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# threads - checkpoint

This folder contains an implementation of multi-threading barrier
synchronization task and it was coded for a contribution to the
Rosetta Code website.

For more information see:

https://rosettacode.org/wiki/Checkpoint_synchronization

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):

```logtalk
%versions
```

Start by loading the example:

```logtalk
logtalk_load(checkpoint(loader)).
```

Run example:

```logtalk
checkpoint::run.
```

<!--
Worker 1 item 3
Worker 2 item 3
Worker 5 item 3
Worker 3 item 3
Worker 4 item 3
Assembly of item 3 done.
Worker 1 item 2
Worker 5 item 2
Worker 2 item 2
Worker 3 item 2
Worker 4 item 2
Assembly of item 2 done.
Worker 2 item 1
Worker 5 item 1
Worker 3 item 1
Worker 1 item 1
Worker 4 item 1
Assembly of item 1 done.
All assemblies done.

true.
-->
