新手練習-消費者生產者模型

package main

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

func main()  {
    c := sync.NewCond(&sync.Mutex{})
    queueList := make(chan int, 10)

    //producer
    go func() {
        for {
            c.L.Lock()

            if len(queueList) == 5 {
                c.Wait()
            }

            num := rand.Intn(100)

            fmt.Println("Producer:", num)
            queueList <- num

            if len(queueList) == 5 {
                c.Signal()
            }
            c.L.Unlock()
        }
    }()

    //consumer
    go func() {
        for {
            c.L.Lock()

            if len(queueList) == 0 {
                c.Wait()
            }

            num := <- queueList

            fmt.Println("consumer:", num)

            if len(queueList) == 0 {
                c.Signal()
            }

            c.L.Unlock()
        }
    }()

    for {
        ;
    }
}