/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
/*
 * Copyright (c) 2012-2015 Los Alamos National Security, LLC. All rights
 *                         reserved.
 * Copyright (c) 2014-2018 Cisco Systems, Inc.  All rights reserved
 * Copyright (c) 2017      IBM Corporation. All rights reserved.
 * $COPYRIGHT$
 *
 * Additional copyrights may follow
 *
 * $HEADER$
 */


#include "ompi/mpi/tool/mpit-internal.h"

#include "ompi/runtime/ompi_info_support.h"
#include "opal/include/opal/sys/atomic.h"
#include "opal/runtime/opal.h"

#if OPAL_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
#pragma weak MPI_T_finalize = PMPI_T_finalize
#endif

#if OMPI_PROFILING_DEFINES
#include "ompi/mpi/tool/profile/defines.h"
#endif


int MPI_T_finalize (void)
{
    ompi_mpit_lock ();

    if (!mpit_is_initialized ()) {
        ompi_mpit_unlock ();
        return MPI_T_ERR_NOT_INITIALIZED;
    }

    if (0 == --ompi_mpit_init_count) {
        (void) ompi_info_close_components ();

        int32_t state = ompi_mpi_state;
        if ((state < OMPI_MPI_STATE_INIT_COMPLETED ||
             state >= OMPI_MPI_STATE_FINALIZE_PAST_COMM_SELF_DESTRUCT) &&
            (NULL != ompi_mpi_main_thread)) {
            /* we are not between MPI_Init and MPI_Finalize so we
             * have to free the ompi_mpi_main_thread */
            OBJ_RELEASE(ompi_mpi_main_thread);
            ompi_mpi_main_thread = NULL;
        }

        (void) opal_finalize_util ();
    }

    ompi_mpit_unlock ();

    return MPI_SUCCESS;
}