01: /*
02: * gc.java
03: *
04: * Copyright (C) 2003 Peter Graves
05: * $Id: gc.java,v 1.1 2003/10/14 12:47:18 piso Exp $
06: *
07: * This program is free software; you can redistribute it and/or
08: * modify it under the terms of the GNU General Public License
09: * as published by the Free Software Foundation; either version 2
10: * of the License, or (at your option) any later version.
11: *
12: * This program is distributed in the hope that it will be useful,
13: * but WITHOUT ANY WARRANTY; without even the implied warranty of
14: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15: * GNU General Public License for more details.
16: *
17: * You should have received a copy of the GNU General Public License
18: * along with this program; if not, write to the Free Software
19: * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20: */
21:
22: package org.armedbear.lisp;
23:
24: // ### gc
25: public final class gc extends Primitive0 {
26: private gc() {
27: super ("gc", PACKAGE_EXT);
28: }
29:
30: public LispObject execute() {
31: Runtime runtime = Runtime.getRuntime();
32: long free = 0;
33: long maxFree = 0;
34: while (true) {
35: try {
36: runtime.gc();
37: Thread.currentThread().sleep(100);
38: runtime.runFinalization();
39: Thread.currentThread().sleep(100);
40: runtime.gc();
41: Thread.currentThread().sleep(100);
42: } catch (InterruptedException e) {
43: }
44: free = runtime.freeMemory();
45: if (free > maxFree)
46: maxFree = free;
47: else
48: break;
49: }
50: return number(free);
51: }
52:
53: private static final gc GC = new gc();
54: }
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