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The authors present views, a new approach to controlling concurrency. Fine-grained locking is often necessary to increase concurrency. Correctly implementing fine-grained locking with today's concurrency primitives can be challenging| race conditions often plague programs with sophisticated locking schemes. Views ease the task of implementing sophisticated locking schemes and provide static checks to automatically detect many data races. Views consist of view declarations that describe which views of an object may be simultaneously held by different threads, which object fields may be accessed through a given view, and which methods can be called through a given view.
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