getAndAdd
GetAndAdd is an atomic operation used in concurrent programming. It combines two actions into one indivisible step: it reads the current value, adds a specified delta, and stores the result, all without interruption. The method returns the value that existed before the addition, making it useful for implementing lock-free counters and indices.
Semantics and behavior: getAndAdd guarantees that no other thread observes an intermediate state between reading the
Common variants and naming: many libraries expose a method with a similar purpose under names such as
Typical use cases: implementing thread-safe counters, indexes for work-stealing queues, or other shared numeric state without
Implementation notes: the operation is typically supported directly by atomic hardware primitives or built atop compare-and-swap