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BEGIN LICENSE BLOCK ***** Version: EPL 1.0/GPL 2.0/LGPL 2.1 Copyright (C) 2007-2011 JRuby Team <> The contents of this file are subject to the Eclipse Public License Version 1.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at Software distributed under the License is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the specific language governing rights and limitations under the License. Alternatively, the contents of this file may be used under the terms of either of the GNU General Public License Version 2 or later (the "GPL"), or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), in which case the provisions of the GPL or the LGPL are applicable instead of those above. If you wish to allow use of your version of this file only under the terms of either the GPL or the LGPL, and not to allow others to use your version of this file under the terms of the EPL, indicate your decision by deleting the provisions above and replace them with the notice and other provisions required by the GPL or the LGPL. If you do not delete the provisions above, a recipient may use your version of this file under the terms of any one of the EPL, the GPL or the LGPL. END LICENSE BLOCK ***
package org.jruby.util;
import jnr.ffi.*;
A binding of a few key win32 functions we need to behave properly.
public class WindowsFFI {
    public static interface Kernel32 {
        public static final int PROCESS_QUERY_INFORMATION  = 0x0400;
        public static final int ERROR_INVALID_PARAMETER = 0x57;
        public static final int PROCESS_TERMINATE  = 0x0001;
        public static final int STILL_ACTIVE = 259;
        int GetProcessId(@intptr_t long handle);
        jnr.ffi.Pointer OpenProcess(int dwDesiredAccessint bInheritHandleint dwProcessId);
        int CloseHandle(jnr.ffi.Pointer handle);
        int GetLastError();
        int GetExitCodeProcess(jnr.ffi.Pointer hProcess, @Out IntByReference pointerToExitCodeDword);
        int TerminateProcess(jnr.ffi.Pointer hProcessint uExitCode);
    private static final class SingletonHolder {
        static final Kernel32 Kernel32 = LibraryLoader.create(Kernel32.class)
    public static Kernel32 getKernel32() {
        return kernel32();
    public static Kernel32 kernel32() {
        return .;
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