Package uk.ac.manchester.spinnaker.messages.model

Class HeapElement

java.lang.Object

uk.ac.manchester.spinnaker.messages.model.HeapElement

@SARKStruct("block")
public class HeapElement
extends Object

An element of one of the heaps on SpiNNaker.

Field Summary

Fields

Modifier and Type	Field	Description
AppID	appID	The application ID of the block if allocated, or null if not.
MemoryLocation	blockAddress	The address of the block.
boolean	isFree	True if the block is free.
MemoryLocation	nextAddress	A pointer to the next block, or 0 if none.
int	size	The usable size of this block (not including the header).
Integer	tag	The tag of the block if allocated, or null if not.

Constructor Summary

Constructors

Constructor	Description
HeapElement(MemoryLocation blockAddress, MemoryLocation nextAddress, int free)

Method Summary

Modifier and Type	Method	Description
MemoryLocation	getDataAddress()	Gets the address of the data in the heap element.

Methods inherited from class java.lang.Object

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

Field Details

blockAddress

public final MemoryLocation blockAddress

The address of the block.

nextAddress

@SARKField("next") public final MemoryLocation nextAddress

A pointer to the next block, or 0 if none.

size

public final int size

The usable size of this block (not including the header).

isFree

@SARKField("free") public final boolean isFree

True if the block is free.

tag

@SARKField("free") public final Integer tag

The tag of the block if allocated, or null if not.

appID

@SARKField("free") public final AppID appID

The application ID of the block if allocated, or null if not.

Constructor Details

HeapElement

public HeapElement(MemoryLocation blockAddress, MemoryLocation nextAddress, int free)

Parameters:

blockAddress - The address of this element on the heap

nextAddress - The address of the next element on the heap

free - The "free" element of the block as read from the heap

Method Details

getDataAddress

public final MemoryLocation getDataAddress()

Gets the address of the data in the heap element.

Returns:

The address of the data (size bytes long) that immediately follows the heap element header.