org.apache.arrow.memory.netty

Class NettyAllocationManager

java.lang.Object

org.apache.arrow.memory.AllocationManager

org.apache.arrow.memory.netty.NettyAllocationManager

public class NettyAllocationManager
extends AllocationManager

The default implementation of AllocationManager. The implementation is responsible for managing when memory is allocated and returned to the Netty-based PooledByteBufAllocatorL.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.arrow.memory.AllocationManager

AllocationManager.Factory

Field Summary

Fields

Modifier and Type	Field and Description
static int	DEFAULT_ALLOCATION_CUTOFF_VALUE The default cut-off value for switching allocation strategies.
static AllocationManager.Factory	FACTORY

Method Summary

Modifier and Type	Method and Description
long	getSize() Returns the underlying memory chunk size managed.
protected long	memoryAddress() Return the absolute memory address pointing to the fist byte of underlying memory chunk.
protected void	release0() Release the underlying memory chunk.

Methods inherited from class java.lang.Object

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

Field Detail

FACTORY

public static final AllocationManager.Factory FACTORY

DEFAULT_ALLOCATION_CUTOFF_VALUE

public static final int DEFAULT_ALLOCATION_CUTOFF_VALUE

The default cut-off value for switching allocation strategies. If the request size is not greater than the cut-off value, we will allocate memory by PooledByteBufAllocatorL APIs, otherwise, we will use PlatformDependent APIs.

See Also:

Constant Field Values

Method Detail

memoryAddress

protected long memoryAddress()

Description copied from class: AllocationManager

Return the absolute memory address pointing to the fist byte of underlying memory chunk.

Specified by:

memoryAddress in class AllocationManager

release0

protected void release0()

Description copied from class: AllocationManager

Release the underlying memory chunk.

Specified by:

release0 in class AllocationManager

getSize

public long getSize()

Returns the underlying memory chunk size managed.

NettyAllocationManager rounds requested size up to the next power of two.

Specified by:

getSize in class AllocationManager

Returns:

size of underlying memory chunk