Contrasting themes in the semantics of imperative concurrency

A survey is given of work performed by the authors in recent years concerning the semantics of imperative concurrency. Four sample languages are presented for which a number of operational and denotational semantic models are developed. All languages have parallel execution through interleaving, and the last three have as well a form of synchronization. Three languages are uniform, i.e., they have uninterpreted elementary actions; the fourth is …