Package org.apache.cassandra.cache

Class RefCountedMemory

java.lang.Object

org.apache.cassandra.io.util.Memory

org.apache.cassandra.cache.RefCountedMemory

All Implemented Interfaces:

AutoCloseable, ReadableMemory

public class RefCountedMemory
extends Memory
implements AutoCloseable

Field Summary

Fields inherited from class org.apache.cassandra.io.util.Memory

NO_BYTE_BUFFERS, peer, size

Constructor Summary

Constructors

Constructor	Description
RefCountedMemory(long size)

Method Summary

Modifier and Type	Method	Description
void	close()
RefCountedMemory	copy(long newSize)
void	free()
boolean	reference()
void	unreference()	decrement reference count.

Methods inherited from class org.apache.cassandra.io.util.Memory

allocate, asByteBuffer, asByteBuffers, checkBounds, equals, getByte, getBytes, getInt, getLong, put, setByte, setByteBuffer, setBytes, setBytes, setInt, setLong, setMemory, size, toString, toString

Methods inherited from class java.lang.Object

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

Constructor Details

RefCountedMemory

public RefCountedMemory(long size)

Method Details

reference

public boolean reference()

Returns:

true if we succeed in referencing before the reference count reaches zero. (A FreeableMemory object is created with a reference count of one.)

unreference

public void unreference()

decrement reference count. if count reaches zero, the object is freed.

copy

public RefCountedMemory copy(long newSize)

Overrides:

copy in class Memory

free

public void free()

Overrides:

free in class Memory

close

public void close()

Specified by:

close in interface AutoCloseable

Overrides:

close in class Memory