diff -r 4e6e812c1d97 -r 069c152f6272 src/server/ucx/dlist.h
--- a/src/server/ucx/dlist.h	Thu Jun 20 14:07:46 2013 +0200
+++ b/src/server/ucx/dlist.h	Fri Jun 21 12:10:44 2013 +0200
@@ -1,5 +1,29 @@
-/* 
- * 
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright 2013 Olaf Wintermann. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *
+ *   2. Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in the
+ *      documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef DLIST_H
@@ -20,20 +44,22 @@
 };
 
 UcxDlist *ucx_dlist_clone(UcxDlist *l, copy_func fnc, void* data);
-int ucx_dlist_equals(UcxDlist *l1, UcxDlist *l2, cmp_func fnc, void* data);
+int ucx_dlist_equals(const UcxDlist *l1, const UcxDlist *l2,
+        cmp_func fnc, void* data);
 
 void ucx_dlist_free(UcxDlist *l);
 UcxDlist *ucx_dlist_append(UcxDlist *l, void *data);
 UcxDlist *ucx_dlist_prepend(UcxDlist *l, void *data);
 UcxDlist *ucx_dlist_concat(UcxDlist *l1, UcxDlist *l2);
-UcxDlist *ucx_dlist_last(UcxDlist *l);
-UcxDlist *ucx_dlist_get(UcxDlist *l, int index);
-size_t ucx_dlist_size(UcxDlist *l);
+UcxDlist *ucx_dlist_last(const UcxDlist *l);
+UcxDlist *ucx_dlist_get(const UcxDlist *l, int index);
+size_t ucx_dlist_size(const UcxDlist *l);
+int ucx_dlist_contains(UcxDlist *l, void *elem, cmp_func fnc, void *cmpdata);
 
 UcxDlist *ucx_dlist_sort(UcxDlist *l, cmp_func fnc, void *data);
 
 /* dlist specific functions */
-UcxDlist *ucx_dlist_first(UcxDlist *l);
+UcxDlist *ucx_dlist_first(const UcxDlist *l);
 UcxDlist *ucx_dlist_remove(UcxDlist *l, UcxDlist *e);
 
 #ifdef	__cplusplus