Added NativeLibrary helper class to com.sun.gluegen.runtime package,

principally to generally solve the problem of downloading dependent
libraries of GlueGen-generated native code, as in the case of JOAL and
OpenAL reported recently by Shawn Kendall on JOAL forums.
Autogenerated Java and native code associated with this new
NativeLibrary helper class is currently checked in to the GlueGen
workspace to make it easier to build across multiple platforms; it can
be regenerated by running the generate.nativelibrary.sources Ant
target in the GlueGen workspace. Building of the native code in the
GlueGen workspace is currently disabled by default and can be enabled
by specifying -Dbuild.native=1 on the ant command line. Use of the new
NativeLibrary class in JOAL is currently disabled by default and can
be enabled by specifying -Djoal.use.gluegen=1 to applications using
JOAL. New functionality has been lightly tested with JOAL on Windows
and appears to be working. More testing, including build and Java Web
Start deployment testing, to follow on other platforms.


git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/../svn-server-sync/gluegen/trunk@37 a78bb65f-1512-4460-ba86-f6dc96a7bf27

1 files changed, 76 insertions, 0 deletions

diff --git a/src/java/com/sun/gluegen/runtime/NativeLibLoader.java b/src/java/com/sun/gluegen/runtime/NativeLibLoader.java
new file mode 100755
index 0000000..4d57867
--- /dev/null
+++ b/src/java/com/sun/gluegen/runtime/NativeLibLoader.java
@@ -0,0 +1,76 @@
+/*
+ * 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.security.*;
+
+/** Class providing control over whether GlueGen loads the native code
+    associated with the NativeLibrary implementation. Alternative app
+    launchers such as those running within applets may want to disable
+    this default loading behavior and load the native code via another
+    (manual) mechanism. */
+public class NativeLibLoader {
+  private static volatile boolean loadingEnabled = true;
+  private static volatile boolean didLoading;
+
+  public static void disableLoading() {
+    loadingEnabled = false;
+  }
+
+  public static void enableLoading() {
+    loadingEnabled = true;
+  }
+  
+  public static void loadGlueGenRT() {
+    if (!didLoading && loadingEnabled) {
+      synchronized (NativeLibLoader.class) {
+        if (!didLoading && loadingEnabled) {
+          didLoading = true;
+          AccessController.doPrivileged(new PrivilegedAction() {
+              public Object run() {
+                System.loadLibrary("gluegen-rt");
+                return null;
+              }
+            });
+        }
+      }
+    }
+  }
+}