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threads - birthdays

This folder contains a simple multi-threading example with agents and their birthdays, illustrating the use of the built-in predicates threaded_ignore/1, threaded_once/1, and threaded_exit/1.

When using XVM as the backend, this example must be run from the top-level interpreter.

Print Logtalk, Prolog backend, and kernel versions (if running as a notebook):

%versions

Load the example:

logtalk_load(birthdays(loader)).

Create two new agents, Paul and Nathalie:

agent::(new(paul, 40, male), new(nathalie, 32, female)).

<!-- true. -->

Make them friends:

paul::new_friend(nathalie).

<!-- true. -->

Turn event support on for messages sent at the command-line (i.e., for messages sent from the pseudo-object user):

set_logtalk_flag(events, allow).

<!-- true. -->

It's birthday for Nathalie:

nathalie::birthday.

<!-- Happy birthday from paul! Thanks! Here, have a slice of cake, paul. Thanks for the cake nathalie! Say goodbye to your 32's!

true. -->

Ask Nathalie her age:

nathalie::age(Age).

<!-- Age = 33. -->

A year goes by...

nathalie::birthday.

<!-- Happy birthday from paul! Thanks! Here, have a slice of cake, paul. Thanks for the cake nathalie! Say goodbye to your 33's!

true. -->

Turn event support off:

set_logtalk_flag(events, deny).

<!-- true. -->