64 lines
2.2 KiB
TypeScript
64 lines
2.2 KiB
TypeScript
// Web Worker loader
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import { Actor, Turn, Ref, __setNextActorId } from '../runtime/actor.js';
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import { parentPort, threadId } from 'worker_threads';
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import { Relay, spawnRelay } from '../transport/relay.js';
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import { toInstance } from '../gen/worker.js';
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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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type TaskState =
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| { readonly state: "start_pending" }
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| { readonly state: "starting" }
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| { readonly state: "shutdown_pending" }
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| { readonly state: "running", shutdownRef: Ref };
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new Actor(t => {
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const p = parentPort!;
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let taskState: TaskState = { state: "start_pending" };
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t.activeFacet.preventInertCheck();
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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.activeFacet, t => t.stopActor()));
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},
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initialRef: t.ref({
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async assert(t, inst0) {
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const inst = toInstance(inst0);
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if (inst === void 0) return;
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if (taskState.state !== "start_pending") return;
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taskState = { state: "starting" };
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const m = await import(inst.name);
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t.freshen(t => t.spawn(t => {
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t.activeFacet.actor.atExit(() => {
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console.log('Worker terminating');
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process.exit(0);
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});
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if (taskState.state === "shutdown_pending") {
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t.stopActor();
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} else {
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taskState = {
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state: "running",
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shutdownRef: t.ref({ message(t) { t.stopActor(); } }),
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};
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m.default(t, inst.argument);
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}
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}));
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},
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retract(t) {
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if (taskState.state === "running") {
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t.message(taskState.shutdownRef, true);
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} else {
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taskState = { state: "shutdown_pending" };
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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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