Abstract
Most current programming languages do not restrict the use of the concurrency primitives they provide, leaving it to the programmer to detect data races. In this paper, we revisit the monitor concept, which guards against data races by guaranteeing that accesses to shared variables occurs only inside monitors, and show that this concept can be implemented in a programming language with referential semantics, given appropriate typing rules. We describe the Aria programming language, designed with native monitors according to these rules. Through the discussion of classic concurrency problems, we evaluate the use of Aria monitors for synchronization at different levels of granularity.
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