From 0545775de677606152342d612d3258e074b01269 Mon Sep 17 00:00:00 2001
From: tildearrow <tildearrow@protonmail.com>
Date: Thu, 13 Jan 2022 17:40:29 -0500
Subject: [PATCH] prepare for better ins del safety

---
 src/engine/dispatch.h            | 5 +++++
 src/engine/engine.cpp            | 3 +++
 src/engine/platform/abstract.cpp | 4 ++++
 3 files changed, 12 insertions(+)

diff --git a/src/engine/dispatch.h b/src/engine/dispatch.h
index 63ed82162..2f33f0b60 100644
--- a/src/engine/dispatch.h
+++ b/src/engine/dispatch.h
@@ -196,6 +196,11 @@ class DivDispatch {
      */
     void setSkipRegisterWrites(bool value);
 
+    /**
+     * notify deletion of an instrument.
+     */
+    virtual void notifyInsDeletion(void* ins);
+
     /**
      * force-retrigger instruments.
      */
diff --git a/src/engine/engine.cpp b/src/engine/engine.cpp
index 73a7e7a67..b3bc72d4a 100644
--- a/src/engine/engine.cpp
+++ b/src/engine/engine.cpp
@@ -2706,6 +2706,9 @@ int DivEngine::addInstrument(int refChan) {
 void DivEngine::delInstrument(int index) {
   isBusy.lock();
   if (index>=0 && index<(int)song.ins.size()) {
+    for (int i=0; i<song.systemLen; i++) {
+      disCont[i].dispatch->notifyInsDeletion(song.ins[index]);
+    }
     delete song.ins[index];
     song.ins.erase(song.ins.begin()+index);
     song.insLen=song.ins.size();
diff --git a/src/engine/platform/abstract.cpp b/src/engine/platform/abstract.cpp
index c78815316..a313b2d0a 100644
--- a/src/engine/platform/abstract.cpp
+++ b/src/engine/platform/abstract.cpp
@@ -46,6 +46,10 @@ void DivDispatch::setSkipRegisterWrites(bool value) {
   skipRegisterWrites=value;
 }
 
+void DivDispatch::notifyInsDeletion(void* ins) {
+
+}
+
 void DivDispatch::forceIns() {
   
 }