Re: 7 lessons for embedded developers from ESC Boston 2015

From	Paul Rubin <no.email@nospam.invalid>
Newsgroups	comp.lang.forth
Subject	Re: 7 lessons for embedded developers from ESC Boston 2015
Date	2015-06-07 20:03 -0700
Organization	A noiseless patient Spider
Message-ID	<87sia2vr3s.fsf@jester.gateway.sonic.net> (permalink)
References	(2 earlier) <2cb81e7d-02ed-4627-8880-a7c283c78bce@googlegroups.com> <c0207aaf-5386-414a-a719-2b89d520c1b6@googlegroups.com> <1858389e-a5fa-46b0-a7cb-abcc8437d8c0@googlegroups.com> <bd381d9f-35fb-4230-9728-f162a88a7f79@googlegroups.com> <0fe5945c-a775-4ae2-8ae9-942d6349b0bd@googlegroups.com>

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Mark Wills <markwills1970@gmail.com> writes:
> port@ >float fbuffer f! pause
> A somewhat tortured example but you get the point. In a pre-emptive
> system I cannot guarantee that another task is not trying to read from
> fbuffer while I'm trying to write to it. I have to put a lock around it.

Preferable is to not allow any other tasks to directly access fbuffer
for either reading or writing, but make it owned by the task that reads
the port.  Other tasks needing the data can only get it through message
passing from the port reading task.  It's pretty easy to program in this
style and it gets rid of most of those hazards.  It incurs some overhead
compared to shared memory, but for most i/o concurrency uses it's not a
problem.

Andrew Haley also has implemented transactional memory in Forth, which
is another approach.

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7 lessons for embedded developers from ESC Boston 2015 visualforth@rocketmail.com - 2015-05-19 15:44 -0700
  Re: 7 lessons for embedded developers from ESC Boston 2015 "Elizabeth D. Rather" <erather@forth.com> - 2015-05-19 14:55 -1000
    Re: 7 lessons for embedded developers from ESC Boston 2015 visualforth@rocketmail.com - 2015-05-20 10:04 -0700
  Re: 7 lessons for embedded developers from ESC Boston 2015 Mark Wills <markwills1970@gmail.com> - 2015-05-20 00:29 -0700
    Re: 7 lessons for embedded developers from ESC Boston 2015 djc <ciesinger@gmx.net> - 2015-05-20 03:47 -0700
    Re: 7 lessons for embedded developers from ESC Boston 2015 hughaguilar96@gmail.com - 2015-06-04 21:02 -0700
      Re: 7 lessons for embedded developers from ESC Boston 2015 Raimond Dragomir <raimond.dragomir@gmail.com> - 2015-06-04 23:31 -0700
        Re: 7 lessons for embedded developers from ESC Boston 2015 rickman <gnuarm@gmail.com> - 2015-06-05 03:15 -0400
          Re: 7 lessons for embedded developers from ESC Boston 2015 stephen@mpeforth.com (Stephen Pelc) - 2015-06-05 10:48 +0000
            Re: 7 lessons for embedded developers from ESC Boston 2015 Raimond Dragomir <raimond.dragomir@gmail.com> - 2015-06-05 07:55 -0700
              Re: 7 lessons for embedded developers from ESC Boston 2015 stephen@mpeforth.com (Stephen Pelc) - 2015-06-05 15:54 +0000
                Re: 7 lessons for embedded developers from ESC Boston 2015 Raimond Dragomir <raimond.dragomir@gmail.com> - 2015-06-05 09:32 -0700
                Re: 7 lessons for embedded developers from ESC Boston 2015 "Elizabeth D. Rather" <erather@forth.com> - 2015-06-05 07:46 -1000
                Re: 7 lessons for embedded developers from ESC Boston 2015 hughaguilar96@gmail.com - 2015-06-06 16:28 -0700
                Re: 7 lessons for embedded developers from ESC Boston 2015 Raimond Dragomir <raimond.dragomir@gmail.com> - 2015-06-06 21:00 -0700
                Re: 7 lessons for embedded developers from ESC Boston 2015 visualforth@rocketmail.com - 2015-06-09 10:04 -0700
                Re: 7 lessons for embedded developers from ESC Boston 2015 Raimond Dragomir <raimond.dragomir@gmail.com> - 2015-06-09 10:58 -0700
                Re: 7 lessons for embedded developers from ESC Boston 2015 Paul Rubin <no.email@nospam.invalid> - 2015-06-07 20:40 -0700
              Re: 7 lessons for embedded developers from ESC Boston 2015 "Elizabeth D. Rather" <erather@forth.com> - 2015-06-05 07:40 -1000
          Re: 7 lessons for embedded developers from ESC Boston 2015 "Elizabeth D. Rather" <erather@forth.com> - 2015-06-05 07:31 -1000
        Re: 7 lessons for embedded developers from ESC Boston 2015 Mark Wills <markwills1970@gmail.com> - 2015-06-05 05:35 -0700
          Re: 7 lessons for embedded developers from ESC Boston 2015 foxaudioresearch@gmail.com - 2015-06-05 06:05 -0700
            Re: 7 lessons for embedded developers from ESC Boston 2015 Raimond Dragomir <raimond.dragomir@gmail.com> - 2015-06-05 07:43 -0700
              Re: 7 lessons for embedded developers from ESC Boston 2015 rickman <gnuarm@gmail.com> - 2015-06-05 14:47 -0400
              Re: 7 lessons for embedded developers from ESC Boston 2015 albert@spenarnc.xs4all.nl (Albert van der Horst) - 2015-06-06 09:28 +0000
            Re: 7 lessons for embedded developers from ESC Boston 2015 Mark Wills <markwills1970@gmail.com> - 2015-06-05 10:43 -0700
              Re: 7 lessons for embedded developers from ESC Boston 2015 Paul Rubin <no.email@nospam.invalid> - 2015-06-07 20:03 -0700

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