Data update

Task/Checkpoint-synchronization/JavaScript/checkpoint-synchronization.js

@@ -0,0 +1,47 @@
+class Latch {
+  constructor(limit) {
+    this.semafor = limit;
+    this.lock = new Promise(resolve => {
+      this.resolve = resolve;
+    });
+  }
+
+  wait() {
+    this.semafor--;
+    if (this.semafor === 0) {
+      this.resolve();
+    }
+    return this.lock;
+  }
+}
+
+class Worker {
+  static async doWork(howLong, barrier, name) {
+    await new Promise(resolve => setTimeout(resolve, howLong));
+    console.log(`Worker ${name} finished work`);
+    await barrier.wait();
+    console.log(`Worker ${name} finished assembly`);
+  }
+}
+
+async function main() {
+  const latch = new Latch(5);
+
+  // Random number generator function
+  const getRandomInt = (min, max) => {
+    return Math.floor(Math.random() * (max - min + 1)) + min;
+  };
+
+  const promises = [
+    Worker.doWork(getRandomInt(300, 3000), latch, "John"),
+    Worker.doWork(getRandomInt(300, 3000), latch, "Henry"),
+    Worker.doWork(getRandomInt(300, 3000), latch, "Smith"),
+    Worker.doWork(getRandomInt(300, 3000), latch, "Jane"),
+    Worker.doWork(getRandomInt(300, 3000), latch, "Mary")
+  ];
+
+  await Promise.all(promises);
+  console.log("Assembly is finished");
+}
+
+main();