Package org.h2.util

Class MemoryUnmapper

java.lang.Object

org.h2.util.MemoryUnmapper

public final class MemoryUnmapper
extends Object

Unsafe memory unmapper.

See Also:

• SysProperties.NIO_CLEANER_HACK

Method Summary

Modifier and Type	Method	Description
static boolean	unmap(ByteBuffer buffer)	Tries to unmap memory for the specified byte buffer using Java internals in unsafe way if SysProperties.NIO_CLEANER_HACK is enabled and access is not denied by a security manager.

Methods inherited from class java.lang.Object

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

Method Details

unmap

public static boolean unmap(ByteBuffer buffer)

Tries to unmap memory for the specified byte buffer using Java internals in unsafe way if SysProperties.NIO_CLEANER_HACK is enabled and access is not denied by a security manager.

Parameters:

buffer - mapped byte buffer

Returns:

whether operation was successful