| /* |
| * Bag of pointers |
| * Copyright (c) 2001 by Abramo Bagnara <abramo@alsa-project.org> |
| * |
| * |
| * This library is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU Lesser General Public License as |
| * published by the Free Software Foundation; either version 2.1 of |
| * the License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| * |
| */ |
| |
| #include "mixer_local.h" |
| |
| int bag_new(bag_t **bag) |
| { |
| bag_t *b = malloc(sizeof(*b)); |
| if (!b) |
| return -ENOMEM; |
| INIT_LIST_HEAD(b); |
| *bag = b; |
| return 0; |
| } |
| |
| void bag_free(bag_t *bag) |
| { |
| assert(list_empty(bag)); |
| free(bag); |
| } |
| |
| int bag_empty(bag_t *bag) |
| { |
| return list_empty(bag); |
| } |
| |
| int bag_add(bag_t *bag, void *ptr) |
| { |
| bag1_t *b = malloc(sizeof(*b)); |
| if (!b) |
| return -ENOMEM; |
| b->ptr = ptr; |
| list_add_tail(&b->list, bag); |
| return 0; |
| } |
| |
| int bag_del(bag_t *bag, void *ptr) |
| { |
| struct list_head *pos; |
| list_for_each(pos, bag) { |
| bag1_t *b = list_entry(pos, bag1_t, list); |
| if (b->ptr == ptr) { |
| list_del(&b->list); |
| free(b); |
| return 0; |
| } |
| } |
| return -ENOENT; |
| } |
| |
| void bag_del_all(bag_t *bag) |
| { |
| while (!list_empty(bag)) |
| list_del(bag->next); |
| } |