| /* |
| * Copyright (c) 2010, 2014, 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. |
| */ |
| |
| package jdk.nashorn.internal.runtime; |
| |
| import jdk.nashorn.internal.objects.annotations.SpecializedFunction; |
| import jdk.nashorn.internal.objects.annotations.SpecializedFunction.LinkLogic; |
| |
| /** |
| * This is an interface for classes that need custom linkage logic. This means Native objects |
| * that contain optimistic native methods, that need special/extra rules for linking, guards and |
| * SwitchPointing, known and internal to the Native object for its linkage |
| */ |
| public interface OptimisticBuiltins { |
| |
| /** |
| * Return an instance of the linking logic we need for a particular LinkLogic |
| * subclass, gotten from the compile time annotation of a specialized builtin method |
| * No assumptions can be made about the lifetime of the instance. The receiver may |
| * keep it as a perpetual final instance field or create new linking logic depending |
| * on its current state for each call, depending on if the global state has changed |
| * or other factors |
| * |
| * @param clazz linking logic class |
| * @return linking logic instance for this class |
| */ |
| public SpecializedFunction.LinkLogic getLinkLogic(final Class<? extends LinkLogic> clazz); |
| |
| /** |
| * Does this link logic vary depending on which instance we are working with. |
| * Then we have to sort out certain primitives, as they are created as new |
| * objects in the wrapFilter by JavaScript semantics. An example of instance only |
| * assumptions are switchPoints per instance, as in NativeArray. NativeString is |
| * fine, as it's only static. |
| * |
| * TODO: finer granularity on this, on the function level so certain functions |
| * are forbidden only. Currently we don't have enough specialization to bump into this |
| * |
| * @return true if there are per instance assumptions for the optimism |
| */ |
| public boolean hasPerInstanceAssumptions(); |
| |
| } |