qjsengine

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qjsengine_p.h

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/****************************************************************************

** Contact: https://www.qt.io/licensing/

** 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 The Qt Company. For licensing terms

** and conditions see https://www.qt.io/terms-conditions. For further

** information use the contact form at https://www.qt.io/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 3 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL3 included in the

** packaging of this file. Please review the following information to

** ensure the GNU Lesser General Public License version 3 requirements

** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.

** GNU General Public License Usage

** Alternatively, this file may be used under the terms of the GNU

** General Public License version 2.0 or (at your option) the GNU General

** Public license version 3 or any later version approved by the KDE Free

** Qt Foundation. The licenses are as published by the Free Software

** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3

** included in the packaging of this file. Please review the following

** information to ensure the GNU General Public License requirements will

** be met: https://www.gnu.org/licenses/gpl-2.0.html and

** https://www.gnu.org/licenses/gpl-3.0.html.

** $QT_END_LICENSE$

****************************************************************************/

#ifndef QJSENGINE_P_H

#define QJSENGINE_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 <QtCore/private/qobject_p.h>

#include <QtCore/qmutex.h>

#include "qjsengine.h"

#include "private/qtqmlglobal_p.h"

#include <private/qqmlmetatype_p.h>

QT_BEGIN_NAMESPACE

class QQmlPropertyCache;

namespace QV4 {

struct ExecutionEngine;

}

class Q_QML_PRIVATE_EXPORT QJSEnginePrivate : public QObjectPrivate

{

Q_DECLARE_PUBLIC(QJSEngine)

public:

static QJSEnginePrivate* get(QJSEngine*e) { return e->d_func(); }

executed 103146 times by 35 tests: return e->d_func();

Executed by:

tst_examples
tst_multipointtoucharea_interop
tst_qqmlcontext
tst_qqmlecmascript
tst_qqmlinstantiator
tst_qqmllistmodel
tst_qqmllistmodelworkerscript
tst_qqmllocale
tst_qqmlproperty
tst_qqmlpropertymap
tst_qqmltypeloader
tst_qqmlvaluetypes
tst_qquickaccessible
tst_qquickanimations
tst_qquickdesignersupport
tst_qquickdrag
tst_qquickdraghandler
tst_qquickdroparea
tst_qquickflickable
tst_qquickgraphicsinfo
tst_qquickgridview
tst_qquickitem2
tst_qquickitemparticle
tst_qquicklayouts
tst_qquicklistview
...

103146

static const QJSEnginePrivate* get(const QJSEngine*e) { return e->d_func(); }

never executed: return e->d_func();

static QJSEnginePrivate* get(QV4::ExecutionEngine *e);

QJSEnginePrivate() : mutex(QMutex::Recursive) {}

executed 2664 times by 8 tests: end of block

Executed by:

tst_qjsengine
tst_qjsonbinding
tst_qjsvalue
tst_qjsvalueiterator
tst_qqmldebugjs
tst_qqmlecmascript
tst_qqmlvaluetypes
tst_qv4debugger

2664

~QJSEnginePrivate() override;

static void addToDebugServer(QJSEngine *q);

static void removeFromDebugServer(QJSEngine *q);

// Locker locks the QQmlEnginePrivate data structures for read and write, if necessary.

// Currently, locking is only necessary if the threaded loader is running concurrently. If it is

// either idle, or is running with the main thread blocked, no locking is necessary. This way

// we only pay for locking when we have to.

// Consequently, this class should only be used to protect simple accesses or modifications of the

// QQmlEnginePrivate structures or operations that can be guaranteed not to start activity

// on the loader thread.

// The Locker API is identical to QMutexLocker. Locker reuses the QQmlEnginePrivate::mutex

// QMutex instance and multiple Lockers are recursive in the same thread.

class Locker

{

public:

inline Locker(const QJSEngine *);

inline Locker(const QJSEnginePrivate *);

inline ~Locker();

inline void unlock();

100

inline void relock();

101

102

private:

103

const QJSEnginePrivate *m_ep;

quint32 m_locked:1;

};

// Shared by QQmlEngine

108

mutable QMutex mutex;

109

110

111

// These methods may be called from the QML loader thread

112

inline QQmlPropertyCache *cache(QObject *obj);

113

inline QQmlPropertyCache *cache(const QMetaObject *);

114

};

115

116

QJSEnginePrivate::Locker::Locker(const QJSEngine *e)

117

: m_ep(QJSEnginePrivate::get(e))

118

{

119

relock();

120

}

never executed: end of block

121

122

QJSEnginePrivate::Locker::Locker(const QJSEnginePrivate *e)

123

: m_ep(e), m_locked(false)

124

{

125

relock();

126

}

executed 600132 times by 142 tests: end of block

Executed by:

tst_bindingdependencyapi
tst_drawingmodes
tst_examples
tst_flickableinterop
tst_multipointtoucharea_interop
tst_parserstress
tst_qjsengine
tst_qmlcachegen
tst_qmldiskcache
tst_qqmlapplicationengine
tst_qqmlbinding
tst_qqmlcomponent
tst_qqmlconnections
tst_qqmlconsole
tst_qqmlcontext
tst_qqmldebugjs
tst_qqmlecmascript
tst_qqmlenginecleanup
tst_qqmlenginedebugservice
tst_qqmlexpression
tst_qqmlfileselector
tst_qqmlimport
tst_qqmlincubator
tst_qqmlinfo
tst_qqmlinstantiator
...

600132

127

128

QJSEnginePrivate::Locker::~Locker()

129

{

130

unlock();

131

}

executed 600132 times by 142 tests: end of block

Executed by:

tst_bindingdependencyapi
tst_drawingmodes
tst_examples
tst_flickableinterop
tst_multipointtoucharea_interop
tst_parserstress
tst_qjsengine
tst_qmlcachegen
tst_qmldiskcache
tst_qqmlapplicationengine
tst_qqmlbinding
tst_qqmlcomponent
tst_qqmlconnections
tst_qqmlconsole
tst_qqmlcontext
tst_qqmldebugjs
tst_qqmlecmascript
tst_qqmlenginecleanup
tst_qqmlenginedebugservice
tst_qqmlexpression
tst_qqmlfileselector
tst_qqmlimport
tst_qqmlincubator
tst_qqmlinfo
tst_qqmlinstantiator
...

600132

132

133

void QJSEnginePrivate::Locker::unlock()

134

{

135

if (m_locked) {

m_locked

Description

TRUE

evaluated 600132 times by 142 tests

Evaluated by:

tst_bindingdependencyapi
tst_drawingmodes
tst_examples
tst_flickableinterop
tst_multipointtoucharea_interop
tst_parserstress
tst_qjsengine
tst_qmlcachegen
tst_qmldiskcache
tst_qqmlapplicationengine
tst_qqmlbinding
tst_qqmlcomponent
tst_qqmlconnections
tst_qqmlconsole
tst_qqmlcontext
tst_qqmldebugjs
tst_qqmlecmascript
tst_qqmlenginecleanup
tst_qqmlenginedebugservice
tst_qqmlexpression
tst_qqmlfileselector
tst_qqmlimport
tst_qqmlincubator
tst_qqmlinfo
tst_qqmlinstantiator
...

FALSE

never evaluated

0-600132

136

m_ep->mutex.unlock();

137

m_locked = false;

138

}

executed 600132 times by 142 tests: end of block

Executed by:

tst_bindingdependencyapi
tst_drawingmodes
tst_examples
tst_flickableinterop
tst_multipointtoucharea_interop
tst_parserstress
tst_qjsengine
tst_qmlcachegen
tst_qmldiskcache
tst_qqmlapplicationengine
tst_qqmlbinding
tst_qqmlcomponent
tst_qqmlconnections
tst_qqmlconsole
tst_qqmlcontext
tst_qqmldebugjs
tst_qqmlecmascript
tst_qqmlenginecleanup
tst_qqmlenginedebugservice
tst_qqmlexpression
tst_qqmlfileselector
tst_qqmlimport
tst_qqmlincubator
tst_qqmlinfo
tst_qqmlinstantiator
...

600132

139

}

executed 600132 times by 142 tests: end of block

Executed by:

tst_bindingdependencyapi
tst_drawingmodes
tst_examples
tst_flickableinterop
tst_multipointtoucharea_interop
tst_parserstress
tst_qjsengine
tst_qmlcachegen
tst_qmldiskcache
tst_qqmlapplicationengine
tst_qqmlbinding
tst_qqmlcomponent
tst_qqmlconnections
tst_qqmlconsole
tst_qqmlcontext
tst_qqmldebugjs
tst_qqmlecmascript
tst_qqmlenginecleanup
tst_qqmlenginedebugservice
tst_qqmlexpression
tst_qqmlfileselector
tst_qqmlimport
tst_qqmlincubator
tst_qqmlinfo
tst_qqmlinstantiator
...

600132

140

141

void QJSEnginePrivate::Locker::relock()

{

Q_ASSERT(!m_locked);

m_ep->mutex.lock();

m_locked = true;

}

executed 600132 times by 142 tests: end of block

Executed by:

tst_bindingdependencyapi
tst_drawingmodes
tst_examples
tst_flickableinterop
tst_multipointtoucharea_interop
tst_parserstress
tst_qjsengine
tst_qmlcachegen
tst_qmldiskcache
tst_qqmlapplicationengine
tst_qqmlbinding
tst_qqmlcomponent
tst_qqmlconnections
tst_qqmlconsole
tst_qqmlcontext
tst_qqmldebugjs
tst_qqmlecmascript
tst_qqmlenginecleanup
tst_qqmlenginedebugservice
tst_qqmlexpression
tst_qqmlfileselector
tst_qqmlimport
tst_qqmlincubator
tst_qqmlinfo
tst_qqmlinstantiator
...

600132

147

148

/*!

149

Returns a QQmlPropertyCache for \a obj if one is available.

150

151

If \a obj is null, being deleted or contains a dynamic meta object 0

152

is returned.

153

154

The returned cache is not referenced, so if it is to be stored, call addref().

155

156

XXX thread There is a potential future race condition in this and all the cache()

157

functions. As the QQmlPropertyCache is returned unreferenced, when called

158

from the loader thread, it is possible that the cache will have been dereferenced

159

and deleted before the loader thread has a chance to use or reference it. This

160

can't currently happen as the cache holds a reference to the

161

QQmlPropertyCache until the QQmlEngine is destroyed.

162

163

QQmlPropertyCache *QJSEnginePrivate::cache(QObject *obj)

164

{

165

if (!obj || QObjectPrivate::get(obj)->metaObject || QObjectPrivate::get(obj)->wasDeleted)

!obj

Description

TRUE

never evaluated

FALSE

evaluated 103148 times by 35 tests

Evaluated by:

tst_examples
tst_multipointtoucharea_interop
tst_qqmlcontext
tst_qqmlecmascript
tst_qqmlinstantiator
tst_qqmllistmodel
tst_qqmllistmodelworkerscript
tst_qqmllocale
tst_qqmlproperty
tst_qqmlpropertymap
tst_qqmltypeloader
tst_qqmlvaluetypes
tst_qquickaccessible
tst_qquickanimations
tst_qquickdesignersupport
tst_qquickdrag
tst_qquickdraghandler
tst_qquickdroparea
tst_qquickflickable
tst_qquickgraphicsinfo
tst_qquickgridview
tst_qquickitem2
tst_qquickitemparticle
tst_qquicklayouts
tst_qquicklistview
...

QObjectPrivate...j)->metaObject

Description

TRUE

evaluated 26962 times by 10 tests

Evaluated by:

tst_examples
tst_qqmllistmodel
tst_qqmllistmodelworkerscript
tst_qqmlpropertymap
tst_qquickgridview
tst_qquicklistview
tst_qquickpathview
tst_qquickrepeater
tst_qquickvisualdatamodel
tst_signalspy

FALSE

evaluated 76186 times by 31 tests

Evaluated by:

tst_examples
tst_multipointtoucharea_interop
tst_qqmlcontext
tst_qqmlecmascript
tst_qqmlinstantiator
tst_qqmllocale
tst_qqmlproperty
tst_qqmltypeloader
tst_qqmlvaluetypes
tst_qquickaccessible
tst_qquickanimations
tst_qquickdesignersupport
tst_qquickdrag
tst_qquickdraghandler
tst_qquickdroparea
tst_qquickflickable
tst_qquickgraphicsinfo
tst_qquickgridview
tst_qquickitem2
tst_qquickitemparticle
tst_qquicklayouts
tst_qquicklistview
tst_qquickmousearea
tst_qquickopenglinfo
tst_qquickpathview
...

QObjectPrivate...j)->wasDeleted

Description

TRUE

never evaluated

FALSE

evaluated 76186 times by 31 tests

Evaluated by:

tst_examples
tst_multipointtoucharea_interop
tst_qqmlcontext
tst_qqmlecmascript
tst_qqmlinstantiator
tst_qqmllocale
tst_qqmlproperty
tst_qqmltypeloader
tst_qqmlvaluetypes
tst_qquickaccessible
tst_qquickanimations
tst_qquickdesignersupport
tst_qquickdrag
tst_qquickdraghandler
tst_qquickdroparea
tst_qquickflickable
tst_qquickgraphicsinfo
tst_qquickgridview
tst_qquickitem2
tst_qquickitemparticle
tst_qquicklayouts
tst_qquicklistview
tst_qquickmousearea
tst_qquickopenglinfo
tst_qquickpathview
...

0-103148

166

return nullptr;

executed 26962 times by 10 tests: return nullptr;

Executed by:

tst_examples
tst_qqmllistmodel
tst_qqmllistmodelworkerscript
tst_qqmlpropertymap
tst_qquickgridview
tst_qquicklistview
tst_qquickpathview
tst_qquickrepeater
tst_qquickvisualdatamodel
tst_signalspy

26962

167

168

Locker locker(this);

169

const QMetaObject *mo = obj->metaObject();

170

return QQmlMetaType::propertyCache(mo);

executed 76186 times by 31 tests: return QQmlMetaType::propertyCache(mo);

Executed by:

tst_examples
tst_multipointtoucharea_interop
tst_qqmlcontext
tst_qqmlecmascript
tst_qqmlinstantiator
tst_qqmllocale
tst_qqmlproperty
tst_qqmltypeloader
tst_qqmlvaluetypes
tst_qquickaccessible
tst_qquickanimations
tst_qquickdesignersupport
tst_qquickdrag
tst_qquickdraghandler
tst_qquickdroparea
tst_qquickflickable
tst_qquickgraphicsinfo
tst_qquickgridview
tst_qquickitem2
tst_qquickitemparticle
tst_qquicklayouts
tst_qquicklistview
tst_qquickmousearea
tst_qquickopenglinfo
tst_qquickpathview
...

76186

}

/*!

Returns a QQmlPropertyCache for \a metaObject.

175

176

As the cache is persisted for the life of the engine, \a metaObject must be

177

a static "compile time" meta-object, or a meta-object that is otherwise known to

178

exist for the lifetime of the QQmlEngine.

179

180

The returned cache is not referenced, so if it is to be stored, call addref().

181

182

QQmlPropertyCache *QJSEnginePrivate::cache(const QMetaObject *metaObject)

183

{

184

Q_ASSERT(metaObject);

185

186

Locker locker(this);

187

return QQmlMetaType::propertyCache(metaObject);

executed 460881 times by 137 tests: return QQmlMetaType::propertyCache(metaObject);

Executed by:

tst_bindingdependencyapi
tst_drawingmodes
tst_examples
tst_flickableinterop
tst_multipointtoucharea_interop
tst_parserstress
tst_qjsengine
tst_qmlcachegen
tst_qmldiskcache
tst_qqmlapplicationengine
tst_qqmlbinding
tst_qqmlcomponent
tst_qqmlconnections
tst_qqmlconsole
tst_qqmlcontext
tst_qqmldebugjs
tst_qqmlecmascript
tst_qqmlenginecleanup
tst_qqmlenginedebugservice
tst_qqmlexpression
tst_qqmlfileselector
tst_qqmlimport
tst_qqmlincubator
tst_qqmlinfo
tst_qqmlinstantiator
...

460881

}

QT_END_NAMESPACE

#endif // QJSENGINE_P_H

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