diff -r 14722c5f8856 -r 74babc0082b7 src/server/ucx/ucx.h
--- a/src/server/ucx/ucx.h	Wed May 22 15:05:06 2013 +0200
+++ b/src/server/ucx/ucx.h	Sun May 26 12:12:07 2013 +0200
@@ -1,8 +1,29 @@
-/* 
- * File:   ucx.h
- * Author: olaf
+/*
+ * 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.
  *
- * Created on 31. Dezember 2011, 17:17
+ *   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 UCX_H
@@ -11,18 +32,28 @@
 #include <stdlib.h>
 
 #ifdef	__cplusplus
+#ifndef _Bool
+#define _Bool bool
+#define restrict
+#endif
 extern "C" {
 #endif
 
 #define UCX_FOREACH(type,list,elem) \
         for (type elem = list ; elem != NULL ; elem = elem->next)
-    
+
 /* element1,element2,custom data -> {-1,0,1} */
 typedef int(*cmp_func)(void*,void*,void*);
 
 /* element,custom data -> copy of element */
 typedef void*(*copy_func)(void*,void*);
 
+/* buffer, element size, element count, stream */
+typedef size_t(*write_func)(const void*, size_t, size_t, void*);
+
+/* buffer, element size, element count, stream */
+typedef size_t(*read_func)(void*, size_t, size_t, void*);
+
 #ifdef	__cplusplus
 }
 #endif