Share one graph runtime between the editor api scope and the executor

node-graph/libraries/application-io/src/lib.rs

@@ -112,6 +112,7 @@ pub struct EditorApi<Io> {
 	pub node_graph_message_sender: Box<dyn NodeGraphUpdateSender + Send + Sync>,
 	/// Editor preferences made available to the graph through the `PlatformEditorApi`.
 	pub editor_preferences: Box<dyn GetEditorPreferences + Send + Sync>,
+	pub runtime: core_types::runtime::RuntimeHandle,
 }
 
 impl<Io> Eq for EditorApi<Io> {}
@@ -122,6 +123,7 @@ impl<Io: Default> Default for EditorApi<Io> {
 			application_io: None,
 			node_graph_message_sender: Box::new(Logger),
 			editor_preferences: Box::new(DummyPreferences),
+			runtime: Default::default(),
 		}
 	}
 }

node-graph/libraries/core-types/src/runtime.rs

@@ -36,6 +36,34 @@ pub trait Spawner {
 	fn spawn(&self, task: SourceFuture);
 }
 
+#[cfg(not(target_family = "wasm"))]
+pub type DynSpawner = dyn Spawner + Send + Sync;
+#[cfg(target_family = "wasm")]
+pub type DynSpawner = dyn Spawner;
+
+impl<S: Spawner + ?Sized> Spawner for Box<S> {
+	fn spawn(&self, task: SourceFuture) {
+		(**self).spawn(task)
+	}
+}
+
+/// Dropped tasks never complete.
+pub struct NoopSpawner;
+
+impl Spawner for NoopSpawner {
+	fn spawn(&self, _task: SourceFuture) {
+		log::warn!("async source spawned before a host spawner is wired; the task is dropped");
+	}
+}
+
+pub type DynGraphRuntime = GraphRuntime<Box<DynSpawner>>;
+
+impl Default for RuntimeHandle {
+	fn default() -> Self {
+		Self(Arc::new(GraphRuntime::new(Box::new(NoopSpawner) as Box<DynSpawner>)))
+	}
+}
+
 pub struct GraphRuntime<S> {
 	generations: Arc<Mutex<HashMap<SourceId, u64>>>,
 	dirty: Arc<AtomicBool>,