lots of details relating to MIDI file management; try to ignore ALSA sequencer MIDI ports named "Midi-Through"

git-svn-id: svn://localhost/ardour2/branches/3.0@7305 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 14 insertions, 0 deletions

diff --git a/libs/ardour/source.cc b/libs/ardour/source.cc
index 55ce9f8bef..894233f436 100644
--- a/libs/ardour/source.cc
+++ b/libs/ardour/source.cc
@@ -272,3 +272,17 @@ Source::set_allow_remove_if_empty (bool yn)
 	}
 }
 
+void
+Source::dec_use_count ()
+{
+#ifndef NDEBUG
+        gint oldval = g_atomic_int_exchange_and_add (&_use_count, -1);
+        cerr << "Bad use dec for " << name() << endl;
+        if (oldval <= 0) {
+                abort ();
+        }
+        assert (oldval > 0);
+#else 
+        g_atomic_int_exchange_and_add (&_use_count, -1);
+#endif
+}