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Devine Lu Linvega's posts Post Back to profile
Devine Lu Linvega

I'm trying to find practical implementations, and just general fun things people made, with concurrency in #forth. There's a lot of hand-waving and saying that yeah, like, it's easy no problem don't worry 'bout it, but very little linking to actual examples. Does anyone have written concurrent programs in forth? I'd love to see it. :)

3 May 2023 at 2:14 | Open on merveilles.town
18 comments
beesweater

@neauoire
You think there's any GPU stuff written in forth? I know that's pretty concurrent by default. Maybe some kind of shader project written in #forth.

3 May 2023 at 2:17 | Open on kolektiva.social
Devine Lu Linvega

@beesweater do you have a link to one that you might have tried?

3 May 2023 at 2:18 | Open on merveilles.town
cancel

@neauoire @beesweater gpu parallel execution is not much like CPU multithreaded execution. you can't write forth for a GPU, anyway.

3 May 2023 at 2:28 | Open on merveilles.town
cancel

@neauoire anyone saying concurrent programming for CPUs is easy has not ever done it

3 May 2023 at 2:26 | Open on merveilles.town
beesweater

@neauoire
I found the boot ROM for this multicore chip called the Parallax Propeller 2 github.com/speccy88/TAQOZ

3 May 2023 at 2:52 | Open on kolektiva.social
Devine Lu Linvega

@beesweater thank you! That's not exactly what I was looking for but it'll come in handy. 🙏

3 May 2023 at 2:53 | Open on merveilles.town
mx alex tax1a - 2020 (4)

@neauoire bradrodriguez.com/papers/mtask there's this classic paper about the principles of Forth multitasking; go up a level for this author's other forth articles, they are all pretty good.

3 May 2023 at 3:05 | Open on infosec.exchange
Devine Lu Linvega

@atax1a I'm reading it right now :) someone in the thread just sent it. It's exactly what I was looking for.

3 May 2023 at 3:06 | Open on merveilles.town
bx
Devine Lu Linvega

@bx those I'm more familiar with :) It's kind what got me interested into all this.

3 May 2023 at 4:04 | Open on merveilles.town
bx

@neauoire cool, it's been quite a while since i thought of arrayForth, it'd be fun to see if they have an emulator for gur chip to play around with

3 May 2023 at 4:44 | Open on tiny.tilde.website
Michael Alyn Miller

@neauoire Both MFORTH and Enforth implement a cooperative, dynamic (tasks are created at runtime) multitasker. MFORTH is in 8085 assembly, Enforth is in C. Might be helpful as a pair of sample implementations to go along with Brad's article...

github.com/malyn/MFORTH

github.com/malyn/Enforth

3 May 2023 at 5:04 | Open on hachyderm.io
Jack Rusher

@neauoire There were a number of single processor cooperatively multitasking FORTHs back in the day, including F83. You can probably find code for that system on the ‘net.

I’ve also built some real multi core stuff in FORTH, which is “easy” only in the sense that FORTH words are usually reentrant so long as each process/task has its own stack (modulo a few details).

3 May 2023 at 6:42 | Open on berlin.social
William

@neauoire lol I made a forth but it's explicitly not concurrent because safety. It has single threaded events that come from a work queue, including external/hardware/io events.

So much less fun, I know ;)

3 May 2023 at 9:58 | Open on mstdn.social
Xan Gregg

@neauoire Not online or practical, but maybe fun and slightly educational. I dug up code I made in 1986 using MacForth's cooperative multi-tasking to run 4 graphical sorts at once. Syntax core was:
: MY.TASK ( --)
...
ACTIVATE<
...
PAUSE
...
STOP> ;
Required a little extra cooperation to make sure the timing was fair for the visual comparison (not just based on number of PAUSE calls).

3 May 2023 at 14:54 | Open on vis.social
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