Changeset 9475:6f76e7b25361
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ruby: Atomic Message Interface Support

This patch adds Atomic Message Interfaces to SLICC/Ruby.  AMIs look a lot like
conventional MessageBuffers, except they guarantee immediate consumption of
an enqueued message by the receiving controller, before any other activity.
This feature simplifies protocols with co-located controllers where messages
and information can be passed between the two, without worrying about
unecessary races.