Added NativeSignatureEmitter

git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/../svn-server-sync/gluegen/trunk@22 a78bb65f-1512-4460-ba86-f6dc96a7bf27

1 files changed, 115 insertions, 0 deletions

diff --git a/src/java/com/sun/gluegen/runtime/BufferFactoryInternal.java b/src/java/com/sun/gluegen/runtime/BufferFactoryInternal.java
new file mode 100755
index 0000000..7a0e6a8
--- /dev/null
+++ b/src/java/com/sun/gluegen/runtime/BufferFactoryInternal.java
@@ -0,0 +1,115 @@
+/*
+
+ * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * 
+ * - Redistribution of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * 
+ * - Redistribution in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * 
+ * Neither the name of Sun Microsystems, Inc. or the names of
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ * 
+ * This software is provided "AS IS," without a warranty of any kind. ALL
+ * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
+ * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
+ * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
+ * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
+ * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
+ * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
+ * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
+ * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
+ * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
+ * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
+ * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+ * 
+ * You acknowledge that this software is not designed or intended for use
+ * in the design, construction, operation or maintenance of any nuclear
+ * facility.
+ * 
+ * Sun gratefully acknowledges that this software was originally authored
+ * and developed by Kenneth Bradley Russell and Christopher John Kline.
+ */
+
+package com.sun.gluegen.runtime;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Field;
+import java.nio.*;
+import sun.misc.Unsafe;
+
+public class BufferFactoryInternal {
+  private static final long        addressFieldOffset;
+  private static final Constructor directByteBufferConstructor;
+
+  static {
+    try {
+      Field f = Buffer.class.getDeclaredField("address");
+      addressFieldOffset = UnsafeAccess.getUnsafe().objectFieldOffset(f);
+
+      Class directByteBufferClass = Class.forName("java.nio.DirectByteBuffer");
+      directByteBufferConstructor = directByteBufferClass.getDeclaredConstructor(new Class[] { Long.TYPE, Integer.TYPE });
+      directByteBufferConstructor.setAccessible(true);
+    } catch (Exception e) {
+      throw new RuntimeException(e);
+    }
+  }
+
+  public static long getDirectBufferAddress(Buffer buf) {
+    return ((buf == null) ? 0 : UnsafeAccess.getUnsafe().getLong(buf, addressFieldOffset));
+  }
+
+  public static ByteBuffer newDirectByteBuffer(long address, int capacity) {
+    try {
+      if (address == 0) {
+        return null;
+      }
+      return (ByteBuffer) directByteBufferConstructor.newInstance(new Object[] { new Long(address), new Integer(capacity) });
+    } catch (Exception e) {
+      throw new RuntimeException(e);
+    }
+  }
+
+  public static long newCString(String str) {
+    byte[] strBytes = str.getBytes();
+    long   strBlock = UnsafeAccess.getUnsafe().allocateMemory(strBytes.length+1);
+    for (int i = 0; i < strBytes.length; i++) {
+      UnsafeAccess.getUnsafe().putByte(strBlock+i, strBytes[i]);
+    }
+    UnsafeAccess.getUnsafe().putByte(strBlock+strBytes.length, (byte)0); // null termination
+    return strBlock;
+  }
+
+  public static void freeCString(long cStr) {
+    UnsafeAccess.getUnsafe().freeMemory(cStr);
+  }
+
+  public static String newJavaString(long cStr) {
+    if (cStr == 0) {
+      return null;
+    }
+    int numChars = 0;
+    while (UnsafeAccess.getUnsafe().getByte(cStr + numChars) != 0) {
+      ++numChars;
+    }
+    byte[] bytes = new byte[numChars];
+    for (int i = 0; i < numChars; i++) {
+      bytes[i] = UnsafeAccess.getUnsafe().getByte(cStr + i);
+    }
+    return new String(bytes);
+  }
+
+  public static int arrayBaseOffset(Object array) {
+    return UnsafeAccess.getUnsafe().arrayBaseOffset(array.getClass());
+  }
+  public static int arrayIndexScale(Object array) {
+    return UnsafeAccess.getUnsafe().arrayIndexScale(array.getClass());
+  }
+}