Package org.jctools.util

Class UnsafeLongArrayAccess

java.lang.Object

org.jctools.util.UnsafeLongArrayAccess

public final class UnsafeLongArrayAccess
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static long	LONG_ARRAY_BASE
static int	LONG_ELEMENT_SHIFT

Constructor Summary

Constructors

Constructor	Description
UnsafeLongArrayAccess()

Method Summary

Modifier and Type	Method	Description
static long[]	allocateLongArray(int capacity)	This makes for an easier time generating the atomic queues, and removes some warnings.
static long	calcCircularLongElementOffset(long index, long mask)	Note: circular arrays are assumed a power of 2 in length and the `mask` is (length - 1).
static long	calcLongElementOffset(long index)
static long	lpLongElement(long[] buffer, long offset)	A plain load (no ordering/fences) of an element from a given offset.
static long	lvLongElement(long[] buffer, long offset)	A volatile load of an element from a given offset.
static void	soLongElement(long[] buffer, long offset, long e)	An ordered store of an element to a given offset
static void	spLongElement(long[] buffer, long offset, long e)	A plain store (no ordering/fences) of an element to a given offset

Methods inherited from class java.lang.Object

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

Field Detail

LONG_ARRAY_BASE

public static final long LONG_ARRAY_BASE

LONG_ELEMENT_SHIFT

public static final int LONG_ELEMENT_SHIFT

Constructor Detail

UnsafeLongArrayAccess

public UnsafeLongArrayAccess()

Method Detail

spLongElement

public static void spLongElement(long[] buffer,
                                 long offset,
                                 long e)

A plain store (no ordering/fences) of an element to a given offset

Parameters:

buffer - le buffer

offset - computed via calcLongElementOffset(long)

e - an orderly kitty

soLongElement

public static void soLongElement(long[] buffer,
                                 long offset,
                                 long e)

An ordered store of an element to a given offset

Parameters:

buffer - le buffer

offset - computed via calcCircularLongElementOffset(long, long)

e - an orderly kitty

lpLongElement

public static long lpLongElement(long[] buffer,
                                 long offset)

A plain load (no ordering/fences) of an element from a given offset.

Parameters:

buffer - le buffer

offset - computed via calcLongElementOffset(long)

Returns:

the element at the offset

lvLongElement

public static long lvLongElement(long[] buffer,
                                 long offset)

A volatile load of an element from a given offset.

Parameters:

buffer - le buffer

offset - computed via calcCircularLongElementOffset(long, long)

Returns:

the element at the offset

calcLongElementOffset

public static long calcLongElementOffset(long index)

Parameters:

index - desirable element index

Returns:

the offset in bytes within the array for a given index

calcCircularLongElementOffset

public static long calcCircularLongElementOffset(long index,
                                                 long mask)

Note: circular arrays are assumed a power of 2 in length and the `mask` is (length - 1).

Parameters:

index - desirable element index

mask - (length - 1)

Returns:

the offset in bytes within the circular array for a given index

allocateLongArray

public static long[] allocateLongArray(int capacity)

This makes for an easier time generating the atomic queues, and removes some warnings.