2 * Copyright (C) 2011 Felix Fietkau <nbd@openwrt.org>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU Lesser General Public License version 2.1
6 * as published by the Free Software Foundation
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
22 static int random_fd = -1;
24 static int ubus_cmp_id(const void *k1, const void *k2, void *ptr)
26 const uint32_t *id1 = k1, *id2 = k2;
34 static int ubus_cmp_str(const void *k1, const void *k2, void *ptr)
36 return strcmp(k1, k2);
39 void ubus_init_string_tree(struct avl_tree *tree, bool dup)
41 avl_init(tree, ubus_cmp_str, dup, NULL);
44 void ubus_init_id_tree(struct avl_tree *tree)
47 random_fd = open("/dev/urandom", O_RDONLY);
54 avl_init(tree, ubus_cmp_id, false, NULL);
57 bool ubus_alloc_id(struct avl_tree *tree, struct ubus_id *id, uint32_t val)
59 id->avl.key = &id->id;
62 return avl_insert(tree, &id->avl) == 0;
66 if (read(random_fd, &id->id, sizeof(id->id)) != sizeof(id->id))
69 if (id->id < UBUS_SYSTEM_OBJECT_MAX)
71 } while (avl_insert(tree, &id->avl) != 0);