Re: [boost] [spinlock] Spin on volatile read, NUMA fairness?

Subject: Re: [boost] [spinlock] Spin on volatile read, NUMA fairness?
From: Peter Dimov (lists_at_[hidden])
Date: 2014-12-04 07:45:52

Gavin Lambert wrote:
> Out of curiosity, while I agree that the latter is better than the former, 
> how would this compare:
>
>       while( f_.exchange( true, std::memory_order_acquire ) )
>       {
>           while( f_.load( std::memory_order_relaxed ) )
>           {
>               /* maybe yield */
>           }
>       }

I think that you're right, this should indeed be better.