timerdoclet.java

linux下建立JAVA虚拟机的源码KAFFE

/* gnu.classpath.tools.gjdoc.TimerDoclet
   Copyright (C) 2001 Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
 
GNU Classpath is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Classpath; see the file COPYING.  If not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */

package gnu.classpath.tools.gjdoc;

import com.sun.javadoc.*;

public class TimerDoclet {

   private static Object doclet = null;

   private static long maximumHeap = -1;
   
   private static Thread memThread;

   private static boolean runMemThread = true;

   private static void init() throws Exception {
      if (doclet==null) {
	 doclet=Class.forName("com.sun.tools.doclets.standard.Standard").newInstance();
	 memThread=new Thread() {
	       
	       public void run() {
		  while (runMemThread) {
		     synchronized (TimerDoclet.class) {
			TimerDoclet.maximumHeap=Math.max(TimerDoclet.maximumHeap,
							 Runtime.getRuntime().totalMemory()-Runtime.getRuntime().freeMemory());
		     }
		     try { Thread.sleep(50); } catch (Exception e) {}
		  }
	       }
	    };
	 //memThread.start();
      }
   }

   public static boolean validOptions(String[][] options, DocErrorReporter reporter)  
      throws Exception {

      init();
      return ((Boolean)doclet.getClass().getMethod("validOptions", new Class[]{String[][].class, DocErrorReporter.class}).invoke(null, new Object[]{options, reporter})).booleanValue();
      //return false; //doclet.validOptions(options, reporter);
   }

   public static int optionLength(String option) throws Exception {
      init();
      return ((Integer)doclet.getClass().getMethod("optionLength", new Class[]{String.class}).invoke(null, new Object[]{option})).intValue();
   }

   public static boolean start(RootDoc root) throws Exception {
      Timer.setBeforeDocletTime();
      synchronized (TimerDoclet.class) {
	 Timer.setMaxDriverHeap(maximumHeap);
	 maximumHeap=-1;
      }
      //new com.sun.tools.doclets.standard.Standard().validOptions(root.options(), root);
      //new com.sun.tools.doclets.standard.Standard().start(root);
      
      if (validOptions(root.options(), root)) {
	 doclet.getClass().getMethod("start", new Class[]{RootDoc.class}).invoke(null, new Object[]{root});
      }
      runMemThread=false;
      Timer.setStopTime();
      synchronized (TimerDoclet.class) {
	 Timer.setMaxDocletHeap(maximumHeap);
      }
      Timer.shutdown();
      return true;
   }
}