org.jikesrvm.util

Class AddressInputStream

java.lang.Object

java.io.InputStream

org.jikesrvm.util.AddressInputStream

All Implemented Interfaces:

Closeable, AutoCloseable

public final class AddressInputStream
extends InputStream

Access raw memory region as an input stream.

Field Summary

Fields

Modifier and Type	Field and Description
private Extent	length Length of the memory region
private Extent	markOffset Mark offset.
private Extent	offset Offset to be read.
private Address	startAddress Start address of memory region to be read

Constructor Summary

Constructors

Constructor and Description
AddressInputStream(Address startAddress, Extent length)

Method Summary

Modifier and Type	Method and Description
int	available()
void	close() Closing an AddressInputStream has no effect.
void	mark(int readLimit) Marks location.
boolean	markSupported() Is mark/reset supported
int	read() Reads a byte
void	reset() Resets to mark
long	skip(long n) Skips bytes (at most @code{Integer.MAX_VALUE} bytes)

Methods inherited from class java.io.InputStream

read, read

Methods inherited from class java.lang.Object

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

Field Detail

startAddress

private final Address startAddress

Start address of memory region to be read

length

private final Extent length

Length of the memory region

offset

private Extent offset

Offset to be read. Uses an Extent because the offset is always non-negative.

markOffset

private Extent markOffset

Mark offset. Uses an Extent because the offset is always non-negative.

Constructor Detail

AddressInputStream

public AddressInputStream(Address startAddress,
                          Extent length)

Parameters:

startAddress - start address of the memory region

length - length of the region in bytes

Method Detail

available

public int available()

Overrides:

available in class InputStream

Returns:

number of bytes that can be read

close

public void close()
           throws IOException

Closing an AddressInputStream has no effect.

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Overrides:

close in class InputStream

Throws:

IOException

mark

public void mark(int readLimit)

Marks location. Read limit has no effect.

Overrides:

mark in class InputStream

markSupported

public boolean markSupported()

Is mark/reset supported

Overrides:

markSupported in class InputStream

read

public int read()

Reads a byte

Specified by:

read in class InputStream

reset

public void reset()

Resets to mark

Overrides:

reset in class InputStream

skip

public long skip(long n)

Skips bytes (at most @code{Integer.MAX_VALUE} bytes)

Overrides:

skip in class InputStream