and now to debug some SIGSEGVs

crates/suil/Cargo.toml

@@ -10,3 +10,4 @@ bindgen = "0.69.4"
 
 [dev-dependencies]
 winit = { version = "0.30.4", features = [ "x11" ] }
+livi = "0.7.4"

crates/suil/src/lib.rs

@@ -7,16 +7,11 @@ pub struct Host(*mut self::bound::SuilHost);
 
 pub struct Instance(*mut self::bound::SuilInstance);
 
-pub struct Controller(*mut self::bound::SuilController);
-
 impl Host {
     pub fn new () -> Self {
-        //let write = std::ptr::null();
-        //let index = std::ptr::null();
-        //let subscribe = std::ptr::null();
-        //let unsubscribe = std::ptr::null();
         Self(unsafe {
-            bound::suil_init(&mut 0, std::ptr::null_mut(), 0);
+            let argv = &mut [] as *mut *mut *mut i8;
+            bound::suil_init(&mut 0, argv, 0);
             bound::suil_host_new(
                 Some(Self::write),
                 Some(Self::index),
@@ -40,9 +35,9 @@ impl Host {
     fn set_touch_func (&self) {
         unimplemented!();
     }
-    fn instance (
+    fn instance <T> (
         &self,
-        controller:         &Controller,
+        controller:         &mut T,
         container_type_uri: &str,
         plugin_uri:         &str,
         ui_uri:             &str,
@@ -60,7 +55,7 @@ impl Host {
         Ok(Instance(unsafe {
             bound::suil_instance_new(
                 self.0,
-                *controller.0,
+                controller as *mut _ as *mut std::ffi::c_void,
                 container_type_uri.into_raw(),
                 plugin_uri.into_raw(),
                 ui_uri.into_raw(),
@@ -88,3 +83,7 @@ impl Drop for Instance {
         }
     }
 }
+
+unsafe impl Send for Instance {}
+
+unsafe impl Sync for Instance {}

crates/suil/src/test.rs

@@ -1,13 +1,26 @@
 use crate::*;
+use std::sync::Arc;
 
 #[test]
 fn panics () {
     let host = Host::new();
-    self::ui::UI::run().join();
+    let mut plugin = plugin::LV2Plugin::new("file:///home/user/.lv2/Odin2.lv2").unwrap();
+    let instance = Arc::new(host.instance(
+        &mut plugin,
+        "",
+        "https://thewavewarden.com/odin2",
+        "https://thewavewarden.com/odin2#ParentUI",
+        "",
+        "",
+        "/home/user/.lv2/Odin2.lv2/Odin2.so",
+        &[],
+    ).unwrap());
+    self::ui::UI::run(&instance).join();
     panic!();
 }
 
 mod ui {
+    use std::sync::Arc;
     use std::thread::{spawn, JoinHandle};
     use ::winit::{
         application::ApplicationHandler,
@@ -16,11 +29,20 @@ mod ui {
         window::{Window, WindowId},
         platform::x11::EventLoopBuilderExtX11
     };
-    pub struct UI(Option<Window>);
+    use crate::{Host, Instance};
+    pub struct UI {
+        host: Arc<Instance>,
+        window: Option<Window>
+    }
     impl UI {
-        pub fn new () -> Self { Self(None) }
-        pub fn run () -> JoinHandle<()> {
-            let mut ui = Self::new();
+        pub fn new (host: &Arc<Instance>) -> Self {
+            Self {
+                host: host.clone(),
+                window: None
+            }
+        }
+        pub fn run (host: &Arc<Instance>) -> JoinHandle<()> {
+            let mut ui = Self::new(host);
             spawn(move||{
                 let event_loop = EventLoop::builder().with_x11().with_any_thread(true).build().unwrap();
                 event_loop.set_control_flow(ControlFlow::Wait);
@@ -30,19 +52,83 @@ mod ui {
     }
     impl ApplicationHandler for UI {
         fn resumed (&mut self, event_loop: &ActiveEventLoop) {
-            self.0 = Some(event_loop.create_window(Window::default_attributes()).unwrap());
+            self.window = Some(event_loop.create_window(Window::default_attributes()).unwrap());
         }
         fn window_event (&mut self, event_loop: &ActiveEventLoop, id: WindowId, event: WindowEvent) {
             match event {
                 WindowEvent::CloseRequested => {
-                    self.0.as_ref().unwrap().set_visible(false);
+                    self.window.as_ref().unwrap().set_visible(false);
                     event_loop.exit();
                 },
                 WindowEvent::RedrawRequested => {
-                    self.0.as_ref().unwrap().request_redraw();
+                    self.window.as_ref().unwrap().request_redraw();
                 }
                 _ => (),
             }
         }
     }
 }
+
+mod plugin {
+    use std::thread::JoinHandle;
+    use std::sync::Arc;
+    use ::livi::{
+        World,
+        Instance,
+        Plugin as LiviPlugin,
+        Features,
+        FeaturesBuilder,
+        Port,
+        event::LV2AtomSequence,
+    };
+    /// A LV2 plugin.
+    pub struct LV2Plugin {
+        pub world:        World,
+        pub instance:     Instance,
+        pub plugin:       LiviPlugin,
+        pub features:     Arc<Features>,
+        pub port_list:    Vec<Port>,
+        pub input_buffer: Vec<LV2AtomSequence>,
+        pub ui_thread:    Option<JoinHandle<()>>,
+    }
+
+    impl LV2Plugin {
+        pub fn new (uri: &str) -> Result<Self, Box<dyn std::error::Error>> {
+            // Get 1st plugin at URI
+            let world    = World::with_load_bundle(&uri);
+            let features = FeaturesBuilder { min_block_length: 1, max_block_length: 65536 };
+            let features = world.build_features(features);
+            let mut plugin = None;
+            for p in world.iter_plugins() {
+                plugin = Some(p);
+                break
+            }
+            if plugin.is_none() {
+                return Err(format!("plugin not found: {uri}").into())
+            }
+            let plugin = plugin.unwrap();
+            let err = &format!("init {uri}");
+
+            // Instantiate
+            Ok(Self {
+                world,
+                instance: unsafe {
+                    plugin
+                        .instantiate(features.clone(), 48000.0)
+                        .expect(&err)
+                },
+                port_list: {
+                    let mut port_list = vec![];
+                    for port in plugin.ports() {
+                        port_list.push(port);
+                    }
+                    port_list
+                },
+                plugin,
+                features,
+                input_buffer: Vec::with_capacity(1024),
+                ui_thread: None
+            })
+        }
+    }
+}