--- gvpe/src/util.h	2011/03/08 17:33:31	1.29
+++ gvpe/src/util.h	2011/03/08 17:34:26	1.30
@@ -154,6 +154,8 @@
 
 /*****************************************************************************/
 
+// run work_cb in another thread, call done_cb in main thread when finished
+// only one work_cb will execute at any one time.
 void async (callback<void ()> work_cb, callback<void ()> done_cb);
 
 #endif