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/*
* Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2020 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* Copyright (c) 2004-2008 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) 2010-2012 Oak Ridge National Labs. All rights reserved.
* Copyright (c) 2015 Research Organization for Information Science
* and Technology (RIST). All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "ompi_config.h"
#include <stdio.h>
#include "ompi/mpi/c/bindings.h"
#include "ompi/runtime/params.h"
#include "ompi/communicator/communicator.h"
#include "ompi/errhandler/errhandler.h"
#include "ompi/memchecker.h"
#include "ompi/runtime/ompi_spc.h"
#if OMPI_BUILD_MPI_PROFILING
#if OPAL_HAVE_WEAK_SYMBOLS
#pragma weak MPI_Barrier = PMPI_Barrier
#endif
#define MPI_Barrier PMPI_Barrier
#endif
static const char FUNC_NAME[] = "MPI_Barrier";
int MPI_Barrier(MPI_Comm comm)
{
int err = MPI_SUCCESS;
SPC_RECORD(OMPI_SPC_BARRIER, 1);
MEMCHECKER(
memchecker_comm(comm);
);
/* Error checking */
if (MPI_PARAM_CHECK) {
OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
if (ompi_comm_invalid(comm)) {
return OMPI_ERRHANDLER_NOHANDLE_INVOKE(MPI_ERR_COMM, FUNC_NAME);
}
}
#if OPAL_ENABLE_FT_MPI
/*
* An early check, so as to return early if we are using a broken
* communicator. This is not absolutely necessary since we will
* check for this, and other, error conditions during the operation.
*/
if( OPAL_UNLIKELY(!ompi_comm_iface_coll_check(comm, &err)) ) {
OMPI_ERRHANDLER_RETURN(err, comm, err, FUNC_NAME);
}
#endif
/* Intracommunicators: Only invoke the back-end coll module barrier
function if there's more than one process in the communicator */
if (OMPI_COMM_IS_INTRA(comm)) {
if (ompi_comm_size(comm) > 1) {
err = comm->c_coll->coll_barrier(comm, comm->c_coll->coll_barrier_module);
}
}
/* Intercommunicators -- always invoke, because, by definition,
there's always at least 2 processes in an intercommunicator. */
else {
err = comm->c_coll->coll_barrier(comm, comm->c_coll->coll_barrier_module);
}
/* All done */
OMPI_ERRHANDLER_RETURN(err, comm, err, FUNC_NAME);
}
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