one.nio.mem

Class FixedSizeAllocator

java.lang.Object

one.nio.mem.FixedSizeAllocator

All Implemented Interfaces:

Allocator

public class FixedSizeAllocator
extends Object
implements Allocator

Field Summary

Fields

Modifier and Type	Field and Description
protected long	chunkSize
protected long	entrySize
protected long	head
protected static long	headOffset
protected long	totalMemory

Constructor Summary

Constructors

Constructor and Description
FixedSizeAllocator(long entrySize, long chunkSize)
FixedSizeAllocator(long startAddress, long totalMemory, long entrySize)
FixedSizeAllocator(long startAddress, long totalMemory, long entrySize, long head)

Method Summary

Modifier and Type	Method and Description
long	calloc(int size)
long	chunkSize()
int	countFreePages()
long	entrySize()
void	free(long entry)
protected long	getMemoryFromSystem(long size)
long	malloc()
long	malloc(int size)
static void	relocate(long currentPtr, long delta)
long	totalMemory()
void	verify() Verify the layout of the heap.

Methods inherited from class java.lang.Object

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

Field Detail

headOffset

protected static final long headOffset

head

protected volatile long head

entrySize

protected long entrySize

chunkSize

protected long chunkSize

totalMemory

protected long totalMemory

Constructor Detail

FixedSizeAllocator

public FixedSizeAllocator(long entrySize,
                          long chunkSize)

FixedSizeAllocator

public FixedSizeAllocator(long startAddress,
                          long totalMemory,
                          long entrySize)

FixedSizeAllocator

public FixedSizeAllocator(long startAddress,
                          long totalMemory,
                          long entrySize,
                          long head)

Method Detail

relocate

public static void relocate(long currentPtr,
                            long delta)

countFreePages

public int countFreePages()

entrySize

public long entrySize()

chunkSize

public long chunkSize()

totalMemory

public long totalMemory()

malloc

public long malloc()

malloc

public long malloc(int size)

Specified by:

malloc in interface Allocator

calloc

public long calloc(int size)

Specified by:

calloc in interface Allocator

free

public void free(long entry)

Specified by:

free in interface Allocator

verify

public void verify()

Description copied from interface: Allocator

Verify the layout of the heap. Expensive operation, used only for debugging purposes.

Specified by:

verify in interface Allocator

getMemoryFromSystem

protected long getMemoryFromSystem(long size)