async_engine: move toplevel scheduler into crate

src/utils.rs

@@ -89,7 +89,9 @@ pub mod linkedlist;
 pub mod line_logger;
 pub mod object_drop_queue;
 pub mod pending_serial;
-pub mod run_toplevel;
+pub mod run_toplevel {
+    pub use jay_async_engine::RunToplevel;
+}
 pub mod scroller;
 pub mod timer;
 

src/utils/run_toplevel.rs

@@ -1,46 +0,0 @@
-use {
-    crate::{
-        async_engine::{AsyncEngine, SpawnedFuture},
-        utils::queue::AsyncQueue,
-    },
-    std::rc::Rc,
-};
-
-pub struct RunToplevelFuture {
-    _future: SpawnedFuture<()>,
-}
-
-pub struct RunToplevel {
-    queue: AsyncQueue<Box<dyn FnOnce()>>,
-}
-
-impl RunToplevel {
-    pub fn install(eng: &Rc<AsyncEngine>) -> (RunToplevelFuture, Rc<RunToplevel>) {
-        let slf = Rc::new(RunToplevel {
-            queue: Default::default(),
-        });
-        let future = eng.spawn("run toplevel", {
-            let slf = slf.clone();
-            async move {
-                loop {
-                    let f = slf.queue.pop().await;
-                    f();
-                }
-            }
-        });
-        let future = RunToplevelFuture { _future: future };
-        (future, slf)
-    }
-
-    pub fn schedule<F: FnOnce() + 'static>(&self, f: F) {
-        self.schedule_dyn(Box::new(f));
-    }
-
-    pub fn clear(&self) {
-        self.queue.clear();
-    }
-
-    fn schedule_dyn(&self, f: Box<dyn FnOnce()>) {
-        self.queue.push(f);
-    }
-}