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 and Description
private static class	TransientNativeMemoryIO.Magazine Holder for a group of memory allocations.

Field Summary

Fields

Modifier and Type	Field and Description
private static java.lang.ThreadLocal<java.lang.ref.Reference<TransientNativeMemoryIO.Magazine>>	currentMagazine
private static int	PAGES_PER_MAGAZINE
private static java.util.Map<TransientNativeMemoryIO.Magazine,java.lang.Boolean>	referenceSet Keeps strong references to the memory bucket until cleanup
private java.lang.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 and Description
private	TransientNativeMemoryIO(Ruby runtime, java.lang.Object sentinel, long address, int size)

Method Summary

Modifier and Type	Method and 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 Detail

referenceSet

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

Keeps strong references to the memory bucket until cleanup

currentMagazine

private static final java.lang.ThreadLocal<java.lang.ref.Reference<TransientNativeMemoryIO.Magazine>> currentMagazine

PAGES_PER_MAGAZINE

private static final int PAGES_PER_MAGAZINE

See Also:

Constant Field Values

sentinel

private final java.lang.Object sentinel

Constructor Detail

TransientNativeMemoryIO

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

Method Detail

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)