1 duncan 1.1.2.5 // InterpreterCachingCodeFactory.java, created Sun May 9 20:01:15 1999 by duncan
2 duncan 1.1.2.5 // Copyright (C) 1999 Duncan Bryce <duncan@lcs.mit.edu>
3 duncan 1.1.2.1 // Licensed under the terms of the GNU GPL; see COPYING for details.
4 duncan 1.1.2.1 package harpoon.Interpret.Tree;
5 duncan 1.1.2.1
6 duncan 1.1.2.1 import harpoon.ClassFile.CachingCodeFactory;
7 duncan 1.1.2.1 import harpoon.ClassFile.HCode;
8 duncan 1.1.2.1 import harpoon.ClassFile.HCodeFactory;
9 duncan 1.1.2.1 import harpoon.ClassFile.HMethod;
10 duncan 1.1.2.1
11 duncan 1.1.2.1
12 duncan 1.1.2.5 /**
13 duncan 1.1.2.5 * A code factory designed specifically for use by the Tree
14 duncan 1.1.2.5 * interpreter. Probably shouldn't be used for anything else.
15 duncan 1.1.2.5 * The main feature of the <code>InterpreterCachingCodeFactory</code> class
16 duncan 1.1.2.5 * is that its <code>convert()</code> chooses between 2 code factories
17 duncan 1.1.2.5 * based on which method it is converting. For class initializers,
18 duncan 1.1.2.5 * it uses a non-caching, non-optimizing codefactory to save memory.
19 duncan 1.1.2.5 * For all other methods, it uses a caching, optimizing code factory.
20 duncan 1.1.2.5 *
21 cananian 1.1.2.6 * @author Duncan Bryce <duncan@lcs.mit.edu>
22 cananian 1.2 * @version $Id: InterpreterCachingCodeFactory.java,v 1.2 2002/02/25 21:05:57 cananian Exp $
23 duncan 1.1.2.1 */
24 duncan 1.1.2.5 class InterpreterCachingCodeFactory implements HCodeFactory {
25 duncan 1.1.2.2 private HCodeFactory factory;
26 duncan 1.1.2.2 private HCodeFactory optimizingFactory;
27 duncan 1.1.2.2
28 duncan 1.1.2.2 public InterpreterCachingCodeFactory
29 duncan 1.1.2.2 (HCodeFactory factory, HCodeFactory optimizingFactory) {
30 duncan 1.1.2.2 this.factory = factory;
31 duncan 1.1.2.2 this.optimizingFactory = new CachingCodeFactory(optimizingFactory);
32 duncan 1.1.2.1 }
33 duncan 1.1.2.1
34 duncan 1.1.2.5 /** Convert a method to an <code>HCode</code>. If the method is
35 duncan 1.1.2.5 * a class initializer, it is neither optimized, nor cached.
36 duncan 1.1.2.5 * However, all other methods are both optimized (by this class's
37 duncan 1.1.2.5 * optimizing code factory) and cached.
38 duncan 1.1.2.5 */
39 duncan 1.1.2.1 public HCode convert(HMethod m) {
40 duncan 1.1.2.1 HCode hc;
41 duncan 1.1.2.1
42 duncan 1.1.2.1 if (m.getName().equals("<clinit>"))
43 duncan 1.1.2.2 hc = factory.convert(m);
44 duncan 1.1.2.1 else
45 duncan 1.1.2.2 hc = optimizingFactory.convert(m);
46 duncan 1.1.2.1
47 duncan 1.1.2.1 return hc;
48 duncan 1.1.2.2 }
49 duncan 1.1.2.2
50 duncan 1.1.2.2 public String getCodeName() { return optimizingFactory.getCodeName(); }
51 duncan 1.1.2.2
52 duncan 1.1.2.5 public void clear(HMethod m) { this.optimizingFactory.clear(m); }
53 cananian 1.2 }