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https://github.com/alsa-project/alsa-lib.git
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73 lines
1.6 KiB
C
73 lines
1.6 KiB
C
/*
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* Bag of pointers
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* Copyright (c) 2001 by Abramo Bagnara <abramo@alsa-project.org>
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*
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*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* 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 Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#include "mixer_local.h"
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int bag_new(bag_t **bag)
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{
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bag_t *b = malloc(sizeof(*b));
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if (!b)
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return -ENOMEM;
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INIT_LIST_HEAD(b);
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*bag = b;
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return 0;
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}
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void bag_free(bag_t *bag)
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{
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assert(list_empty(bag));
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free(bag);
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}
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int bag_empty(bag_t *bag)
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{
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return list_empty(bag);
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}
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int bag_add(bag_t *bag, void *ptr)
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{
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bag1_t *b = malloc(sizeof(*b));
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if (!b)
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return -ENOMEM;
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b->ptr = ptr;
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list_add_tail(&b->list, bag);
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return 0;
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}
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int bag_del(bag_t *bag, void *ptr)
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{
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struct list_head *pos;
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list_for_each(pos, bag) {
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bag1_t *b = list_entry(pos, bag1_t, list);
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if (b->ptr == ptr) {
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list_del(&b->list);
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free(b);
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return 0;
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}
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}
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return -ENOENT;
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}
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void bag_del_all(bag_t *bag)
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{
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while (!list_empty(bag))
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list_del(bag->next);
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}
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