A Type System for Counting Logs of Multi-threaded Nested Transactional Programs

Abstract

We present a type system to estimate an upper bound for the resource consumption of nested and multi-threaded transactional programs. The resource is abstracted as transaction logs. In comparison to our previous work on type and effect systems for Transactional Featherweight Java, this work exploits the natural composition of thread creation to give types to sub-terms. As a result, our new type system is simpler and more effective than our previous one. More important, it is more precise than our previous type system. We also show a type inference algorithm that we have implemented in a prototype tool.