--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/sun/dyn/CallSiteImpl.java	Tue May 05 22:40:09 2009 -0700
@@ -0,0 +1,70 @@
+/*
+ * Copyright 2008-2009 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package sun.dyn;
+
+import java.dyn.*;
+
+/**
+ * The CallSite privately created by the JVM at every invokedynamic instruction.
+ * @author jrose
+ */
+class CallSiteImpl extends CallSite {
+    // Fields used only by the JVM.  Do not use or change.
+    private Object vmmethod;
+
+    // Values supplied by the JVM:
+    int callerMID, callerBCI;
+
+    private CallSiteImpl(Class<?> caller, String name, MethodType type) {
+        super(caller, name, type);
+    }
+
+    @Override
+    public void setTarget(MethodHandle mh) {
+        checkTarget(mh);
+        if (MethodHandleNatives.JVM_SUPPORT)
+            MethodHandleNatives.linkCallSite(this, (MethodHandle) mh);
+        else
+            super.setTarget(mh);
+    }
+
+    private static final MethodHandle PRIVATE_INITIALIZE_CALL_SITE =
+            MethodHandleImpl.IMPL_LOOKUP.findStatic(CallSite.class, "privateInitializeCallSite",
+                MethodType.make(void.class, CallSite.class, int.class, int.class));
+
+    // this is the up-call from the JVM:
+    static CallSite makeSite(Class<?> caller, String name, MethodType type,
+                             int callerMID, int callerBCI) {
+        MethodHandle bsm = Linkage.getBootstrapMethod(caller);
+        if (bsm == null)
+            throw new InvokeDynamicBootstrapError("class has no bootstrap method: "+caller);
+        CallSite site = bsm.<CallSite>invoke(caller, name, type);
+        if (site == null)
+            throw new InvokeDynamicBootstrapError("class bootstrap method failed to create a call site: "+caller);
+        PRIVATE_INITIALIZE_CALL_SITE.<void>invoke(site, callerMID, callerBCI);
+        return site;
+    }
+}