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+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtQml module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia. For licensing terms and
+** conditions see http://qt.digia.com/licensing. For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights. These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#ifndef QV4ENGINE_H
+#define QV4ENGINE_H
+
+#include "qv4global_p.h"
+#include "private/qv4isel_p.h"
+#include "qv4util_p.h"
+#include "qv4context_p.h"
+#include "qv4property_p.h"
+#include <private/qintrusivelist_p.h>
+
+namespace WTF {
+class BumpPointerAllocator;
+}
+
+QT_BEGIN_NAMESPACE
+
+class QV8Engine;
+
+namespace QV4 {
+namespace Debugging {
+class Debugger;
+} // namespace Debugging
+}
+
+namespace QV4 {
+
+struct Function;
+struct Object;
+struct BooleanObject;
+struct NumberObject;
+struct StringObject;
+struct ArrayObject;
+struct DateObject;
+struct FunctionObject;
+struct BoundFunction;
+struct RegExpObject;
+struct ErrorObject;
+struct ArgumentsObject;
+struct ExecutionContext;
+struct ExecutionEngine;
+class MemoryManager;
+class UnwindHelper;
+class ExecutableAllocator;
+
+struct ObjectPrototype;
+struct StringPrototype;
+struct NumberPrototype;
+struct BooleanPrototype;
+struct ArrayPrototype;
+struct FunctionPrototype;
+struct DatePrototype;
+struct RegExpPrototype;
+struct ErrorPrototype;
+struct EvalErrorPrototype;
+struct RangeErrorPrototype;
+struct ReferenceErrorPrototype;
+struct SyntaxErrorPrototype;
+struct TypeErrorPrototype;
+struct URIErrorPrototype;
+struct VariantPrototype;
+struct SequencePrototype;
+struct EvalFunction;
+struct IdentifierTable;
+struct InternalClass;
+class MultiplyWrappedQObjectMap;
+class RegExp;
+class RegExpCache;
+struct QmlExtensions;
+
+struct Q_QML_EXPORT ExecutionEngine
+{
+ MemoryManager *memoryManager;
+ ExecutableAllocator *executableAllocator;
+ ExecutableAllocator *regExpAllocator;
+ QScopedPointer<QQmlJS::EvalISelFactory> iselFactory;
+
+ ExecutionContext *current;
+ GlobalContext *rootContext;
+
+ WTF::BumpPointerAllocator *bumperPointerAllocator; // Used by Yarr Regex engine.
+
+ IdentifierTable *identifierTable;
+
+ QV4::Debugging::Debugger *debugger;
+
+ Object *globalObject;
+
+ Function *globalCode;
+
+ QV8Engine *v8Engine;
+
+ Value objectCtor;
+ Value stringCtor;
+ Value numberCtor;
+ Value booleanCtor;
+ Value arrayCtor;
+ Value functionCtor;
+ Value dateCtor;
+ Value regExpCtor;
+ Value errorCtor;
+ Value evalErrorCtor;
+ Value rangeErrorCtor;
+ Value referenceErrorCtor;
+ Value syntaxErrorCtor;
+ Value typeErrorCtor;
+ Value uRIErrorCtor;
+
+ ObjectPrototype *objectPrototype;
+ StringPrototype *stringPrototype;
+ NumberPrototype *numberPrototype;
+ BooleanPrototype *booleanPrototype;
+ ArrayPrototype *arrayPrototype;
+ FunctionPrototype *functionPrototype;
+ DatePrototype *datePrototype;
+ RegExpPrototype *regExpPrototype;
+ ErrorPrototype *errorPrototype;
+ EvalErrorPrototype *evalErrorPrototype;
+ RangeErrorPrototype *rangeErrorPrototype;
+ ReferenceErrorPrototype *referenceErrorPrototype;
+ SyntaxErrorPrototype *syntaxErrorPrototype;
+ TypeErrorPrototype *typeErrorPrototype;
+ URIErrorPrototype *uRIErrorPrototype;
+
+ VariantPrototype *variantPrototype;
+ SequencePrototype *sequencePrototype;
+
+ QQmlJS::MemoryPool classPool;
+ InternalClass *emptyClass;
+ InternalClass *arrayClass;
+
+ EvalFunction *evalFunction;
+
+ QVector<Property> argumentsAccessors;
+
+ String *id_undefined;
+ String *id_null;
+ String *id_true;
+ String *id_false;
+ String *id_boolean;
+ String *id_number;
+ String *id_string;
+ String *id_object;
+ String *id_function;
+ String *id_length;
+ String *id_prototype;
+ String *id_constructor;
+ String *id_arguments;
+ String *id_caller;
+ String *id_this;
+ String *id___proto__;
+ String *id_enumerable;
+ String *id_configurable;
+ String *id_writable;
+ String *id_value;
+ String *id_get;
+ String *id_set;
+ String *id_eval;
+ String *id_uintMax;
+ String *id_name;
+
+ mutable QVector<Function *> functions;
+ mutable bool functionsNeedSort;
+
+ quint32 m_engineId;
+
+ RegExpCache *regExpCache;
+
+ // Scarce resources are "exceptionally high cost" QVariant types where allowing the
+ // normal JavaScript GC to clean them up is likely to lead to out-of-memory or other
+ // out-of-resource situations. When such a resource is passed into JavaScript we
+ // add it to the scarceResources list and it is destroyed when we return from the
+ // JavaScript execution that created it. The user can prevent this behavior by
+ // calling preserve() on the object which removes it from this scarceResource list.
+ class ScarceResourceData {
+ public:
+ ScarceResourceData(const QVariant &data) : data(data) {}
+ QVariant data;
+ QIntrusiveListNode node;
+ };
+ QIntrusiveList<ScarceResourceData, &ScarceResourceData::node> scarceResources;
+
+ // Normally the JS wrappers for QObjects are stored in the QQmlData/QObjectPrivate,
+ // but any time a QObject is wrapped a second time in another engine, we have to do
+ // bookkeeping.
+ MultiplyWrappedQObjectMap *m_multiplyWrappedQObjects;
+
+ ExecutionEngine(QQmlJS::EvalISelFactory *iselFactory = 0);
+ ~ExecutionEngine();
+
+ void enableDebugger();
+
+ WithContext *newWithContext(Object *with);
+ CatchContext *newCatchContext(String* exceptionVarName, const QV4::Value &exceptionValue);
+ CallContext *newCallContext(FunctionObject *f, const QV4::Value &thisObject, QV4::Value *args, int argc);
+ CallContext *newCallContext(void *stackSpace, FunctionObject *f, const QV4::Value &thisObject, QV4::Value *args, int argc);
+ CallContext *newQmlContext(FunctionObject *f, Object *qml);
+ ExecutionContext *pushGlobalContext();
+ void pushContext(SimpleCallContext *context);
+ ExecutionContext *popContext();
+
+ Function *newFunction(const QString &name);
+
+ FunctionObject *newBuiltinFunction(ExecutionContext *scope, String *name, Value (*code)(SimpleCallContext *));
+ FunctionObject *newScriptFunction(ExecutionContext *scope, Function *function);
+ BoundFunction *newBoundFunction(ExecutionContext *scope, FunctionObject *target, Value boundThis, const QVector<Value> &boundArgs);
+
+ Object *newObject();
+ Object *newObject(InternalClass *internalClass);
+
+ String *newString(const QString &s);
+ String *newIdentifier(const QString &text);
+
+ Object *newStringObject(const Value &value);
+ Object *newNumberObject(const Value &value);
+ Object *newBooleanObject(const Value &value);
+
+ ArrayObject *newArrayObject(int count = 0);
+ ArrayObject *newArrayObject(const QStringList &list);
+
+ DateObject *newDateObject(const Value &value);
+ DateObject *newDateObject(const QDateTime &dt);
+
+ RegExpObject *newRegExpObject(const QString &pattern, int flags);
+ RegExpObject *newRegExpObject(RegExp* re, bool global);
+ RegExpObject *newRegExpObject(const QRegExp &re);
+
+ Object *newErrorObject(const Value &value);
+ Object *newSyntaxErrorObject(ExecutionContext *ctx, DiagnosticMessage *message);
+ Object *newSyntaxErrorObject(const QString &message);
+ Object *newReferenceErrorObject(const QString &message);
+ Object *newReferenceErrorObject(const QString &message, const QString &fileName, int lineNumber);
+ Object *newTypeErrorObject(const QString &message);
+ Object *newRangeErrorObject(const QString &message);
+ Object *newURIErrorObject(Value message);
+
+ Object *newVariantObject(const QVariant &v);
+
+ Object *newForEachIteratorObject(ExecutionContext *ctx, Object *o);
+
+ Object *qmlContextObject() const;
+
+ struct StackFrame {
+ QString source;
+ QString function;
+ int line;
+ int column;
+ };
+ typedef QVector<StackFrame> StackTrace;
+ StackTrace stackTrace(int frameLimit = -1) const;
+ StackFrame currentStackFrame() const;
+ QUrl resolvedUrl(const QString &file);
+
+ void requireArgumentsAccessors(int n);
+
+ void markObjects();
+
+ void initRootContext();
+
+ InternalClass *newClass(const InternalClass &other);
+
+ Function *functionForProgramCounter(quintptr pc) const;
+
+ QmlExtensions *qmlExtensions();
+
+private:
+ QmlExtensions *m_qmlExtensions;
+};
+
+inline void ExecutionEngine::pushContext(SimpleCallContext *context)
+{
+ context->parent = current;
+ current = context;
+ current->currentEvalCode = 0;
+}
+
+inline ExecutionContext *ExecutionEngine::popContext()
+{
+ CallContext *c = current->asCallContext();
+ if (c && !c->needsOwnArguments()) {
+ c->arguments = 0;
+ c->argumentCount = 0;
+ }
+
+ current = current->parent;
+ return current;
+}
+
+} // namespace QV4
+
+QT_END_NAMESPACE
+
+#endif // QV4ENGINE_H
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