/*

  This Source Code Form is subject to the terms of the Mozilla Public

  License, v. 2.0. If a copy of the MPL was not distributed with this

  file, You can obtain one at http://mozilla.org/MPL/2.0/.

  Copyright (C) 2012 Michael Möller <mmoeller@openhardwaremonitor.org>

*/

using System;

using System.Diagnostics;

using System.Runtime.InteropServices;

namespace OpenHardwareMonitor.Hardware {

  internal static class OperatingSystem {

    public static bool Is64BitOperatingSystem() {

      if (IntPtr.Size == 8)

        return true;

      try {

        bool wow64Process;

        bool result = IsWow64Process(

          Process.GetCurrentProcess().Handle, out wow64Process);

        return result && wow64Process;

      } catch (EntryPointNotFoundException) {

        return false;

      }

    }

    [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]

    [return: MarshalAs(UnmanagedType.Bool)]

    private static extern bool IsWow64Process(IntPtr hProcess,

      out bool wow64Process);

  }

}