Package org.jruby.ext.ffi.jffi

Class TransientNativeMemoryIO

java.lang.Object

org.jruby.ext.ffi.MemoryIO

org.jruby.ext.ffi.jffi.BoundedNativeMemoryIO

org.jruby.ext.ffi.jffi.TransientNativeMemoryIO

final class TransientNativeMemoryIO
extends BoundedNativeMemoryIO

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static final class	TransientNativeMemoryIO.Magazine	Holder for a group of memory allocations.

Field Summary

Fields

Modifier and Type	Field	Description
private static final ThreadLocal<Reference<TransientNativeMemoryIO.Magazine>>	currentMagazine
private static final int	PAGES_PER_MAGAZINE
private static final Map<TransientNativeMemoryIO.Magazine,Boolean>	referenceSet	Keeps strong references to the memory bucket until cleanup
private final Object	sentinel

Fields inherited from class org.jruby.ext.ffi.jffi.BoundedNativeMemoryIO

ADDRESS_SIZE, IO, LONG_SIZE, parent, size

Fields inherited from class org.jruby.ext.ffi.MemoryIO

address, isDirect

Constructor Summary

Constructors

Modifier	Constructor	Description
private	TransientNativeMemoryIO(Ruby runtime, Object sentinel, long address, int size)

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.

Methods inherited from class org.jruby.ext.ffi.jffi.BoundedNativeMemoryIO

array, arrayLength, arrayOffset, asByteBuffer, dup, equals, get, get, get, get, get, get, getAddress, getByte, getDouble, getFloat, getInt, getLong, getMemoryIO, getNativeLong, getRuntime, getShort, getZeroTerminatedByteArray, getZeroTerminatedByteArray, hashCode, indexOf, indexOf, order, put, put, put, put, put, put, putAddress, putByte, putDouble, putFloat, putInt, putLong, putMemoryIO, putNativeLong, putShort, putZeroTerminatedByteArray, setMemory, slice, slice

Methods inherited from class org.jruby.ext.ffi.MemoryIO

address, isDirect, isNull

Methods inherited from class java.lang.Object

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

Field Details

referenceSet

private static final Map<TransientNativeMemoryIO.Magazine,Boolean> referenceSet

Keeps strong references to the memory bucket until cleanup

currentMagazine

private static final ThreadLocal<Reference<TransientNativeMemoryIO.Magazine>> currentMagazine

PAGES_PER_MAGAZINE

private static final int PAGES_PER_MAGAZINE

See Also:

• Constant Field Values

sentinel

private final Object sentinel

Constructor Details

TransientNativeMemoryIO

private TransientNativeMemoryIO(Ruby runtime,
 Object sentinel,
 long address,
 int size)

Method Details

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)