com.alibaba.innodb.java.reader.cli.writer

类 MMapUtil

java.lang.Object

com.alibaba.innodb.java.reader.cli.writer.MMapUtil

public class MMapUtil
extends Object

Utility class which provides a method for attempting to directly unmap a MappedByteBuffer rather than waiting for the JVM and OS eventually unmap.

字段概要

字段

限定符和类型	字段和说明
static boolean	UNMAP_SUPPORTED

方法概要

限定符和类型	方法和说明
static boolean	unmap(MappedByteBuffer theBuffer) Try to unmap the given MappedByteBuffer.

从类继承的方法 java.lang.Object

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

字段详细资料

UNMAP_SUPPORTED

public static final boolean UNMAP_SUPPORTED

方法详细资料

unmap

public static final boolean unmap(MappedByteBuffer theBuffer)

Try to unmap the given MappedByteBuffer. This method enables the workaround for unmapping the buffers from address space after closing IndexInput, that is mentioned in the bug report. This hack may fail on non-Sun JVMs. It forcefully unmaps the buffer on close by using an undocumented internal cleanup functionality.

参数:

theBuffer - buffer

返回:

true if unmap was successful, false if unmap is not supported by the JVM or if there was an exception while trying to unmap.