X-Git-Url: http://git.tuebingen.mpg.de/?a=blobdiff_plain;f=buffer_tree.c;h=1a6b6e60d3f977d2d99f600d7a872a1b95250312;hb=764e787bc065694b2e9b05159a92104d585f59eb;hp=5d8e33fc17748dc1347af4f1ec57f15a8b662741;hpb=33c1c9a440ba25e8c4c4988d8811402fb29afb0f;p=paraslash.git

diff --git a/buffer_tree.c b/buffer_tree.c
index 5d8e33fc..1a6b6e60 100644
--- a/buffer_tree.c
+++ b/buffer_tree.c
@@ -137,6 +137,17 @@ void btr_pushdown(struct btr_node *btrn)
 		btr_pushdown_br(br, btrn);
 }
 
+int btr_pushdown_one(struct btr_node *btrn)
+{
+	struct btr_buffer_reference *br;
+
+	if (list_empty(&btrn->input_queue))
+		return 0;
+	br = list_first_entry(&btrn->input_queue, struct btr_buffer_reference, node);
+	btr_pushdown_br(br, btrn);
+	return 1;
+}
+
 /* Return true if this node has no children. */
 bool btr_no_children(struct btr_node *btrn)
 {