Index: layer_ui.h
===================================================================
--- layer_ui.h	(revision 5611)
+++ layer_ui.h	(revision 5612)
@@ -26,3 +26,24 @@
 
 /* Virtual layers for UI and debug */
 #include "layer.h"
+
+/* layer vector:  Elem=pcb_layer_t *; init=0 */
+#define GVT(x) vtlayer_ ## x
+#define GVT_ELEM_TYPE pcb_layer_t
+#define GVT_SIZE_TYPE size_t
+#define GVT_DOUBLING_THRS 64
+#define GVT_START_SIZE 4
+#define GVT_FUNC
+#define GVT_SET_NEW_BYTES_TO 0
+#include <genvector/genvector_impl.h>
+#define GVT_REALLOC(vect, ptr, size)  realloc(ptr, size)
+#define GVT_FREE(vect, ptr)           free(ptr)
+#include <genvector/genvector_undef.h>
+
+/* list of all UI layers */
+extern vtlayer_t pcb_uilayer;
+
+pcb_layer_t *pcb_uilayer_alloc(const char *cookie, const char *name, const char *color);
+void pcb_uilayer_free_all_cookie(const char *cookie);
+
+