2 files changed, 177 insertions, 0 deletions
diff --git a/src/nativewindow/classes/com/jogamp/nativewindow/impl/windows/RegisteredClass.java b/src/nativewindow/classes/com/jogamp/nativewindow/impl/windows/RegisteredClass.java
new file mode 100644
index 000000000..a30a81948
--- /dev/null
+++ b/src/nativewindow/classes/com/jogamp/nativewindow/impl/windows/RegisteredClass.java
@@ -0,0 +1,44 @@
+/**
+ * Copyright 2010 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ *
+ *    2. Redistributions 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+
+package com.jogamp.nativewindow.impl.windows;
+
+public class RegisteredClass {
+    long hInstance;
+    String className;
+
+    RegisteredClass(long hInst, String name) {
+        hInstance = hInst;
+        className = name;
+    }
+
+    public final long getHandle() { return hInstance; }
+    public final String getName() { return className; }
+
+    public final String toString() { return "RegisteredClass[handle 0x"+Long.toHexString(hInstance)+", "+className+"]"; }
+}
diff --git a/src/nativewindow/classes/com/jogamp/nativewindow/impl/windows/RegisteredClassFactory.java b/src/nativewindow/classes/com/jogamp/nativewindow/impl/windows/RegisteredClassFactory.java
new file mode 100644
index 000000000..d04640747
--- /dev/null
+++ b/src/nativewindow/classes/com/jogamp/nativewindow/impl/windows/RegisteredClassFactory.java
@@ -0,0 +1,133 @@
+/**
+ * Copyright 2010 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ *
+ *    2. Redistributions 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+
+package com.jogamp.nativewindow.impl.windows;
+
+import com.jogamp.nativewindow.impl.Debug;
+import java.util.ArrayList;
+import javax.media.nativewindow.NativeWindowException;
+
+public class RegisteredClassFactory {
+    static final boolean DEBUG = Debug.debug("RegisteredClass");
+    private static ArrayList sharedClasses = new ArrayList();
+    private String classBaseName;
+    long wndProc;
+
+    private RegisteredClass sharedClass = null;
+    private int classIter = 0;
+    private int sharedRefCount = 0;
+    private Object sync = new Object();
+
+    /**
+     * Intended for a JVM shutdown hook, hence little synchronization
+     */
+    public static void shutdownSharedClasses() {
+        synchronized(sharedClasses) {
+            for(int i=0; i<sharedClasses.size(); i++) {
+                RegisteredClass sc = (RegisteredClass) sharedClasses.get(i);
+                GDI.DestroyWindowClass(sc.getHandle(), sc.getName());
+                if(DEBUG) {
+                  System.err.println("RegisteredClassFactory shutdownSharedClasses "+i+"/"+sharedClasses.size()+": "+sc);
+                }
+            }
+            sharedClasses.clear();
+        }
+    }
+
+    public RegisteredClassFactory(String classBaseName, long wndProc) {
+        this.classBaseName = classBaseName;
+        this.wndProc = wndProc;
+    }
+
+    public RegisteredClass getSharedClass() throws NativeWindowException {
+      synchronized(sync) {
+          if( 0 == sharedRefCount ) {
+              if( null != sharedClass ) {
+                  throw new InternalError("Error ("+sharedRefCount+"): SharedClass not null: "+sharedClass);
+              }
+              long hInstance = GDI.GetApplicationHandle();
+              if( 0 == hInstance ) {
+                  throw new NativeWindowException("Error: Null ModuleHandle for Application");
+              }
+              String clazzName = null;
+              boolean registered = false;
+              while ( !registered && Integer.MAX_VALUE >= classIter ) {
+                  // Retry with next clazz name, this could happen if more than one JVM is running
+                  clazzName = classBaseName + classIter;
+                  classIter++;
+                  registered = GDI.CreateWindowClass(hInstance, clazzName, wndProc);
+              }
+              if( !registered ) {
+                  throw new NativeWindowException("Error: Could not create WindowClass: "+clazzName);
+              }
+              sharedClass = new RegisteredClass(hInstance, clazzName);
+              synchronized(sharedClasses) {
+                  sharedClasses.add(sharedClass);
+              }
+              if(DEBUG) {
+                  System.err.println("RegisteredClassFactory getSharedClass ("+sharedRefCount+") initialized: "+sharedClass);
+              }
+          } else if ( null == sharedClass ) {
+              throw new InternalError("Error ("+sharedRefCount+"): SharedClass is null");
+          }
+          sharedRefCount++;
+      }
+      return sharedClass;
+    }
+
+    public void releaseSharedClass() {
+      synchronized(sync) {
+          if( 0 == sharedRefCount ) {
+              if( null != sharedClass ) {
+                  throw new InternalError("Error ("+sharedRefCount+"): SharedClass not null: "+sharedClass);
+              }
+              return;
+          }
+          sharedRefCount--;
+          if( null == sharedClass ) {
+              throw new InternalError("Error ("+sharedRefCount+"): SharedClass is null");
+          }
+          if( 0 == sharedRefCount ) {
+              GDI.DestroyWindowClass(sharedClass.getHandle(), sharedClass.getName());
+              synchronized(sharedClasses) {
+                  sharedClasses.remove(sharedClass);
+              }
+              if(DEBUG) {
+                  System.err.println("RegisteredClassFactory releaseSharedClass ("+sharedRefCount+") released: "+sharedClass);
+              }
+              sharedClass = null;
+              sharedRefCount = 0;
+              classIter = 0;
+          }
+      }
+    }
+
+    public int getSharedRefCount() {
+        return sharedRefCount;
+    }
+}