1 /****************************************************************************
3 ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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5 ** Contact: Nokia Corporation (qt-info@nokia.com)
7 ** This file is part of the QtDeclarative module of the Qt Toolkit.
9 ** $QT_BEGIN_LICENSE:LGPL$
10 ** GNU Lesser General Public License Usage
11 ** This file may be used under the terms of the GNU Lesser General Public
12 ** License version 2.1 as published by the Free Software Foundation and
13 ** appearing in the file LICENSE.LGPL included in the packaging of this
14 ** file. Please review the following information to ensure the GNU Lesser
15 ** General Public License version 2.1 requirements will be met:
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18 ** In addition, as a special exception, Nokia gives you certain additional
19 ** rights. These rights are described in the Nokia Qt LGPL Exception
20 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
22 ** GNU General Public License Usage
23 ** Alternatively, this file may be used under the terms of the GNU General
24 ** Public License version 3.0 as published by the Free Software Foundation
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26 ** file. Please review the following information to ensure the GNU General
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40 ****************************************************************************/
42 #ifndef QDECLARATIVEVME_P_H
43 #define QDECLARATIVEVME_P_H
49 // This file is not part of the Qt API. It exists purely as an
50 // implementation detail. This header file may change from version to
51 // version without notice, or even be removed.
56 #include "qdeclarativeerror.h"
57 #include "private/qbitfield_p.h"
58 #include "private/qdeclarativeinstruction_p.h"
60 #include <QtCore/QStack>
61 #include <QtCore/QString>
62 #include <QtCore/qelapsedtimer.h>
63 #include <QtCore/qcoreapplication.h>
65 #include <private/qv8_p.h>
66 #include <private/qdeclarativeengine_p.h>
67 #include <private/qfinitestack_p.h>
73 class QDeclarativeScriptData;
74 class QDeclarativeCompiledData;
75 class QDeclarativeCompiledData;
76 class QDeclarativeContextData;
78 namespace QDeclarativeVMETypes {
82 List(int t) : type(t) {}
85 QDeclarativeListProperty<void> qListProperty;
88 Q_DECLARE_TYPEINFO(QDeclarativeVMETypes::List, Q_PRIMITIVE_TYPE | Q_MOVABLE_TYPE);
92 Q_DECLARE_TR_FUNCTIONS(QDeclarativeVME)
97 inline Interrupt(bool *runWhile);
98 inline Interrupt(int nsecs);
101 inline bool shouldInterrupt() const;
103 enum Mode { None, Time, Flag };
114 QDeclarativeVME() : data(0), componentAttached(0) {}
115 QDeclarativeVME(void *data) : data(data), componentAttached(0) {}
118 QDeclarativeComponentAttached *componentAttached;
119 QList<QDeclarativeEnginePrivate::FinalizeCallback> finalizeCallbacks;
121 void init(QDeclarativeContextData *, QDeclarativeCompiledData *, int start);
122 bool initDeferred(QObject *);
125 QObject *execute(QList<QDeclarativeError> *errors, const Interrupt & = Interrupt());
126 bool complete(const Interrupt & = Interrupt());
129 friend class QDeclarativeVMEGuard;
131 QObject *run(QList<QDeclarativeError> *errors, const Interrupt &
132 #ifdef QML_THREADED_VME_INTERPRETER
133 , void ***storeJumpTable = 0
136 v8::Persistent<v8::Object> run(QDeclarativeContextData *, QDeclarativeScriptData *);
138 #ifdef QML_THREADED_VME_INTERPRETER
139 static void **instructionJumpTable();
140 friend class QDeclarativeCompiledData;
143 QDeclarativeEngine *engine;
145 QFiniteStack<QObject *> objects;
146 QFiniteStack<QDeclarativeVMETypes::List> lists;
148 QFiniteStack<QDeclarativeAbstractBinding *> bindValues;
149 QFiniteStack<QDeclarativeParserStatus *> parserStatus;
150 QDeclarativeGuardedContextData rootContext;
153 enum Flag { Deferred = 0x00000001 };
155 State() : flags(0), context(0), compiledData(0), instructionStream(0) {}
157 QDeclarativeContextData *context;
158 QDeclarativeCompiledData *compiledData;
159 const char *instructionStream;
160 QBitField bindingSkipList;
163 QStack<State> states;
165 static void blank(QFiniteStack<QDeclarativeParserStatus *> &);
166 static void blank(QFiniteStack<QDeclarativeAbstractBinding *> &);
169 // Used to check that a QDeclarativeVME that is interrupted mid-execution
170 // is still valid. Checks all the objects and contexts have not been
172 class QDeclarativeVMEGuard
175 QDeclarativeVMEGuard();
176 ~QDeclarativeVMEGuard();
178 void guard(QDeclarativeVME *);
185 QDeclarativeGuard<QObject> *m_objects;
187 QDeclarativeGuardedContextData *m_contexts;
190 QDeclarativeVME::Interrupt::Interrupt()
195 QDeclarativeVME::Interrupt::Interrupt(bool *runWhile)
196 : mode(Flag), runWhile(runWhile)
200 QDeclarativeVME::Interrupt::Interrupt(int nsecs)
201 : mode(Time), nsecs(nsecs)
205 void QDeclarativeVME::Interrupt::reset()
211 bool QDeclarativeVME::Interrupt::shouldInterrupt() const
215 } else if (mode == Time) {
216 return timer.nsecsElapsed() > nsecs;
217 } else if (mode == Flag) {
226 #endif // QDECLARATIVEVME_P_H