JavaScriptCore-7600.1.4.11.8.tar.gz
[apple/javascriptcore.git] / runtime / JSVariableObject.h
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9dae56ea 1/*
93a37866 2 * Copyright (C) 2007, 2008, 2012 Apple Inc. All rights reserved.
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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.
81345200 13 * 3. Neither the name of Apple Inc. ("Apple") nor the names of
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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 JSVariableObject_h
30#define JSVariableObject_h
31
32#include "JSObject.h"
93a37866 33#include "JSSymbolTableObject.h"
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34#include "Register.h"
35#include "SymbolTable.h"
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36
37namespace JSC {
38
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39class LLIntOffsetsExtractor;
40class Register;
9dae56ea 41
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42class JSVariableObject : public JSSymbolTableObject {
43 friend class JIT;
44 friend class LLIntOffsetsExtractor;
9dae56ea 45
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46public:
47 typedef JSSymbolTableObject Base;
6fe7ccc8 48
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49 WriteBarrierBase<Unknown>* registers() { return m_registers; }
50 WriteBarrierBase<Unknown>& registerAt(int index) const { return m_registers[index]; }
9dae56ea 51
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52 WriteBarrierBase<Unknown>* const * addressOfRegisters() const { return &m_registers; }
53 static size_t offsetOfRegisters() { return OBJECT_OFFSETOF(JSVariableObject, m_registers); }
14957cd0 54
81345200 55 DECLARE_INFO;
14957cd0 56
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57protected:
58 static const unsigned StructureFlags = Base::StructureFlags;
93a37866 59
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60 JSVariableObject(
61 VM& vm,
62 Structure* structure,
63 Register* registers,
64 JSScope* scope,
65 SymbolTable* symbolTable = 0)
66 : Base(vm, structure, scope, symbolTable)
67 , m_registers(reinterpret_cast<WriteBarrierBase<Unknown>*>(registers))
68 {
69 }
9dae56ea 70
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71 WriteBarrierBase<Unknown>* m_registers; // "r" in the stack.
72};
9dae56ea 73
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74} // namespace JSC
75
76#endif // JSVariableObject_h