Countdownlatch example

count_down_latch_example.go

package main

import (
	"fmt"
	"time"
)

func main() {
	const numGreeters = 10

	hello := func(wg *CountDownLatch, id int) {
		defer wg.Done()
		time.Sleep(10 * time.Second)
		fmt.Printf("Hello from %v!\n", id)
	}

	waitGroup := CountDownLatch{}
	waitGroup.Add(numGreeters)

	for i := 0; i < numGreeters; i++ {
		go hello(&waitGroup, i)
	}

	await := waitGroup.Await(5 * time.Second)
	fmt.Printf("Await status: %t \n", await)
}