--- libaitsched/inc/defs.h	2015/07/02 22:45:00	1.15
+++ libaitsched/inc/defs.h	2015/07/22 19:50:45	1.16
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@openbsd-bg.org>
 *
 * $Author: misho $
-* $Id: defs.h,v 1.15 2015/07/02 22:45:00 misho Exp $
+* $Id: defs.h,v 1.16 2015/07/22 19:50:45 misho Exp $
 *
 **************************************************************************
 The ELWIX and AITNET software is distributed under the following
@@ -94,6 +94,7 @@ SUCH DAMAGE.
 #define pthread_mutex_unlock(x)
 #endif
 
+#define SCHED_QTRYLOCK(r, x)		pthread_mutex_trylock(&(r)->root_mtx[(x)])
 #define SCHED_QLOCK(r, x)		pthread_mutex_lock(&(r)->root_mtx[(x)])
 #define SCHED_QUNLOCK(r, x)		pthread_mutex_unlock(&(r)->root_mtx[(x)])