FrameIndexRef

A reference that boxes a FrameIndex possibly using a thread-local.

This definition is of interest only when creating tasks with Task.unsafeCreate, which exposes internals and is considered unsafe to use.

In case the Task is executed with BatchedExecution, this class boxes a FrameIndex in order to transport it over light async boundaries, possibly using a ThreadLocal, since this index is not supposed to survive when threads get forked.

The FrameIndex is a counter that increments whenever a flatMap operation is evaluated. And with BatchedExecution, whenever that counter exceeds the specified threshold, an asynchronous boundary is automatically inserted. However this capability doesn't blend well with light asynchronous boundaries, for example Async tasks that never fork logical threads or TrampolinedRunnable instances executed by capable schedulers. This is why FrameIndexRef is part of the Context of execution for Task, available for asynchronous tasks that get created with Task.unsafeCreate.

Note that in case the execution model is not BatchedExecution then this reference is just a dummy, since there's no point in keeping a counter around, plus setting and fetching from a ThreadLocal can be quite expensive.

Linear Supertypes

AnyRef, Any

Abstract Value Members

abstract def :=(update: FrameIndex): Unit

Stores a new FrameIndex.
abstract def apply(): FrameIndex

Returns the current FrameIndex.
abstract def reset(): Unit

Resets the stored FrameIndex to 1, which is the default value that should be used after an asynchronous boundary happened.

Concrete Value Members

final def !=(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def ##(): Int

Definition Classes
AnyRef → Any
final def ==(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def asInstanceOf[T0]: T0

Definition Classes
Any
def clone(): AnyRef

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( ... )
final def eq(arg0: AnyRef): Boolean

Definition Classes
AnyRef
def equals(arg0: Any): Boolean

Definition Classes
AnyRef → Any
def finalize(): Unit

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( classOf[java.lang.Throwable] )
final def getClass(): Class[_]

Definition Classes
AnyRef → Any
def hashCode(): Int

Definition Classes
AnyRef → Any
final def isInstanceOf[T0]: Boolean

Definition Classes
Any
final def ne(arg0: AnyRef): Boolean

Definition Classes
AnyRef
final def notify(): Unit

Definition Classes
AnyRef
final def notifyAll(): Unit

Definition Classes
AnyRef
final def synchronized[T0](arg0: ⇒ T0): T0

Definition Classes
AnyRef
def toString(): String

Definition Classes
AnyRef → Any
final def wait(): Unit

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

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )

Related Docs: object FrameIndexRef | package Task

sealed abstract class FrameIndexRef extends AnyRef

Abstract Value Members

abstract def :=(update: FrameIndex): Unit

abstract def apply(): FrameIndex

abstract def reset(): Unit

Concrete Value Members

final def !=(arg0: Any): Boolean

final def ##(): Int

final def ==(arg0: Any): Boolean

final def asInstanceOf[T0]: T0

def clone(): AnyRef

final def eq(arg0: AnyRef): Boolean

def equals(arg0: Any): Boolean

def finalize(): Unit

final def getClass(): Class[_]

def hashCode(): Int

final def isInstanceOf[T0]: Boolean

final def ne(arg0: AnyRef): Boolean

final def notify(): Unit

final def notifyAll(): Unit

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

def toString(): String

final def wait(): Unit

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

final def wait(arg0: Long): Unit

Inherited from AnyRef

Inherited from Any

Ungrouped