/*
 * Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
 *                         University Research and Technology
 *                         Corporation.  All rights reserved.
 * Copyright (c) 2004-2005 The University of Tennessee and The University
 *                         of Tennessee Research Foundation.  All rights
 *                         reserved.
 * Copyright (c) 2004-2005 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      Cisco Systems, Inc.  All rights reserved.
 * $COPYRIGHT$
 * 
 * Additional copyrights may follow
 * 
 * $HEADER$
 */
#include "ompi_config.h"

#include <stdio.h>

#include "ompi/win/win.h"
#include "ompi/mpi/c/bindings.h"
#include "ompi/runtime/params.h"
#include "ompi/errhandler/errhandler.h"
#include "ompi/mpi/f77/fint_2_int.h"

#if OPAL_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
#pragma weak MPI_Win_c2f = PMPI_Win_c2f
#endif

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

static const char FUNC_NAME[] = "MPI_Win_c2f";


MPI_Fint MPI_Win_c2f(MPI_Win win) 
{

    OPAL_CR_NOOP_PROGRESS();

    if ( MPI_PARAM_CHECK) {
        OMPI_ERR_INIT_FINALIZE(FUNC_NAME);

        /* Note that ompi_win_invalid() explicitly checks for
           MPI_WIN_NULL, but MPI_WIN_C2F is supposed to treat
           MPI_WIN_NULL as a valid window (and therefore return
           a valid Fortran handle for it).  Hence, this function
           should not return an error if MPI_WIN_NULL is passed in.

           See a big comment in ompi/communicator/communicator.h about
           this (I know that's not win.h, but the issues are related,
           and that's where the explanation is). */
        if (ompi_win_invalid(win) && MPI_WIN_NULL != win) {
            return OMPI_INT_2_FINT(-1);
        }
    }

    return OMPI_INT_2_FINT(win->w_f_to_c_index);
}