+++ /dev/null
-/*
- * Copyright (C) 2007, 2008 Apple Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. 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.
- * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
- * its contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS 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 APPLE OR ITS CONTRIBUTORS 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.
- */
-
-#ifndef JSVariableObject_h
-#define JSVariableObject_h
-
-#include "JSObject.h"
-#include "Register.h"
-#include "SymbolTable.h"
-#include "UnusedParam.h"
-#include <wtf/OwnArrayPtr.h>
-#include <wtf/UnusedParam.h>
-
-namespace JSC {
-
- class Register;
-
- class JSVariableObject : public JSObject {
- friend class JIT;
-
- public:
- SymbolTable& symbolTable() const { return *d->symbolTable; }
-
- virtual void putWithAttributes(ExecState*, const Identifier&, JSValue, unsigned attributes) = 0;
-
- virtual bool deleteProperty(ExecState*, const Identifier&);
- virtual void getPropertyNames(ExecState*, PropertyNameArray&);
-
- virtual bool isVariableObject() const;
- virtual bool isDynamicScope() const = 0;
-
- virtual bool getPropertyAttributes(ExecState*, const Identifier& propertyName, unsigned& attributes) const;
-
- Register& registerAt(int index) const { return d->registers[index]; }
-
- protected:
- // Subclasses of JSVariableObject can subclass this struct to add data
- // without increasing their own size (since there's a hard limit on the
- // size of a JSCell).
- struct JSVariableObjectData {
- JSVariableObjectData(SymbolTable* symbolTable, Register* registers)
- : symbolTable(symbolTable)
- , registers(registers)
- {
- ASSERT(symbolTable);
- }
-
- SymbolTable* symbolTable; // Maps name -> offset from "r" in register file.
- Register* registers; // "r" in the register file.
- OwnArrayPtr<Register> registerArray; // Independent copy of registers, used when a variable object copies its registers out of the register file.
-
- private:
- JSVariableObjectData(const JSVariableObjectData&);
- JSVariableObjectData& operator=(const JSVariableObjectData&);
- };
-
- JSVariableObject(PassRefPtr<Structure> structure, JSVariableObjectData* data)
- : JSObject(structure)
- , d(data) // Subclass owns this pointer.
- {
- }
-
- Register* copyRegisterArray(Register* src, size_t count);
- void setRegisters(Register* r, Register* registerArray);
-
- bool symbolTableGet(const Identifier&, PropertySlot&);
- bool symbolTableGet(const Identifier&, PropertySlot&, bool& slotIsWriteable);
- bool symbolTablePut(const Identifier&, JSValue);
- bool symbolTablePutWithAttributes(const Identifier&, JSValue, unsigned attributes);
-
- JSVariableObjectData* d;
- };
-
- inline bool JSVariableObject::symbolTableGet(const Identifier& propertyName, PropertySlot& slot)
- {
- SymbolTableEntry entry = symbolTable().inlineGet(propertyName.ustring().rep());
- if (!entry.isNull()) {
- slot.setRegisterSlot(®isterAt(entry.getIndex()));
- return true;
- }
- return false;
- }
-
- inline bool JSVariableObject::symbolTableGet(const Identifier& propertyName, PropertySlot& slot, bool& slotIsWriteable)
- {
- SymbolTableEntry entry = symbolTable().inlineGet(propertyName.ustring().rep());
- if (!entry.isNull()) {
- slot.setRegisterSlot(®isterAt(entry.getIndex()));
- slotIsWriteable = !entry.isReadOnly();
- return true;
- }
- return false;
- }
-
- inline bool JSVariableObject::symbolTablePut(const Identifier& propertyName, JSValue value)
- {
- ASSERT(!Heap::heap(value) || Heap::heap(value) == Heap::heap(this));
-
- SymbolTableEntry entry = symbolTable().inlineGet(propertyName.ustring().rep());
- if (entry.isNull())
- return false;
- if (entry.isReadOnly())
- return true;
- registerAt(entry.getIndex()) = value;
- return true;
- }
-
- inline bool JSVariableObject::symbolTablePutWithAttributes(const Identifier& propertyName, JSValue value, unsigned attributes)
- {
- ASSERT(!Heap::heap(value) || Heap::heap(value) == Heap::heap(this));
-
- SymbolTable::iterator iter = symbolTable().find(propertyName.ustring().rep());
- if (iter == symbolTable().end())
- return false;
- SymbolTableEntry& entry = iter->second;
- ASSERT(!entry.isNull());
- entry.setAttributes(attributes);
- registerAt(entry.getIndex()) = value;
- return true;
- }
-
- inline Register* JSVariableObject::copyRegisterArray(Register* src, size_t count)
- {
- Register* registerArray = new Register[count];
- memcpy(registerArray, src, count * sizeof(Register));
-
- return registerArray;
- }
-
- inline void JSVariableObject::setRegisters(Register* registers, Register* registerArray)
- {
- ASSERT(registerArray != d->registerArray.get());
- d->registerArray.set(registerArray);
- d->registers = registers;
- }
-
-} // namespace JSC
-
-#endif // JSVariableObject_h
projects / apple / javascriptcore.git / blobdiff