NDLI: A compositional theory for STM Haskell

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A compositional theory for STM Haskell

Content Provider	ACM Digital Library
Author	Borgström, Johannes Bhargavan, Karthikeyan Gordon, Andrew D.
Abstract	We address the problem of reasoning about Haskell programs that use Software Transactional Memory (STM). As a motivating example, we consider Haskell code for a concurrent non-deterministic tree rewriting algorithm implementing the operational semantics of the ambient calculus. The core of our theory is a uniform model, in the spirit of process calculi, of the run-time state of multi-threaded STM Haskell programs. The model was designed to simplify both local and compositional reasoning about STM programs. A single reduction relation captures both pure functional computations and also effectful computations in the STM and I/O monads. We state and prove liveness, soundness, completeness, safety, and termination properties relating source processes and their Haskell implementation. Our proof exploits various ideas from concurrency theory, such as the bisimulation technique, but in the setting of a widely used programming language rather than an abstract process calculus. Additionally, we develop an equational theory for reasoning about STM Haskell programs, and establish for the first time equations conjectured by the designers of STM Haskell. We conclude that using a pure functional language extended with STM facilitates reasoning about concurrent implementation code.
Starting Page	69
Ending Page	80
Page Count	12
File Format	PDF MP4
ISBN	9781605585086
DOI	10.1145/1596638.1596648
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2009-09-03
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Ambient calculus Compositional reasoning Transactional memory
Content Type	Audio Text
Resource Type	Article

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