/*
 * 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) 2004-2008 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.
 * $COPYRIGHT$
 * 
 * Additional copyrights may follow
 * 
 * $HEADER$
 */
#include "ompi_config.h"
#include <stdio.h>

#include "ompi/mpi/c/bindings.h"
#include "ompi/win/win.h"
#include "ompi/mca/osc/osc.h"
#include "ompi/memchecker.h"

#if OMPI_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
#pragma weak MPI_Win_fence = PMPI_Win_fence
#endif

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

static const char FUNC_NAME[] = "MPI_Win_fence";


int MPI_Win_fence(int assert, MPI_Win win) 
{
    int rc;

    if (MPI_PARAM_CHECK) {
        OMPI_ERR_INIT_FINALIZE(FUNC_NAME);

        if (ompi_win_invalid(win)) {
            return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_WIN, FUNC_NAME);
        } else if (0 != (assert & ~(MPI_MODE_NOSTORE | MPI_MODE_NOPUT | 
                                    MPI_MODE_NOPRECEDE | MPI_MODE_NOSUCCEED))) {
            return OMPI_ERRHANDLER_INVOKE(win, MPI_ERR_ASSERT, FUNC_NAME);
        } else if (0 != (ompi_win_get_mode(win) &
                         (OMPI_WIN_POSTED | OMPI_WIN_STARTED))) {
            /* If we're in a post or start, we can't be in a fence */
            return OMPI_ERRHANDLER_INVOKE(win, MPI_ERR_RMA_SYNC, FUNC_NAME);
        } 
    }
    MEMCHECKER (
        /* First, we have to make sure it's a valid and initialised win. */
        if( win->w_baseptr != NULL && win->w_size != 0 && win->w_mode != 0)
            opal_memchecker_base_mem_noaccess( win->w_baseptr, win->w_size );
    );

    OPAL_CR_ENTER_LIBRARY();

    rc = win->w_osc_module->osc_fence(assert, win);
    OMPI_ERRHANDLER_RETURN(rc, win, rc, FUNC_NAME);
}