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/**
 * Oshi (https://github.com/dblock/oshi)
 * 
 * Copyright (c) 2010 - 2015 The Oshi Project Team
 * 
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 * dblock[at]dblock[dot]org
 * alessandro[at]perucchi[dot]org
 * widdis[at]gmail[dot]com
 * https://github.com/dblock/oshi/graphs/contributors
 */
package oshi.software.os.linux;

import java.util.Arrays;
import java.util.List;

import com.sun.jna.Library;
import com.sun.jna.Native;
import com.sun.jna.NativeLong;
import com.sun.jna.Structure;

public interface Libc extends Library {

	public static final Libc INSTANCE = (Libc) Native.loadLibrary("c",
			Libc.class);

	public static final class Sysinfo extends Structure {
		public NativeLong uptime; // Seconds since boot
		// 1, 5, and 15 minute load averages
		public NativeLong[] loads = new NativeLong[3];
		public NativeLong totalram; // Total usable main memory size
		public NativeLong freeram; // Available memory size
		public NativeLong sharedram; // Amount of shared memory
		public NativeLong bufferram; // Memory used by buffers
		public NativeLong totalswap; // Total swap space size
		public NativeLong freeswap; // swap space still available
		public short procs; // Number of current processes
		public NativeLong totalhigh; // Total high memory size
		public NativeLong freehigh; // Available high memory size
		public int mem_unit; // Memory unit size in bytes
		public byte[] _f = new byte[8]; // Won't be written for 64-bit systems

		@Override
		protected List getFieldOrder() {
			return Arrays.asList(new String[] { "uptime", "loads", "totalram",
					"freeram", "sharedram", "bufferram", "totalswap",
					"freeswap", "procs", "totalhigh", "freehigh", "mem_unit",
					"_f" });
		}
	}

	int sysinfo(Sysinfo info);

}