package main

import (

    "fmt"

    "sync"

    "time"

)

var limitMaxNum = 10

var chData = make(chan int, limitMaxNum)

var jobGroup sync.WaitGroup

var tasknum = 100

func main() {

    var i int

    var j int

    //组装任务

    chanTask := make(chan int, tasknum)

    for j = 0; j < tasknum; j++ {

        chanTask <- j

    }

    close(chanTask)

    jobGroup.Add(tasknum)

    for i = 0; i < limitMaxNum; i++ { //最多10个协程

        go dotask3(chanTask)

    }

    jobGroup.Wait()

    fmt.Println("main over")

}

func dotask3(taskChan chan int) {

    for taskid := range taskChan { //每个协程拼命抢夺任务，直到任务完结

        time.Sleep(time.Millisecond * 500)

        fmt.Println("finish task ", taskid)

        jobGroup.Done()

    }

}