Is it possible to implement coroutines using only LISP primitives?

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+4 Q:

Is it possible to implement coroutines using only LISP primitives?

First, I'm a LISP newbie.

What I want to get is a cooperative micro-threading feature. And this can be gained with coroutine. As I know, Scheme supports coroutines via continuations. However, not all Scheme implementation may have continuations. If so, can I add a continuation feature with only LISP primitives?

+4 A:

You can. Chapters 5 and 6 of Essentials of Programming Languages shows how to implement continuations in Scheme. In his book On Lisp, Paul Graham explains how to implement continuations in Common Lisp (Chapters 20-22).

Vijay Mathew 2010-08-09 04:43:59

These 'continuations' for CL are relatively limited, I'd think.

Rainer Joswig 2010-08-09 07:07:46

@Rainer Can I know about the limitation?

Eonil 2010-08-09 08:22:55

@Eonil On Lisp contains an implementation of multi-threading on continuations, so co-routines also might be possible with that implementation.

Vijay Mathew 2010-08-09 10:46:26

@Vijay Yes, thanks again!

Eonil 2010-08-10 00:52:46

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Is it possible to implement coroutines using only LISP primitives?

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