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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.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qqmlnotifier_p.h"
#include "qqmlproperty_p.h"
#include <QtCore/qdebug.h>
#include <private/qthread_p.h>
QT_BEGIN_NAMESPACE
typedef void (*Callback)(QQmlNotifierEndpoint *, void **);
void QQmlBoundSignal_callback(QQmlNotifierEndpoint *, void **);
void QQmlJavaScriptExpressionGuard_callback(QQmlNotifierEndpoint *, void **);
void QQmlVMEMetaObjectEndpoint_callback(QQmlNotifierEndpoint *, void **);
static Callback QQmlNotifier_callbacks[] = {
0,
QQmlBoundSignal_callback,
QQmlJavaScriptExpressionGuard_callback,
QQmlVMEMetaObjectEndpoint_callback
};
void QQmlNotifier::emitNotify(QQmlNotifierEndpoint *endpoint, void **a)
{
qintptr originalSenderPtr;
qintptr *disconnectWatch;
if (!endpoint->isNotifying()) {
originalSenderPtr = endpoint->senderPtr;
disconnectWatch = &originalSenderPtr;
endpoint->senderPtr = qintptr(disconnectWatch) | 0x1;
} else {
disconnectWatch = (qintptr *)(endpoint->senderPtr & ~0x1);
}
if (endpoint->next)
emitNotify(endpoint->next, a);
if (*disconnectWatch) {
Q_ASSERT(QQmlNotifier_callbacks[endpoint->callback]);
QQmlNotifier_callbacks[endpoint->callback](endpoint, a);
if (disconnectWatch == &originalSenderPtr && originalSenderPtr) {
// End of notifying, restore values
endpoint->senderPtr = originalSenderPtr;
}
}
}
/*! \internal
\a sourceSignal MUST be in the signal index range (see QObjectPrivate::signalIndex()).
This is different from QMetaMethod::methodIndex().
*/
void QQmlNotifierEndpoint::connect(QObject *source, int sourceSignal, QQmlEngine *engine)
{
disconnect();
Q_ASSERT(engine);
if (QObjectPrivate::get(source)->threadData->threadId !=
QObjectPrivate::get(engine)->threadData->threadId) {
QString sourceName;
QDebug(&sourceName) << source;
sourceName = sourceName.left(sourceName.length() - 1);
QString engineName;
QDebug(&engineName).nospace() << engine;
engineName = engineName.left(engineName.length() - 1);
qFatal("QQmlEngine: Illegal attempt to connect to %s that is in"
" a different thread than the QML engine %s.", qPrintable(sourceName),
qPrintable(engineName));
}
senderPtr = qintptr(source);
this->sourceSignal = sourceSignal;
QQmlPropertyPrivate::flushSignal(source, sourceSignal);
QQmlData *ddata = QQmlData::get(source, true);
ddata->addNotify(sourceSignal, this);
QObjectPrivate * const priv = QObjectPrivate::get(source);
priv->connectNotify(QMetaObjectPrivate::signal(source->metaObject(), sourceSignal));
}
QT_END_NAMESPACE
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