golang atomic demo

atomicdemo.go

package main

import (
	"fmt"
	"sync"
	"sync/atomic"
)

var browseNum uint32

func addNum() {
	atomic.AddUint32(&browseNum, 1)
}

func printNum() {
	v := atomic.LoadUint32(&browseNum)
	fmt.Println(v)
}

// test command: 
// go build -race -v
// .\atomdemo.exe
func main() {
	var wg sync.WaitGroup
	for i := 0; i < 10; i++ {
		wg.Add(1)
		go func() {
			addNum()
			printNum()
			wg.Done()
		}()
	}
	wg.Wait()
}