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# threads - blackboard

This folder contains a simple multi-threading example illustrating how
to use the Logtalk built-in predicates `threaded_wait/1` and `threaded_notify/1`
for synchronizing threads using shared resources. The example consists of
two persons, a student and a teacher, sharing a blackboard chalk and eraser.

This example should preferably be run from the top-level instead of as
a notebook to observe the threads output.

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

```logtalk
%versions
```

Start by loading the example and the required library files:

```logtalk
logtalk_load(blackboard(loader)).
```

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

```logtalk
threaded_ignore(student::run(10)), threaded_ignore(teacher::run(4)).
```

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