Package org.apache.tomcat.jni

Class Mmap

java.lang.Object

org.apache.tomcat.jni.Mmap

public class Mmap
extends java.lang.Object

Mmap

Author:

Mladen Turk

Field Summary

Fields

Modifier and Type	Field	Description
static int	APR_MMAP_READ	MMap opened for reading
static int	APR_MMAP_WRITE	MMap opened for writing

Constructor Summary

Constructors

Constructor	Description
Mmap()

Method Summary

Modifier and Type	Method	Description
static long	create(long file, long offset, long size, int flag, long pool)	Create a new mmap'ed file out of an existing APR file.
static int	delete(long mm)	Remove a mmap'ed.
static long	dup(long mmap, long pool)	Duplicate the specified MMAP.
static long	offset(long mm, long offset)	Move the pointer into the mmap'ed file to the specified offset.

Methods inherited from class java.lang.Object

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

Field Detail

APR_MMAP_READ

public static final int APR_MMAP_READ

MMap opened for reading

See Also:

Constant Field Values

APR_MMAP_WRITE

public static final int APR_MMAP_WRITE

MMap opened for writing

See Also:

Constant Field Values

Constructor Detail

Mmap

public Mmap()

Method Detail

create

public static long create(long file,
                          long offset,
                          long size,
                          int flag,
                          long pool)
                   throws Error

Create a new mmap'ed file out of an existing APR file.

Parameters:

file - The file turn into an mmap.

offset - The offset into the file to start the data pointer at.

size - The size of the file

flag - bit-wise or of:

 APR_MMAP_READ       MMap opened for reading
 APR_MMAP_WRITE      MMap opened for writing
 

pool - The pool to use when creating the mmap.

Returns:

The newly created mmap'ed file.

Throws:

Error - Error creating memory mapping

dup

public static long dup(long mmap,
                       long pool)
                throws Error

Duplicate the specified MMAP.

Parameters:

mmap - The mmap to duplicate.

pool - The pool to use for new_mmap.

Returns:

Duplicated mmap'ed file.

Throws:

Error - Error duplicating memory mapping

delete

public static int delete(long mm)

Remove a mmap'ed.

Parameters:

mm - The mmap'ed file.

Returns:

the operation status

offset

public static long offset(long mm,
                          long offset)
                   throws Error

Move the pointer into the mmap'ed file to the specified offset.

Parameters:

mm - The mmap'ed file.

offset - The offset to move to.

Returns:

The pointer to the offset specified.

Throws:

Error - Error reading file