qeventdispatcher_win_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 QEVENTDISPATCHER_WIN_P_H
#define QEVENTDISPATCHER_WIN_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/qabstracteventdispatcher.h"
#include "QtCore/qt_windows.h"
#include "QtCore/qhash.h"
#include "QtCore/qatomic.h"
 
#include "qabstracteventdispatcher_p.h"
 
QT_BEGIN_NAMESPACE
 
class QEventDispatcherWin32Private;
 
// forward declaration
LRESULT QT_WIN_CALLBACK qt_internal_proc(HWND hwnd, UINT message, WPARAM wp, LPARAM lp);
 
class Q_CORE_EXPORT QEventDispatcherWin32 : public QAbstractEventDispatcherV2
{
    Q_OBJECT
    Q_DECLARE_PRIVATE(QEventDispatcherWin32)
 
public:
    explicit QEventDispatcherWin32(QObject *parent = nullptr);
    ~QEventDispatcherWin32();
 
    bool QT_ENSURE_STACK_ALIGNED_FOR_SSE processEvents(QEventLoop::ProcessEventsFlags flags) override;
 
    void registerSocketNotifier(QSocketNotifier *notifier) override;
    void unregisterSocketNotifier(QSocketNotifier *notifier) override;
 
    void registerTimer(Qt::TimerId timerId, Duration interval, Qt::TimerType timerType,
                       QObject *object) final;
    bool unregisterTimer(Qt::TimerId timerId) final;
    bool unregisterTimers(QObject *object) final;
    QList<TimerInfoV2> timersForObject(QObject *object) const final;
    Duration remainingTime(Qt::TimerId timerId) const final;
 
    void wakeUp() override;
    void interrupt() override;
 
    void startingUp() override;
    void closingDown() override;
 
    bool event(QEvent *e) override;
 
    HWND internalHwnd();
 
protected:
    QEventDispatcherWin32(QEventDispatcherWin32Private &dd, QObject *parent = nullptr);
    virtual void sendPostedEvents();
    void doUnregisterSocketNotifier(QSocketNotifier *notifier);
 
private:
    friend LRESULT QT_WIN_CALLBACK qt_internal_proc(HWND hwnd, UINT message, WPARAM wp, LPARAM lp);
};
 
struct QSockNot {
    QSocketNotifier *obj;
    qintptr fd;
};
typedef QHash<qintptr, QSockNot *> QSNDict;
 
struct QSockFd {
    long event;
    long mask;
    bool selected;
 
    explicit inline QSockFd(long ev = 0, long ma = 0) : event(ev), mask(ma), selected(false) { }
};
typedef QHash<qintptr, QSockFd> QSFDict;
 
struct WinTimerInfo {                           // internal timer info
    qint64 interval;                            // - in milliseconds
    quint64 timeout;                            // - when to actually fire
    QObject *dispatcher;
    QObject *obj;                               // - object to receive events
    int timerId;
    Qt::TimerType timerType;
    UINT fastTimerId;
    bool inTimerEvent;
    bool usesExtendedInterval;
    bool isSecondTimeout;
};
 
class QZeroTimerEvent : public QTimerEvent
{
public:
    explicit inline QZeroTimerEvent(int timerId)
        : QTimerEvent(timerId)
    { t = QEvent::ZeroTimerEvent; }
};
 
typedef QHash<int, WinTimerInfo*> WinTimerDict; // fast dict of timers
 
class Q_CORE_EXPORT QEventDispatcherWin32Private : public QAbstractEventDispatcherPrivate
{
    Q_DECLARE_PUBLIC(QEventDispatcherWin32)
public:
    QEventDispatcherWin32Private();
    ~QEventDispatcherWin32Private();
 
    QAtomicInt interrupt;
 
    // internal window handle used for socketnotifiers/timers/etc
    HWND internalHwnd;
 
    // for controlling when to send posted events
    UINT_PTR sendPostedEventsTimerId;
    QAtomicInt wakeUps;
    void startPostedEventsTimer();
 
    // timers
    WinTimerDict timerDict;
    void registerTimer(WinTimerInfo *t);
    void unregisterTimer(WinTimerInfo *t);
    void sendTimerEvent(int timerId);
 
    // socket notifiers
    QSNDict sn_read;
    QSNDict sn_write;
    QSNDict sn_except;
    QSFDict active_fd;
    bool activateNotifiersPosted;
    void postActivateSocketNotifiers();
    void doWsaAsyncSelect(qintptr socket, long event);
 
    bool closingDown = false;
 
    QList<MSG> queuedUserInputEvents;
    QList<MSG> queuedSocketEvents;
};
 
QT_END_NAMESPACE
 
#endif // QEVENTDISPATCHER_WIN_P_H