golang sync.Mutex(2)

package main



import (

    "fmt"

    "sync"

    "time"

)



type User struct {

    Name   string

    Locker *sync.Mutex

}



func (u *User) SetName(wati *sync.WaitGroup, name string) {

    defer func() {

        fmt.Println("Unlock set name:", name)

        u.Locker.Unlock()

        wati.Done()

    }()



    u.Locker.Lock()

    fmt.Println("Lock set name:", name)

    time.Sleep(1 * time.Second)

    u.Name = name

}



func (u *User) GetName(wati *sync.WaitGroup) {

    defer func() {

        fmt.Println("Unlock get name:", u.Name)

        u.Locker.Unlock()

        wati.Done()

    }()



    u.Locker.Lock()

    fmt.Println("Lock get name:", u.Name)

    time.Sleep(1 * time.Second)

}



func main() {

    user := User{}

    user.Locker = new(sync.Mutex)

    wait := &sync.WaitGroup{}

    names := []string{"a", "b", "c"}

    for _, name := range names {

        wait.Add(2)

        go user.SetName(wait, name)

        go user.GetName(wait)

    }



    wait.Wait()

}

转自：http://www.liguosong.com/2014/05/07/golang-sync-mutex/