Re: [boost] Do you know of standard implementation of async() that blocks on the future-destructor?

Subject: Re: [boost] Do you know of standard implementation of async() that blocks on the future-destructor?
From: Vicente J. Botet Escriba (vicente.botet_at_[hidden])
Date: 2015-10-12 17:42:00

Le 12/10/15 15:57, Agustín K-ballo Bergé a écrit :
> On 10/11/2015 9:02 PM, Vicente J. Botet Escriba wrote:
>> Hi,
>>
>> all is in the title.
>
> Don't they all? Blocking in the future destructor is what the standard 
> mandates.
>
I'm confused. Do they block on the future destructor or the destructor 
of the shared state?

The note of the standard says on the destructor of the returned future

 > "[ Note: If a future obtained from std::async is moved outside the 
local scope, other code that uses the future must be aware that the 
future’s destructor may block for the shared state to become ready. — 
end note ]"

C++ International Standard
Vicente