JavaScriptCore-1218.tar.gz

[apple/javascriptcore.git] / runtime / JSSymbolTableObject.h

diff --git a/runtime/JSSymbolTableObject.h b/runtime/JSSymbolTableObject.h
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+/*
+ * Copyright (C) 2012 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 JSSymbolTableObject_h
+#define JSSymbolTableObject_h
+
+#include "JSScope.h"
+#include "PropertyDescriptor.h"
+#include "SymbolTable.h"
+
+namespace JSC {
+
+class JSSymbolTableObject : public JSScope {
+public:
+    typedef JSScope Base;
+    
+    SharedSymbolTable* symbolTable() const { return m_symbolTable.get(); }
+    
+    static NO_RETURN_DUE_TO_CRASH void putDirectVirtual(JSObject*, ExecState*, PropertyName, JSValue, unsigned attributes);
+    
+    JS_EXPORT_PRIVATE static bool deleteProperty(JSCell*, ExecState*, PropertyName);
+    JS_EXPORT_PRIVATE static void getOwnNonIndexPropertyNames(JSObject*, ExecState*, PropertyNameArray&, EnumerationMode);
+    
+protected:
+    static const unsigned StructureFlags = IsEnvironmentRecord | OverridesVisitChildren | OverridesGetPropertyNames | Base::StructureFlags;
+    
+    JSSymbolTableObject(VM& vm, Structure* structure, JSScope* scope, SharedSymbolTable* symbolTable = 0)
+        : Base(vm, structure, scope)
+    {
+        if (symbolTable)
+            m_symbolTable.set(vm, this, symbolTable);
+    }
+
+    void finishCreation(VM& vm)
+    {
+        Base::finishCreation(vm);
+        if (!m_symbolTable)
+            m_symbolTable.set(vm, this, SharedSymbolTable::create(vm));
+    }
+
+    static void visitChildren(JSCell*, SlotVisitor&);
+
+    WriteBarrier<SharedSymbolTable> m_symbolTable;
+};
+
+template<typename SymbolTableObjectType>
+inline bool symbolTableGet(
+    SymbolTableObjectType* object, PropertyName propertyName, PropertySlot& slot)
+{
+    SymbolTable& symbolTable = *object->symbolTable();
+    SymbolTable::iterator iter = symbolTable.find(propertyName.publicName());
+    if (iter == symbolTable.end())
+        return false;
+    SymbolTableEntry::Fast entry = iter->value;
+    ASSERT(!entry.isNull());
+    slot.setValue(object->registerAt(entry.getIndex()).get());
+    return true;
+}
+
+template<typename SymbolTableObjectType>
+inline bool symbolTableGet(
+    SymbolTableObjectType* object, PropertyName propertyName, PropertyDescriptor& descriptor)
+{
+    SymbolTable& symbolTable = *object->symbolTable();
+    SymbolTable::iterator iter = symbolTable.find(propertyName.publicName());
+    if (iter == symbolTable.end())
+        return false;
+    SymbolTableEntry::Fast entry = iter->value;
+    ASSERT(!entry.isNull());
+    descriptor.setDescriptor(
+        object->registerAt(entry.getIndex()).get(), entry.getAttributes() | DontDelete);
+    return true;
+}
+
+template<typename SymbolTableObjectType>
+inline bool symbolTableGet(
+    SymbolTableObjectType* object, PropertyName propertyName, PropertySlot& slot,
+    bool& slotIsWriteable)
+{
+    SymbolTable& symbolTable = *object->symbolTable();
+    SymbolTable::iterator iter = symbolTable.find(propertyName.publicName());
+    if (iter == symbolTable.end())
+        return false;
+    SymbolTableEntry::Fast entry = iter->value;
+    ASSERT(!entry.isNull());
+    slot.setValue(object->registerAt(entry.getIndex()).get());
+    slotIsWriteable = !entry.isReadOnly();
+    return true;
+}
+
+template<typename SymbolTableObjectType>
+inline bool symbolTablePut(
+    SymbolTableObjectType* object, ExecState* exec, PropertyName propertyName, JSValue value,
+    bool shouldThrow)
+{
+    VM& vm = exec->vm();
+    ASSERT(!Heap::heap(value) || Heap::heap(value) == Heap::heap(object));
+    
+    SymbolTable& symbolTable = *object->symbolTable();
+    SymbolTable::iterator iter = symbolTable.find(propertyName.publicName());
+    if (iter == symbolTable.end())
+        return false;
+    bool wasFat;
+    SymbolTableEntry::Fast fastEntry = iter->value.getFast(wasFat);
+    ASSERT(!fastEntry.isNull());
+    if (fastEntry.isReadOnly()) {
+        if (shouldThrow)
+            throwTypeError(exec, StrictModeReadonlyPropertyWriteError);
+        return true;
+    }
+    if (UNLIKELY(wasFat))
+        iter->value.notifyWrite();
+    object->registerAt(fastEntry.getIndex()).set(vm, object, value);
+    return true;
+}
+
+template<typename SymbolTableObjectType>
+inline bool symbolTablePutWithAttributes(
+    SymbolTableObjectType* object, VM& vm, PropertyName propertyName,
+    JSValue value, unsigned attributes)
+{
+    ASSERT(!Heap::heap(value) || Heap::heap(value) == Heap::heap(object));
+    
+    SymbolTable::iterator iter = object->symbolTable()->find(propertyName.publicName());
+    if (iter == object->symbolTable()->end())
+        return false;
+    SymbolTableEntry& entry = iter->value;
+    ASSERT(!entry.isNull());
+    entry.notifyWrite();
+    entry.setAttributes(attributes);
+    object->registerAt(entry.getIndex()).set(vm, object, value);
+    return true;
+}
+
+} // namespace JSC
+
+#endif // JSSymbolTableObject_h
+