add a simplified vlist type

1 files changed, 40 insertions, 0 deletions

diff --git a/utils.c b/utils.c
index ba31b64..0b80064 100644
--- a/utils.c
+++ b/utils.c
@@ -1,4 +1,5 @@
 #include <string.h>
+#include <stdlib.h>
 #include "utils.h"
 
 int
@@ -70,3 +71,42 @@ vlist_flush_all(struct vlist_tree *tree)
 	tree->version++;
 	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)
+			continue;
+
+		vlist_simple_delete(tree, n);
+	}
+}
+
+void
+vlist_simple_flush_all(struct vlist_simple_tree *tree)
+{
+	tree->version++;
+	vlist_simple_flush(tree);
+}