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ANN: Dogelog Player 2.3.1 (Task Channels)

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  ANN: Dogelog Player 2.3.1 (Task Channels) Mild Shock <janburse@fastmail.fm> - 2026-09-17 23:53 +0200
    Re: ANN: Dogelog Player 2.3.1 (Task Channels) Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> - 2026-09-25 23:36 +0800

#198015 — ANN: Dogelog Player 2.3.1 (Task Channels)

Dear All,

We are happy to announce a new
  edition of the Dogelog Player:

- Enhanced catch/3:
We noticed that catch/3 causes a friction in
'$YIELD'/1. So we redesigned its implementation
by refraining from using the host programming
language stack. The engine now offers an exception
handler stack, and the Prolog interpreter trampolin
unwinds these exception handlers upon a
Prolog or host error.

- New call_cleanup/3:
The new predicate call_cleanup/3 supplants the
old predicate once_cleanup/3. Like catch/3 it
now features an implementation that refrains
from using the host programming language stack.
Its implementation makes use of a rogue '$CUT'/1
which is realized by choicepoint scanning
and continuation manipulation.

- Task Channels:
To lower the footprint of the core there are
new libraries library(timer) and library(tasks).
The later library offers a new predicate task_join/1
which is abortable. Further the library offers
predicates chan/1, recv/2 and send/2 to deal with
channels that live in the cooperative
multitasking realm.

Have Fun!

Jan Burse, September 17, 2026, https://www.herbrand.ai/

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#198069

On 9/18/2026 5:53 AM, Mild Shock wrote:
> Dear All,
> 
> We are happy to announce a new
>   edition of the Dogelog Player:
> 
> - Enhanced catch/3:
> We noticed that catch/3 causes a friction in
> '$YIELD'/1. So we redesigned its implementation
> by refraining from using the host programming
> language stack. The engine now offers an exception
> handler stack, and the Prolog interpreter trampolin
> unwinds these exception handlers upon a
> Prolog or host error.
> 
> - New call_cleanup/3:
> The new predicate call_cleanup/3 supplants the
> old predicate once_cleanup/3. Like catch/3 it
> now features an implementation that refrains
> from using the host programming language stack.
> Its implementation makes use of a rogue '$CUT'/1
> which is realized by choicepoint scanning
> and continuation manipulation.
> 
> - Task Channels:
> To lower the footprint of the core there are
> new libraries library(timer) and library(tasks).
> The later library offers a new predicate task_join/1
> which is abortable. Further the library offers
> predicates chan/1, recv/2 and send/2 to deal with
> channels that live in the cooperative
> multitasking realm.
> 
> Have Fun!
> 
> Jan Burse, September 17, 2026, https://www.herbrand.ai/

Dear Mild Shock,

Congratulations on this milestone.  I see that you've been way too
busy coding to reply to my other followups, and I hope you will for-
give me for not replying to more of your Usenet posts.

They are always delightful, and I look forward to read more of your
poetry.


Best wishes, and happy Prolog in Python!
-- 
Johann | email: invalid -> com | http://www.myrkraverk.com/blog/
I'm not from the Internet, I just work there. | via Easynews.com
https://bsky.app/profile/myrkraverk.bsky.social | for ( ;; ) _:;
Federated at https://fed.brid.gy/bsky/myrkraverk.bsky.social

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