X-Git-Url: http://git.archive.openwrt.org/?p=project%2Fnetifd.git;a=blobdiff_plain;f=utils.c;h=cc222908efa94a414dc650ec92680f0b9d38bafe;hp=cf0718a1d598385da33eb2fc0388a0d8d390ad90;hb=13ec81ce3e2f77504818de0bf89a2a1edd7e0ba2;hpb=3492219e211678c56b48d3f544cb0c0da9d606a0

diff --git a/utils.c b/utils.c
index cf0718a..cc22290 100644
--- a/utils.c
+++ b/utils.c
@@ -1,8 +1,71 @@
 #include <string.h>
 #include "utils.h"
 
-int avl_strcmp(const void *k1, const void *k2, void *ptr)
+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, int offset)
+{
+	tree->key_offset = offset;
+	tree->update = update;
+	tree->version = 1;
+
+	avl_init(&tree->avl, cmp, 0, tree);
+}
+
+void
+vlist_delete(struct vlist_tree *tree, struct vlist_node *node)
+{
+	avl_delete(&tree->avl, &node->avl);
+	tree->update(tree, NULL, node);
+}
+
+void
+vlist_add(struct vlist_tree *tree, struct vlist_node *node)
+{
+	struct vlist_node *old_node = NULL;
+	struct avl_node *anode;
+	void *key = (char *) node + tree->key_offset;
+
+	node->avl.key = key;
+	node->version = tree->version;
+
+	anode = avl_find(&tree->avl, key);
+	if (anode) {
+		if (tree->keep_old)
+			goto update_only;
+
+		old_node = container_of(anode, struct vlist_node, avl);
+		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)
+			continue;
+
+		vlist_delete(tree, node);
+	}
+}
+
+void
+vlist_flush_all(struct vlist_tree *tree)
+{
+	tree->version++;
+	vlist_flush(tree);
+}