golang无缓冲通道

无缓冲通道

通道是goroutine之间的安全通讯机制。是阻塞/同步机制

package main

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

var wg sync.WaitGroup

func init() {
	rand.Seed(time.Now().UnixNano())
}

func main() {
	cc := make(chan byte)

	wg.Add(2)

	// 运动员就绪
	go playball("ping jie", cc)
	go playball("luo ge", cc)

	cc <- 1

	wg.Wait()
}

// 运动员
func playball(name string, cc chan byte) {
	defer wg.Done()

	for {
		// 接球
		ball, ok := <-cc
		if !ok {
			fmt.Printf("Player %s Won\n", name)
			return
		}

		// 结束条件判断
		n := rand.Intn(50)
		if n%9 == 0 {
			fmt.Printf("Player %s Missed\n", name)
			close(cc)
			return
		}

		// 发球
		fmt.Printf("Player %s Hit %d\n", name, ball)
		cc <- ball
	}
}