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

}

}

}