vlist.h

   1 /*
   2  * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #ifndef __LIBUBOX_VLIST_H
  18 #define __LIBUBOX_VLIST_H
  19
  20 #include "avl.h"
  21
  22 struct vlist_tree;
  23 struct vlist_node;
  24
  25 typedef void (*vlist_update_cb)(struct vlist_tree *tree,
  26                                 struct vlist_node *node_new,
  27                                 struct vlist_node *node_old);
  28
  29 struct vlist_tree {
  30         struct avl_tree avl;
  31
  32         vlist_update_cb update;
  33         bool keep_old;
  34         bool no_delete;
  35
  36         int version;
  37 };
  38
  39 struct vlist_node {
  40         struct avl_node avl;
  41         int version;
  42 };
  43
  44 void vlist_init(struct vlist_tree *tree, avl_tree_comp cmp, vlist_update_cb update);
  45
  46 #define vlist_find(tree, name, element, node_member) \
  47         avl_find_element(&(tree)->avl, name, element, node_member.avl)
  48
  49 static inline void vlist_update(struct vlist_tree *tree)
  50 {
  51         tree->version++;
  52 }
  53
  54 void vlist_add(struct vlist_tree *tree, struct vlist_node *node, void *key);
  55 void vlist_delete(struct vlist_tree *tree, struct vlist_node *node);
  56 void vlist_flush(struct vlist_tree *tree);
  57 void vlist_flush_all(struct vlist_tree *tree);
  58
  59 #define vlist_for_each_element(tree, element, node_member) \
  60         avl_for_each_element(&(tree)->avl, element, node_member.avl)
  61
  62 #endif