1 files changed, 130 insertions, 0 deletions
diff --git a/src/java/com/jogamp/gluegen/runtime/CallbackMap.java b/src/java/com/jogamp/gluegen/runtime/CallbackMap.java
new file mode 100644
index 0000000..518b18b
--- /dev/null
+++ b/src/java/com/jogamp/gluegen/runtime/CallbackMap.java
@@ -0,0 +1,130 @@
+/**
+ * Copyright 2023 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.gluegen.runtime;
+
+import java.lang.reflect.Method;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.concurrent.atomic.AtomicLong;
+
+import com.jogamp.common.JogampRuntimeException;
+import com.jogamp.common.util.HashUtil;
+import com.jogamp.common.util.ReflectionUtil;
+
+public class CallbackMap {
+    public static class NativeUserObj {
+        final long aptr;
+
+        public NativeUserObj(final long userPtr) {
+            this.aptr = userPtr;
+        }
+        @Override
+        public boolean equals(final Object o) {
+            if( this == o ) {
+                return true;
+            }
+            if( !(o instanceof NativeUserObj) ) {
+                return false;
+            }
+            final NativeUserObj o2 = (NativeUserObj)o;
+            return aptr == o2.aptr;
+        }
+        @Override
+        public int hashCode() {
+            return HashUtil.getAddrHash32_EqualDist(aptr);
+        }
+        @Override
+        public String toString() {
+            return "JavaCallback.NativeUserObj[aptr 0x "+Long.toHexString(aptr)+"]";
+        }
+    }
+    public static class Glue {
+        final long userPtr;
+        final Object userObj;
+        final Object callbackObj;
+        final Method callbackMethod;
+
+        public Glue(final long userPtr, final Object userObj, final Object callbackObj, final String methodName, final String[] argTypeNames) {
+            this.userPtr = userPtr;
+            this.userObj = userObj;
+            this.callbackObj = callbackObj;
+            final Class<?>[] argTypes = new Class<?>[argTypeNames.length];
+            for(int i=0; i<argTypeNames.length; ++i) {
+                argTypes[i] = ReflectionUtil.getClass(argTypeNames[i], true, callbackObj.getClass().getClassLoader());
+            }
+            callbackMethod = ReflectionUtil.getMethod(callbackObj.getClass(), methodName, argTypes);
+        }
+        public Object invoke(final Object[] args) {
+            return ReflectionUtil.callMethod(callbackObj, callbackMethod, args);
+        }
+        @Override
+        public boolean equals(final Object o) {
+            if( this == o ) {
+                return true;
+            }
+            if( !(o instanceof Glue) ) {
+                return false;
+            }
+            final Glue o2 = (Glue)o;
+            return userPtr == o2.userPtr;
+        }
+        @Override
+        public int hashCode() {
+            return HashUtil.getAddrHash32_EqualDist(userPtr);
+        }
+        @Override
+        public String toString() {
+            return "JavaCallbackGlue[this 0x"+Long.toHexString(System.identityHashCode(this))+
+                   ", userPtr 0x "+Long.toHexString(userPtr)+", userObj 0x"+Long.toHexString(System.identityHashCode(userObj))+"]";
+        }
+    }
+    private final Map<NativeUserObj, Glue> userToGlue = new HashMap<NativeUserObj, Glue>();
+    final AtomicLong NEXT_ID = new AtomicLong(0);
+
+    public long getNextId() {
+         return NEXT_ID.getAndIncrement();
+    }
+
+    public synchronized Glue getGlue(final NativeUserObj usrObj) {
+        return userToGlue.get(usrObj);
+    }
+    public synchronized Glue putGlue(final NativeUserObj usrObj, final Glue glue) {
+        return userToGlue.put(usrObj, glue);
+    }
+    public synchronized Glue removeGlue(final NativeUserObj usrObj) {
+        return userToGlue.remove(usrObj);
+    }
+
+    public synchronized Object invoke(final long usrPtr, final Object[] args) {
+        final Glue g = getGlue(new NativeUserObj(usrPtr));
+        if( null == g ) {
+            throw new JogampRuntimeException("Could not resolve usrPtr 0x"+Long.toHexString(usrPtr));
+        }
+        return g.invoke(args);
+    }
+}