1 // Copyright 2002 Adam Megacz, see the COPYING file for licensing [GPL]
8 /** common superclass for all platforms that use GCJ to compile a native binary */
9 public abstract class GCJ extends Platform {
11 // static references to these classes ensure that the linker will include them
12 private static Class c1 = gnu.java.locale.Calendar.class;
13 private static Class c2 = java.util.GregorianCalendar.class;
14 private static Class c3 = gnu.gcj.convert.Input_ASCII.class;
15 private static Class c4 = gnu.gcj.convert.Input_UTF8.class;
16 private static Class c5 = gnu.gcj.convert.Input_8859_1.class;
17 private static Class c6 = gnu.java.locale.LocaleInformation.class;
18 private static Class c7 = gnu.gcj.convert.Output_ASCII.class;
19 private static Class c8 = gnu.java.locale.Calendar_en.class;
20 private static Class c9 = gnu.java.locale.Calendar_en_US.class;
22 protected org.xwt.Weak _getWeak(Object o) { return new Java2Weak(o); }
24 private static class Java2Weak extends java.lang.ref.WeakReference implements org.xwt.Weak {
25 public Java2Weak(Object o) { super(o); }
29 protected ImageDecoder _decodeJPEG(InputStream is, String name) {
32 } catch (Exception e) {
33 Log.log(this, "Exception while decoding JPEG image " + name);
39 /** Converts an InputStream carrying a JPEG image into an ARGB int[] */
40 private static class JPEG extends ImageDecoder {
46 public final int[] getData() { return data; }
47 public final int getWidth() { return width; }
48 public final int getHeight() { return height; }
49 private JPEG(InputStream is) { this.is = is; nativeDecompress(); buffer = null; }
50 private native void nativeDecompress();
53 // FIXME: This could be optimized (a lot) by using a custom hashtable
54 public final static class Retainer {
55 private static Hash table = new Hash();
56 private final static class Key {
58 public Key(Object o) { this.o = o; }
59 public int hashCode() { return o == null ? 0 : o.hashCode(); }
60 public boolean equals(Object o2) { return (o2 instanceof Key) && ((Key)o2).o == o; }
62 private final static class Entry {
64 public Entry() { inc(); }
65 public void inc() { refCount++; }
66 public boolean dec() { return --refCount == 0; }
68 public static synchronized void retain(Object o) {
70 Entry r = (Entry) table.get(k);
71 if(r == null) table.put(k,new Entry());
74 public static synchronized void release(Object o) {
76 Entry e = (Entry) table.get(k);
77 if(e == null) throw new Error("Retainer::Release on unknown object");
78 if(e.dec()) { table.remove(k); }