Go中关于automic和mutex锁定的区别

先上代码：

package main

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

var (
	count int32
	wg    sync.WaitGroup
)

func main() {
	wg.Add(2)
	go incCount()
	go incCount()
	wg.Wait()
	fmt.Println(count)
}

func incCount() {
	defer wg.Done()
	for i := 0; i < 2; i++ {
		value := atomic.LoadInt32(&count)
		runtime.Gosched()
		value++
		atomic.StoreInt32(&count,value)
	}
}

package main

import (
	"fmt"
	"runtime"
	"sync"
)

var (
	count int32
	wg    sync.WaitGroup
	mutex sync.Mutex
)

func main() {
	wg.Add(2)
	go incCount()
	go incCount()
	wg.Wait()
	fmt.Println(count)
}

func incCount() {
	defer wg.Done()
	for i := 0; i < 2; i++ {
		mutex.Lock()
		value := count
		runtime.Gosched()
		value++
		count = value
		mutex.Unlock()
	}
}

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