A model of cooperative threads

Abstract

Abstract. We develop a model of concurrent imperative programming with threads. We focus on a small imperative language with cooperative threads which execute without inter-ruption until they terminate or explicitly yield control. We define and study a trace-based denotational semantics for this language; this semantics is fully abstract but mathemat-ically elementary. We also give an equational theory for the computational effects that underlie the language, including thread spawning. We then analyze threads in terms of the free algebra monad for this theory. 1.