1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
|
/*
* 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();
}
|
