1 files changed, 39 insertions, 1 deletions
diff --git a/mesalib/src/glsl/list.h b/mesalib/src/glsl/list.h
index 9f08d45f7..500a85717 100644
--- a/mesalib/src/glsl/list.h
+++ b/mesalib/src/glsl/list.h
@@ -333,6 +333,8 @@ struct exec_list {
    const exec_node *get_tail() const;
    exec_node *get_tail();
 
+   unsigned length() const;
+
    void push_head(exec_node *n);
    void push_tail(exec_node *n);
    void push_degenerate_list_at_head(exec_node *n);
@@ -353,9 +355,15 @@ struct exec_list {
    void move_nodes_to(exec_list *target);
 
    /**
-    * Append all nodes from the source list to the target list
+    * Append all nodes from the source list to the end of the target list
     */
    void append_list(exec_list *source);
+
+   /**
+    * Prepend all nodes from the source list to the beginning of the target
+    * list
+    */
+   void prepend_list(exec_list *source);
 #endif
 };
 
@@ -407,6 +415,19 @@ exec_list_get_tail(struct exec_list *list)
    return !exec_list_is_empty(list) ? list->tail_pred : NULL;
 }
 
+static inline unsigned
+exec_list_length(const struct exec_list *list)
+{
+   unsigned size = 0;
+   struct exec_node *node;
+
+   for (node = list->head; node->next != NULL; node = node->next) {
+      size++;
+   }
+
+   return size;
+}
+
 static inline void
 exec_list_push_head(struct exec_list *list, struct exec_node *n)
 {
@@ -487,6 +508,13 @@ exec_list_append(struct exec_list *list, struct exec_list *source)
 }
 
 static inline void
+exec_list_prepend(struct exec_list *list, struct exec_list *source)
+{
+   exec_list_append(source, list);
+   exec_list_move_nodes_to(source, list);
+}
+
+static inline void
 exec_node_insert_list_before(struct exec_node *n, struct exec_list *before)
 {
    if (exec_list_is_empty(before))
@@ -532,6 +560,11 @@ inline exec_node *exec_list::get_tail()
    return exec_list_get_tail(this);
 }
 
+inline unsigned exec_list::length() const
+{
+   return exec_list_length(this);
+}
+
 inline void exec_list::push_head(exec_node *n)
 {
    exec_list_push_head(this, n);
@@ -562,6 +595,11 @@ inline void exec_list::append_list(exec_list *source)
    exec_list_append(this, source);
 }
 
+inline void exec_list::prepend_list(exec_list *source)
+{
+   exec_list_prepend(this, source);
+}
+
 inline void exec_node::insert_before(exec_list *before)
 {
    exec_node_insert_list_before(this, before);