On Thu, 2 Mar 2023 12:45:50 +1100, Chris Angelico
declaimed the following:
>
>As have all CPUs since; it's the only way to implement locks (push the
>locking all the way down to the CPU level).
>
Xerox Sigma (circa 1970): Modify and Test (byte/halfword/word)
Granted, that was a
On 2023-03-02, Chris Angelico wrote:
> 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
On Thu, 2 Mar 2023 at 13:02, Weatherby,Gerard wrote:
>
> So I guess we know what would have happened.
>
Yep. It's not what I was talking about, but it's also a very important
concurrency management feature.
ChrisA
--
https://mail.python.org/mailman/listinfo/python-list
So I guess we know what would have happened.
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From: Python-list on
behalf of Chris Angelico
Sent: Wednesday, March 1, 2023 8:45:50 PM
To: python-list@python.org
Subject: Re: Look free ID genertion (was: Is there
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
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
On Thu, 2 Mar 2023 at 06:37, wrote:
>
> If a workaround like itertools.count.__next__() is used because it will not
> be interrupted as it is implemented in C, then I have to ask if it would
> make sense for Python to supply something similar in the standard library
> for the sole purpose of a
is very directly using the atomic operation directly.
-Original Message-
From: Python-list On
Behalf Of Dieter Maurer
Sent: Wednesday, March 1, 2023 1:43 PM
To: Chris Angelico
Cc: python-list@python.org
Subject: Look free ID genertion (was: Is there a more efficient threading
lock?)
Chris
Chris Angelico wrote at 2023-3-1 12:58 +1100:
> ...
> The
>atomicity would be more useful in that context as it would give
>lock-free ID generation, which doesn't work in Python.
I have seen `itertools.count` for that.
This works because its `__next__` is implemented in "C" and
therefore will not
