Tomcat example source code file (Mmap.java)

This example Tomcat source code file (Mmap.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Tomcat tags/keywords

apr_mmap_read, apr_mmap_read, apr_mmap_write, apr_mmap_write, error, error, mmap, mmap

The Tomcat Mmap.java source code

/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

package org.apache.tomcat.jni;

/** Mmap
 *
 * @author Mladen Turk
 * @version $Revision: 467222 $, $Date: 2006-10-24 05:17:11 +0200 (mar., 24 oct. 2006) $
 */

public class Mmap {
    /** MMap opened for reading */
    public static final int APR_MMAP_READ  = 1;
    /** MMap opened for writing */
    public static final int APR_MMAP_WRITE = 2;


    /**
     * Create a new mmap'ed file out of an existing APR file.
     * @param file The file turn into an mmap.
     * @param offset The offset into the file to start the data pointer at.
     * @param size The size of the file
     * @param flag bit-wise or of:
     * <PRE>
     * APR_MMAP_READ       MMap opened for reading
     * APR_MMAP_WRITE      MMap opened for writing
     * </PRE>
     * @param pool The pool to use when creating the mmap.
     * @return The newly created mmap'ed file.
     */
    public static native long create(long file, long offset, long size, int flag, long pool)
        throws Error;

    /**
     * Duplicate the specified MMAP.
     * @param mmap The mmap to duplicate.
     * @param pool The pool to use for new_mmap.
     * @return Duplicated mmap'ed file.
     */
    public static native long dup(long mmap, long pool)
        throws Error;

    /**
     * Remove a mmap'ed.
     * @param mm The mmap'ed file.
     */
    public static native int delete(long mm);

    /**
     * Move the pointer into the mmap'ed file to the specified offset.
     * @param mm The mmap'ed file.
     * @param offset The offset to move to.
     * @return The pointer to the offset specified.
     */
    public static native long offset(long mm, long offset)
        throws Error;

}