fp@627: /******************************************************************************
fp@627:  *
fp@627:  *  $Id$
fp@627:  *
fp@627:  *  Copyright (C) 2006  Florian Pose, Ingenieurgemeinschaft IgH
fp@627:  *
fp@627:  *  This file is part of the IgH EtherCAT Master.
fp@627:  *
fp@627:  *  The IgH EtherCAT Master is free software; you can redistribute it
fp@627:  *  and/or modify it under the terms of the GNU General Public License
fp@627:  *  as published by the Free Software Foundation; either version 2 of the
fp@627:  *  License, or (at your option) any later version.
fp@627:  *
fp@627:  *  The IgH EtherCAT Master is distributed in the hope that it will be
fp@627:  *  useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
fp@627:  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
fp@627:  *  GNU General Public License for more details.
fp@627:  *
fp@627:  *  You should have received a copy of the GNU General Public License
fp@627:  *  along with the IgH EtherCAT Master; if not, write to the Free Software
fp@627:  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
fp@627:  *
fp@627:  *  The right to use EtherCAT Technology is granted and comes free of
fp@627:  *  charge under condition of compatibility of product made by
fp@627:  *  Licensee. People intending to distribute/sell products based on the
fp@627:  *  code, have to sign an agreement to guarantee that products using
fp@627:  *  software based on IgH EtherCAT master stay compatible with the actual
fp@627:  *  EtherCAT specification (which are released themselves as an open
fp@627:  *  standard) as the (only) precondition to have the right to use EtherCAT
fp@627:  *  Technology, IP and trade marks.
fp@627:  *
fp@627:  *****************************************************************************/
fp@627: 
fp@627: /**
fp@627:    \file
fp@627:    EtherCAT process data object methods.
fp@627: */
fp@627: 
fp@627: /*****************************************************************************/
fp@627: 
fp@627: #include <linux/slab.h>
fp@627: 
fp@627: #include "pdo.h"
fp@627: 
fp@627: /*****************************************************************************/
fp@627: 
fp@627: /**
fp@627:  * PDO constructor.
fp@627:  */
fp@627: 
fp@627: void ec_pdo_init(ec_pdo_t *pdo /**< EtherCAT PDO */)
fp@627: {
fp@627:     pdo->name = NULL;
fp@627:     INIT_LIST_HEAD(&pdo->entries);
fp@627: }
fp@627: 
fp@627: /*****************************************************************************/
fp@627: 
fp@627: /**
fp@627:  * PDO destructor.
fp@627:  */
fp@627: 
fp@627: void ec_pdo_clear(ec_pdo_t *pdo /**< EtherCAT PDO */)
fp@627: {
fp@627:     ec_pdo_entry_t *entry, *next;
fp@627: 
fp@627:     // free all PDO entries
fp@627:     list_for_each_entry_safe(entry, next, &pdo->entries, list) {
fp@627:         list_del(&entry->list);
fp@627:         kfree(entry);
fp@627:     }
fp@627: }
fp@627: 
fp@627: /*****************************************************************************/
fp@627: 
fp@627: /**
fp@627:  * Makes a deep copy of a PDO.
fp@627:  */
fp@627: 
fp@627: int ec_pdo_copy(ec_pdo_t *pdo, const ec_pdo_t *other_pdo)
fp@627: {
fp@627:     ec_pdo_entry_t *entry, *other_entry, *next;
fp@627: 
fp@627:     // make flat copy
fp@627:     *pdo = *other_pdo;
fp@627: 
fp@627:     INIT_LIST_HEAD(&pdo->entries);
fp@627:     list_for_each_entry(other_entry, &other_pdo->entries, list) {
fp@627:         if (!(entry = (ec_pdo_entry_t *)
fp@627:                     kmalloc(sizeof(ec_pdo_entry_t), GFP_KERNEL))) {
fp@627:             EC_ERR("Failed to allocate memory for PDO entry copy.\n");
fp@627:             goto out_free;
fp@627:         }
fp@627: 
fp@627:         *entry = *other_entry; // flat copy is sufficient
fp@627:         list_add_tail(&entry->list, &pdo->entries);
fp@627:     }
fp@627: 
fp@627:     return 0;
fp@627: 
fp@627: out_free:
fp@627:     list_for_each_entry_safe(entry, next, &pdo->entries, list) {
fp@627:         list_del(&entry->list);
fp@627:         kfree(entry);
fp@627:     }
fp@627:     return -1;
fp@627: }
fp@627: 
fp@627: /*****************************************************************************/