Class

scala.scalajs.js

FinalizationRegistry

Related Doc: package js

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class FinalizationRegistry[-A, -B, -C] extends Object

ECMAScript 2021

A FinalizationRegistry object lets you request a callback when an object is garbage-collected.

FinalizationRegistry provides a way to request that a cleanup callback get called at some point when an object registered with the registry has been reclaimed (garbage-collected). (Cleanup callbacks are sometimes called finalizers.)

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A

Type of the target object to register

B

Type of value to pass to the finalizer

C

Type of an unregistration token

Annotations
@JSType() @native() @JSGlobal()
Linear Supertypes
Object, Any, AnyRef, scala.Any
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  1. FinalizationRegistry
  2. Object
  3. Any
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  5. Any
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  1. by any2stringadd
  2. by StringFormat
  3. by Ensuring
  4. by ArrowAssoc
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Instance Constructors

  1. new FinalizationRegistry(finalizer: Function1[B, scala.Any])

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Value Members

  1. final def !=(arg0: scala.Any): Boolean

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    Definition Classes
    AnyRef → Any

  2. final def ##(): Int

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    Definition Classes
    AnyRef → Any

  3. def +(other: String): String

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    Implicit information
    This member is added by an implicit conversion from FinalizationRegistry[A, B, C] to any2stringadd[FinalizationRegistry[A, B, C]] performed by method any2stringadd in scala.Predef.
    Definition Classes
    any2stringadd

  4. def ->[B](y: B): (FinalizationRegistry[A, B, C], B)

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    Implicit information
    This member is added by an implicit conversion from FinalizationRegistry[A, B, C] to ArrowAssoc[FinalizationRegistry[A, B, C]] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @inline()

  5. final def ==(arg0: scala.Any): Boolean

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    AnyRef → Any

  6. final def asInstanceOf[T0]: T0

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    Definition Classes
    Any

  7. def clone(): AnyRef

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  8. def ensuring(cond: (FinalizationRegistry[A, B, C]) ⇒ Boolean, msg: ⇒ scala.Any): FinalizationRegistry[A, B, C]

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    Implicit information
    This member is added by an implicit conversion from FinalizationRegistry[A, B, C] to Ensuring[FinalizationRegistry[A, B, C]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring

  9. def ensuring(cond: (FinalizationRegistry[A, B, C]) ⇒ Boolean): FinalizationRegistry[A, B, C]

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    Implicit information
    This member is added by an implicit conversion from FinalizationRegistry[A, B, C] to Ensuring[FinalizationRegistry[A, B, C]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring

  10. def ensuring(cond: Boolean, msg: ⇒ scala.Any): FinalizationRegistry[A, B, C]

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    Implicit information
    This member is added by an implicit conversion from FinalizationRegistry[A, B, C] to Ensuring[FinalizationRegistry[A, B, C]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring

  11. def ensuring(cond: Boolean): FinalizationRegistry[A, B, C]

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    Implicit information
    This member is added by an implicit conversion from FinalizationRegistry[A, B, C] to Ensuring[FinalizationRegistry[A, B, C]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring

  12. final def eq(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef

  13. def equals(arg0: scala.Any): Boolean

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    Definition Classes
    AnyRef → Any

  14. def finalize(): Unit

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )

  15. def formatted(fmtstr: String): String

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    Implicit information
    This member is added by an implicit conversion from FinalizationRegistry[A, B, C] to StringFormat[FinalizationRegistry[A, B, C]] performed by method StringFormat in scala.Predef.
    Definition Classes
    StringFormat
    Annotations
    @inline()

  16. final def getClass(): Class[_]

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    Definition Classes
    AnyRef → Any

  17. def hasOwnProperty(v: String): Boolean

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    Tests whether this object has the specified property as a direct property.

    Tests whether this object has the specified property as a direct property.

    Unlike js.Object.hasProperty, this method does not check down the object's prototype chain.

    MDN

    Definition Classes
    Object

  18. def hashCode(): Int

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    Definition Classes
    AnyRef → Any

  19. final def isInstanceOf[T0]: Boolean

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    Definition Classes
    Any

  20. def isPrototypeOf(v: Object): Boolean

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    Tests whether this object is in the prototype chain of another object.

    Tests whether this object is in the prototype chain of another object.

    Definition Classes
    Object

  21. final def ne(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef

  22. final def notify(): Unit

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    Definition Classes
    AnyRef

  23. final def notifyAll(): Unit

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    Definition Classes
    AnyRef

  24. def propertyIsEnumerable(v: String): Boolean

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    Tests whether the specified property in an object can be enumerated by a call to js.Object.properties, with the exception of properties inherited through the prototype chain.

    Tests whether the specified property in an object can be enumerated by a call to js.Object.properties, with the exception of properties inherited through the prototype chain.

    If the object does not have the specified property, this method returns false.

    MDN

    Definition Classes
    Object

  25. def register(theObject: A, heldValue: B): Unit

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    The register method registers an object with a FinalizationRegistry instance so that if the object is garbage-collected, the registry's callback may get called.

    The register method registers an object with a FinalizationRegistry instance so that if the object is garbage-collected, the registry's callback may get called.

    theObject

    The target object to register.

    heldValue

    The value to pass to the finalizer for this object. This cannot be the target object.

  26. def register(theObject: A, heldValue: B, unregistrationToken: C): Unit

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    The register method registers an object with a FinalizationRegistry instance so that if the object is garbage-collected, the registry's callback may get called.

    The register method registers an object with a FinalizationRegistry instance so that if the object is garbage-collected, the registry's callback may get called.

    theObject

    The target object to register.

    heldValue

    The value to pass to the finalizer for this object. This cannot be the target object.

    unregistrationToken

    A token that may be used with the unregister method later to unregister the target object. If provided (and not undefined), this must be an object. If not provided, the target cannot be unregistered.

  27. final def synchronized[T0](arg0: ⇒ T0): T0

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    Definition Classes
    AnyRef

  28. def toLocaleString(): String

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    Definition Classes
    Object

  29. def toString(): String

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    Definition Classes
    AnyRef → Any

  30. def unregister(unregistrationToken: C): Boolean

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    The unregister unregisters a target object from a FinalizationRegistry instance.

    The unregister unregisters a target object from a FinalizationRegistry instance.

    When a target object has been reclaimed, it is no longer registered in the registry. There is no need to all unregister in your cleanup callback. Only call unregister if you haven't received a cleanup callback and no longer need to receive one.

    unregistrationToken

    The token used with the register method when registering the target object.

  31. def valueOf(): scala.Any

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    Definition Classes
    Object

  32. final def wait(): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  33. final def wait(arg0: Long, arg1: Int): Unit

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    AnyRef
    Annotations
    @throws( ... )

  34. final def wait(arg0: Long): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  35. def →[B](y: B): (FinalizationRegistry[A, B, C], B)

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    Implicit information
    This member is added by an implicit conversion from FinalizationRegistry[A, B, C] to ArrowAssoc[FinalizationRegistry[A, B, C]] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc

Inherited from Object

Inherited from Any

Inherited from AnyRef

Inherited from scala.Any

Inherited by implicit conversion any2stringadd from FinalizationRegistry[A, B, C] to any2stringadd[FinalizationRegistry[A, B, C]]

Inherited by implicit conversion StringFormat from FinalizationRegistry[A, B, C] to StringFormat[FinalizationRegistry[A, B, C]]

Inherited by implicit conversion Ensuring from FinalizationRegistry[A, B, C] to Ensuring[FinalizationRegistry[A, B, C]]

Inherited by implicit conversion ArrowAssoc from FinalizationRegistry[A, B, C] to ArrowAssoc[FinalizationRegistry[A, B, C]]

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