001/* 002 * BridJ - Dynamic and blazing-fast native interop for Java. 003 * http://bridj.googlecode.com/ 004 * 005 * Copyright (c) 2010-2013, Olivier Chafik (http://ochafik.com/) 006 * All rights reserved. 007 * 008 * Redistribution and use in source and binary forms, with or without 009 * modification, are permitted provided that the following conditions are met: 010 * 011 * * Redistributions of source code must retain the above copyright 012 * notice, this list of conditions and the following disclaimer. 013 * * Redistributions in binary form must reproduce the above copyright 014 * notice, this list of conditions and the following disclaimer in the 015 * documentation and/or other materials provided with the distribution. 016 * * Neither the name of Olivier Chafik nor the 017 * names of its contributors may be used to endorse or promote products 018 * derived from this software without specific prior written permission. 019 * 020 * THIS SOFTWARE IS PROVIDED BY OLIVIER CHAFIK AND CONTRIBUTORS ``AS IS'' AND ANY 021 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 022 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 023 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS BE LIABLE FOR ANY 024 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 025 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 026 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 027 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 028 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 029 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 030 */ 031package org.bridj.util; 032 033import org.bridj.ann.Library; 034import java.io.File; 035import java.io.IOException; 036import java.util.ArrayList; 037import java.util.List; 038 039import org.bridj.BridJ; 040import org.bridj.Platform; 041import org.bridj.ann.Convention; 042import static java.lang.System.getProperty; 043 044/** 045 * Util methods to : query the process id from the current process, launch 046 * processes (including JVM processes) 047 * 048 * @author Olivier 049 */ 050public class ProcessUtils { 051 052 @Library("kernel32") 053 @Convention(Convention.Style.StdCall) 054 static class Kernel32 { 055 056 public static native int GetCurrentProcessId(); 057 } 058 059 @Library("c") 060 static class LibC { 061 062 public static native int getpid(); 063 } 064 065 /** 066 * Get the current process native id 067 */ 068 public static int getCurrentProcessId() { 069 if (Platform.isWindows()) { 070 BridJ.register(Kernel32.class); 071 return Kernel32.GetCurrentProcessId(); 072 } else { 073 BridJ.register(LibC.class); 074 return LibC.getpid(); 075 } 076 } 077 078 public static String[] computeJavaProcessArgs(Class<?> mainClass, List<?> mainArgs) { 079 List<String> args = new ArrayList<String>(); 080 args.add(new File(new File(getProperty("java.home")), "bin" + File.separator + "java").toString()); 081 args.add("-cp"); 082 args.add(getProperty("java.class.path")); 083 args.add(mainClass.getName()); 084 for (Object arg : mainArgs) { 085 args.add(arg.toString()); 086 } 087 088 return args.toArray(new String[args.size()]); 089 } 090 091 public static Process startJavaProcess(Class<?> mainClass, List<?> mainArgs) throws IOException { 092 ProcessBuilder b = new ProcessBuilder(); 093 b.command(computeJavaProcessArgs(mainClass, mainArgs)); 094 b.redirectErrorStream(true); 095 return b.start(); 096 } 097}