net.dongliu.direct.memory.slabs

类 SlabsAllocator

java.lang.Object

net.dongliu.direct.memory.slabs.SlabsAllocator

所有已实现的接口:

Allocator

public class SlabsAllocator
extends Object
implements Allocator

Memory Allocator use slabList, as memcached. TODO: slab rebalance.

作者:

dongliu

字段概要

字段

限定符和类型	字段和说明
protected AtomicLong	actualUsed offheap memory size had been actualUsed.
protected long	capacity
protected int[]	CHUNK_SIZE_LIST
protected int	chunkSize minim size of chunk
protected int	slabSize it is also the max Chunk Size
protected AtomicLong	used

构造器概要

构造器

构造器和说明
SlabsAllocator(long capacity, float expandFactor, int chunkSize, int slabSize)

方法概要

限定符和类型	方法和说明
long	actualUsed() the memory size actualUsed.
MemoryBuffer	allocate(int size) allocate memory buf.
void	destroy() destroy allocator, dispose all resources.
long	getCapacity() the capacity
long	used()

从类继承的方法 java.lang.Object

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

字段详细资料

chunkSize

protected final int chunkSize

minim size of chunk

slabSize

protected final int slabSize

it is also the max Chunk Size

CHUNK_SIZE_LIST

protected final int[] CHUNK_SIZE_LIST

capacity

protected final long capacity

used

protected final AtomicLong used

actualUsed

protected final AtomicLong actualUsed

offheap memory size had been actualUsed.

构造器详细资料

SlabsAllocator

public SlabsAllocator(long capacity,
                      float expandFactor,
                      int chunkSize,
                      int slabSize)

方法详细资料

allocate

public MemoryBuffer allocate(int size)

从接口复制的说明: Allocator

allocate memory buf.

指定者:

allocate 在接口中 Allocator

返回:

the buf allocated. null if cannot allocate memory due to not enough free memory.

getCapacity

public long getCapacity()

从接口复制的说明: Allocator

the capacity

指定者:

getCapacity 在接口中 Allocator

返回:

actualUsed

public long actualUsed()

从接口复制的说明: Allocator

the memory size actualUsed.

指定者:

actualUsed 在接口中 Allocator

返回:

used

public long used()

指定者:

used 在接口中 Allocator

destroy

public void destroy()

从接口复制的说明: Allocator

destroy allocator, dispose all resources. after destroy this cannot be actualUsed any more

指定者:

destroy 在接口中 Allocator