CLibrary.java

/*
 * 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.cassandra.utils;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.sun.jna.Native;

public final class CLibrary
{
    private static Logger logger = LoggerFactory.getLogger(CLibrary.class);

    public static final int MCL_CURRENT = 1;
    public static final int MCL_FUTURE = 2;
    
    public static final int ENOMEM = 12;

    static
    {
        try
        {
            Native.register("c");
        }
        catch (NoClassDefFoundError e)
        {
            logger.info("JNA not found. Native methods will be disabled.");
        }
        catch (UnsatisfiedLinkError e)
        {
            logger.info("Unable to link C library. Native methods will be disabled.");
        }
    }

    public static native int mlockall(int flags);

    public static native int munlockall();

    private CLibrary() {}
}