com.android.ddmlib

Class HeapSegment

java.lang.Object

com.android.ddmlib.HeapSegment

All Implemented Interfaces:

java.lang.Comparable<HeapSegment>

public final class HeapSegment
extends java.lang.Object
implements java.lang.Comparable<HeapSegment>

Describes the types and locations of objects in a segment of a heap.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	HeapSegment.HeapSegmentElement Describes an object/region encoded in the HPSG data.

Field Summary

Fields

Modifier and Type	Field and Description
protected int	mAllocationUnitCount
protected int	mAllocationUnitSize
protected int	mHeapId
protected int	mOffset
protected long	mStartAddress
protected java.nio.ByteBuffer	mUsageData

Constructor Summary

Constructors

Constructor and Description
HeapSegment(java.nio.ByteBuffer hpsgData) Create a new HeapSegment based on the raw contents of an HPSG chunk.

Method Summary

Modifier and Type	Method and Description
boolean	append(HeapSegment other) Append the contents of other to this segment if it describes the segment immediately after this one.
boolean	canAppend(HeapSegment other) See if other comes immediately after this segment.
int	compareTo(HeapSegment other)
boolean	equals(java.lang.Object o)
long	getEndAddress()
int	getLength()
HeapSegment.HeapSegmentElement	getNextElement(HeapSegment.HeapSegmentElement reuse)
long	getStartAddress()
int	hashCode()
boolean	isValid() See if this segment still contains data, and has not been appended to another segment.
void	rewindElements()
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

mHeapId

protected int mHeapId

mAllocationUnitSize

protected int mAllocationUnitSize

mStartAddress

protected long mStartAddress

mOffset

protected int mOffset

mAllocationUnitCount

protected int mAllocationUnitCount

mUsageData

protected java.nio.ByteBuffer mUsageData

Constructor Detail

HeapSegment

public HeapSegment(java.nio.ByteBuffer hpsgData)
            throws java.nio.BufferUnderflowException

Create a new HeapSegment based on the raw contents of an HPSG chunk.

Parameters:

hpsgData - The raw data from an HPSG chunk.

Throws:

java.nio.BufferUnderflowException - if hpsgData is too small to hold the HPSG chunk header data.

Method Detail

isValid

public boolean isValid()

See if this segment still contains data, and has not been appended to another segment.

Returns:

true if this segment has not been appended to another segment.

canAppend

public boolean canAppend(HeapSegment other)

See if other comes immediately after this segment.

Parameters:

other - The HeapSegment to check.

Returns:

true if other comes immediately after this segment.

append

public boolean append(HeapSegment other)

Append the contents of other to this segment if it describes the segment immediately after this one.

Parameters:

other - The segment to append to this segment, if possible. If appended, other will be invalid when this method returns.

Returns:

true if other was successfully appended to this segment.

getStartAddress

public long getStartAddress()

getLength

public int getLength()

getEndAddress

public long getEndAddress()

rewindElements

public void rewindElements()

getNextElement

public HeapSegment.HeapSegmentElement getNextElement(HeapSegment.HeapSegmentElement reuse)

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

compareTo

public int compareTo(@NonNull
                     HeapSegment other)

Specified by:

compareTo in interface java.lang.Comparable<HeapSegment>