go sync的并发同步简单用法

//通过golang中的 goroutine 与sync.Mutex进行并发同步

package main

import (

    "fmt"

    "runtime"

    "sync"

)

var count int = 0

func counter(lock *sync.Mutex) {

    lock.Lock()

    count++

    fmt.Println(count)

    lock.Unlock()

}

func main() {

    lock := &sync.Mutex{} //传递指针是为了防止 函数内的锁和 调用锁不一致

    for i := 0; i < 100000; i++ {

        go counter(lock)

    }

    for {

        lock.Lock()

        c := count

        lock.Unlock()

        runtime.Gosched() //把时间片给别的goroutine  未来某个时刻运行该routine

        if c >= 100000 {

            fmt.Println("gorountine end")

            break

        }

    }

}