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engines - whisper

This example creates a chain of engines passing a term. The original example was written by Jan Wielemaker. Currently it runs on ECLiPSe, SWI-Prolog, and XVM. It should run also on XSB and YAP if and when these systems bugs with coroutining and/or threads get fixed.

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(whisper(loader)).

Some sample queries:

whisper::whisper(0, 1, Final).

<!-- 1

Final = 1. -->

whisper::whisper(1, 1, Final).

<!-- Sending 2 to engine 2 2

Final = 2. -->

whisper::whisper(3, 1, Final).

<!-- Sending 2 to engine 6 Sending 3 to engine 5 Sending 4 to engine 4 4

Final = 4. -->

whisper::whisper(5, 3, Final).

<!-- Sending 4 to engine 12 Sending 5 to engine 11 Sending 6 to engine 10 Sending 7 to engine 9 Sending 8 to engine 8 8

Final = 8. -->