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/*
* netifd - network interface daemon
* Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation
*
* 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 General Public License for more details.
*/
#include <string.h>
#include <stdlib.h>
#include "utils.h"
int
avl_strcmp(const void *k1, const void *k2, void *ptr)
{
return strcmp(k1, k2);
}
void
vlist_init(struct vlist_tree *tree, avl_tree_comp cmp, vlist_update_cb update)
{
tree->update = update;
tree->version = 1;
avl_init(&tree->avl, cmp, 0, tree);
}
void
vlist_delete(struct vlist_tree *tree, struct vlist_node *node)
{
if (!tree->no_delete)
avl_delete(&tree->avl, &node->avl);
tree->update(tree, NULL, node);
}
void
vlist_add(struct vlist_tree *tree, struct vlist_node *node, void *key)
{
struct vlist_node *old_node = NULL;
struct avl_node *anode;
node->avl.key = key;
node->version = tree->version;
anode = avl_find(&tree->avl, key);
if (anode) {
old_node = container_of(anode, struct vlist_node, avl);
if (tree->keep_old || tree->no_delete) {
old_node->version = tree->version;
goto update_only;
}
avl_delete(&tree->avl, anode);
}
avl_insert(&tree->avl, &node->avl);
update_only:
tree->update(tree, node, old_node);
}
void
vlist_flush(struct vlist_tree *tree)
{
struct vlist_node *node, *tmp;
avl_for_each_element_safe(&tree->avl, node, avl, tmp) {
if ((node->version == tree->version || node->version == -1) &&
tree->version != -1)
continue;
vlist_delete(tree, node);
}
}
void
vlist_flush_all(struct vlist_tree *tree)
{
tree->version = -1;
vlist_flush(tree);
}
void
__vlist_simple_init(struct vlist_simple_tree *tree, int offset)
{
INIT_LIST_HEAD(&tree->list);
tree->version = 1;
tree->head_offset = offset;
}
void
vlist_simple_delete(struct vlist_simple_tree *tree, struct vlist_simple_node *node)
{
char *ptr;
list_del(&node->list);
ptr = (char *) node - tree->head_offset;
free(ptr);
}
void
vlist_simple_flush(struct vlist_simple_tree *tree)
{
struct vlist_simple_node *n, *tmp;
list_for_each_entry_safe(n, tmp, &tree->list, list) {
if ((n->version == tree->version || n->version == -1) &&
tree->version != -1)
continue;
vlist_simple_delete(tree, n);
}
}
void
vlist_simple_replace(struct vlist_simple_tree *dest, struct vlist_simple_tree *old)
{
struct vlist_simple_node *n, *tmp;
list_for_each_entry_safe(n, tmp, &old->list, list) {
list_del(&n->list);
vlist_simple_add(dest, n);
}
}
void
vlist_simple_flush_all(struct vlist_simple_tree *tree)
{
tree->version = -1;
vlist_simple_flush(tree);
}
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