Index: libcfa/src/Makefile.am
===================================================================
--- libcfa/src/Makefile.am	(revision 76bf23c91ce652f59c3996bbd5df16c260e4c0a1)
+++ libcfa/src/Makefile.am	(revision 27273f99d1999079a576a73c4f6c18b5cbf02170)
@@ -48,5 +48,5 @@
 thread_headers_nosrc = concurrency/invoke.h
 thread_headers = concurrency/coroutine.hfa concurrency/thread.hfa concurrency/kernel.hfa concurrency/monitor.hfa concurrency/mutex.hfa
-thread_libsrc = concurrency/CtxSwitch-@ARCHITECTURE@.S concurrency/alarm.cfa concurrency/invoke.c concurrency/preemption.cfa ${thread_headers:.hfa=.cfa}
+thread_libsrc = concurrency/CtxSwitch-@ARCHITECTURE@.S concurrency/alarm.cfa concurrency/invoke.c concurrency/io.cfa concurrency/preemption.cfa ${thread_headers:.hfa=.cfa}
 else
 headers =
Index: libcfa/src/Makefile.in
===================================================================
--- libcfa/src/Makefile.in	(revision 76bf23c91ce652f59c3996bbd5df16c260e4c0a1)
+++ libcfa/src/Makefile.in	(revision 27273f99d1999079a576a73c4f6c18b5cbf02170)
@@ -164,8 +164,8 @@
 am__libcfathread_la_SOURCES_DIST =  \
 	concurrency/CtxSwitch-@ARCHITECTURE@.S concurrency/alarm.cfa \
-	concurrency/invoke.c concurrency/preemption.cfa \
-	concurrency/coroutine.cfa concurrency/thread.cfa \
-	concurrency/kernel.cfa concurrency/monitor.cfa \
-	concurrency/mutex.cfa
+	concurrency/invoke.c concurrency/io.cfa \
+	concurrency/preemption.cfa concurrency/coroutine.cfa \
+	concurrency/thread.cfa concurrency/kernel.cfa \
+	concurrency/monitor.cfa concurrency/mutex.cfa
 @BUILDLIB_TRUE@am__objects_3 = concurrency/coroutine.lo \
 @BUILDLIB_TRUE@	concurrency/thread.lo concurrency/kernel.lo \
@@ -174,5 +174,6 @@
 @BUILDLIB_TRUE@	concurrency/CtxSwitch-@ARCHITECTURE@.lo \
 @BUILDLIB_TRUE@	concurrency/alarm.lo concurrency/invoke.lo \
-@BUILDLIB_TRUE@	concurrency/preemption.lo $(am__objects_3)
+@BUILDLIB_TRUE@	concurrency/io.lo concurrency/preemption.lo \
+@BUILDLIB_TRUE@	$(am__objects_3)
 am_libcfathread_la_OBJECTS = $(am__objects_4)
 libcfathread_la_OBJECTS = $(am_libcfathread_la_OBJECTS)
@@ -474,5 +475,5 @@
 @BUILDLIB_FALSE@thread_headers = 
 @BUILDLIB_TRUE@thread_headers = concurrency/coroutine.hfa concurrency/thread.hfa concurrency/kernel.hfa concurrency/monitor.hfa concurrency/mutex.hfa
-@BUILDLIB_TRUE@thread_libsrc = concurrency/CtxSwitch-@ARCHITECTURE@.S concurrency/alarm.cfa concurrency/invoke.c concurrency/preemption.cfa ${thread_headers:.hfa=.cfa}
+@BUILDLIB_TRUE@thread_libsrc = concurrency/CtxSwitch-@ARCHITECTURE@.S concurrency/alarm.cfa concurrency/invoke.c concurrency/io.cfa concurrency/preemption.cfa ${thread_headers:.hfa=.cfa}
 
 #----------------------------------------------------------------------------------------------------------------
@@ -608,4 +609,6 @@
 	concurrency/$(DEPDIR)/$(am__dirstamp)
 concurrency/invoke.lo: concurrency/$(am__dirstamp) \
+	concurrency/$(DEPDIR)/$(am__dirstamp)
+concurrency/io.lo: concurrency/$(am__dirstamp) \
 	concurrency/$(DEPDIR)/$(am__dirstamp)
 concurrency/preemption.lo: concurrency/$(am__dirstamp) \