Index: src/libcfa/concurrency/coroutine
===================================================================
--- src/libcfa/concurrency/coroutine	(revision 4aa2fb2fad2ee92eaf9a9a953a06997b44a330f0)
+++ src/libcfa/concurrency/coroutine	(revision 24fc19688618328ea503581fcc728ac1d5b9a622)
@@ -63,5 +63,5 @@
 
 // Get current coroutine
-coroutine_desc * this_coroutine(void);
+extern volatile thread_local coroutine_desc * this_coroutine;
 
 // Private wrappers for context switch and stack creation
@@ -71,5 +71,5 @@
 // Suspend implementation inlined for performance
 static inline void suspend() {
-	coroutine_desc * src = this_coroutine();		// optimization
+	coroutine_desc * src = this_coroutine;		// optimization
 
 	assertf( src->last != 0,
@@ -88,5 +88,5 @@
 forall(dtype T | is_coroutine(T))
 static inline void resume(T * cor) {
-	coroutine_desc * src = this_coroutine();		// optimization
+	coroutine_desc * src = this_coroutine;		// optimization
 	coroutine_desc * dst = get_coroutine(cor);
 
@@ -112,5 +112,5 @@
 
 static inline void resume(coroutine_desc * dst) {
-	coroutine_desc * src = this_coroutine();		// optimization
+	coroutine_desc * src = this_coroutine;		// optimization
 
 	// not resuming self ?