[plt-scheme] Continuations

From: Matthew Flatt (mflatt at cs.utah.edu)
Date: Tue Nov 14 20:00:26 EST 2006

At Wed, 15 Nov 2006 04:03:28 +0530, "Akhilesh Mritunjai" wrote:
> 1. Does PLTScheme use a C stack or a stack of its own for scheme
> programs, specifically for continuations (saving and resumption
> thereof) ?

It uses the C stack, although this is largely hidden from the outside
(e.g., there are no visible stack overflows).

> 2. Lets say I have a particular program running in two instances of
> PLTScheme runtime (R1 and R2). I am looking to advice and conceptual
> issues associated with an attempt to serialize a continuation in R1
> and later deserialize in R2 and invoke it.

As you no doubt expect from the answer to #1, MzScheme's implementation
of continuations is not well suited to this task.

I think others have worked on transforming programs (by CPSing and
making free variables explicit) to support serialized continuations,
but I'm not sure of the details.


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