---

This file is part of Logtalk https://logtalk.org/ SPDX-FileCopyrightText: 1998-2023 Paulo Moura <pmoura@logtalk.org> SPDX-License-Identifier: Apache-2.0

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

% 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)).