private_closure.go

package main

import (
        "fmt"
        "time"
)

var access func() int

func init() {
        i := 0
        t := time.After(100 * time.Millisecond)

        access = func() int {
                select {
                case <-t:
                        i++
                        t = time.After(100 * time.Millisecond)
                        return i
                default:
                        return i
                }
        }
}

func main() {
        for {
                fmt.Println(access())
        }
}