go run -race main.go
感觉不好用，不加锁会提示，加了锁还是会提示
var locks sync.Mutex
var iii int
func main() {
go func() {
for i := 0; i < 1000000; i++ {
locks.Lock()
iii++
locks.Unlock()
}
}()
for i := 0; i < 1000000; i++ {
locks.Lock()
iii++
locks.Unlock()
}
fmt.Println(iii)
}
