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41 lines
1 KiB
JavaScript
41 lines
1 KiB
JavaScript
import workerThreads from "node:worker_threads";
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const { port1: mainPort, port2: workerPort } = new workerThreads
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.MessageChannel();
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// Note: not using Promise.withResolver() because it's not available in Node.js
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const deferred = createDeferred();
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const worker = new workerThreads.Worker(
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import.meta.resolve("./message_port_1.cjs"),
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{
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workerData: workerPort,
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transferList: [workerPort],
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},
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);
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worker.on("message", (data) => {
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console.log("worker:", data);
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mainPort.on("message", (msg) => {
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console.log("mainPort:", msg);
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deferred.resolve();
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});
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mainPort.on("close", (_msg) => {
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console.log("mainPort closed");
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});
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});
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worker.postMessage("Hello from parent");
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await deferred.promise;
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await worker.terminate();
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mainPort.close();
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function createDeferred() {
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let resolveCallback;
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let rejectCallback;
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const promise = new Promise((resolve, reject) => {
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resolveCallback = resolve;
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rejectCallback = reject;
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});
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return { promise, resolve: resolveCallback, reject: rejectCallback };
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}
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