Module jdk.nio.mapmode

Package jdk.nio.mapmode

Class ExtendedMapMode

java.lang.Object

jdk.nio.mapmode.ExtendedMapMode

public class ExtendedMapMode
extends Object

JDK-specific map modes.

Since:

14

See Also:

• FileChannel.map(java.nio.channels.FileChannel.MapMode, long, long)

Field Summary

Fields

Modifier and Type	Field	Description
static final FileChannel.MapMode	READ_ONLY_SYNC	File mapping mode for a read-only mapping of a file backed by non-volatile RAM.
static final FileChannel.MapMode	READ_WRITE_SYNC	File mapping mode for a read-write mapping of a file backed by non-volatile RAM.

Method Summary

Methods declared in class java.lang.Object

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

Field Details

READ_ONLY_SYNC

public static final FileChannel.MapMode READ_ONLY_SYNC

File mapping mode for a read-only mapping of a file backed by non-volatile RAM.

The map method throws UnsupportedOperationException when this map mode is used on an implementation that does not support it.

Implementation Note:

On Linux, the MAP_SYNC and MAP_SHARED_VALIDATE flags are specified to mmap when mapping the file into memory.

READ_WRITE_SYNC

public static final FileChannel.MapMode READ_WRITE_SYNC

File mapping mode for a read-write mapping of a file backed by non-volatile RAM. force operations on a buffer created with this mode will be performed using cache line writeback rather than proceeding via a file device flush.

The map method throws UnsupportedOperationException when this map mode is used on an implementation that does not support it.

Implementation Note:

On Linux, the MAP_SYNC and MAP_SHARED_VALIDATE flags are specified to mmap when mapping the file into memory.