On Thu, 2 Mar 2023 at 08:01, <2qdxy4rzwzuui...@potatochowder.com> wrote: > > On 2023-03-01 at 14:35:35 -0500, > avi.e.gr...@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.
As have all CPUs since; it's the only way to implement locks (push the locking all the way down to the CPU level). ChrisA -- https://mail.python.org/mailman/listinfo/python-list
