Refine references and syncing

actor.ts

@@ -9,24 +9,38 @@ export type ExitReason = null | { ok: true } | { ok: false, err: Error };
 export const assert = Symbol('assert');
 export const retract = Symbol('retract');
 export const message = Symbol('message');
+export const sync = Symbol('sync');
 
 export interface Entity {
     [assert]?(turn: Turn, assertion: Assertion, handle: Handle): void;
     [retract]?(turn: Turn, handle: Handle): void;
-    [message]?(turn: Turn, message: Assertion): void;
+    [message]?(turn: Turn, body: Assertion): void;
+    [sync]?(turn: Turn, peer: Entity): void;
 }
 
-export class Ref {
-    readonly actor: Actor;
+export class Ref implements Entity {
+    readonly relay: Actor;
     readonly target: Entity;
 
-    constructor(actor: Actor, target: Entity) {
-        this.actor = actor;
+    constructor(relay: Actor, target: Entity) {
+        this.relay = relay;
         this.target = target;
     }
 
-    sync(turn: Turn, syncable: Ref) {
-        turn.enqueue(syncable.actor, t => t.message(syncable, true));
+    [assert](turn: Turn, assertion: Assertion, handle: Handle): void {
+        this.target[assert]?.(turn, assertion, handle);
+    }
+
+    [retract](turn: Turn, handle: Handle): void {
+        this.target[retract]?.(turn, handle);
+    }
+
+    [message](turn: Turn, body: Assertion): void {
+        this.target[message]?.(turn, body);
+    }
+
+    [sync](turn: Turn, peer: Ref) {
+        this.target[sync] ? this.target[sync]!(turn, peer) : turn.message(peer, true);
     }
 }
 
@@ -79,12 +93,12 @@ export class Turn {
         this.actor = actor;
     }
 
-    ref(t: Entity): Ref {
-        return new Ref(this.actor, t);
+    ref(e: Entity): Ref {
+        return (e instanceof Ref) ? e : new Ref(this.actor, e);
     }
 
     spawn(bootProc: LocalAction, initialAssertions = new IdentitySet<Handle>()): void {
-        this.tasks.push(() => {
+        this.enqueue(void 0, () => {
             const newOutbound: OutboundMap = new Map();
             initialAssertions.forEach(key => {
                 newOutbound.set(key, this.actor.outbound.get(key)!); // we trust initialAssertions
@@ -96,14 +110,14 @@ export class Turn {
     }
 
     quit(): void {
-        this.tasks.push(t => this.actor.terminateWith(t, { ok: true }));
+        this.enqueue(void 0, t => this.actor.terminateWith(t, { ok: true }));
     }
 
-    assert(location: Ref, assertion: Assertion): Handle {
+    assert(ref: Ref, assertion: Assertion): Handle {
         const h = nextHandle++;
-        this.enqueue(location.actor, t => {
-            this.actor.outbound.set(h, location);
-            location.target[assert]?.(t, assertion, h);
+        this.enqueue(ref.relay, t => {
+            this.actor.outbound.set(h, ref);
+            ref[assert]?.(t, assertion, h);
         });
         return h;
     }
@@ -112,29 +126,30 @@ export class Turn {
         this._retract(this.actor.outbound.get(h)!, h);
     }
 
-    replace(location: Ref, h: Handle | undefined, assertion: Assertion): Handle {
-        const newHandle = this.assert(location, assertion);
+    replace(ref: Ref, h: Handle | undefined, assertion: Assertion): Handle {
+        const newHandle = this.assert(ref, assertion);
         if (h !== void 0) this.retract(h);
         return newHandle;
     }
 
-    _retract(location: Ref, handle: Handle): void {
-        this.enqueue(location.actor, t => {
+    _retract(ref: Ref, handle: Handle): void {
+        this.enqueue(ref.relay, t => {
             this.actor.outbound.delete(handle);
-            location.target[retract]?.(t, handle);
+            ref[retract]?.(t, handle);
         });
     }
 
-    sync(loc: Ref): Promise<Turn> {
-        return new Promise(resolve => this.enqueue(loc.actor, t =>
-            loc.sync(t, this.ref({ [message]: resolve }))));
+    sync(ref: Ref): Promise<Turn> {
+        return new Promise(resolve =>
+            this.enqueue(ref.relay, t => ref[sync]?.(t, this.ref({ [message]: resolve }))));
     }
 
-    message(location: Ref, assertion: Assertion): void {
-        this.enqueue(location.actor, t => location.target[message]?.(t, assertion));
+    message(ref: Ref, assertion: Assertion): void {
+        this.enqueue(ref.relay, t => ref[message]?.(t, assertion));
     }
 
-    enqueue(actor: Actor, a: LocalAction): void {
-        this.queues.get(actor)?.push(a) ?? this.queues.set(actor, [a]);
+    enqueue(relay: Actor | undefined, a: LocalAction): void {
+        (relay === void 0) ? this.tasks.push(a)
+            : this.queues.get(relay)?.push(a) ?? this.queues.set(relay, [a]);
     }
 }

main.ts

@@ -59,7 +59,7 @@ let startTime = Date.now();
 let prevValue = 0;
 const LIMIT = 500000;
 Turn.for(new Actor(), async (t: Turn) => {
-    const ds = new Ref(new Actor(), new Dataspace());
+    const ds = t.ref(new Dataspace());
 
     // Box
     t.spawn(t => {
@@ -71,6 +71,7 @@ Turn.for(new Actor(), async (t: Turn) => {
         setValue(t, 0);
         t.assert(ds, Observe(SetBox.constructorInfo.label, t.ref({
             [message](t: Turn, [newValue]: [number]): void {
+                // console.log(`Box: got ${newValue}`);
                 if (newValue % 25000 === 0) {
                     const endTime = Date.now();
                     const delta = (endTime - startTime) / 1000.0;