如何实现延续？ [英] How to implement continuations?

问题描述

我正在写在C的方案间preTER目前，它使用C运行时堆栈自己的堆栈，这是presenting一个小问题与执行的延续。我目前的解决方案是C叠堆需要的时候再拷贝回来的手动复制。除了不是标准C，这个解决方案是很难的理想选择。

I'm working on a Scheme interpreter written in C. Currently it uses the C runtime stack as its own stack, which is presenting a minor problem with implementing continuations. My current solution is manual copying of the C stack to the heap then copying it back when needed. Aside from not being standard C, this solution is hardly ideal.

什么是落实℃，计划延续的最简单方法。

What is the simplest way to implement continuations for Scheme in C?

推荐答案

我记得读，可能会帮上你的文章？的 切尼在MTA 的： - ）

I remember reading an article that may be of help to you: Cheney on the M.T.A. :-)

方案的某些实现我所知道的，如 SISC ，分配在堆上他们呼吁帧。

Some implementations of Scheme I know of, such as SISC, allocate their call frames on the heap.

@ollie：你不需要做吊装如果所有的呼叫帧是在堆上。有一个折中的性能，当然：时间葫芦，与所需的开销分配在堆上所有帧。也许这应该是跨preTER可调runtime参数。 :-P

@ollie: You don't need to do the hoisting if all your call frames are on the heap. There's a tradeoff in performance, of course: the time to hoist, versus the overhead required to allocate all frames on the heap. Maybe it should be a tunable runtime parameter in the interpreter. :-P

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