/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
/*
 * 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) 2006-2007 Cisco Systems, Inc.  All rights reserved.
 * Copyright (c) 2006-2009 University of Houston.  All rights reserved.
 * Copyright (c) 2012-2013 Inria.  All rights reserved.
 * Copyright (c) 2014-2015 Research Organization for Information Science
 *                         and Technology (RIST). All rights reserved.
 * Copyright (c) 2016      Los Alamos National Security, LLC.  All rights
 *                         reserved.
 * Copyright (c) 2018      Triad National Security, LLC. All rights
 *                         reserved.
 * $COPYRIGHT$
 *
 * Additional copyrights may follow
 *
 * $HEADER$
 */

#include "ompi_config.h"

#include "ompi/mpi/c/bindings.h"
#include "ompi/runtime/params.h"
#include "ompi/errhandler/errhandler.h"
#include "ompi/mca/pml/pml.h"
#include "ompi/communicator/communicator.h"
#include "ompi/request/request.h"
#include "ompi/memchecker.h"

#if OMPI_BUILD_MPI_PROFILING
#if OPAL_HAVE_WEAK_SYMBOLS
#pragma weak MPI_Intercomm_create = PMPI_Intercomm_create
#endif
#define MPI_Intercomm_create PMPI_Intercomm_create
#endif

static const char FUNC_NAME[] = "MPI_Intercomm_create";


int MPI_Intercomm_create(MPI_Comm local_comm, int local_leader,
                         MPI_Comm bridge_comm, int remote_leader,
                         int tag, MPI_Comm *newintercomm)
{
    int rc;

    MEMCHECKER(
        memchecker_comm(local_comm);
        memchecker_comm(bridge_comm);
    );

    if ( MPI_PARAM_CHECK ) {
        OMPI_ERR_INIT_FINALIZE(FUNC_NAME);

        if ( ompi_comm_invalid ( local_comm ) ||
             ( local_comm->c_flags & OMPI_COMM_INTER ) )
            return OMPI_ERRHANDLER_INVOKE ( MPI_COMM_WORLD, MPI_ERR_COMM,
                                            FUNC_NAME);

        if ( NULL == newintercomm )
            return OMPI_ERRHANDLER_INVOKE ( local_comm, MPI_ERR_ARG,
                                            FUNC_NAME);

        /* if ( tag < 0 || tag > MPI_TAG_UB )
             return OMPI_ERRHANDLER_INVOKE ( local_comm, MPI_ERR_ARG,
                                             FUNC_NAME);
        */
    }

#if OPAL_ENABLE_FT_MPI
    /*
     * We must not call ompi_comm_iface_create_check() here, because that
     * risks leaving the remote group dangling on an unmatched operation.
     * We will let the  logic proceed and discover the
     * issue internally so that all sides get informed.
     */
#endif

    rc = ompi_intercomm_create (local_comm, local_leader, bridge_comm, remote_leader, tag,
                                newintercomm);

    OMPI_ERRHANDLER_RETURN (rc, local_comm, rc, FUNC_NAME);
}

