From Newsgroup: comp.lang.prolog

Dear All,

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

- User Time:
Our -C-WAM channels are still pounding 1++ ping
pong roundtrip between JavaScript workers,
thanks to SharedArrayBuffer and Atomic.wait().
But while workers are busy with each other
Dogelog Player main worker will wait. Therefore
we introduced a new statistics "user" and time/1
shows user percentage for non-wait main.

- Hack Instructions:
What a -C-WAM worker will drive, is the Hack VM
an alternative to the Dogelog VM. Our first
version of Hack VM instruction set had 10-bit
jump operand and 10-bit arithmetic operand.
This made it difficult to run larger CLP(Z)
examples. So we redesigned the instuction
set to have one 24-bit operand.

- Hack Compilation:
There is a new library(hack), which houses
the emulator and a new disassembler by the
predicate instructions/1, the later taking a
goal argument. The Hack VM compiler can now
emit jump and link instructions for disjunction.
It can also digest '$MARK'/1 and '$CUT'/1 from
the Dogelog Player surface translation, and
therefor it is now able to compile if-then-else.

Have Fun!


Jan Burse, August 30, 2026, https://www.herbrand.ai/
--- Synchronet 3.22a-Linux NewsLink 1.2

From Newsgroup: comp.lang.prolog

Hi,

In 1984 David Harel wrote a charming paper
about statecharts to visualize complex system
state and behaviour. After a $80 million
acquisition and the expiry of patents. The
2015 W3C XML standard for statecharts has
an appendix D showing a reference implementation.

Unlike the W3C appendix D take, the simulator
is a homomorphism of next/3, with an intercept
for cancellations. By using maplist/3 and
not concurrent_maplist/3 we added a barrier.
We can now let the little dog play fetch in
some nature park, just like in the
Stately AI demo page.

Bye

See also:

Dogelog in the Park: A Barriered Statechart Simulator https://medium.com/2989/a50682d1fde8

Mild Shock schrieb:

Dear All,

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

- User Time:
Our -C-WAM channels are still pounding 1++ ping
pong roundtrip between JavaScript workers,
thanks to SharedArrayBuffer and Atomic.wait().
But while workers are busy with each other
Dogelog Player main worker will wait. Therefore
we introduced a new statistics "user" and time/1
shows user percentage for non-wait main.

- Hack Instructions:
What a -C-WAM worker will drive, is the Hack VM
an alternative to the Dogelog VM. Our first
version of Hack VM instruction set had 10-bit
jump operand and 10-bit arithmetic operand.
This made it difficult to run larger CLP(Z)
examples. So we redesigned the instuction
set to have one 24-bit operand.

- Hack Compilation:
There is a new library(hack), which houses
the emulator and a new disassembler by the
predicate instructions/1, the later taking a
goal argument. The Hack VM compiler can now
emit jump and link instructions for disjunction.
It can also digest '$MARK'/1 and '$CUT'/1 from
the Dogelog Player surface translation, and
therefor it is now able to compile if-then-else.

Have Fun!

Jan Burse, August 30, 2026, https://www.herbrand.ai/

--- Synchronet 3.22a-Linux NewsLink 1.2

From Newsgroup: comp.lang.prolog

Hi,

Dogelog Player is a Prolog system for the
JavaScript, Python and Java target, mostly
written in 100% Prolog itself. Since it runs in
cooperative multitasking enviroments, it features a
rCy$YIELDrCO/1. We noticed that catch/3 causes some
friction and we found a simple remedy.

The friction was caused by a switch from Prolog,
to Host Language and to Prolog so that rCy$YIELDrCO/1
had to create choice points. We eleminated both.
The new catch/3 realization can easily scale to
millions of nestings, since it has become
independent of the native stack.

Bye

See also:

5 Minutes Implementation of Prolog catch/3 and throw/1 https://medium.com/2989/dc662b85fcb2

Mild Shock schrieb:

Hi,

In 1984 David Harel wrote a charming paper
about statecharts to visualize complex system
state and behaviour. After a $80 million
acquisition and the expiry of patents. The
2015 W3C XML standard for statecharts has
an appendix D showing a reference implementation.

Unlike the W3C appendix D take, the simulator
is a homomorphism of next/3, with an intercept
for cancellations. By using maplist/3 and
not concurrent_maplist/3 we added a barrier.
We can now let the little dog play fetch in
some nature park, just like in the
Stately AI demo page.

Bye

See also:

Dogelog in the Park: A Barriered Statechart Simulator https://medium.com/2989/a50682d1fde8

Mild Shock schrieb:

Dear All,

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

- User Time:
Our -C-WAM channels are still pounding 1++ ping
pong roundtrip between JavaScript workers,
thanks to SharedArrayBuffer and Atomic.wait().
But while workers are busy with each other
Dogelog Player main worker will wait. Therefore
we introduced a new statistics "user" and time/1
shows user percentage for non-wait main.

- Hack Instructions:
What a -C-WAM worker will drive, is the Hack VM
an alternative to the Dogelog VM. Our first
version of Hack VM instruction set had 10-bit
jump operand and 10-bit arithmetic operand.
This made it difficult to run larger CLP(Z)
examples. So we redesigned the instuction
set to have one 24-bit operand.

- Hack Compilation:
There is a new library(hack), which houses
the emulator and a new disassembler by the
predicate instructions/1, the later taking a
goal argument. The Hack VM compiler can now
emit jump and link instructions for disjunction.
It can also digest '$MARK'/1 and '$CUT'/1 from
the Dogelog Player surface translation, and
therefor it is now able to compile if-then-else.

Have Fun!


Jan Burse, August 30, 2026, https://www.herbrand.ai/

--- Synchronet 3.22a-Linux NewsLink 1.2