-/** Lock just the model, the source lock must already be held.
- * This should only be called from libardour/evoral places
- */
-MidiModel::WriteLock
-MidiModel::write_lock()
-{
- boost::shared_ptr<MidiSource> ms = _midi_source.lock ();
- assert (ms);
+ if (ms) {
+ /* Take source lock and invalidate iterator to release its lock on model.
+ Add currently active notes to _active_notes so we can restore them
+ if playback resumes at the same point after the edit. */
+ source_lock = new Glib::Threads::Mutex::Lock(ms->mutex());
+ ms->invalidate(*source_lock,
+ ms->session().transport_rolling() ? &_active_notes : NULL);
+ }