" Basically there are two models of concurrency: Shared state concurrency Messag... | Hacker News

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		aneth on March 4, 2011 \| parent \| context \| favorite \| on: Erlang - Not just fault tolerant, but highly fault... " Basically there are two models of concurrency: `Shared state concurrency Message passing concurrency` " Wouldn't the node.js style callbacks be a third type of concurrency? It's similar to message passing, but quite different from the user's perspective.

oomkiller on March 5, 2011 [–]

He did qualify that statement with "basically" and if you think about it, a "callback" function really is just sending a message.

aneth on March 6, 2011 | [–]

Yes, however at the implementation level, message based concurrency is shared memory concurrency (as I understand anyway.) Callbacks seem to me an entirely a different abstraction.

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