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package jdk.nio.mapmode;

import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;
import java.nio.channels.FileChannel.MapMode;

JDK-specific map modes.
See Also:
Since:14
/** * JDK-specific map modes. * * @since 14 * @see java.nio.channels.FileChannel#map */
public class ExtendedMapMode { private ExtendedMapMode() { }
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.
/** * File mapping mode for a read-only mapping of a file backed by * non-volatile RAM. * * <p> The {@linkplain FileChannel#map map} method throws * {@linkplain UnsupportedOperationException} when this map mode * is used on an implementation that does not support it. * * @implNote On Linux, the {@code MAP_SYNC} and {@code * MAP_SHARED_VALIDATE} flags are specified to {@code mmap} when * mapping the file into memory. */
public static final MapMode READ_ONLY_SYNC = jdk.internal.misc.ExtendedMapMode.READ_ONLY_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.
/** * File mapping mode for a read-write mapping of a file backed by * non-volatile RAM. {@linkplain MappedByteBuffer#force force} * operations on a buffer created with this mode will be performed * using cache line writeback rather than proceeding via a file * device flush. * * <p> The {@linkplain FileChannel#map map} method throws * {@linkplain UnsupportedOperationException} when this map mode * is used on an implementation that does not support it. * * @implNote On Linux, the {@code MAP_SYNC} and {@code * MAP_SHARED_VALIDATE} flags are specified to {@code mmap} when * mapping the file into memory. */
public static final MapMode READ_WRITE_SYNC = jdk.internal.misc.ExtendedMapMode.READ_WRITE_SYNC; }