Package org.jruby.ext.ffi.jffi

Class CachingNativeMemoryAllocator

java.lang.Object

org.jruby.ext.ffi.jffi.CachingNativeMemoryAllocator

final class CachingNativeMemoryAllocator
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
(package private) static final class	CachingNativeMemoryAllocator.AllocatedMemoryIO
private static final class	CachingNativeMemoryAllocator.AllocationGroup
private static final class	CachingNativeMemoryAllocator.Allocator
private static final class	CachingNativeMemoryAllocator.Bucket
private static final class	CachingNativeMemoryAllocator.Magazine
private static final class	CachingNativeMemoryAllocator.MemoryAllocation

Field Summary

Fields

Modifier and Type	Field	Description
private static final CachingNativeMemoryAllocator.Bucket[]	buckets	Keeps strong references to the memory bucket until cleanup
private static final ThreadLocal<Reference<CachingNativeMemoryAllocator.Allocator>>	currentAllocator
protected static final com.kenai.jffi.MemoryIO	IO
private static final Map<CachingNativeMemoryAllocator.AllocationGroup,Boolean>	referenceSet

Constructor Summary

Constructors

Constructor	Description
CachingNativeMemoryAllocator()

Method Summary

Modifier and Type	Method	Description
private static long	align(long offset, long align)
(package private) static MemoryIO	allocateAligned(Ruby runtime, int size, int align, boolean clear)	Allocates native memory, aligned to a minimum boundary.
(package private) static int	bucketIndex(int size)
(package private) static void	clearMemory(long address, int size)
(package private) static int	roundUpToPowerOf2(int n)

Methods inherited from class java.lang.Object

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

Field Details

IO

protected static final com.kenai.jffi.MemoryIO IO

buckets

private static final CachingNativeMemoryAllocator.Bucket[] buckets

Keeps strong references to the memory bucket until cleanup

referenceSet

private static final Map<CachingNativeMemoryAllocator.AllocationGroup,Boolean> referenceSet

currentAllocator

private static final ThreadLocal<Reference<CachingNativeMemoryAllocator.Allocator>> currentAllocator

Constructor Details

CachingNativeMemoryAllocator

CachingNativeMemoryAllocator()

Method Details

bucketIndex

static int bucketIndex(int size)

allocateAligned

static MemoryIO allocateAligned(Ruby runtime,
 int size,
 int align,
 boolean clear)

Allocates native memory, aligned to a minimum boundary.

Parameters:

runtime - The Ruby runtime

size - The number of bytes to allocate

align - The minimum alignment of the memory

clear - Whether the memory should be cleared (zeroed)

Returns:

A new AllocatedDirectMemoryIO

align

private static long align(long offset,
 long align)

roundUpToPowerOf2

static int roundUpToPowerOf2(int n)

clearMemory

static void clearMemory(long address,
 int size)