Index: uspace/lib/c/generic/private/async.h
===================================================================
--- uspace/lib/c/generic/private/async.h	(revision 47b70062180b321b58ca43746901c748ff7a6b2d)
+++ uspace/lib/c/generic/private/async.h	(revision 91b673d89f44c1de6cf380426c6b7fa01bd3cbc1)
@@ -79,6 +79,20 @@
 } awaiter_t;
 
+/** Message data */
+typedef struct {
+	awaiter_t wdata;
+	
+	/** If reply was received. */
+	bool done;
+	
+	/** Pointer to where the answer data is stored. */
+	ipc_call_t *dataptr;
+	
+	sysarg_t retval;
+} amsg_t;
+
 extern void __async_init(void);
 extern void async_insert_timeout(awaiter_t *);
+extern void reply_received(void *, int, ipc_call_t *);
 
 #endif