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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 QTIMERINFO_UNIX_P_H
#define QTIMERINFO_UNIX_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/qglobal_p.h>
#include "qabstracteventdispatcher.h"
#include <sys/time.h> // struct timespec
#include <chrono>
QT_BEGIN_NAMESPACE
// internal timer info
struct QTimerInfo
{
using Duration = QAbstractEventDispatcher::Duration;
using TimePoint = std::chrono::time_point<std::chrono::steady_clock, Duration>;
QTimerInfo(Qt::TimerId timerId, Duration interval, Qt::TimerType type, QObject *obj)
: interval(interval), id(timerId), timerType(type), obj(obj)
{
}
TimePoint timeout = {}; // - when to actually fire
Duration interval = Duration{-1}; // - timer interval
Qt::TimerId id = Qt::TimerId::Invalid; // - timer identifier
Qt::TimerType timerType; // - timer type
QObject *obj = nullptr; // - object to receive event
QTimerInfo **activateRef = nullptr; // - ref from activateTimers
};
class Q_CORE_EXPORT QTimerInfoList
{
public:
using Duration = QAbstractEventDispatcher::Duration;
using TimerInfo = QAbstractEventDispatcher::TimerInfoV2;
QTimerInfoList();
mutable std::chrono::steady_clock::time_point currentTime;
std::optional<Duration> timerWait();
void timerInsert(QTimerInfo *);
Duration remainingDuration(Qt::TimerId timerId) const;
void registerTimer(Qt::TimerId timerId, Duration interval,
Qt::TimerType timerType, QObject *object);
bool unregisterTimer(Qt::TimerId timerId);
bool unregisterTimers(QObject *object);
QList<TimerInfo> registeredTimers(QObject *object) const;
int activateTimers();
bool hasPendingTimers();
void clearTimers()
{
qDeleteAll(timers);
timers.clear();
}
bool isEmpty() const { return timers.empty(); }
qsizetype size() const { return timers.size(); }
auto findTimerById(Qt::TimerId timerId) const
{
auto matchesId = [timerId](const auto &t) { return t->id == timerId; };
return std::find_if(timers.cbegin(), timers.cend(), matchesId);
}
private:
std::chrono::steady_clock::time_point updateCurrentTime() const;
// state variables used by activateTimers()
QTimerInfo *firstTimerInfo = nullptr;
QList<QTimerInfo *> timers;
};
QT_END_NAMESPACE
#endif // QTIMERINFO_UNIX_P_H
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