qqmldelayedcallqueue_p.h

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#ifndef QQMLDELAYEDCALLQUEUE_P_H
#define QQMLDELAYEDCALLQUEUE_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/qglobal.h>
#include <QtCore/qobject.h>
#include <QtCore/qmetaobject.h>
#include <QtCore/qmetatype.h>
#include <private/qqmlguard_p.h>
#include <private/qv4context_p.h>
 
QT_BEGIN_NAMESPACE
 
class QQmlV4Function;
 
class QQmlDelayedCallQueue : public QObject
{
    Q_OBJECT
public:
    QQmlDelayedCallQueue();
    ~QQmlDelayedCallQueue() override;
 
    void init(QV4::ExecutionEngine *);
 
    static QV4::ReturnedValue addUniquelyAndExecuteLater(QV4::ExecutionEngine *engine,
            QQmlV4Function *args);
 
public Q_SLOTS:
    void ticked();
 
private:
    struct DelayedFunctionCall
    {
        DelayedFunctionCall() {}
        DelayedFunctionCall(QV4::PersistentValue function)
            : m_function(function), m_guarded(false) { }
 
        void execute(QV4::ExecutionEngine *engine) const;
 
        QV4::PersistentValue m_function;
        QV4::PersistentValue m_args;
        QQmlGuard<QObject> m_objectGuard;
        bool m_guarded;
    };
 
    void storeAnyArguments(DelayedFunctionCall& dfc, QQmlV4Function *args, int offset, QV4::ExecutionEngine *engine);
    void executeAllExpired_Later();
 
    QV4::ExecutionEngine *m_engine;
    QVector<DelayedFunctionCall> m_delayedFunctionCalls;
    QMetaMethod m_tickedMethod;
    bool m_callbackOutstanding;
};
 
QT_END_NAMESPACE
 
#endif // QQMLDELAYEDCALLQUEUE_P_H