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java/org/apache/tomcat/jni/Mmap.java

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+/*
+ *  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
+ */
+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.
+     * @throws Error Error creating memory mapping
+     */
+    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.
+     * @throws Error Error duplicating memory mapping
+     */
+    public static native long dup(long mmap, long pool)
+        throws Error;
+
+    /**
+     * Remove a mmap'ed.
+     * @param mm The mmap'ed file.
+     * @return the operation status
+     */
+    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.
+     * @throws Error Error reading file
+     */
+    public static native long offset(long mm, long offset)
+        throws Error;
+
+}