qt-everywhere-src-5.14.1/qtbase/src/corelib/kernel/qbasictimer.h

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#ifndef QBASICTIMER_H
#define QBASICTIMER_H

#include <QtCore/qglobal.h>
#include <QtCore/qnamespace.h>

QT_BEGIN_NAMESPACE


class QObject;

class Q_CORE_EXPORT QBasicTimer
{
    int id;
#if QT_VERSION >= QT_VERSION_CHECK(6,0,0)
    Q_DISABLE_COPY(QBasicTimer)
#elif QT_DEPRECATED_SINCE(5, 14)
public:
    // Just here to preserve BC, we can't remove them yet
    QT_DEPRECATED_X("copy-construction is unsupported; use move-construction instead")
    QBasicTimer(const QBasicTimer &);
    QT_DEPRECATED_X("copy-assignment is unsupported; use move-assignment instead")
    QBasicTimer &operator=(const QBasicTimer &);
#endif

public:
    constexpr QBasicTimer() noexcept : id{0} {}
    inline ~QBasicTimer() { if (id) stop(); }

    QBasicTimer(QBasicTimer &&other) noexcept
        : id{qExchange(other.id, 0)}
    {}

    QBasicTimer& operator=(QBasicTimer &&other) noexcept
    {
        QBasicTimer{std::move(other)}.swap(*this);
        return *this;
    }

    void swap(QBasicTimer &other) noexcept { qSwap(id, other.id); }

    bool isActive() const noexcept { return id != 0; }
    int timerId() const noexcept { return id; }

    void start(int msec, QObject *obj);
    void start(int msec, Qt::TimerType timerType, QObject *obj);
    void stop();
};
Q_DECLARE_TYPEINFO(QBasicTimer, Q_MOVABLE_TYPE);

inline void swap(QBasicTimer &lhs, QBasicTimer &rhs) noexcept { lhs.swap(rhs); }

QT_END_NAMESPACE

#endif // QBASICTIMER_H