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()
    }
}

后续更新…

文章永久链接：https://tech.souyunku.com/19000