Index: src/libcfa/concurrency/threads
===================================================================
--- src/libcfa/concurrency/threads	(revision 0e76cf4f08013d765530952465f1547e8fd011e2)
+++ src/libcfa/concurrency/threads	(revision 0e76cf4f08013d765530952465f1547e8fd011e2)
@@ -0,0 +1,34 @@
+//
+// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
+//
+// The contents of this file are covered under the licence agreement in the
+// file "LICENCE" distributed with Cforall.
+//
+// fstream --
+//
+// Author           : Peter A. Buhr
+// Created On       : Wed May 27 17:56:53 2015
+// Last Modified By : Peter A. Buhr
+// Last Modified On : Thu Apr 28 08:08:04 2016
+// Update Count     : 88
+//
+
+#ifndef __THREADS_H__
+#define __THREADS_H__
+
+
+struct coroutine {
+      int blarg;
+};
+
+trait coroutine_t(dtype T) {
+      coroutine* this_coroutine(T* this);
+};
+
+forall(dtype T | coroutine_t(T))
+void suspend(T* cor);
+
+forall(dtype T | coroutine_t(T))
+void resume(T* cor);
+
+#endif //__THREADS_H__
Index: src/libcfa/concurrency/threads.c
===================================================================
--- src/libcfa/concurrency/threads.c	(revision 0e76cf4f08013d765530952465f1547e8fd011e2)
+++ src/libcfa/concurrency/threads.c	(revision 0e76cf4f08013d765530952465f1547e8fd011e2)
@@ -0,0 +1,11 @@
+#include "threads"
+
+forall(dtype T | coroutine_t(T))
+void suspend(T* cor) {
+
+}
+
+forall(dtype T | coroutine_t(T))
+void resume(T* cor) {
+
+}