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  • package monix
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  • package execution
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  • package atomic

    A small toolkit of classes that support compare-and-swap semantics for safe mutation of variables.

    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:

    def compareAndSet(expect: T, update: T): Boolean

    This method atomically sets a variable to the update value if it currently holds the expect value, reporting true on success or false on 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 from AtomicNumber[A]):

    val atomicNumber = Atomic(12.2)

atomicNumber.incrementAndGet()
// => 13.2

    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...).

    Definition Classes
    execution
  • Atomic
  • AtomicAny
  • AtomicBoolean
  • AtomicBuilder
  • AtomicByte
  • AtomicChar
  • AtomicDouble
  • AtomicFloat
  • AtomicInt
  • AtomicLong
  • AtomicNumber
  • AtomicNumberAny
  • AtomicShort
  • PaddingStrategy

object PaddingStrategy

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  20. object Left128 extends PaddingStrategy with Product with Serializable

    A PaddingStrategy that applies padding to the left of our atomic value for a total cache line of 64 bytes (8 longs).

    A PaddingStrategy that applies padding to the left of our atomic value for a total cache line of 64 bytes (8 longs).

    Note the actual padding applied will be less, like 112 bytes, because we take into account the object's header and the the stored value.

  21. object Left64 extends PaddingStrategy with Product with Serializable

    A PaddingStrategy that applies padding to the left of our atomic value for a total cache line of 64 bytes (8 longs).

    A PaddingStrategy that applies padding to the left of our atomic value for a total cache line of 64 bytes (8 longs).

    Note the actual padding applied will be less, like 48 or 52 bytes, because we take into account the object's header and the the stored value.

  22. object LeftRight128 extends PaddingStrategy with Product with Serializable

    A PaddingStrategy that applies padding both to the left and to the right of our atomic value for a total cache line of 128 bytes (16 longs).

    A PaddingStrategy that applies padding both to the left and to the right of our atomic value for a total cache line of 128 bytes (16 longs).

    Note the actual padding applied will be less, like 112 or 116 bytes, because we take into account the object's header and the stored value.

  23. object LeftRight256 extends PaddingStrategy with Product with Serializable

    A PaddingStrategy that applies padding both to the left and to the right of our atomic value for a total cache line of 128 bytes (16 longs).

    A PaddingStrategy that applies padding both to the left and to the right of our atomic value for a total cache line of 128 bytes (16 longs).

    Note the actual padding applied will be less, like 232/240 bytes, because we take into account the object's header and the stored value.

  24. object NoPadding extends PaddingStrategy with Product with Serializable

    A PaddingStrategy that specifies no padding should be applied.

    A PaddingStrategy that specifies no padding should be applied. This is the default.

  25. object Right128 extends PaddingStrategy with Product with Serializable

    A PaddingStrategy that applies padding to the right of our atomic value for a total cache line of 64 bytes (8 longs).

    A PaddingStrategy that applies padding to the right of our atomic value for a total cache line of 64 bytes (8 longs).

    Note the actual padding applied will be less, like 112 bytes, because we take into account the object's header and the the stored value.

  26. object Right64 extends PaddingStrategy with Product with Serializable

    A PaddingStrategy that applies padding to the right of our atomic value for a total cache line of 64 bytes (8 longs).

    A PaddingStrategy that applies padding to the right of our atomic value for a total cache line of 64 bytes (8 longs).

    Note the actual padding applied will be less, like 48 or 52 bytes, because we take into account the object's header and the the stored value.

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