/* -*- 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) 2004-2005 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) 2014      Los Alamos National Security, LLC. 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/win/win.h"
#include "ompi/mca/osc/osc.h"

#if OPAL_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
#pragma weak MPI_Win_lock = PMPI_Win_lock
#endif

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

static const char FUNC_NAME[] = "MPI_Win_lock";


int MPI_Win_lock(int lock_type, int rank, 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 (lock_type != MPI_LOCK_EXCLUSIVE &&
                   lock_type != MPI_LOCK_SHARED) {
            return OMPI_ERRHANDLER_INVOKE(win, MPI_ERR_LOCKTYPE, FUNC_NAME);
        } else if (ompi_win_peer_invalid(win, rank)) {
            return OMPI_ERRHANDLER_INVOKE(win, MPI_ERR_RANK, FUNC_NAME);
        } else if (0 != (assert & ~(MPI_MODE_NOCHECK))) {
            return OMPI_ERRHANDLER_INVOKE(win, MPI_ERR_ASSERT, FUNC_NAME);
        } else if (! ompi_win_allow_locks(win)) {
            return OMPI_ERRHANDLER_INVOKE(win, MPI_ERR_RMA_SYNC, FUNC_NAME);
        }
    }

    /* NTH: do not bother keeping track of locking MPI_PROC_NULL. */
    if (MPI_PROC_NULL == rank) return MPI_SUCCESS;

    OPAL_CR_ENTER_LIBRARY();

    rc = win->w_osc_module->osc_lock(lock_type, rank, assert, win);
    OMPI_ERRHANDLER_RETURN(rc, win, rc, FUNC_NAME);
}