org.mmtk.plan

Class Trace

java.lang.Object

org.mmtk.plan.Trace

public class Trace
extends Object

This abstract class implements the core functionality for a transitive closure over the heap. This class holds the global state, TraceLocal and its super-classes handle per-thread state.

Field Summary

Fields

Modifier and Type	Field and Description
(package private) SharedDeque	rootLocationPool
(package private) SharedDeque	valuePool

Constructor Summary

Constructors

Constructor and Description
Trace(RawPageSpace metaDataSpace)

Method Summary

Modifier and Type	Method and Description
boolean	hasWork()
void	prepare() Prepare for a new collection pass.
void	prepareNonBlocking() Prepare for a new collection pass.
void	release() Release resources after completing a collection pass.

Methods inherited from class java.lang.Object

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

Field Detail

valuePool

final SharedDeque valuePool

rootLocationPool

final SharedDeque rootLocationPool

Constructor Detail

Trace

public Trace(RawPageSpace metaDataSpace)

Parameters:

metaDataSpace - the space to use for allocation for this instance

Method Detail

prepareNonBlocking

public void prepareNonBlocking()

Prepare for a new collection pass.

prepare

public void prepare()

Prepare for a new collection pass. All active GC threads take part.

release

public void release()

Release resources after completing a collection pass.

hasWork

public boolean hasWork()

Returns:

whether there is any work outstanding in this trace. That is are there any pages in the pools.