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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;
import java.nio.ByteBuffer;
/** Buffer
*
* @author Mladen Turk
*/
public class Buffer {
/**
* Allocate a new ByteBuffer from memory
* @param size The amount of memory to allocate
* @return The ByteBuffer with allocated memory
*/
public static native ByteBuffer malloc(int size);
/**
* Allocate a new ByteBuffer from memory and set all of the memory to 0
* @param num Number of elements.
* @param size Length in bytes of each element.
* @return The ByteBuffer with allocated memory
*/
public static native ByteBuffer calloc(int num, int size);
/**
* Allocate a new ByteBuffer from a pool
* @param p The pool to allocate from
* @param size The amount of memory to allocate
* @return The ByteBuffer with allocated memory
*/
public static native ByteBuffer palloc(long p, int size);
/**
* Allocate a new ByteBuffer from a pool and set all of the memory to 0
* @param p The pool to allocate from
* @param size The amount of memory to allocate
* @return The ByteBuffer with allocated memory
*/
public static native ByteBuffer pcalloc(long p, int size);
/**
* Allocate a new ByteBuffer from already allocated memory.
* <br>Allocated memory must be provided from call to the
* Stdlib.alloc or Stdlib.calloc methods.
* @param mem The memory to use
* @param size The amount of memory to use
* @return The ByteBuffer with attached memory
*/
public static native ByteBuffer create(long mem, int size);
/**
* Deallocates or frees a memory block used by ByteBuffer
* <br><b>Warning :</b> Call this method only on ByteBuffers
* that were created by calling Buffer.alloc or Buffer.calloc.
* @param buf Previously allocated ByteBuffer to be freed.
*/
public static native void free(ByteBuffer buf);
/**
* Returns the memory address of the ByteBuffer.
* @param buf Previously allocated ByteBuffer.
*/
public static native long address(ByteBuffer buf);
/**
* Returns the allocated memory size of the ByteBuffer.
* @param buf Previously allocated ByteBuffer.
*/
public static native long size(ByteBuffer buf);
}
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