From c4696fe2d568bce461aa9f8b4fbc6be19b6113ae Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Wed, 29 Apr 2015 01:32:48 +0200
Subject: [PATCH] emit an xrun if the process_lock is taken

---
 libs/ardour/audioengine.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libs/ardour/audioengine.cc b/libs/ardour/audioengine.cc
index cdab68b2f5..67f1f15c4d 100644
--- a/libs/ardour/audioengine.cc
+++ b/libs/ardour/audioengine.cc
@@ -205,6 +205,7 @@ AudioEngine::process_callback (pframes_t nframes)
 
 	if (!tm.locked()) {
 		/* return having done nothing */
+		Xrun();
 		_processed_frames = next_processed_frames;
 		return 0;
 	}