ABSTRACT
A continuation represents the rest of computation from a given point. Scheme, a dialect of Lisp, provides a function to generate a continuation as a first-class object. Using Scheme continuations, we can express various control structures such as non-local exits and coroutines. The future construct, which provides the mechanisms of process creation and synchronization, is supported in many parallel Scheme languages. However, continuations of these languages are not powerful enough to describe parallel programs. This paper proposes an extension to Scheme continuations to make them adaptable to parallel environment based on the future construct.
