Re: [go-nuts] confusing a lock demo about https://golang.org/ref/mem#tmp_8

[郎凯]

Thanks a lot, I also want to know what the first lock meaning is?

在 2018年3月13日星期二 UTC+8下午9:32:35，Burak Serdar写道：
>
> The second lock waits until f() runs and unlocks the mutex. 
>
> On Tue, Mar 13, 2018 at 3:37 AM, 郎凯  
> wrote: 
> > var l sync.Mutex 
> > var a string 
> > 
> > func f() { 
> > a = "hello, world" 
> > l.Unlock() 
> > } 
> > 
> > func main() { 
> > l.Lock() 
> > go f() 
> > l.Lock() 
> > print(a) 
> > } 
> > 
> > I'm a new gopher, reading a blog about lock and having a problem, in 
> general 
> > , we use sync.Mutex in pairs, in the above code why could it call lock 
> two 
> > times  in main. 
> > Any help is Appreciated. 
> > Thanks in advanced. 
> > 
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Re: [go-nuts] confusing a lock demo about https://golang.org/ref/mem#tmp_8

[Burak Serdar]

The second lock waits until f() runs and unlocks the mutex.

On Tue, Mar 13, 2018 at 3:37 AM, 郎凯  wrote:
> var l sync.Mutex
> var a string
>
> func f() {
> a = "hello, world"
> l.Unlock()
> }
>
> func main() {
> l.Lock()
> go f()
> l.Lock()
> print(a)
> }
>
> I'm a new gopher, reading a blog about lock and having a problem, in general
> , we use sync.Mutex in pairs, in the above code why could it call lock two
> times  in main.
> Any help is Appreciated.
> Thanks in advanced.
>
> --
> You received this message because you are subscribed to the Google Groups
> "golang-nuts" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to golang-nuts+unsubscr...@googlegroups.com.
> For more options, visit https://groups.google.com/d/optout.

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