Instance Methodswift-nio 2.72.0NIOConcurrencyHelpers
compareAndExchange(expected:desired:)
Atomically compares the value against expected and, if they are equal, replaces the value with desired.
This declaration is deprecated: please use ManagedAtomic from https://github.com/apple/swift-atomics instead
func compareAndExchange(expected: T, desired: T) -> Bool Parameters
Returns
True if the exchange occurred, or False if expected did not match the current value and so no exchange occurred.
This implementation conforms to C11’s atomic_compare_exchange_strong. This means that the compare-and-swap will always succeed if expected is equal to value. Additionally, it uses a sequentially consistent ordering. For more details on atomic memory models, check the documentation for C11’s stdatomic.h.
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Type members
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static func makeAtomic(value: T) -> NIOAtomic Create an atomic object with
value
Instance members
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func add(T) -> T Atomically adds
rhsto this object.func exchange(with: T) -> T Atomically exchanges
valuefor the current value of this object.func load() -> T Atomically loads and returns the value of this object.
func store(T) Atomically replaces the value of this object with
value.func sub(T) -> T Atomically subtracts
rhsfrom this object.