atomic
Base trait of all atomic references, no matter the type.
Represents an Atomic reference holding a number, providing helpers for easily incrementing and decrementing it.
Represents an Atomic reference holding a number, providing helpers for easily incrementing and decrementing it.
should be something that's Numeric
For applying padding to atomic references, in order to reduce cache contention.
For applying padding to atomic references, in order to reduce
cache contention. JEP 142 should reduce the need for this along
with the @Contended annotation, however that might have
security restrictions, the runtime might not act on it since it's
just a recommendation, plus it's nice to provide backwards
compatibility.
See: http://mail.openjdk.java.net/pipermail/hotspot-dev/2012-November/007309.html
The default strategy is NoPadding. In order to apply padding, you can import an implicit into scope:
import import org.sincron.atomic.Atomic import org.sincron.atomic.PaddingStrategy.Right64 val paddedAtomic = Atomic(10)
A small toolkit of classes that support compare-and-swap semantics for safe mutation of variables.
On top of the JVM, this means dealing with lock-free thread-safe programming. Also works on top of Javascript, with Scala.js, for API compatibility purposes and because it's a useful way to box a value.
The backbone of Atomic references is this method:
This method atomically sets a variable to the
updatevalue if it currently holds theexpectvalue, reportingtrueon success orfalseon failure. The classes in this package also contain methods to get and unconditionally set values.Building a reference is easy with the provided constructor, which will automatically return the most specific type needed (in the following sample, that's an
AtomicDouble, inheriting fromAtomicNumber[T]):These also provide useful helpers for atomically mutating of values (i.e.
transform,transformAndGet,getAndTransform, etc...) or of numbers of any kind (incrementAndGet,getAndAdd, etc...).