Go timeout

timeout.go

package main

import "time"

func main() {
	timeout := time.Second
	t := time.NewTimer(timeout)
	for {
		select {
		case <-t.C: // <- A
			// timed out
		case <-doSomethingElse():
			if !t.Stop() { // <- B
				<-t.C // <- C
			}
		}
		t.Reset(timeout)
	}
}