Class PoolSubpage<T>

java.lang.Object

io.netty.buffer.PoolSubpage<T>

All Implemented Interfaces:

PoolSubpageMetric

final class PoolSubpage<T>
extends Object
implements PoolSubpageMetric

Field Summary

Fields

Modifier and Type	Field	Description
private final long[]	bitmap
private final int	bitmapLength
(package private) final PoolChunk<T>	chunk
(package private) boolean	doNotDestroy
(package private) final int	elemSize
(package private) final int	headIndex
(package private) final ReentrantLock	lock
private final int	maxNumElems
(package private) PoolSubpage<T>	next
private int	nextAvail
private int	numAvail
private final int	pageShifts
(package private) PoolSubpage<T>	prev
private final int	runOffset
private final int	runSize

Constructor Summary

Constructors

Constructor	Description
PoolSubpage(int headIndex)	Special constructor that creates a linked list head
PoolSubpage(PoolSubpage<T> head, PoolChunk<T> chunk, int pageShifts, int runOffset, int runSize, int elemSize)

Method Summary

Modifier and Type	Method	Description
private void	addToPool(PoolSubpage<T> head)
(package private) long	allocate()	Returns the bitmap index of the subpage allocation.
(package private) void	destroy()
int	elementSize()	Return the size (in bytes) of the elements that will be allocated.
private int	findNextAvail()
private int	findNextAvail0(int i, long bits)
(package private) boolean	free(PoolSubpage<T> head, int bitmapIdx)
private int	getNextAvail()
(package private) boolean	isDoNotDestroy()
(package private) void	lock()
int	maxNumElements()	Return the number of maximal elements that can be allocated out of the sub-page.
int	numAvailable()	Return the number of available elements to be allocated.
int	pageSize()	Return the page size (in bytes) of this page.
private void	removeFromPool()
private void	setNextAvail(int bitmapIdx)
private long	toHandle(int bitmapIdx)
String	toString()
(package private) void	unlock()

Methods inherited from class Object

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

Field Details

chunk

final PoolChunk<T> chunk

elemSize

final int elemSize

pageShifts

private final int pageShifts

runOffset

private final int runOffset

runSize

private final int runSize

bitmap

private final long[] bitmap

bitmapLength

private final int bitmapLength

maxNumElems

private final int maxNumElems

headIndex

final int headIndex

prev

PoolSubpage<T> prev

next

PoolSubpage<T> next

doNotDestroy

boolean doNotDestroy

nextAvail

private int nextAvail

numAvail

private int numAvail

lock

final ReentrantLock lock

Constructor Details

PoolSubpage

PoolSubpage(int headIndex)

Special constructor that creates a linked list head

PoolSubpage

PoolSubpage(PoolSubpage<T> head,
 PoolChunk<T> chunk,
 int pageShifts,
 int runOffset,
 int runSize,
 int elemSize)

Method Details

allocate

long allocate()

Returns the bitmap index of the subpage allocation.

free

boolean free(PoolSubpage<T> head,
 int bitmapIdx)

Returns:

true if this subpage is in use. false if this subpage is not used by its chunk and thus it's OK to be released.

addToPool

private void addToPool(PoolSubpage<T> head)

removeFromPool

private void removeFromPool()

setNextAvail

private void setNextAvail(int bitmapIdx)

getNextAvail

private int getNextAvail()

findNextAvail

private int findNextAvail()

findNextAvail0

private int findNextAvail0(int i,
 long bits)

toHandle

private long toHandle(int bitmapIdx)

toString

public String toString()

Overrides:

toString in class Object

maxNumElements

public int maxNumElements()

Description copied from interface: PoolSubpageMetric

Return the number of maximal elements that can be allocated out of the sub-page.

Specified by:

maxNumElements in interface PoolSubpageMetric

numAvailable

public int numAvailable()

Description copied from interface: PoolSubpageMetric

Return the number of available elements to be allocated.

Specified by:

numAvailable in interface PoolSubpageMetric

elementSize

public int elementSize()

Description copied from interface: PoolSubpageMetric

Return the size (in bytes) of the elements that will be allocated.

Specified by:

elementSize in interface PoolSubpageMetric

pageSize

public int pageSize()

Description copied from interface: PoolSubpageMetric

Return the page size (in bytes) of this page.

Specified by:

pageSize in interface PoolSubpageMetric

isDoNotDestroy

boolean isDoNotDestroy()

destroy

void destroy()

lock

void lock()

unlock

void unlock()