main.go
· 439 B · Go
Исходник
func doWork(ctx context.Context) {
for {
select {
case <-ctx.Done():
return
default:
}
time.Sleep(1 * time.Second)
fmt.Println("doing work...")
}
}
func main() {
bgCtx := context.Background()
innerCtx, cancel := context.WithCancel(bgCtx)
go doWork(innerCtx) // call goroutine
time.Sleep(3 * time.Second) // do work in main
// well, if `doWork` is still not done, just cancel it
cancel()
}
| 1 | func doWork(ctx context.Context) { |
| 2 | for { |
| 3 | select { |
| 4 | case <-ctx.Done(): |
| 5 | return |
| 6 | default: |
| 7 | } |
| 8 | |
| 9 | time.Sleep(1 * time.Second) |
| 10 | fmt.Println("doing work...") |
| 11 | } |
| 12 | } |
| 13 | |
| 14 | func main() { |
| 15 | bgCtx := context.Background() |
| 16 | innerCtx, cancel := context.WithCancel(bgCtx) |
| 17 | |
| 18 | go doWork(innerCtx) // call goroutine |
| 19 | time.Sleep(3 * time.Second) // do work in main |
| 20 | |
| 21 | // well, if `doWork` is still not done, just cancel it |
| 22 | cancel() |
| 23 | } |
| 24 |