add vlist (from netifd)

1 files changed, 58 insertions, 0 deletions

diff --git a/vlist.h b/vlist.h
new file mode 100644
index 0000000..19c1c20
--- /dev/null
+++ b/vlist.h
@@ -0,0 +1,58 @@
+/*
+ * 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 "avl.h"
+
+struct vlist_tree;
+struct vlist_node;
+
+typedef void (*vlist_update_cb)(struct vlist_tree *tree,
+				struct vlist_node *node_new,
+				struct vlist_node *node_old);
+
+struct vlist_tree {
+	struct avl_tree avl;
+
+	vlist_update_cb update;
+	bool keep_old;
+	bool no_delete;
+
+	int version;
+};
+
+struct vlist_node {
+	struct avl_node avl;
+	int version;
+};
+
+void vlist_init(struct vlist_tree *tree, avl_tree_comp cmp, vlist_update_cb update);
+
+#define vlist_find(tree, name, element, node_member) \
+	avl_find_element(&(tree)->avl, name, element, node_member.avl)
+
+static inline void vlist_update(struct vlist_tree *tree)
+{
+	tree->version++;
+}
+
+void vlist_add(struct vlist_tree *tree, struct vlist_node *node, void *key);
+void vlist_delete(struct vlist_tree *tree, struct vlist_node *node);
+void vlist_flush(struct vlist_tree *tree);
+void vlist_flush_all(struct vlist_tree *tree);
+
+#define vlist_for_each_element(tree, element, node_member) \
+	avl_for_each_element(&(tree)->avl, element, node_member.avl)
+