+/*
+ * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+#include "vlist.h"
+
+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);
+}
+
+