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Groups > comp.lang.c++ > #117567

Re: Run this under Windows and Linux

From "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com>
Newsgroups comp.lang.c++
Subject Re: Run this under Windows and Linux
Date 2023-11-04 11:48 -0700
Organization A noiseless patient Spider
Message-ID <ui63lf$3g2ju$3@dont-email.me> (permalink)
References (9 earlier) <uhuat3$1omhf$7@dont-email.me> <ui2pgj$2pd4h$1@dont-email.me> <ui3rar$2vc30$2@dont-email.me> <jXt1N.211577$0UVe.61104@fx17.iad> <ui63ga$3g2ju$2@dont-email.me>

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On 11/4/2023 11:45 AM, Chris M. Thomasson wrote:
> On 11/4/2023 9:03 AM, Scott Lurndal wrote:
>> "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> writes:
>>> On 11/3/2023 5:36 AM, Bonita Montero wrote:
>>>> Am 01.11.2023 um 21:02 schrieb Chris M. Thomasson:
>>>>
>>>>> If you can avoid using a CAS, aka CMPXCHG over on intel, then do it!
>>>>> Although, wrt intel, there is a way to use CMPXCHG without looping.
>>>>
>>>> I don't believe that, give me some code-example _here_. The expected
>>>> value of a compare exchange might always have been asynchronously
>>>> changed, so you need looping every time.
>>>>
>>>>> Think, strong CAS vs weak CAS...
>>>>
>>>> Strong CAS vs. weak CAS only makes a difference of architectures with
>>>> LL/SC. With these architectures a CAS may fail although the actual
>>>> data corresponds with the expected value because the cacheline might
>>>> have been evicted in the meantime. compare_exchange_strong checks for
>>>> this case and loops internally, whereas compare_exchange_weak gives a
>>>> false result after one try.
>>>
>>> Strong CAS cannot fail spuriously. Put on your thinking cap.
>>>
>>
>> BTW - Compare and Swap was invented by an engineer at IBM -
>> CAS is a backronym, the inventors initials are CAS.
>>
>> https://www.garlic.com/~lynn/2004l.html#56
>>
>>
>>    "charlie had come up with compare and swap at the science scenter
>>       http://www.garlic.com/~lynn/subtopic.html#545tech
>>     based on a lot of work he was doing in fine grain locking (late 60s)
>>     ... and tried to get it into 370 architecture. POK architecture 
>> owners
>>     came back and said it wasn't possible to justify a 
>> multiprocessor-specific
>>     instruction for the 370 architecture (already having test&set) ... 
>> and that
>>     to get it justified, it would be necessary to come up with a 
>> non-multiprocessor
>>     use for the instruction. thus was born the description for 
>> multi-threaded
>>     application use in non-locked regions .... when running on either
>>     multiprocessor or non-multiprocessor machines. this was originally
>>     included in the 370 prinicple of operations as programming notes
>>     associated with the compare&swap instruction(s). the description has
>>     since been expanded and moved to the principles of operation 
>> appendix.
>>
>>    note that the choice of compare and swap comes from needing a mnemonic
>>    that matched charlie's initials (CAS). the mnemonic was slightly 
>> changed
>>    for inclusion in 370 to CS (compare and swap) and CDS (compare 
>> double and swap).
>>
>>    the instructions have since been expanded for 64-bit operation and a
>>    new "perform locked operation" has since been added.
>>
>>
> 
> Yup. I have actually conversed with Lynn over on comp.arch. Very smart 
> person loaded up with knowledge.

The free pool manipulation in IBM's principle of operations, iirc, its 
in an appendix.

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Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-10-30 08:12 +0100
  Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-10-30 13:08 -0700
    Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-10-31 13:25 +0100
      Re: Run this under Windows and Linux Branimir Maksimovic <branimir.maksimovic@icloud.com> - 2023-10-31 17:37 +0000
      Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-10-31 13:59 -0700
        Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-01 13:00 +0100
          Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-01 19:24 +0100
            Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-01 19:28 +0100
              Re: Run this under Windows and Linux scott@slp53.sl.home (Scott Lurndal) - 2023-11-01 19:04 +0000
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-01 20:11 +0100
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-01 13:02 -0700
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-03 13:36 +0100
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-03 15:13 -0700
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-04 00:19 -0700
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-04 10:13 +0100
                Re: Run this under Windows and Linux scott@slp53.sl.home (Scott Lurndal) - 2023-11-04 15:53 +0000
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-04 16:58 +0100
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-04 11:44 -0700
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-09 01:05 -0800
                Re: Run this under Windows and Linux scott@slp53.sl.home (Scott Lurndal) - 2023-11-04 16:03 +0000
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-04 11:45 -0700
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-04 11:48 -0700
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-04 19:58 +0100
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-04 12:14 -0700
            Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-01 13:01 -0700
              Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-02 07:10 +0100
            Re: Run this under Windows and Linux Kaz Kylheku <864-117-4973@kylheku.com> - 2023-11-01 20:50 +0000
              Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-01 14:05 -0700
              Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-01 14:07 -0700
            Re: Run this under Windows and Linux Michael S <already5chosen@yahoo.com> - 2023-11-03 16:04 +0200
              Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-03 15:24 +0100
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-03 15:14 -0700
          Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-01 12:58 -0700
            Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-02 07:10 +0100
              Re: Run this under Windows and Linux scott@slp53.sl.home (Scott Lurndal) - 2023-11-02 14:58 +0000
                Re: Run this under Windows and Linux David Brown <david.brown@hesbynett.no> - 2023-11-02 16:34 +0100
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-02 16:46 +0100
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-02 13:12 -0700
                Re: Run this under Windows and Linux David Brown <david.brown@hesbynett.no> - 2023-11-03 10:13 +0100
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-03 15:16 -0700
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-08 20:33 -0800
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-02 16:44 +0100
                Re: Run this under Windows and Linux Kaz Kylheku <864-117-4973@kylheku.com> - 2023-11-02 16:02 +0000
                Re: Run this under Windows and Linux Michael S <already5chosen@yahoo.com> - 2023-11-03 16:10 +0200
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-04 21:05 -0700
                Re: Run this under Windows and Linux Kaz Kylheku <864-117-4973@kylheku.com> - 2023-11-05 04:23 +0000
              Re: Run this under Windows and Linux Kaz Kylheku <864-117-4973@kylheku.com> - 2023-11-02 15:37 +0000
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-02 16:48 +0100
                Re: Run this under Windows and Linux Kaz Kylheku <864-117-4973@kylheku.com> - 2023-11-02 16:00 +0000
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-02 17:26 +0100
                Re: Run this under Windows and Linux David Brown <david.brown@hesbynett.no> - 2023-11-03 10:15 +0100
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-03 11:55 +0100
                Re: Run this under Windows and Linux David Brown <david.brown@hesbynett.no> - 2023-11-03 14:41 +0100
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-03 15:22 +0100
                Re: Run this under Windows and Linux David Brown <david.brown@hesbynett.no> - 2023-11-03 16:35 +0100
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-03 16:49 +0100
                Re: Run this under Windows and Linux David Brown <david.brown@hesbynett.no> - 2023-11-03 18:02 +0100
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-03 18:08 +0100
                Re: Run this under Windows and Linux Kaz Kylheku <864-117-4973@kylheku.com> - 2023-11-03 17:29 +0000
                Re: Run this under Windows and Linux scott@slp53.sl.home (Scott Lurndal) - 2023-11-03 18:52 +0000
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-03 15:21 -0700
                Re: Run this under Windows and Linux David Brown <david.brown@hesbynett.no> - 2023-11-04 17:22 +0100
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-04 17:35 +0100
                Re: Run this under Windows and Linux David Brown <david.brown@hesbynett.no> - 2023-11-04 17:56 +0100
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-04 18:18 +0100
                Re: Run this under Windows and Linux scott@slp53.sl.home (Scott Lurndal) - 2023-11-03 18:51 +0000
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-03 15:20 -0700
                Re: Run this under Windows and Linux Kaz Kylheku <864-117-4973@kylheku.com> - 2023-11-03 17:28 +0000
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-03 18:30 +0100
                Re: Run this under Windows and Linux Kaz Kylheku <864-117-4973@kylheku.com> - 2023-11-03 18:03 +0000
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-03 19:07 +0100
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-03 19:08 +0100
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-03 15:26 -0700
                Re: Run this under Windows and Linux scott@slp53.sl.home (Scott Lurndal) - 2023-11-03 18:54 +0000
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-03 20:25 +0100
                Re: Run this under Windows and Linux Kaz Kylheku <864-117-4973@kylheku.com> - 2023-11-03 20:56 +0000
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-04 10:15 +0100
                Re: Run this under Windows and Linux scott@slp53.sl.home (Scott Lurndal) - 2023-11-04 16:05 +0000
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-04 17:35 +0100
                Re: Run this under Windows and Linux Kaz Kylheku <864-117-4973@kylheku.com> - 2023-11-04 18:44 +0000
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-03 15:19 -0700
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-04 10:16 +0100
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-04 10:25 +0100
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-04 12:42 -0700
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-05 05:33 +0100
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-05 05:35 +0100
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-05 12:11 -0800
                Re: Run this under Windows and Linux Kaz Kylheku <864-117-4973@kylheku.com> - 2023-11-05 22:54 +0000
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-05 18:49 -0800
                Re: Run this under Windows and Linux Kaz Kylheku <864-117-4973@kylheku.com> - 2023-11-06 02:58 +0000
                Re: Run this under Windows and Linux Kaz Kylheku <864-117-4973@kylheku.com> - 2023-11-03 15:32 +0000
                Re: Run this under Windows and Linux David Brown <david.brown@hesbynett.no> - 2023-11-03 18:05 +0100
                Re: Run this under Windows and Linux scott@slp53.sl.home (Scott Lurndal) - 2023-11-03 16:53 +0000
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-03 18:09 +0100
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-03 15:25 -0700
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-04 10:17 +0100
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-04 12:44 -0700
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-05 05:36 +0100
                Re: Run this under Windows and Linux Kaz Kylheku <864-117-4973@kylheku.com> - 2023-11-05 17:25 +0000
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-05 18:55 +0100
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-05 12:12 -0800
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-05 12:18 -0800
                Re: Run this under Windows and Linux Kaz Kylheku <864-117-4973@kylheku.com> - 2023-11-05 22:55 +0000
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-05 18:53 -0800
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-06 04:44 +0100
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-05 20:10 -0800
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-06 05:16 +0100
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-08 20:44 -0800
                Re: Run this under Windows and Linux Kaz Kylheku <864-117-4973@kylheku.com> - 2023-11-06 04:22 +0000
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-06 05:37 +0100
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-05 21:01 -0800
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-05 21:00 -0800
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-06 09:36 +0100
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-06 12:11 -0800
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-06 23:52 +0100
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-07 11:51 -0800
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-06 05:15 +0100
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-05 21:02 -0800
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-05 21:05 -0800
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-06 09:37 +0100
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-06 12:13 -0800
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-06 23:53 +0100
                Re: Run this under Windows and Linux Kaz Kylheku <864-117-4973@kylheku.com> - 2023-11-06 23:00 +0000
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-07 05:36 +0100
                Re: Run this under Windows and Linux Kaz Kylheku <864-117-4973@kylheku.com> - 2023-11-07 05:29 +0000
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-07 09:38 +0100
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-07 11:53 -0800
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-09 05:49 +0100
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-08 20:52 -0800
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-09 05:54 +0100
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-08 20:57 -0800
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-08 20:45 -0800
                Re: Run this under Windows and Linux Kaz Kylheku <864-117-4973@kylheku.com> - 2023-11-05 20:53 +0000
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-06 12:13 -0800
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-03 15:24 -0700
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-03 15:18 -0700
                Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-04 10:18 +0100
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-04 12:45 -0700
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-02 13:18 -0700
        Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-01 13:21 +0100
          Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-01 12:59 -0700
            Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-04 00:01 -0700
            Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-04 10:19 +0100
              Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-04 10:53 +0100
              Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-04 12:51 -0700
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-04 12:53 -0700
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-04 12:54 -0700
                Re: Run this under Windows and Linux "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-11-05 12:15 -0800
  Re: Run this under Windows and Linux Branimir Maksimovic <branimir.maksimovic@icloud.com> - 2023-11-03 21:18 +0000
    Re: Run this under Windows and Linux Bonita Montero <Bonita.Montero@gmail.com> - 2023-11-04 10:29 +0100
      Re: Run this under Windows and Linux Branimir Maksimovic <branimir.maksimovic@icloud.com> - 2023-11-05 15:30 +0000

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