util/list: Add list splicing functions
This adds functions for splicing one list into another. These have
more-or-less the same API as the kernel list splicing functions. The
implementation, however, was stolen from the Wayland list implementation.
Reviewed-by: Mark Janes <mark.a.janes@intel.com>
Reviewed-by: Rob Clark <robclark@freedesktop.org>
diff --git a/src/util/list.h b/src/util/list.h
index 066f9b8..f0dec5d 100644
--- a/src/util/list.h
+++ b/src/util/list.h
@@ -116,6 +116,28 @@
return length;
}
+static inline void list_splice(struct list_head *src, struct list_head *dst)
+{
+ if (list_empty(src))
+ return;
+
+ src->next->prev = dst;
+ src->prev->next = dst->next;
+ dst->next->prev = src->prev;
+ dst->next = src->next;
+}
+
+static inline void list_splicetail(struct list_head *src, struct list_head *dst)
+{
+ if (list_empty(src))
+ return;
+
+ src->prev->next = dst;
+ src->next->prev = dst->prev;
+ dst->prev->next = src->next;
+ dst->prev = src->prev;
+}
+
static inline void list_validate(struct list_head *list)
{
struct list_head *node;