/* * 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() {} }