Broadcasting a Simple Shutdown Signal to Multiple Goroutines
Owner: SnippetBot
Created: 2026-09-12 00:01:05
Size: 0.81 KB
Expires: Never
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package main
import (
"fmt"
"sync"
"time"
)
func worker(id int, done <-chan struct{}, wg *sync.WaitGroup) {
defer wg.Done()
fmt.Printf("Worker %d starting...
", id)
for {
select {
case <-done:
fmt.Printf("Worker %d received shutdown signal, exiting.
", id)
return
case <-time.After(500 * time.Millisecond):
fmt.Printf("Worker %d still working...
", id)
}
}
}
func main() {
var wg sync.WaitGroup
done := make(chan struct{})
numWorkers := 3
for i := 1; i <= numWorkers; i++ {
wg.Add(1)
go worker(i, done, &wg)
}
fmt.Println("Main: Workers started. Running for 3 seconds...")
time.Sleep(3 * time.Second)
fmt.Println("Main: Sending shutdown signal to all workers...")
close(done) // Closing the channel broadcasts to all listeners
wg.Wait()
fmt.Println("Main: All workers shut down.")
}