author | Florian Pose <fp@igh-essen.com> |
Fri, 01 Feb 2008 20:35:12 +0000 | |
changeset 780 | 53b9a0a92154 |
parent 627 | 4793ca94f082 |
child 792 | 3778920f61e4 |
permissions | -rw-r--r-- |
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/****************************************************************************** |
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* |
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* $Id$ |
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* |
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* Copyright (C) 2006 Florian Pose, Ingenieurgemeinschaft IgH |
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* |
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* This file is part of the IgH EtherCAT Master. |
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* |
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* The IgH EtherCAT Master is free software; you can redistribute it |
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* and/or modify it under the terms of the GNU General Public License |
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* as published by the Free Software Foundation; either version 2 of the |
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* License, or (at your option) any later version. |
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* |
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* The IgH EtherCAT Master is distributed in the hope that it will be |
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* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with the IgH EtherCAT Master; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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* |
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* The right to use EtherCAT Technology is granted and comes free of |
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* charge under condition of compatibility of product made by |
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* Licensee. People intending to distribute/sell products based on the |
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* code, have to sign an agreement to guarantee that products using |
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* software based on IgH EtherCAT master stay compatible with the actual |
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* EtherCAT specification (which are released themselves as an open |
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* standard) as the (only) precondition to have the right to use EtherCAT |
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* Technology, IP and trade marks. |
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* |
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*****************************************************************************/ |
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|
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/** |
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\file |
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EtherCAT process data object methods. |
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*/ |
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/*****************************************************************************/ |
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|
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#include <linux/slab.h> |
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|
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#include "pdo.h" |
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/*****************************************************************************/ |
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/** |
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* PDO constructor. |
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*/ |
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void ec_pdo_init(ec_pdo_t *pdo /**< EtherCAT PDO */) |
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{ |
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pdo->name = NULL; |
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INIT_LIST_HEAD(&pdo->entries); |
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} |
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/*****************************************************************************/ |
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|
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/** |
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* PDO destructor. |
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*/ |
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void ec_pdo_clear(ec_pdo_t *pdo /**< EtherCAT PDO */) |
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{ |
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ec_pdo_entry_t *entry, *next; |
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|
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// free all PDO entries |
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list_for_each_entry_safe(entry, next, &pdo->entries, list) { |
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list_del(&entry->list); |
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kfree(entry); |
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} |
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} |
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/*****************************************************************************/ |
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|
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/** |
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* Makes a deep copy of a PDO. |
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*/ |
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int ec_pdo_copy(ec_pdo_t *pdo, const ec_pdo_t *other_pdo) |
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{ |
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ec_pdo_entry_t *entry, *other_entry, *next; |
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|
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// make flat copy |
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*pdo = *other_pdo; |
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|
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INIT_LIST_HEAD(&pdo->entries); |
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list_for_each_entry(other_entry, &other_pdo->entries, list) { |
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if (!(entry = (ec_pdo_entry_t *) |
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kmalloc(sizeof(ec_pdo_entry_t), GFP_KERNEL))) { |
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EC_ERR("Failed to allocate memory for PDO entry copy.\n"); |
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goto out_free; |
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} |
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*entry = *other_entry; // flat copy is sufficient |
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list_add_tail(&entry->list, &pdo->entries); |
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} |
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return 0; |
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|
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out_free: |
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list_for_each_entry_safe(entry, next, &pdo->entries, list) { |
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list_del(&entry->list); |
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kfree(entry); |
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} |
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return -1; |
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} |
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|
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/*****************************************************************************/ |