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Reference.org
Concurrent data structure
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<p>In <a href="/facts/Computer_science/lN3pEyPz">computer science</a>, a concurrent data structure (also called shared data structure) is a data structure designed for access and modification by multiple computing <a href="/facts/Thread_(computer_science)/hh8WHyPd">threads</a> (or <a href="/facts/Process_(computing)/Vcq7EnUV">processes</a> or nodes) on a computer, for example concurrent <a href="/facts/Message_queue/Kq7kX86w">queues</a>, concurrent <a href="/facts/Stack_(abstract_data_type)/bj7l94v1">stacks</a> etc. The concurrent data structure is typically considered to reside in an abstract storage environment known as shared memory, which may be physically implemented as either a tightly coupled or a distributed collection of storage modules. </p>