Package io.perfmark.java7

Class SecretGenerator.MethodHandleGenerator

java.lang.Object

io.perfmark.impl.Generator

io.perfmark.java7.SecretGenerator.MethodHandleGenerator

Enclosing class:

SecretGenerator

public static final class SecretGenerator.MethodHandleGenerator
extends Generator

Field Summary

Fields

Modifier and Type	Field	Description
private static final MutableCallSite	currentGeneration
private static final MethodHandle	currentGenerationGetter
private static final MutableCallSite[]	currentGenerations

Fields inherited from class io.perfmark.impl.Generator

FAILURE, GEN_OFFSET

Constructor Summary

Constructors

Constructor	Description
MethodHandleGenerator()

Method Summary

Modifier and Type	Method	Description
long	costOfGetNanos()	Returns the approximate cost to read the generation.
long	costOfSetNanos()	Returns the approximate cost to change the generation.
long	getGeneration()	Gets the current generation, shifted left by Generator.GEN_OFFSET.
void	setGeneration(long generation)	Sets the current generation count.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

currentGeneration

private static final MutableCallSite currentGeneration

currentGenerations

private static final MutableCallSite[] currentGenerations

currentGenerationGetter

private static final MethodHandle currentGenerationGetter

Constructor Details

MethodHandleGenerator

public MethodHandleGenerator()

Method Details

getGeneration

public long getGeneration()

Description copied from class: Generator

Gets the current generation, shifted left by Generator.GEN_OFFSET. An odd number means the library is enabled, while an even number means the library is disabled.

Overrides:

getGeneration in class Generator

Returns:

the current generation or Generator.FAILURE.

setGeneration

public void setGeneration(long generation)

Description copied from class: Generator

Sets the current generation count. This should be eventually noticeable for callers of Generator.getGeneration(). An odd number means the library is enabled, while an even number means the library is disabled.

Overrides:

setGeneration in class Generator

Parameters:

generation - the generation id, shifted left by Generator.GEN_OFFSET.

costOfGetNanos

public long costOfGetNanos()

Description copied from class: Generator

Returns the approximate cost to read the generation.

Overrides:

costOfGetNanos in class Generator

Returns:

an approximate number of nanoseconds needed to read the generator value.

costOfSetNanos

public long costOfSetNanos()

Description copied from class: Generator

Returns the approximate cost to change the generation.

Overrides:

costOfSetNanos in class Generator

Returns:

an approximate number of nanoseconds needed to change the generator value.