On Fri, Apr 23, 2021 at 1:36 AM Nail Islamov wrote:
> Answers above don't explain the difference in behavior:
> [1] https://play.golang.org/p/lXA2F4b880W
> [2] https://play.golang.org/p/doruBxrquhw
>
> Why did deadlock happen in [1], despite creating a variable?
>
If I change the order ([2]), I d
Sorry, ignore that. In [1], I make a copy of a locked mutex, which creates
a *new *locked mutex.
Basically the only non-obvious behavior here is that `&(*m) == m` by the
rules of Go, the rest was explained above.
On Friday, 23 April 2021 at 9:36:26 am UTC+10 Nail Islamov wrote:
> Answers above
Answers above don't explain the difference in behavior:
[1] https://play.golang.org/p/lXA2F4b880W
[2] https://play.golang.org/p/doruBxrquhw
Why did deadlock happen in [1], despite creating a variable?
If I change the order ([2]), I do avoid a deadlock (meaning that I have two
separate mutexes).
I think what is going on here is that it is wrong to say that `(*observer)`
creates a copy:
https://golang.org/ref/spec#Address_operators
> For an operand x of pointer type *T, the pointer indirection *x denotes
> the variable of type T pointed to by x.
That variable is addressable and contains
On Thu, Apr 22, 2021 at 1:39 PM Mikhail Mazurskiy
wrote:
> Thanks for the response, I didn't see this section. However, I'm still
> confused as it says the exception in 3. only applies to fields, not to
> methods. RLock() is obviously a method, not a field.
You're right. And because the playgr
On Thu, 22 Apr 2021 at 21:27, Jan Mercl <0xj...@gmail.com> wrote:
> On Thu, Apr 22, 2021 at 1:15 PM Mikhail Mazurskiy
> wrote:
>
> > I stumbled upon this strange looking piece of code [1]. I thought it
> dereferences the pointer, creating a copy of the mutex, and then calls
> RLock() on the copy
On Thu, Apr 22, 2021 at 1:15 PM Mikhail Mazurskiy
wrote:
> I stumbled upon this strange looking piece of code [1]. I thought it
> dereferences the pointer, creating a copy of the mutex, and then calls
> RLock() on the copy (i.e. a nop). But it does not work this way. I
> experimented with it [
