================================================================
Logtalk - Open source object-oriented logic programming language
Release 2.30.7

Copyright (c) 1998-2007 Paulo Moura.  All Rights Reserved.
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% start by loading the example and the required library files:

| ?- logtalk_load(philosophers(loader)).
...


% five meals for each philosopher, each one spending a maximum of five seconds of continuous thinking or eating:

| ?- threaded_ignore(p1::run(5, 5)), threaded_ignore(p2::run(5, 5)), threaded_ignore(p3::run(5, 5)), threaded_ignore(p4::run(5, 5)), threaded_ignore(p5::run(5, 5)).

Yes
Philosopher p3 thinking for 1 seconds.
Philosopher p1 thinking for 2 seconds.
Philosopher p2 thinking for 3 seconds.
Philosopher p4 thinking for 4 seconds.
Philosopher p5 thinking for 3 seconds.
Philosopher p3 eating for 2 seconds with chopsticks cs3 and cs2.
Philosopher p1 eating for 3 seconds with chopsticks cs5 and cs1.
Philosopher p2 thinking for 3 seconds.
Philosopher p3 thinking for 2 seconds.
Philosopher p5 thinking for 1 seconds.
Philosopher p4 eating for 1 seconds with chopsticks cs4 and cs3.
Philosopher p5 thinking for 1 seconds.
Philosopher p1 thinking for 3 seconds.
Philosopher p4 thinking for 1 seconds.
Philosopher p3 eating for 2 seconds with chopsticks cs3 and cs2.
Philosopher p5 eating for 2 seconds with chopsticks cs5 and cs4.
Philosopher p2 thinking for 3 seconds.
Philosopher p4 thinking for 2 seconds.
Philosopher p3 thinking for 2 seconds.
Philosopher p5 thinking for 1 seconds.
Philosopher p1 eating for 3 seconds with chopsticks cs5 and cs1.
Philosopher p4 eating for 4 seconds with chopsticks cs4 and cs3.
Philosopher p5 thinking for 1 seconds.
Philosopher p2 thinking for 1 seconds.
Philosopher p3 thinking for 4 seconds.
Philosopher p5 thinking for 2 seconds.
Philosopher p2 thinking for 4 seconds.
Philosopher p1 thinking for 1 seconds.
Philosopher p5 thinking for 1 seconds.
Philosopher p4 thinking for 4 seconds.
Philosopher p1 eating for 1 seconds with chopsticks cs5 and cs1.
Philosopher p5 thinking for 3 seconds.
Philosopher p3 eating for 2 seconds with chopsticks cs3 and cs2.
Philosopher p1 thinking for 3 seconds.
Philosopher p2 thinking for 4 seconds.
Philosopher p3 thinking for 3 seconds.
Philosopher p5 eating for 4 seconds with chopsticks cs5 and cs4.
Philosopher p4 thinking for 3 seconds.
Philosopher p1 thinking for 4 seconds.
Philosopher p2 eating for 1 seconds with chopsticks cs1 and cs2.
Philosopher p3 thinking for 3 seconds.
Philosopher p4 thinking for 3 seconds.
Philosopher p2 thinking for 1 seconds.
Philosopher p5 thinking for 2 seconds.
Philosopher p2 eating for 3 seconds with chopsticks cs1 and cs2.
Philosopher p1 thinking for 4 seconds.
Philosopher p3 thinking for 3 seconds.
Philosopher p5 eating for 2 seconds with chopsticks cs5 and cs4.
Philosopher p4 thinking for 1 seconds.
Philosopher p4 thinking for 4 seconds.
Philosopher p2 thinking for 1 seconds.
Philosopher p5 thinking for 4 seconds.
Philosopher p1 eating for 4 seconds with chopsticks cs5 and cs1.
Philosopher p2 thinking for 2 seconds.
Philosopher p3 eating for 2 seconds with chopsticks cs3 and cs2.
Philosopher p2 thinking for 3 seconds.
Philosopher p3 thinking for 1 seconds.
Philosopher p4 eating for 1 seconds with chopsticks cs4 and cs3.
Philosopher p5 thinking for 1 seconds.
Philosopher p3 thinking for 4 seconds.
Philosopher p4 thinking for 4 seconds.
Philosopher p1 thinking for 2 seconds.
Philosopher p5 eating for 2 seconds with chopsticks cs5 and cs4.
Philosopher p2 eating for 2 seconds with chopsticks cs1 and cs2.
Philosopher p1 thinking for 3 seconds.
Philosopher p5 thinking for 4 seconds.
Philosopher p2 thinking for 2 seconds.
Philosopher p3 eating for 4 seconds with chopsticks cs3 and cs2.
Philosopher p4 thinking for 2 seconds.
Philosopher p1 eating for 3 seconds with chopsticks cs5 and cs1.
Philosopher p2 thinking for 1 seconds.
Philosopher p4 thinking for 3 seconds.
Philosopher p2 thinking for 1 seconds.
Philosopher p5 thinking for 3 seconds.
p3 terminated.
Philosopher p2 thinking for 3 seconds.
p1 terminated.
Philosopher p4 eating for 3 seconds with chopsticks cs4 and cs3.
Philosopher p5 thinking for 4 seconds.
Philosopher p2 eating for 4 seconds with chopsticks cs1 and cs2.
Philosopher p4 thinking for 4 seconds.
Philosopher p5 eating for 1 seconds with chopsticks cs5 and cs4.
Philosopher p2 thinking for 1 seconds.
p5 terminated.
Philosopher p2 eating for 4 seconds with chopsticks cs1 and cs2.
Philosopher p4 eating for 3 seconds with chopsticks cs4 and cs3.
p4 terminated.
p2 terminated.


% same problem as above but using a parametric object for representing the philosophers:

| ?- threaded_ignore(philosopher(p1,cs1,cs2)::run(5, 5)), threaded_ignore(philosopher(p2,cs2,cs3)::run(5, 5)), threaded_ignore(philosopher(p3,cs3,cs4)::run(5, 5)), threaded_ignore(philosopher(p4,cs4,cs5)::run(5, 5)), threaded_ignore(philosopher(p5,cs1,cs5)::run(5, 5)).