Producer-consumer in Golang

producer-consumer.go

package main

import (
    "fmt"
    "math/rand"
    "time"
)

const (
    N = 20
)

func delay() {
    time.Sleep(time.Millisecond * time.Duration(rand.Intn(100)))
}

/* Producer accept channel "items" only for sending values */
func producer(items chan<- int) {
    defer close(items)

    for i := 0; i < N; i++ {
        delay()
        items <- i
        fmt.Println(i, "th item produced")
    }
}

/* Consumer accept channel "items" only for receiving values */
func consumer(items <-chan int, done chan<- bool) {
    for data := range items {
        delay()
        fmt.Println("Consumed item #", data)
    }

    fmt.Println("Finished consumption")
    done <- true
}

func main() {
    items := make(chan int, 10)
    done := make(chan bool)

    go producer(items)
    go consumer(items, done)

    <-done
}