm comm)
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{
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int err = MPI_SUCCESS;
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MEMCHECKER(
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memchecker_comm(comm);
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);
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OPAL_CR_TEST_CHECKPOINT_READY();
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OPAL_CR_TEST_CHECKPOINT_READY();
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/* Error checking */
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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(comm)) {
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return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_COMM, FUNC_NAME);
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}
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}
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/* Intracommunicators: Only invoke the back-end coll module barrier
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function if there's more than one process in the communicator */
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if (OMPI_COMM_IS_INTRA(comm)) {
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if (ompi_comm_size(comm) > 1) {
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err = comm->c_coll.coll_barrier(comm, comm->c_coll.coll_barrier_module);
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}
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}
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/* Intercommunicators -- always invoke, because, by definition,
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there's always at least 2 processes in an intercommunicator. */
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else {
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err = comm->c_coll.coll_barrier(comm, comm->c_coll.coll_barrier_module);
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}
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/* All done */
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OMPI_ERRHANDLER_RETURN(err, comm, err, FUNC_NAME);
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}
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