cn.amorou.uid.utils

类 PaddedAtomicLong

java.lang.Object

java.lang.Number

java.util.concurrent.atomic.AtomicLong

cn.amorou.uid.utils.PaddedAtomicLong

所有已实现的接口:

Serializable

public class PaddedAtomicLong
extends AtomicLong

Represents a padded AtomicLong to prevent the FalseSharing problem

The CPU cache line commonly be 64 bytes, here is a sample of cache line after padding:
64 bytes = 8 bytes (object reference) + 6 * 8 bytes (padded long) + 8 bytes (a long value)

作者:

yutianbao

另请参阅:

序列化表格

字段概要

字段

限定符和类型	字段和说明
long	p1 Padded 6 long (48 bytes)
long	p2 Padded 6 long (48 bytes)
long	p3 Padded 6 long (48 bytes)
long	p4 Padded 6 long (48 bytes)
long	p5 Padded 6 long (48 bytes)
long	p6 Padded 6 long (48 bytes)

构造器概要

构造器

构造器和说明
PaddedAtomicLong() Constructors from AtomicLong
PaddedAtomicLong(long initialValue)

方法概要

限定符和类型	方法和说明
long	sumPaddingToPreventOptimization() To prevent GC optimizations for cleaning unused padded references

从类继承的方法 java.util.concurrent.atomic.AtomicLong

accumulateAndGet, addAndGet, compareAndSet, decrementAndGet, doubleValue, floatValue, get, getAndAccumulate, getAndAdd, getAndDecrement, getAndIncrement, getAndSet, getAndUpdate, incrementAndGet, intValue, lazySet, longValue, set, toString, updateAndGet, weakCompareAndSet

从类继承的方法 java.lang.Number

byteValue, shortValue

从类继承的方法 java.lang.Object

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

字段详细资料

p1

public volatile long p1

Padded 6 long (48 bytes)

p2

public volatile long p2

Padded 6 long (48 bytes)

p3

public volatile long p3

Padded 6 long (48 bytes)

p4

public volatile long p4

Padded 6 long (48 bytes)

p5

public volatile long p5

Padded 6 long (48 bytes)

p6

public volatile long p6

Padded 6 long (48 bytes)

构造器详细资料

PaddedAtomicLong

public PaddedAtomicLong()

Constructors from AtomicLong

PaddedAtomicLong

public PaddedAtomicLong(long initialValue)

方法详细资料

sumPaddingToPreventOptimization

public long sumPaddingToPreventOptimization()

To prevent GC optimizations for cleaning unused padded references