Packages

final class RefM[A] extends Serializable

A mutable atomic reference for the IO monad. This is the IO equivalent of a volatile var, augmented with atomic effectful operations, which make it useful as a reasonably efficient (if low-level) concurrency primitive.

Unlike Ref, RefM allows effects in atomic operations, which makes the structure slower but more powerful than Ref.

for {
  ref <- RefM(2)
  v   <- ref.update(_ + putStrLn("Hello World!").attempt.void *> IO.now(3))
  _   <- putStrLn("Value = " + v) // Value = 5
} yield ()
Linear Supertypes
Serializable, Serializable, AnyRef, Any
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  1. RefM
  2. Serializable
  3. Serializable
  4. AnyRef
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Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  4. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  5. def clone(): AnyRef
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @native() @throws( ... )
  6. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  7. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  8. def finalize(): Unit
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  9. final def get: IO[Nothing, A]

    Reads the value from the Ref.

  10. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  11. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  12. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  13. final def modify[B](f: (A) ⇒ IO[Nothing, (B, A)]): IO[Nothing, B]

    Atomically modifies the RefM with the specified function, which computes a return value for the modification.

    Atomically modifies the RefM with the specified function, which computes a return value for the modification. This is a more powerful version of update.

  14. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  15. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  16. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  17. final def set(a: A): IO[Nothing, Unit]

    Writes a new value to the Ref, with a guarantee of immediate consistency (at some cost to performance).

  18. final def setLater(a: A): IO[Nothing, Unit]

    Writes a new value to the Ref without providing a guarantee of immediate consistency.

  19. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  20. def toString(): String
    Definition Classes
    AnyRef → Any
  21. final def update(f: (A) ⇒ IO[Nothing, A]): IO[Nothing, A]

    Atomically modifies the RefM with the specified function, returning the value immediately after modification.

  22. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  23. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  24. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @native() @throws( ... )

Inherited from Serializable

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

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