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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(blackboard(loader)).
...


% start the producer and the consumer, each one running in its own thread:

| ?- threaded_ignore(teacher::run(4)), threaded_ignore(student::run(10)).

teacher is writing...
student is writing...
student is writing...
student is writing...
student is writing...
teacher is writing...
teacher is writing...
teacher is writing...
student is writing...
student is writing...
student is writing...
student is writing...
student is writing...
student is writing...