Is core.internal.atomic.atomicFetchAdd implementation really lock free?

[H. S. Teoh]

On Wed, Nov 30, 2022 at 01:16:00PM +1300, rikki cattermole via Digitalmars-d wrote:
> On 30/11/2022 1:12 PM, H. S. Teoh wrote:
> > Hmm, that's weird that the docs would say that.  I've always been
> > under the impression that core.atomic ops use locks to achieve
> > atomicity.
> 
> No its correct.
> 
> As long as the hardware supports atomic operations, it'll use those
> instructions. It does have a fallback to use a mutex if need be
> though, which might be where you got that idea from.

Ah, I see. Thanks!


T

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