Concurrency control | Computer arithmetic

Fetch-and-add

In computer science, the fetch-and-add CPU instruction (FAA) atomically increments the contents of a memory location by a specified value. That is, fetch-and-add performs the operation increment the value at address x by a, where x is a memory location and a is some value, and return the original value at x in such a way that if this operation is executed by one process in a concurrent system, no other process will ever see an intermediate result. Fetch-and-add can be used to implement concurrency control structures such as mutex locks and semaphores. (Wikipedia).

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From playlist Vectors

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From playlist Vectors

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From playlist PreAlgebra

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From playlist How to add a book in your course

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From playlist Computer Hardware and Architecture

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From playlist JavaScript

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Related pages

Ticket lock | Race condition | Read–modify–write | Critical section | Concurrency control | Load-link/store-conditional | Test-and-set | Test and test-and-set | Kernel preemption | Mutual exclusion | Compare-and-swap | Consensus (computer science) | Semaphore (programming)