feat: mvp actor ring test

examples/hello.rs

@@ -13,7 +13,9 @@ struct GreetMessage {
     /// who do we send out greeting back to?
     return_addr: ActorAddress,
 }
-impl Message for GreetMessage {}
+
+#[derive(Debug, Default, Clone)]
+struct GreetResponse(String);
 
 impl ActorInterface for Greeter {
     type Incoming = GreetMessage;
@@ -29,9 +31,6 @@ impl ActorInterface for Greeter {
     }
 }
 
-#[derive(Debug, Default, Clone)]
-struct GreetResponse(String);
-impl Message for GreetResponse {}
 
 fn main() {
     let mut rt = Runtime::new(100, Some(RuntimeFlavor::SingleThreaded));

examples/ring.rs

@@ -0,0 +1,65 @@
+use swactor::{ActorAddress, ActorInterface, Inbox, Runtime, RuntimeFlavor};
+
+#[derive(Debug, Default, Clone)]
+struct RingMessage {
+    count: usize,
+}
+
+impl RingMessage {
+    pub fn next(self) -> Self {
+        Self {
+            count: self.count + 1,
+        }
+    }
+}
+
+#[derive(Debug, Default)]
+struct RingActor {
+    next: ActorAddress,
+}
+
+impl RingActor {
+    pub fn new(next: ActorAddress) -> Self {
+        Self { next }
+    }
+}
+
+impl ActorInterface for RingActor {
+    type Incoming = RingMessage;
+    type Response = ();
+    fn handle(&mut self, ctx: &Runtime, msg: Self::Incoming) {
+        if let Err(_) = ctx.send_to(self.next, msg.next()) {
+            // do nothing
+        }
+    }
+}
+
+fn main() {
+    let mut rt = Runtime::new(10_000, Some(RuntimeFlavor::SingleThreaded));
+    let inbox: Inbox<RingMessage> = rt.new_inbox();
+
+    let mut next = rt
+        .spawn(RingActor::new(*inbox.addr()))
+        .expect("failed to spawn");
+    for _ in 0..500 {
+        let new = rt.spawn(RingActor::new(next)).expect("failed to spawn");
+        next = new;
+    }
+    rt.send_to(next, RingMessage { count: 0 })
+        .expect("failed to start message ring");
+
+    let msg: RingMessage;
+    loop {
+        match inbox.try_recv() {
+            Some(m) => {
+                msg = m;
+                break;
+            }
+            None => {
+                rt.tick();
+            }
+        }
+    }
+
+    println!("{msg:?}")
+}

src/lib.rs

@@ -20,9 +20,11 @@ pub fn get_random(buf: &mut [u8]) {
 ///     process total_messages // 2
 const WATERLEVEL: usize = 10;
 
-const DEFAULT_INBOX_CAPACITY: usize = 100;
+const DEFAULT_INBOX_CAPACITY: usize = 1_000;
 
 pub trait Message: 'static + Sized + Clone + Send {}
+impl<T: 'static + Sized + Clone + Send> Message for T {}
+
 pub type Envelope = Box<dyn std::any::Any + Send>;
 
 pub trait ActorInterface: 'static + Send {