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Diffstat (limited to 'src/qml/qml/qqmlvme_p.h')
-rw-r--r-- | src/qml/qml/qqmlvme_p.h | 240 |
1 files changed, 240 insertions, 0 deletions
diff --git a/src/qml/qml/qqmlvme_p.h b/src/qml/qml/qqmlvme_p.h new file mode 100644 index 0000000000..8c8d4d079e --- /dev/null +++ b/src/qml/qml/qqmlvme_p.h @@ -0,0 +1,240 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/ +** +** This file is part of the QtQml module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** GNU Lesser General Public License Usage +** 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, Nokia gives you certain additional +** rights. These rights are described in the Nokia 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. +** +** Other Usage +** Alternatively, this file may be used in accordance with the terms and +** conditions contained in a signed written agreement between you and Nokia. +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef QQMLVME_P_H +#define QQMLVME_P_H + +// +// W A R N I N G +// ------------- +// +// This file is not part of the Qt API. It exists purely as an +// implementation detail. This header file may change from version to +// version without notice, or even be removed. +// +// We mean it. +// + +#include "qqmlerror.h" +#include <private/qbitfield_p.h> +#include "qqmlinstruction_p.h" +#include <private/qrecursionwatcher_p.h> + +#include <QtCore/QStack> +#include <QtCore/QString> +#include <QtCore/qelapsedtimer.h> +#include <QtCore/qcoreapplication.h> + +#include <private/qv8_p.h> +#include <private/qqmlengine_p.h> +#include <private/qfinitestack_p.h> + +#include <private/qqmltrace_p.h> + +QT_BEGIN_NAMESPACE + +class QObject; +class QJSValue; +class QQmlScriptData; +class QQmlCompiledData; +class QQmlCompiledData; +class QQmlContextData; + +namespace QQmlVMETypes { + struct List + { + List() : type(0) {} + List(int t) : type(t) {} + + int type; + QQmlListProperty<void> qListProperty; + }; +} +Q_DECLARE_TYPEINFO(QQmlVMETypes::List, Q_PRIMITIVE_TYPE | Q_MOVABLE_TYPE); + +class QQmlVME +{ + Q_DECLARE_TR_FUNCTIONS(QQmlVME) +public: + class Interrupt { + public: + inline Interrupt(); + inline Interrupt(bool *runWhile); + inline Interrupt(int nsecs); + + inline void reset(); + inline bool shouldInterrupt() const; + private: + enum Mode { None, Time, Flag }; + Mode mode; + union { + struct { + QElapsedTimer timer; + int nsecs; + }; + bool *runWhile; + }; + }; + + QQmlVME() : data(0), componentAttached(0) {} + QQmlVME(void *data) : data(data), componentAttached(0) {} + + void *data; + QQmlComponentAttached *componentAttached; + QList<QQmlEnginePrivate::FinalizeCallback> finalizeCallbacks; + + void init(QQmlContextData *, QQmlCompiledData *, int start, + QQmlContextData * = 0); + bool initDeferred(QObject *); + void reset(); + + QObject *execute(QList<QQmlError> *errors, const Interrupt & = Interrupt()); + QQmlContextData *complete(const Interrupt & = Interrupt()); + +private: + friend class QQmlVMEGuard; + + QObject *run(QList<QQmlError> *errors, const Interrupt & +#ifdef QML_THREADED_VME_INTERPRETER + , void ***storeJumpTable = 0 +#endif + ); + v8::Persistent<v8::Object> run(QQmlContextData *, QQmlScriptData *); + +#ifdef QML_THREADED_VME_INTERPRETER + static void **instructionJumpTable(); + friend class QQmlCompiledData; +#endif + + QQmlEngine *engine; + QRecursionNode recursion; + +#ifdef QML_ENABLE_TRACE + QQmlCompiledData *rootComponent; +#endif + + QFiniteStack<QObject *> objects; + QFiniteStack<QQmlVMETypes::List> lists; + + QFiniteStack<QQmlAbstractBinding *> bindValues; + QFiniteStack<QQmlParserStatus *> parserStatus; +#ifdef QML_ENABLE_TRACE + QFiniteStack<QQmlData *> parserStatusData; +#endif + + QQmlGuardedContextData rootContext; + QQmlGuardedContextData creationContext; + + struct State { + enum Flag { Deferred = 0x00000001 }; + + State() : flags(0), context(0), compiledData(0), instructionStream(0) {} + quint32 flags; + QQmlContextData *context; + QQmlCompiledData *compiledData; + const char *instructionStream; + QBitField bindingSkipList; + }; + + QStack<State> states; + + static void blank(QFiniteStack<QQmlParserStatus *> &); + static void blank(QFiniteStack<QQmlAbstractBinding *> &); +}; + +// Used to check that a QQmlVME that is interrupted mid-execution +// is still valid. Checks all the objects and contexts have not been +// deleted. +class QQmlVMEGuard +{ +public: + QQmlVMEGuard(); + ~QQmlVMEGuard(); + + void guard(QQmlVME *); + void clear(); + + bool isOK() const; + +private: + int m_objectCount; + QQmlGuard<QObject> *m_objects; + int m_contextCount; + QQmlGuardedContextData *m_contexts; +}; + +QQmlVME::Interrupt::Interrupt() +: mode(None) +{ +} + +QQmlVME::Interrupt::Interrupt(bool *runWhile) +: mode(Flag), runWhile(runWhile) +{ +} + +QQmlVME::Interrupt::Interrupt(int nsecs) +: mode(Time), nsecs(nsecs) +{ +} + +void QQmlVME::Interrupt::reset() +{ + if (mode == Time) + timer.start(); +} + +bool QQmlVME::Interrupt::shouldInterrupt() const +{ + if (mode == None) { + return false; + } else if (mode == Time) { + return timer.nsecsElapsed() > nsecs; + } else if (mode == Flag) { + return !*runWhile; + } else { + return false; + } +} + +QT_END_NAMESPACE + +#endif // QQMLVME_P_H |