Active data structure


Active data structure

A data structure with an associated thread or process that performs internal operations to give the external behavior of another, usually more general, data structure.

For example, a queue is usually considered to be unbounded. However, actual queues provided by the hardware or operating system may be significantly limited. Changing the writing and reading processes to use a bounded queuemakes those applications more complicated. However, an active queue can acceptinput from the writer through a system queue, and save items in memory or ondisk if the other system queue for the reader is full. When the reader's queuehas space, items can be retrieved and put back in the queue. Although there arenow three components, rather than just the writer and reader, the high levelabstraction is very simple and clear.

ee also

*passive data structure


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