From 8e2b36d43d8ec6063344e9f524796493f32084e7 Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Mon, 27 Dec 2021 11:24:21 -0700
Subject: [PATCH] triggerbox: NOOP: add explanatory comment

---
 libs/ardour/triggerbox.cc | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libs/ardour/triggerbox.cc b/libs/ardour/triggerbox.cc
index 93bfa5dc36..737f39c835 100644
--- a/libs/ardour/triggerbox.cc
+++ b/libs/ardour/triggerbox.cc
@@ -1834,6 +1834,11 @@ TriggerBox::maybe_swap_pending (uint32_t slot)
 		if (p == Trigger::MagicClearPointerValue) {
 			all_triggers[slot]->clear_region ();
 		} else {
+			/* Note use of a custom delete function. We cannot
+			   delete the old trigger from the RT context where the
+			   trigger swap will happen, so we will ask the trigger
+			   helper thread to take care of it.
+			*/
 			all_triggers[slot].reset (p, Trigger::request_trigger_delete);
 			TriggerSwapped (slot); /* EMIT SIGNAL */
 		}