X-Git-Url: https://git.archive.openwrt.org/?p=project%2Fnetifd.git;a=blobdiff_plain;f=utils.c;h=e5f3d89b3df39dfbcbcdb90a68ad5430de9f3098;hp=cf0718a1d598385da33eb2fc0388a0d8d390ad90;hb=9b40d469c858d9ce4cacfa0aca37ba2ac69d2f96;hpb=3492219e211678c56b48d3f544cb0c0da9d606a0

diff --git a/utils.c b/utils.c
index cf0718a..e5f3d89 100644
--- a/utils.c
+++ b/utils.c
@@ -1,8 +1,113 @@
 #include <string.h>
+#include <stdlib.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)
+{
+	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_flush_all(struct vlist_simple_tree *tree)
+{
+	tree->version = -1;
+	vlist_simple_flush(tree);
+}