Class Latch

Example

const latch = new Latch(3);

async function task(id: number) {
    console.log(`Task ${id} is waiting at the latch.`);
    await latch.wait();
    console.log(`Task ${id} has crossed the latch.`);
}

// Start 3 tasks that will wait at the latch
task(1);
task(2);
task(3);

// Simulate some work before counting down
setTimeout(() => {
    console.log("Counting down the latch");
    latch.countDown();
    latch.countDown();
    latch.countDown();
}, 1000);
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