com.oracle.graal.replacements

Class SnippetCounter

java.lang.Object

com.oracle.graal.replacements.SnippetCounter

All Implemented Interfaces:

Comparable<SnippetCounter>

public class SnippetCounter
extends Object
implements Comparable<SnippetCounter>

A counter that can be safely incremented from within a snippet for gathering snippet specific metrics.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	SnippetCounter.Group A group of related counters.

Field Summary

Fields

Modifier and Type	Field and Description
private String	description
private SnippetCounter.Group	group
private static List<SnippetCounter.Group>	groups
private int	index
private String	name
private long	value

Constructor Summary

Constructors

Constructor and Description
SnippetCounter(SnippetCounter.Group group, String name, String description) Creates a counter.

Method Summary

Modifier and Type	Method and Description
void	add(int increment) Increments the value of this counter.
int	compareTo(SnippetCounter o) Sorts counters in descending order of their values.
void	inc() Increments the value of this counter.
static void	printGroups(PrintStream out) Prints all the counter groups to a given stream.
String	toString()
long	value() Gets the value of this counter.

Methods inherited from class java.lang.Object

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

Field Detail

groups

private static final List<SnippetCounter.Group> groups

group

private final SnippetCounter.Group group

index

private final int index

name

private final String name

description

private final String description

value

private long value

Constructor Detail

SnippetCounter

public SnippetCounter(SnippetCounter.Group group,
                      String name,
                      String description)

Creates a counter.

Parameters:

group - the group to which the counter belongs. If this is null, the newly created counter is disabled and incrementing is a no-op.

name - the name of the counter

description - a brief comment describing the metric represented by the counter

Method Detail

compareTo

public int compareTo(SnippetCounter o)

Sorts counters in descending order of their values.

Specified by:

compareTo in interface Comparable<SnippetCounter>

inc

public void inc()

Increments the value of this counter. This method can only be used in a snippet on a compile-time constant SnippetCounter object.

add

public void add(int increment)

Increments the value of this counter. This method can only be used in a snippet on a compile-time constant SnippetCounter object.

value

public long value()

Gets the value of this counter.

toString

public String toString()

Overrides:

toString in class Object

printGroups

public static void printGroups(PrintStream out)

Prints all the counter groups to a given stream.