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Re: Understandability

From David Brown <david.brown@hesbynett.no>
Newsgroups comp.lang.c
Subject Re: Understandability
Date 2015-05-19 00:11 +0200
Organization A noiseless patient Spider
Message-ID <mjdo13$cpu$1@dont-email.me> (permalink)
References (18 earlier) <mj3mtf$at8$1@dont-email.me> <1e157a01-0835-41e9-849b-40dab655173e@googlegroups.com> <55562EE4.3080202@verizon.net> <89e6a413-a002-481f-a084-16b7c0d9213a@googlegroups.com> <mj8i5u$ejc$1@dont-email.me>

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On 17/05/15 01:01, James Kuyper wrote:
> On 05/16/2015 12:18 PM, David Kleinecke wrote:
>> On Friday, May 15, 2015 at 10:37:48 AM UTC-7, James Kuyper wrote:
> ...
>>> Could you describe the distinction between those formal and informal
>>> meanings? I would assume, in context, that both Keith and David were
>>> referring to what, on typical Unix-like systems, results from using the
>>> "mkfifo" command or the "|" symbol at the command line, or the pipe() or
>>> popen() functions in C code. Those are four different ways of invoking
>>> the same feature of the operating system. Does that differ from your
>>> expectations?
>>
>> These are all examples of what I called formal pipes. Informal pipes
>> involve situations where one piece of code gets data from another by
>> (usually) next_token or the like calls. I call these pull pipes. There
>> are also push pipes where one code piece sends data along by a
>> handle_token call.
>
> Could you identify the context in which next_token and handle_token
> apply (just like I did above, when I said "typical Unix-like system",
> "command line", and "functions in C code")? On my desktop machine, the
> 'man' command gives me nothing for either of those names. A google
> search gives me too many hits, none of them obviously the one you were
> talking about.
>
>> The practical effect of both kinds of pipes is the same.
>
> David Brown does recognize the token routines you are talking about, and
> says they can only be used for intra-process communication, whereas
> pipes can also be used for inter-process communication. If he's right,
> that's a huge difference, given that almost all uses of pipes that I'm
> familiar with are for inter-process communication. I've seen pipes used
> for intra-process communication, but it was merely a neat trick, not
> something that was actually reasonable to do.
>

I didn't "recognize" the token routines he mentioned - I merely guessed 
that their are normal functions which pass bits of data round within a 
single process (but conceivably between threads in the same process).  I 
could well be wrong, but that's what it sounded like to me.

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Understandability David Kleinecke <dkleinecke@gmail.com> - 2015-05-01 17:55 -0700
  Re: Understandability Keith Thompson <kst-u@mib.org> - 2015-05-01 19:41 -0700
  Re: Understandability wssimms@gmail.com - 2015-05-01 20:45 -0700
  Re: Understandability Bartc <bc@freeuk.com> - 2015-05-02 10:38 +0100
    Re: Understandability David Kleinecke <dkleinecke@gmail.com> - 2015-05-02 09:15 -0700
      Re: Understandability David Brown <david.brown@hesbynett.no> - 2015-05-04 09:26 +0200
        Re: Understandability David Kleinecke <dkleinecke@gmail.com> - 2015-05-04 12:52 -0700
  Re: Understandability Noob <root@127.0.0.1> - 2015-05-02 14:21 +0200
    Re: Understandability David Kleinecke <dkleinecke@gmail.com> - 2015-05-02 09:13 -0700
      Re: Understandability Ian Collins <ian-news@hotmail.com> - 2015-05-03 08:07 +1200
      Re: Understandability Keith Thompson <kst-u@mib.org> - 2015-05-02 13:11 -0700
        Re: Understandability David Kleinecke <dkleinecke@gmail.com> - 2015-05-03 10:50 -0700
          Re: Understandability Tim Rentsch <txr@alumni.caltech.edu> - 2015-05-03 13:26 -0700
            Re: Understandability David Kleinecke <dkleinecke@gmail.com> - 2015-05-04 12:29 -0700
              Re: Understandability Tim Rentsch <txr@alumni.caltech.edu> - 2015-05-05 05:47 -0700
        Re: Understandability raltbos@xs4all.nl (Richard Bos) - 2015-05-08 21:10 +0000
          Re: Understandability Ian Collins <ian-news@hotmail.com> - 2015-05-09 09:17 +1200
          Re: Understandability Keith Thompson <kst-u@mib.org> - 2015-05-08 14:32 -0700
            Re: Understandability David Kleinecke <dkleinecke@gmail.com> - 2015-05-09 09:13 -0700
              Re: Understandability Keith Thompson <kst-u@mib.org> - 2015-05-09 16:48 -0700
                Re: Understandability David Kleinecke <dkleinecke@gmail.com> - 2015-05-10 11:05 -0700
                Re: Understandability David Brown <david.brown@hesbynett.no> - 2015-05-11 08:48 +0200
                Re: Understandability David Kleinecke <dkleinecke@gmail.com> - 2015-05-11 09:55 -0700
                Re: Understandability James Kuyper <jameskuyper@verizon.net> - 2015-05-11 17:52 -0400
                Re: Understandability glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-05-11 22:54 +0000
                Re: Understandability David Brown <david.brown@hesbynett.no> - 2015-05-12 08:49 +0200
                Re: Understandability Morris Dovey <mrdovey@iedu.com> - 2015-05-12 02:15 -0500
                Re: Understandability Phil Carmody <pc+usenet@asdf.org> - 2015-05-25 03:15 +0300
                Re: Understandability James Kuyper <jameskuyper@verizon.net> - 2015-05-25 00:45 -0400
                Re: Understandability David Kleinecke <dkleinecke@gmail.com> - 2015-05-25 10:26 -0700
                Re: Understandability David Kleinecke <dkleinecke@gmail.com> - 2015-05-11 10:06 -0700
                Re: Understandability David Brown <david.brown@hesbynett.no> - 2015-05-12 08:59 +0200
                Re: Understandability David Kleinecke <dkleinecke@gmail.com> - 2015-05-12 08:37 -0700
                Re: Understandability David Brown <david.brown@hesbynett.no> - 2015-05-13 08:53 +0200
                Re: Understandability Keith Thompson <kst-u@mib.org> - 2015-05-13 08:16 -0700
                Re: Understandability David Kleinecke <dkleinecke@gmail.com> - 2015-05-13 09:49 -0700
                Re: Understandability Keith Thompson <kst-u@mib.org> - 2015-05-13 10:53 -0700
                Re: Understandability David Kleinecke <dkleinecke@gmail.com> - 2015-05-14 10:35 -0700
                Re: Understandability David Kleinecke <dkleinecke@gmail.com> - 2015-05-13 09:31 -0700
                Re: Understandability James Kuyper <jameskuyper@verizon.net> - 2015-05-13 13:10 -0400
                Re: Understandability David Kleinecke <dkleinecke@gmail.com> - 2015-05-14 10:27 -0700
                Re: Understandability James Kuyper <jameskuyper@verizon.net> - 2015-05-14 22:51 -0400
                Re: Understandability David Kleinecke <dkleinecke@gmail.com> - 2015-05-15 10:02 -0700
                Re: Understandability James Kuyper <jameskuyper@verizon.net> - 2015-05-15 13:37 -0400
                Re: Understandability David Kleinecke <dkleinecke@gmail.com> - 2015-05-16 09:18 -0700
                Re: Understandability David Brown <david.brown@hesbynett.no> - 2015-05-16 23:56 +0200
                Re: Understandability gazelle@shell.xmission.com (Kenny McCormack) - 2015-05-17 12:45 +0000
                Re: Understandability David Kleinecke <dkleinecke@gmail.com> - 2015-05-17 09:16 -0700
                Re: Understandability James Kuyper <jameskuyper@verizon.net> - 2015-05-17 12:47 -0400
                Re: Understandability David Kleinecke <dkleinecke@gmail.com> - 2015-05-18 10:54 -0700
                Re: Understandability James Kuyper <jameskuyper@verizon.net> - 2015-05-18 15:00 -0400
                Re: Understandability David Kleinecke <dkleinecke@gmail.com> - 2015-05-19 09:49 -0700
                Re: Understandability James Kuyper <jameskuyper@verizon.net> - 2015-05-19 13:10 -0400
                Re: Understandability James Kuyper <jameskuyper@verizon.net> - 2015-05-16 19:01 -0400
                Re: Understandability David Kleinecke <dkleinecke@gmail.com> - 2015-05-17 09:30 -0700
                Re: Understandability James Kuyper <jameskuyper@verizon.net> - 2015-05-17 12:58 -0400
                Re: Understandability David Kleinecke <dkleinecke@gmail.com> - 2015-05-18 10:54 -0700
                Re: Understandability James Kuyper <jameskuyper@verizon.net> - 2015-05-18 14:56 -0400
                Re: Understandability David Kleinecke <dkleinecke@gmail.com> - 2015-05-19 09:46 -0700
                Re: Understandability James Kuyper <jameskuyper@verizon.net> - 2015-05-19 13:16 -0400
                Re: Understandability Richard Heathfield <rjh@cpax.org.uk> - 2015-05-19 18:23 +0100
                Re: Understandability James Kuyper <jameskuyper@verizon.net> - 2015-05-19 14:02 -0400
                Re: Understandability David Brown <david.brown@hesbynett.no> - 2015-05-19 00:11 +0200
                Re: Understandability James Kuyper <jameskuyper@verizon.net> - 2015-05-18 18:28 -0400
                Re: Understandability Keith Thompson <kst-u@mib.org> - 2015-05-15 10:52 -0700
                Re: Understandability David Brown <david.brown@hesbynett.no> - 2015-05-13 21:53 +0200
          Re: Understandability David Brown <david.brown@hesbynett.no> - 2015-05-09 16:18 +0200
          Re: Understandability Noob <root@127.0.0.1> - 2015-05-09 18:31 +0200
            Re: Understandability raltbos@xs4all.nl (Richard Bos) - 2015-05-17 10:44 +0000
              Re: Understandability glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-05-17 15:53 +0000
      Re: Understandability David Brown <david.brown@hesbynett.no> - 2015-05-04 09:15 +0200
        Re: Understandability Waldek Hebisch <hebisch@math.uni.wroc.pl> - 2015-05-16 00:28 +0000
  Re: Understandability Tim Rentsch <txr@alumni.caltech.edu> - 2015-05-03 10:58 -0700

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