X-Git-Url: https://git.saurik.com/apple/javascriptcore.git/blobdiff_plain/9dae56ea45a0f5f8136a5c93d6f3a7f99399ca73..ed1e77d3adeb83d26fd1dfb16dd84cabdcefd250:/runtime/JSVariableObject.h?ds=inline

diff --git a/runtime/JSVariableObject.h b/runtime/JSVariableObject.h
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-/*
- * 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&, JSValuePtr, 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&, JSValuePtr);
-        bool symbolTablePutWithAttributes(const Identifier&, JSValuePtr, 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(&registerAt(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(&registerAt(entry.getIndex()));
-            slotIsWriteable = !entry.isReadOnly();
-            return true;
-        }
-        return false;
-    }
-
-    inline bool JSVariableObject::symbolTablePut(const Identifier& propertyName, JSValuePtr 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, JSValuePtr 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