1/*
2 * Copyright (C) 2008, 2009 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
14 * its contributors may be used to endorse or promote products derived
15 * from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#ifndef JSActivation_h
30#define JSActivation_h
31
32#include "CodeBlock.h"
33#include "JSVariableObject.h"
34#include "RegisterFile.h"
35#include "SymbolTable.h"
36#include "Nodes.h"
37
38namespace JSC {
39
40 class Arguments;
41 class Register;
42
43 class JSActivation : public JSVariableObject {
44 typedef JSVariableObject Base;
45 public:
46 JSActivation(CallFrame*, NonNullPassRefPtr<FunctionExecutable>);
47 virtual ~JSActivation();
48
49 virtual void markChildren(MarkStack&);
50
51 virtual bool isDynamicScope() const;
52
53 virtual bool isActivationObject() const { return true; }
54
55 virtual bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&);
56
57 virtual void put(ExecState*, const Identifier&, JSValue, PutPropertySlot&);
58
59 virtual void putWithAttributes(ExecState*, const Identifier&, JSValue, unsigned attributes);
60 virtual bool deleteProperty(ExecState*, const Identifier& propertyName);
61
62 virtual JSObject* toThisObject(ExecState*) const;
63
64 void copyRegisters(Arguments* arguments);
65
66 virtual const ClassInfo* classInfo() const { return &info; }
67 static const ClassInfo info;
68
69 static PassRefPtr<Structure> createStructure(JSValue proto) { return Structure::create(prototype: proto, typeInfo: TypeInfo(ObjectType, StructureFlags)); }
70
71 protected:
72 static const unsigned StructureFlags = OverridesGetOwnPropertySlot | NeedsThisConversion | OverridesMarkChildren | OverridesGetPropertyNames | JSVariableObject::StructureFlags;
73
74 private:
75 struct JSActivationData : public JSVariableObjectData {
76 JSActivationData(NonNullPassRefPtr<FunctionExecutable> _functionExecutable, Register* registers)
77 : JSVariableObjectData(_functionExecutable->generatedBytecode().symbolTable(), registers)
78 , functionExecutable(_functionExecutable)
79 {
80 // We have to manually ref and deref the symbol table as JSVariableObjectData
81 // doesn't know about SharedSymbolTable
82 functionExecutable->generatedBytecode().sharedSymbolTable()->ref();
83 }
84 ~JSActivationData()
85 {
86 static_cast<SharedSymbolTable*>(symbolTable)->deref();
87 }
88
89 RefPtr<FunctionExecutable> functionExecutable;
90 };
91
92 static JSValue argumentsGetter(ExecState*, const Identifier&, const PropertySlot&);
93 NEVER_INLINE PropertySlot::GetValueFunc getArgumentsGetter();
94
95 JSActivationData* d() const { return static_cast<JSActivationData*>(JSVariableObject::d); }
96 };
97
98 JSActivation* asActivation(JSValue);
99
100 inline JSActivation* asActivation(JSValue value)
101 {
102 ASSERT(asObject(value)->inherits(&JSActivation::info));
103 return static_cast<JSActivation*>(asObject(value));
104 }
105
106} // namespace JSC
107
108#endif // JSActivation_h
109

source code of qtscript/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSActivation.h