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.succeed(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
  5. Any
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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(classOf[java.lang.CloneNotSupportedException])
  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: UIO[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[R, B](f: (A) ⇒ ZIO[R, Nothing, (B, A)]): ZIO[R, 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 modifySome[R, B](default: B)(pf: PartialFunction[A, ZIO[R, Nothing, (B, A)]]): ZIO[R, Nothing, B]

    Atomically modifies the RefM with the specified function, which computes a return value for the modification if the function is defined in the current value otherwise it returns a default value.

    Atomically modifies the RefM with the specified function, which computes a return value for the modification if the function is defined in the current value otherwise it returns a default value. This is a more powerful version of updateSome.

  15. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  16. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  17. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  18. final def set(a: A): UIO[Unit]

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

  19. final def setAsync(a: A): UIO[Unit]

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

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

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

  23. final def updateSome[R](pf: PartialFunction[A, ZIO[R, Nothing, A]]): ZIO[R, Nothing, A]

    Atomically modifies the RefM with the specified partial function.

    Atomically modifies the RefM with the specified partial function. if the function is undefined in the current value it returns the old value without changing it.

  24. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  25. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  26. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @native() @throws(classOf[java.lang.InterruptedException])

Inherited from Serializable

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

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