org.openjdk.jol.datamodel

Interface DataModel

All Known Implementing Classes:

Model32, Model64, Model64_CCPS, Model64_COOPS_CCPS, ModelVM

public interface DataModel

Describes the data model, notably, the basic types sizes.

Author:

Aleksey Shipilev

Method Summary

Modifier and Type	Method and Description
int	arrayHeaderSize() Return the array header size.
int	arrayLengthHeaderSize() Return the array length header size.
int	classHeaderSize() Return the class header size.
int	headerSize() Return the object header size.
int	markHeaderSize() Return the mark header size.
int	objectAlignment() Return the object alignment.
int	sizeOf(String klass) Return the size of the type.

Method Detail

markHeaderSize

int markHeaderSize()

Return the mark header size.

Returns:

mark header size in bytes.

classHeaderSize

int classHeaderSize()

Return the class header size.

Returns:

class header size in bytes.

arrayLengthHeaderSize

int arrayLengthHeaderSize()

Return the array length header size.

Returns:

array length header size in bytes.

headerSize

int headerSize()

Return the object header size.

Returns:

object header size in bytes.

arrayHeaderSize

int arrayHeaderSize()

Return the array header size.

Returns:

object header size in bytes.

sizeOf

int sizeOf(String klass)

Return the size of the type.

Parameters:

klass - string representation of the type.

Returns:

size in bytes.

objectAlignment

int objectAlignment()

Return the object alignment.

Returns:

minimal object alignment