org.mmtk.policy

Class MarkCompactCollector.FromCursor

java.lang.Object

org.mmtk.policy.MarkCompactCollector.RegionCursor

org.mmtk.policy.MarkCompactCollector.FromCursor

Enclosing class:

MarkCompactCollector

private static final class MarkCompactCollector.FromCursor
extends MarkCompactCollector.RegionCursor

Subclass for the read-only cursor that leads the scan of regions.

Field Summary

Fields inherited from class org.mmtk.policy.MarkCompactCollector.RegionCursor

cursor, limit, region

Constructor Summary

Constructors

Constructor and Description
FromCursor()

Method Summary

Modifier and Type	Method and Description
(package private) void	advanceToNextForwardableRegion(MarkCompactSpace space) Advance the cursor either to the next region in the list, or to a new region allocated from the global list.
(package private) void	advanceToNextRegion() Override the superclass with an additional assertion - we only advance when we have read to the end, and the cursor must point *precisely* to the last allocated byte in the region.
(package private) ObjectReference	advanceToObject() Advance from the cursor to the start of the next object.
(package private) void	advanceToObjectEnd(ObjectReference current) Advances the cursor to the end of the given object.
(package private) boolean	hasMoreObjects()
(package private) void	init(Address region) Initialize the cursor - the limit is the end of the allocated data

Methods inherited from class org.mmtk.policy.MarkCompactCollector.RegionCursor

assertCursorInBounds, get, getLimit, getRegion, inc, incTo, isAvailable, isInRegion, isValid, print, sameRegion

Methods inherited from class java.lang.Object

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

Constructor Detail

FromCursor

FromCursor()

Method Detail

init

void init(Address region)

Initialize the cursor - the limit is the end of the allocated data

Specified by:

init in class MarkCompactCollector.RegionCursor

Parameters:

region - The region to be processed.

advanceToObject

ObjectReference advanceToObject()

Advance from the cursor to the start of the next object.

Returns:

The object reference of the next object.

advanceToObjectEnd

void advanceToObjectEnd(ObjectReference current)

Advances the cursor to the end of the given object.

Parameters:

current - the object's reference

advanceToNextForwardableRegion

void advanceToNextForwardableRegion(MarkCompactSpace space)

Advance the cursor either to the next region in the list, or to a new region allocated from the global list.

Parameters:

space - the space that acts as the global list

advanceToNextRegion

void advanceToNextRegion()

Override the superclass with an additional assertion - we only advance when we have read to the end, and the cursor must point *precisely* to the last allocated byte in the region.

Overrides:

advanceToNextRegion in class MarkCompactCollector.RegionCursor

hasMoreObjects

boolean hasMoreObjects()

Returns:

true if there are more objects in this region