I’m exploring how to use WaitGroup to wait for all goroutines to finish. Here is my code
package main
import (
"fmt"
"sync"
"time"
)
func main() {
var wg sync.WaitGroup
wg.Add(3)
go one(wg)
go two(wg)
go three(wg)
wg.Wait()
}
func one(wg sync.WaitGroup) {
defer wg.Done()
time.Sleep(5 * time.Second)
fmt.Println("One")
}
func two(wg sync.WaitGroup) {
defer wg.Done()
time.Sleep(7 * time.Second)
fmt.Println("Two")
}
func three(wg sync.WaitGroup) {
defer wg.Done()
time.Sleep(3 * time.Second)
fmt.Println("Three")
}
I keep getting this error “all goroutines are asleep - deadlock” after all the goroutines have printed. I’m unable to understand what’s wrong here - there are no channels involved - it’s just a simple flow. What am I missing?