Look free ID genertion (was: Is there a more efficient threading lock?)

[2QdxY4RzWzUUiLuE at potatochowder.com]

On 2023-03-01 at 14:35:35 -0500,
avi.e.gross at gmail.com wrote:

> What would have happened if all processors had been required to have
> some low level instruction that effectively did something in an atomic
> way that allowed a way for anyone using any language running on that
> machine a way to do a simple thing like set a lock or check it?

Have happened?  I don't know about "required," but processors have
indeed had such instructions for decades; e.g., the MC68000 from the
early to mid 1980s (and used in the original Apple Macintosh, but I
digress) has/had a Test and Set instruction.