Module org.elasticsearch.nativeaccess

Package org.elasticsearch.nativeaccess.jdk

Class JdkCloseableMappedByteBuffer

java.lang.Object

org.elasticsearch.nativeaccess.jdk.JdkCloseableMappedByteBuffer

All Implemented Interfaces:

AutoCloseable, CloseableByteBuffer, CloseableMappedByteBuffer

Direct Known Subclasses:

PosixCloseableMappedByteBuffer

public class JdkCloseableMappedByteBuffer
extends Object
implements CloseableMappedByteBuffer

Field Summary

Fields

Modifier and Type	Field	Description
protected final MemorySegment	segment

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	JdkCloseableMappedByteBuffer(MemorySegment seg, Arena arena)

Method Summary

Modifier and Type	Method	Description
MappedByteBuffer	buffer()
void	close()
void	madvise(long offset, long length, int advice)	Advises the operating system about the expected access pattern for the specified memory region, allowing the kernel to optimize paging behavior.
static JdkCloseableMappedByteBuffer	ofShared(FileChannel fileChannel, FileChannel.MapMode mode, long position, long size)
void	prefetch(long offset, long length)	Prefetches the given offset and length.
CloseableMappedByteBuffer	slice(long index, long length)	Returns a slice of this buffer.

Methods inherited from class java.lang.Object

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

Field Details

segment

protected final MemorySegment segment

Constructor Details

JdkCloseableMappedByteBuffer

protected JdkCloseableMappedByteBuffer(MemorySegment seg,
 Arena arena)

Method Details

ofShared

public static JdkCloseableMappedByteBuffer ofShared(FileChannel fileChannel,
 FileChannel.MapMode mode,
 long position,
 long size)
                                             throws IOException

Throws:

IOException

buffer

public MappedByteBuffer buffer()

Specified by:

buffer in interface CloseableByteBuffer

close

public void close()

Specified by:

close in interface AutoCloseable

Specified by:

close in interface CloseableByteBuffer

slice

public CloseableMappedByteBuffer slice(long index,
 long length)

Description copied from interface: CloseableMappedByteBuffer

Returns a slice of this buffer. Closing a slice does not close it's parent.

Specified by:

slice in interface CloseableMappedByteBuffer

prefetch

public void prefetch(long offset,
 long length)

Description copied from interface: CloseableMappedByteBuffer

Prefetches the given offset and length.

Specified by:

prefetch in interface CloseableMappedByteBuffer

madvise

public void madvise(long offset,
 long length,
 int advice)

Description copied from interface: CloseableMappedByteBuffer

Advises the operating system about the expected access pattern for the specified memory region, allowing the kernel to optimize paging behavior.

Specified by:

madvise in interface CloseableMappedByteBuffer

Parameters:

offset - the starting offset within the buffer

length - the length of the region in bytes

advice - the access pattern advice; see MadviseAdvice constants