472 lines
18 KiB
C
472 lines
18 KiB
C
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/****************************************************************************
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**
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** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
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** Copyright (C) 2013 Olivier Goffart <ogoffart@woboq.com>
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** Contact: http://www.qt-project.org/legal
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**
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** This file is part of the QtCore module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Digia. For licensing terms and
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** conditions see http://qt.digia.com/licensing. For further information
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** use the contact form at http://qt.digia.com/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Digia gives you certain additional
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** rights. These rights are described in the Digia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef QOBJECT_P_H
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#define QOBJECT_P_H
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//
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// W A R N I N G
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// -------------
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//
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// This file is not part of the Qt API. It exists for the convenience
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// of qapplication_*.cpp, qwidget*.cpp and qfiledialog.cpp. This header
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// file may change from version to version without notice, or even be removed.
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//
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// We mean it.
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//
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#include "QtCore/qobject.h"
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#include "QtCore/qpointer.h"
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#include "QtCore/qsharedpointer.h"
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#include "QtCore/qcoreevent.h"
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#include "QtCore/qlist.h"
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#include "QtCore/qvector.h"
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#include "QtCore/qvariant.h"
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#include "QtCore/qreadwritelock.h"
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QT_BEGIN_NAMESPACE
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class QVariant;
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class QThreadData;
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class QObjectConnectionListVector;
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namespace QtSharedPointer {
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struct ExternalRefCountData;
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}
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/* for Qt Test */
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struct QSignalSpyCallbackSet {
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typedef void (*BeginCallback)(QObject *caller, int signal_or_method_index, void **argv);
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typedef void (*EndCallback)(QObject *caller, int signal_or_method_index);
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BeginCallback signal_begin_callback,
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slot_begin_callback;
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EndCallback signal_end_callback,
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slot_end_callback;
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};
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void Q_CORE_EXPORT qt_register_signal_spy_callbacks(const QSignalSpyCallbackSet &callback_set);
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extern QSignalSpyCallbackSet Q_CORE_EXPORT qt_signal_spy_callback_set;
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enum { QObjectPrivateVersion = QT_VERSION };
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class Q_CORE_EXPORT QAbstractDeclarativeData
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{
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public:
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static void (*destroyed)(QAbstractDeclarativeData *, QObject *);
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static void (*destroyed_qml1)(QAbstractDeclarativeData *, QObject *);
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static void (*parentChanged)(QAbstractDeclarativeData *, QObject *, QObject *);
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static void (*signalEmitted)(QAbstractDeclarativeData *, QObject *, int, void **);
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static int (*receivers)(QAbstractDeclarativeData *, const QObject *, int);
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static bool (*isSignalConnected)(QAbstractDeclarativeData *, const QObject *, int);
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};
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// This is an implementation of QAbstractDeclarativeData that is identical with
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// the implementation in QtDeclarative and QtQml for the first bit
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struct QAbstractDeclarativeDataImpl : public QAbstractDeclarativeData {
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quint32 ownedByQml1: 1;
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quint32 unused: 31;
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};
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class Q_CORE_EXPORT QObjectPrivate : public QObjectData
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{
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Q_DECLARE_PUBLIC(QObject)
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public:
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struct ExtraData {
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ExtraData() {}
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#ifndef QT_NO_USERDATA
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QVector<QObjectUserData *> userData;
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#endif
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QList<QByteArray> propertyNames;
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QList<QVariant> propertyValues;
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QVector<int> runningTimers;
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QList<QPointer<QObject> > eventFilters;
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QString objectName;
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};
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typedef void (*StaticMetaCallFunction)(QObject *, QMetaObject::Call, int, void **);
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struct Connection {
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QObject *sender;
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QObject *receiver;
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union {
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StaticMetaCallFunction callFunction;
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QtPrivate::QSlotObjectBase *slotObj;
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};
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// The next pointer for the singly-linked ConnectionList
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Connection *nextConnectionList;
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//senders linked list
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Connection *next;
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Connection **prev;
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QAtomicPointer<const int> argumentTypes;
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QAtomicInt ref_;
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ushort method_offset;
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ushort method_relative;
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uint signal_index : 27; // In signal range (see QObjectPrivate::signalIndex())
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ushort connectionType : 3; // 0 == auto, 1 == direct, 2 == queued, 4 == blocking
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ushort isSlotObject : 1;
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ushort ownArgumentTypes : 1;
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Connection() : nextConnectionList(0), ref_(2), ownArgumentTypes(true)
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{
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//ref_ is 2 for the use in the internal lists, and for the use in QMetaObject::Connection
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}
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~Connection();
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int method() const
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{
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return method_offset + method_relative;
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}
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void ref()
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{
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ref_.ref();
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}
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void deref()
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{
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if (!ref_.deref()) {
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Q_ASSERT(!receiver);
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delete this;
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}
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}
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};
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// ConnectionList is a singly-linked list
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struct ConnectionList {
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ConnectionList() : first(0), last(0) {}
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Connection *first;
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Connection *last;
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};
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struct Sender {
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QObject *sender;
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int signal;
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int ref;
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};
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QObjectPrivate(int version = QObjectPrivateVersion);
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virtual ~QObjectPrivate();
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void deleteChildren();
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void setParent_helper(QObject *);
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void moveToThread_helper();
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void setThreadData_helper(QThreadData *currentData, QThreadData *targetData);
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void _q_reregisterTimers(void *pointer);
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bool isSender(const QObject *receiver, const char *signal) const;
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QObjectList receiverList(const char *signal) const;
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QObjectList senderList() const;
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void addConnection(int signal, Connection *c);
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void cleanConnectionLists();
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static inline Sender *setCurrentSender(QObject *receiver,
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Sender *sender);
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static inline void resetCurrentSender(QObject *receiver,
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Sender *currentSender,
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Sender *previousSender);
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static QObjectPrivate *get(QObject *o)
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{
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return o->d_func();
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}
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int signalIndex(const char *signalName, const QMetaObject **meta = 0) const;
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inline bool isSignalConnected(uint signalIdx) const;
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// To allow abitrary objects to call connectNotify()/disconnectNotify() without making
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// the API public in QObject. This is used by QQmlNotifierEndpoint.
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inline void connectNotify(const QMetaMethod &signal);
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inline void disconnectNotify(const QMetaMethod &signal);
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template <typename Func1, typename Func2>
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static inline QMetaObject::Connection connect(const typename QtPrivate::FunctionPointer<Func1>::Object *sender, Func1 signal,
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const typename QtPrivate::FunctionPointer<Func2>::Object *receiverPrivate, Func2 slot,
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Qt::ConnectionType type = Qt::AutoConnection);
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template <typename Func1, typename Func2>
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static inline bool disconnect(const typename QtPrivate::FunctionPointer<Func1>::Object *sender, Func1 signal,
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const typename QtPrivate::FunctionPointer<Func2>::Object *receiverPrivate, Func2 slot);
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static QMetaObject::Connection connectImpl(const QObject *sender, int signal_index,
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const QObject *receiver, void **slot,
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QtPrivate::QSlotObjectBase *slotObj, Qt::ConnectionType type,
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const int *types, const QMetaObject *senderMetaObject);
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static QMetaObject::Connection connect(const QObject *sender, int signal_index, QtPrivate::QSlotObjectBase *slotObj, Qt::ConnectionType type);
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static bool disconnect(const QObject *sender, int signal_index, void **slot);
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public:
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ExtraData *extraData; // extra data set by the user
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QThreadData *threadData; // id of the thread that owns the object
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QObjectConnectionListVector *connectionLists;
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Connection *senders; // linked list of connections connected to this object
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Sender *currentSender; // object currently activating the object
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mutable quint32 connectedSignals[2];
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union {
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QObject *currentChildBeingDeleted;
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QAbstractDeclarativeData *declarativeData; //extra data used by the declarative module
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};
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// these objects are all used to indicate that a QObject was deleted
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// plus QPointer, which keeps a separate list
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QAtomicPointer<QtSharedPointer::ExternalRefCountData> sharedRefcount;
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};
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/*! \internal
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Returns \c true if the signal with index \a signal_index from object \a sender is connected.
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Signals with indices above a certain range are always considered connected (see connectedSignals
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in QObjectPrivate).
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\a signal_index must be the index returned by QObjectPrivate::signalIndex;
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*/
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inline bool QObjectPrivate::isSignalConnected(uint signal_index) const
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{
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return signal_index >= sizeof(connectedSignals) * 8
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|| (connectedSignals[signal_index >> 5] & (1 << (signal_index & 0x1f))
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|| (declarativeData && QAbstractDeclarativeData::isSignalConnected
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&& QAbstractDeclarativeData::isSignalConnected(declarativeData, q_func(), signal_index)));
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}
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inline QObjectPrivate::Sender *QObjectPrivate::setCurrentSender(QObject *receiver,
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Sender *sender)
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{
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Sender *previousSender = receiver->d_func()->currentSender;
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receiver->d_func()->currentSender = sender;
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return previousSender;
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}
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inline void QObjectPrivate::resetCurrentSender(QObject *receiver,
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Sender *currentSender,
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Sender *previousSender)
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{
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// ref is set to zero when this object is deleted during the metacall
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if (currentSender->ref == 1)
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receiver->d_func()->currentSender = previousSender;
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// if we've recursed, we need to tell the caller about the objects deletion
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if (previousSender)
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previousSender->ref = currentSender->ref;
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}
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inline void QObjectPrivate::connectNotify(const QMetaMethod &signal)
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{
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q_ptr->connectNotify(signal);
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}
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inline void QObjectPrivate::disconnectNotify(const QMetaMethod &signal)
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{
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q_ptr->disconnectNotify(signal);
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}
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namespace QtPrivate {
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template<typename Func, typename Args, typename R> class QPrivateSlotObject : public QSlotObjectBase
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{
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typedef QtPrivate::FunctionPointer<Func> FuncType;
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Func function;
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static void impl(int which, QSlotObjectBase *this_, QObject *r, void **a, bool *ret)
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{
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switch (which) {
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case Destroy:
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delete static_cast<QPrivateSlotObject *>(this_);
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break;
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case Call:
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FuncType::template call<Args, R>(static_cast<QPrivateSlotObject *>(this_)->function,
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static_cast<typename FuncType::Object *>(QObjectPrivate::get(r)), a);
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break;
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case Compare:
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*ret = *reinterpret_cast<Func *>(a) == static_cast<QPrivateSlotObject *>(this_)->function;
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break;
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case NumOperations:
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;
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}
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}
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public:
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explicit QPrivateSlotObject(Func f) : QSlotObjectBase(&impl), function(f) {}
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};
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} //namespace QtPrivate
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template <typename Func1, typename Func2>
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inline QMetaObject::Connection QObjectPrivate::connect(const typename QtPrivate::FunctionPointer<Func1>::Object *sender, Func1 signal,
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const typename QtPrivate::FunctionPointer<Func2>::Object *receiverPrivate, Func2 slot,
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Qt::ConnectionType type)
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{
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typedef QtPrivate::FunctionPointer<Func1> SignalType;
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typedef QtPrivate::FunctionPointer<Func2> SlotType;
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Q_STATIC_ASSERT_X(QtPrivate::HasQ_OBJECT_Macro<typename SignalType::Object>::Value,
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"No Q_OBJECT in the class with the signal");
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//compilation error if the arguments does not match.
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Q_STATIC_ASSERT_X(int(SignalType::ArgumentCount) >= int(SlotType::ArgumentCount),
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"The slot requires more arguments than the signal provides.");
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Q_STATIC_ASSERT_X((QtPrivate::CheckCompatibleArguments<typename SignalType::Arguments, typename SlotType::Arguments>::value),
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"Signal and slot arguments are not compatible.");
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Q_STATIC_ASSERT_X((QtPrivate::AreArgumentsCompatible<typename SlotType::ReturnType, typename SignalType::ReturnType>::value),
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"Return type of the slot is not compatible with the return type of the signal.");
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const int *types = 0;
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if (type == Qt::QueuedConnection || type == Qt::BlockingQueuedConnection)
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types = QtPrivate::ConnectionTypes<typename SignalType::Arguments>::types();
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return QObject::connectImpl(sender, reinterpret_cast<void **>(&signal),
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receiverPrivate->q_ptr, reinterpret_cast<void **>(&slot),
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new QtPrivate::QPrivateSlotObject<Func2, typename QtPrivate::List_Left<typename SignalType::Arguments, SlotType::ArgumentCount>::Value,
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typename SignalType::ReturnType>(slot),
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type, types, &SignalType::Object::staticMetaObject);
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}
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template <typename Func1, typename Func2>
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bool QObjectPrivate::disconnect(const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal,
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const typename QtPrivate::FunctionPointer< Func2 >::Object *receiverPrivate, Func2 slot)
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{
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typedef QtPrivate::FunctionPointer<Func1> SignalType;
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|
|
typedef QtPrivate::FunctionPointer<Func2> SlotType;
|
||
|
|
Q_STATIC_ASSERT_X(QtPrivate::HasQ_OBJECT_Macro<typename SignalType::Object>::Value,
|
||
|
|
"No Q_OBJECT in the class with the signal");
|
||
|
|
//compilation error if the arguments does not match.
|
||
|
|
Q_STATIC_ASSERT_X((QtPrivate::CheckCompatibleArguments<typename SignalType::Arguments, typename SlotType::Arguments>::value),
|
||
|
|
"Signal and slot arguments are not compatible.");
|
||
|
|
return QObject::disconnectImpl(sender, reinterpret_cast<void **>(&signal),
|
||
|
|
receiverPrivate->q_ptr, reinterpret_cast<void **>(&slot),
|
||
|
|
&SignalType::Object::staticMetaObject);
|
||
|
|
}
|
||
|
|
|
||
|
|
Q_DECLARE_TYPEINFO(QObjectPrivate::Connection, Q_MOVABLE_TYPE);
|
||
|
|
Q_DECLARE_TYPEINFO(QObjectPrivate::Sender, Q_MOVABLE_TYPE);
|
||
|
|
|
||
|
|
class QSemaphore;
|
||
|
|
class Q_CORE_EXPORT QMetaCallEvent : public QEvent
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
QMetaCallEvent(ushort method_offset, ushort method_relative, QObjectPrivate::StaticMetaCallFunction callFunction, const QObject *sender, int signalId,
|
||
|
|
int nargs = 0, int *types = 0, void **args = 0, QSemaphore *semaphore = 0);
|
||
|
|
/*! \internal
|
||
|
|
\a signalId is in the signal index range (see QObjectPrivate::signalIndex()).
|
||
|
|
*/
|
||
|
|
QMetaCallEvent(QtPrivate::QSlotObjectBase *slotObj, const QObject *sender, int signalId,
|
||
|
|
int nargs = 0, int *types = 0, void **args = 0, QSemaphore *semaphore = 0);
|
||
|
|
|
||
|
|
~QMetaCallEvent();
|
||
|
|
|
||
|
|
inline int id() const
|
||
|
|
{
|
||
|
|
return method_offset_ + method_relative_;
|
||
|
|
}
|
||
|
|
inline const QObject *sender() const
|
||
|
|
{
|
||
|
|
return sender_;
|
||
|
|
}
|
||
|
|
inline int signalId() const
|
||
|
|
{
|
||
|
|
return signalId_;
|
||
|
|
}
|
||
|
|
inline void **args() const
|
||
|
|
{
|
||
|
|
return args_;
|
||
|
|
}
|
||
|
|
|
||
|
|
virtual void placeMetaCall(QObject *object);
|
||
|
|
|
||
|
|
private:
|
||
|
|
QtPrivate::QSlotObjectBase *slotObj_;
|
||
|
|
const QObject *sender_;
|
||
|
|
int signalId_;
|
||
|
|
int nargs_;
|
||
|
|
int *types_;
|
||
|
|
void **args_;
|
||
|
|
QSemaphore *semaphore_;
|
||
|
|
QObjectPrivate::StaticMetaCallFunction callFunction_;
|
||
|
|
ushort method_offset_;
|
||
|
|
ushort method_relative_;
|
||
|
|
};
|
||
|
|
|
||
|
|
class QBoolBlocker
|
||
|
|
{
|
||
|
|
Q_DISABLE_COPY(QBoolBlocker)
|
||
|
|
public:
|
||
|
|
explicit inline QBoolBlocker(bool &b, bool value = true): block(b), reset(b)
|
||
|
|
{
|
||
|
|
block = value;
|
||
|
|
}
|
||
|
|
inline ~QBoolBlocker()
|
||
|
|
{
|
||
|
|
block = reset;
|
||
|
|
}
|
||
|
|
private:
|
||
|
|
bool █
|
||
|
|
bool reset;
|
||
|
|
};
|
||
|
|
|
||
|
|
void Q_CORE_EXPORT qDeleteInEventHandler(QObject *o);
|
||
|
|
|
||
|
|
struct QAbstractDynamicMetaObject;
|
||
|
|
struct Q_CORE_EXPORT QDynamicMetaObjectData {
|
||
|
|
virtual ~QDynamicMetaObjectData() {}
|
||
|
|
virtual void objectDestroyed(QObject *)
|
||
|
|
{
|
||
|
|
delete this;
|
||
|
|
}
|
||
|
|
|
||
|
|
virtual QAbstractDynamicMetaObject *toDynamicMetaObject(QObject *) = 0;
|
||
|
|
virtual int metaCall(QObject *, QMetaObject::Call, int _id, void **) = 0;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct Q_CORE_EXPORT QAbstractDynamicMetaObject : public QDynamicMetaObjectData, public QMetaObject {
|
||
|
|
virtual QAbstractDynamicMetaObject *toDynamicMetaObject(QObject *)
|
||
|
|
{
|
||
|
|
return this;
|
||
|
|
}
|
||
|
|
virtual int createProperty(const char *, const char *)
|
||
|
|
{
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
virtual int metaCall(QObject *, QMetaObject::Call c, int _id, void **a)
|
||
|
|
{
|
||
|
|
return metaCall(c, _id, a);
|
||
|
|
}
|
||
|
|
virtual int metaCall(QMetaObject::Call, int _id, void **)
|
||
|
|
{
|
||
|
|
return _id; // Compat overload
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
QT_END_NAMESPACE
|
||
|
|
|
||
|
|
#endif // QOBJECT_P_H
|