54 lines
1.9 KiB
TypeScript
54 lines
1.9 KiB
TypeScript
// Web Worker loader
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import { Actor, Turn, Assertion, Handle, Ref, __setNextActorId } from './actor.js';
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import { IdentityMap, Record } from 'preserves';
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import { parentPort, threadId } from 'worker_threads';
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import { Relay, spawnRelay } from './relay.js';
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const _Instance = Symbol.for('Instance');
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const Instance = Record.makeConstructor<{moduleName: string, arg: Assertion}>()(
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_Instance, ['moduleName', 'arg']);
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const STARTING_ACTOR_ID = (threadId & (2 ** 20 - 1)) * 1000000000;
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__setNextActorId(STARTING_ACTOR_ID);
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Turn.for(new Actor(), t => {
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const p = parentPort!;
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spawnRelay(t, {
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nextLocalOid: STARTING_ACTOR_ID + 500000000,
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packetWriter: bs => p.postMessage(bs),
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setup(t: Turn, r: Relay) {
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p.on('message', bs => r.accept(bs));
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p.on('close', () => Turn.for(t.actor, t => t.quit()));
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},
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initialRef: t.ref({
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handleMap: new IdentityMap<Handle, false | Ref>(),
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async assert(t, inst, handle) {
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if (!Instance.isClassOf(inst)) return;
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const m = await import(Instance._.moduleName(inst));
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t.freshen(t => t.spawn(t => {
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const q = (t: Turn) => {
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this.handleMap.delete(handle);
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t.quit();
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};
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if (this.handleMap.has(handle)) {
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q(t);
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} else {
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this.handleMap.set(handle, t.ref({ message: q }));
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m.default(t, Instance._.arg(inst));
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}
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}));
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},
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retract(t, handle) {
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const r = this.handleMap.get(handle);
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if (r === void 0) {
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this.handleMap.set(handle, false);
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} else {
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t.message(r as Ref, true);
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}
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}
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}),
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// debug: true,
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});
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});
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