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/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
package org.elasticsearch.bootstrap;
import com.sun.jna.Native;
import com.sun.jna.NativeLong;
import com.sun.jna.Structure;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.lucene.util.Constants;
import java.util.Arrays;
import java.util.List;
/**
* java mapping to some libc functions
*/
final class JNACLibrary {
private static final Logger logger = LogManager.getLogger(JNACLibrary.class);
public static final int MCL_CURRENT = 1;
public static final int ENOMEM = 12;
public static final int RLIMIT_MEMLOCK = Constants.MAC_OS_X ? 6 : 8;
public static final int RLIMIT_AS = Constants.MAC_OS_X ? 5 : 9;
public static final int RLIMIT_FSIZE = Constants.MAC_OS_X ? 1 : 1;
public static final long RLIM_INFINITY = Constants.MAC_OS_X ? 9223372036854775807L : -1L;
static {
try {
Native.register("c");
} catch (UnsatisfiedLinkError e) {
logger.warn("unable to link C library. native methods (mlockall) will be disabled.", e);
}
}
static native int mlockall(int flags);
static native int geteuid();
/** corresponds to struct rlimit */
public static final class Rlimit extends Structure implements Structure.ByReference {
public NativeLong rlim_cur = new NativeLong(0);
public NativeLong rlim_max = new NativeLong(0);
@Override
protected List getFieldOrder() {
return Arrays.asList("rlim_cur", "rlim_max");
}
}
static native int getrlimit(int resource, Rlimit rlimit);
static native int setrlimit(int resource, Rlimit rlimit);
static native String strerror(int errno);
private JNACLibrary() {}
}