--- a/nashorn/src/jdk.scripting.nashorn/share/classes/jdk/internal/dynalink/RelinkableCallSite.java Wed Jul 05 21:04:26 2017 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,178 +0,0 @@
-/*
- * Copyright (c) 2010, 2013, Oracle and/or its affiliates. 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. Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
-
-/*
- * This file is available under and governed by the GNU General Public
- * License version 2 only, as published by the Free Software Foundation.
- * However, the following notice accompanied the original version of this
- * file, and Oracle licenses the original version of this file under the BSD
- * license:
- */
-/*
- Copyright 2009-2013 Attila Szegedi
-
- Licensed under both the Apache License, Version 2.0 (the "Apache License")
- and the BSD License (the "BSD License"), with licensee being free to
- choose either of the two at their discretion.
-
- You may not use this file except in compliance with either the Apache
- License or the BSD License.
-
- If you choose to use this file in compliance with the Apache License, the
- following notice applies to you:
-
- You may obtain a copy of the Apache License at
-
- http://www.apache.org/licenses/LICENSE-2.0
-
- Unless required by applicable law or agreed to in writing, software
- distributed under the License is distributed on an "AS IS" BASIS,
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
- implied. See the License for the specific language governing
- permissions and limitations under the License.
-
- If you choose to use this file in compliance with the BSD License, the
- following notice applies to you:
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions are
- met:
- * Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
- * 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.
- * Neither the name of the copyright holder nor 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 BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT HOLDER
- 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.
-*/
-
-package jdk.internal.dynalink;
-
-import java.lang.invoke.CallSite;
-import java.lang.invoke.MethodHandle;
-import jdk.internal.dynalink.linker.GuardedInvocation;
-import jdk.internal.dynalink.support.ChainedCallSite;
-import jdk.internal.dynalink.support.SimpleRelinkableCallSite;
-
-/**
- * Interface for call sites managed by a {@link DynamicLinker}. Users of
- * Dynalink must use subclasses of {@link CallSite} that also implement this
- * interface as their call site implementations. There is a readily usable
- * {@link SimpleRelinkableCallSite} subclass that implements monomorphic inline
- * caching strategy as well as {@link ChainedCallSite} that implements a
- * polymorphic inline caching strategy and retains a chain of previously linked
- * method handles. A relinkable call site will be managed by a
- * {@link DynamicLinker} object after being associated with it using its
- * {@link DynamicLinker#link(RelinkableCallSite)} method.
- */
-public interface RelinkableCallSite {
- /**
- * Invoked by dynamic linker to initialize the relinkable call site by
- * setting a relink-and-invoke method handle. The call site implementation
- * is supposed to set this method handle as its target using
- * {@link CallSite#setTarget(MethodHandle)}. Relink-and-invoke is the
- * initial method handle set by
- * {@link DynamicLinker#link(RelinkableCallSite)} that will cause the call
- * site to be relinked to an appropriate target on its first invocation
- * based on its arguments, and that linked target will then be invoked
- * (hence the name). This linking protocol effectively delays linking until
- * the call site is invoked with actual arguments and thus ensures that
- * linkers can make nuanced linking decisions based on those arguments and
- * not just on the static method type of the call site.
- * @param relinkAndInvoke a relink-and-invoke method handle supplied by
- * Dynalink.
- */
- public void initialize(MethodHandle relinkAndInvoke);
-
- /**
- * Returns the descriptor for this call site.
- *
- * @return the descriptor for this call site.
- */
- public CallSiteDescriptor getDescriptor();
-
- /**
- * This method will be called by the dynamic linker every time the call site
- * is relinked (but see
- * {@link #resetAndRelink(GuardedInvocation, MethodHandle)} for an
- * exception). It will be passed a {@code GuardedInvocation} that the call
- * site should incorporate into its target method handle. When this method
- * is called, the call site is allowed to keep other non-invalidated
- * invocations around for implementation of polymorphic inline caches and
- * compose them with this invocation to form its final target.
- *
- * @param guardedInvocation the guarded invocation that the call site should
- * incorporate into its target method handle.
- * @param relinkAndInvoke a relink-and-invoke method handle. This is a
- * method handle matching the method type of the call site that is supplied
- * by the {@link DynamicLinker} as a callback. It should be used by this
- * call site as the ultimate fallback when it can't invoke its target with
- * the passed arguments. The fallback method is such that when it's invoked,
- * it'll try to obtain an adequate target {@link GuardedInvocation} for the
- * invocation, and subsequently invoke
- * {@link #relink(GuardedInvocation, MethodHandle)} or
- * {@link #resetAndRelink(GuardedInvocation, MethodHandle)}, and finally
- * invoke the target.
- */
- public void relink(GuardedInvocation guardedInvocation, MethodHandle relinkAndInvoke);
-
- /**
- * This method will be called by the dynamic linker every time the call site
- * is relinked <b>and</b> the linker wishes the call site to throw away any
- * prior linkage state (that is how it differs from
- * {@link #relink(GuardedInvocation, MethodHandle)}). It will be passed a
- * {@code GuardedInvocation} that the call site should use to build its new
- * target method handle. When this method is called, the call site is
- * discouraged from keeping any previous state, and is supposed to only
- * link the current invocation.
- *
- * @param guardedInvocation the guarded invocation that the call site should
- * use to build its target method handle.
- * @param relinkAndInvoke a relink-and-invoke method handle. This is a
- * method handle matching the method type of the call site that is supplied
- * by the {@link DynamicLinker} as a callback. It should be used by this
- * call site as the ultimate fallback when it can't invoke its target with
- * the passed arguments. The fallback method is such that when it's invoked,
- * it'll try to obtain an adequate target {@link GuardedInvocation} for the
- * invocation, and subsequently invoke
- * {@link #relink(GuardedInvocation, MethodHandle)} or
- * {@link #resetAndRelink(GuardedInvocation, MethodHandle)}, and finally
- * invoke the target.
- */
- public void resetAndRelink(GuardedInvocation guardedInvocation, MethodHandle relinkAndInvoke);
-}