/* * Bag of pointers * Copyright (c) 2001 by Abramo Bagnara * * * 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); }