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#ifndef QDEADLINETIMER_H
#define QDEADLINETIMER_H
#include <QtCore/qelapsedtimer.h>
#include <QtCore/qmetatype.h>
#include <QtCore/qnamespace.h>
#ifdef max
// un-pollute the namespace. We need std::numeric_limits::max() and std::chrono::duration::max()
# undef max
#endif
#include <limits>
#if QT_HAS_INCLUDE(<chrono>)
# include <chrono>
#endif
QT_BEGIN_NAMESPACE
class Q_CORE_EXPORT QDeadlineTimer
{
public:
enum ForeverConstant { Forever };
Q_DECL_CONSTEXPR QDeadlineTimer(Qt::TimerType type_ = Qt::CoarseTimer) Q_DECL_NOTHROW
: t1(0), t2(0), type(type_) {}
Q_DECL_CONSTEXPR QDeadlineTimer(ForeverConstant, Qt::TimerType type_ = Qt::CoarseTimer) Q_DECL_NOTHROW
: t1(std::numeric_limits<qint64>::max()), t2(0), type(type_) {}
explicit QDeadlineTimer(qint64 msecs, Qt::TimerType type = Qt::CoarseTimer) Q_DECL_NOTHROW;
void swap(QDeadlineTimer &other) Q_DECL_NOTHROW
{ qSwap(t1, other.t1); qSwap(t2, other.t2); qSwap(type, other.type); }
Q_DECL_CONSTEXPR bool isForever() const Q_DECL_NOTHROW
{ return t1 == (std::numeric_limits<qint64>::max)(); }
bool hasExpired() const Q_DECL_NOTHROW;
Qt::TimerType timerType() const Q_DECL_NOTHROW
{ return Qt::TimerType(type & 0xff); }
void setTimerType(Qt::TimerType type);
qint64 remainingTime() const Q_DECL_NOTHROW;
qint64 remainingTimeNSecs() const Q_DECL_NOTHROW;
void setRemainingTime(qint64 msecs, Qt::TimerType type = Qt::CoarseTimer) Q_DECL_NOTHROW;
void setPreciseRemainingTime(qint64 secs, qint64 nsecs = 0,
Qt::TimerType type = Qt::CoarseTimer) Q_DECL_NOTHROW;
qint64 deadline() const Q_DECL_NOTHROW Q_DECL_PURE_FUNCTION;
qint64 deadlineNSecs() const Q_DECL_NOTHROW Q_DECL_PURE_FUNCTION;
void setDeadline(qint64 msecs, Qt::TimerType timerType = Qt::CoarseTimer) Q_DECL_NOTHROW;
void setPreciseDeadline(qint64 secs, qint64 nsecs = 0,
Qt::TimerType type = Qt::CoarseTimer) Q_DECL_NOTHROW;
static QDeadlineTimer addNSecs(QDeadlineTimer dt, qint64 nsecs) Q_DECL_NOTHROW Q_DECL_PURE_FUNCTION;
static QDeadlineTimer current(Qt::TimerType timerType = Qt::CoarseTimer) Q_DECL_NOTHROW;
friend bool operator==(QDeadlineTimer d1, QDeadlineTimer d2) Q_DECL_NOTHROW
{ return d1.t1 == d2.t1 && d1.t2 == d2.t2; }
friend bool operator!=(QDeadlineTimer d1, QDeadlineTimer d2) Q_DECL_NOTHROW
{ return !(d1 == d2); }
friend bool operator<(QDeadlineTimer d1, QDeadlineTimer d2) Q_DECL_NOTHROW
{ return d1.t1 < d2.t1 || (d1.t1 == d2.t1 && d1.t2 < d2.t2); }
friend bool operator<=(QDeadlineTimer d1, QDeadlineTimer d2) Q_DECL_NOTHROW
{ return d1 == d2 || d1 < d2; }
friend bool operator>(QDeadlineTimer d1, QDeadlineTimer d2) Q_DECL_NOTHROW
{ return d2 < d1; }
friend bool operator>=(QDeadlineTimer d1, QDeadlineTimer d2) Q_DECL_NOTHROW
{ return !(d1 < d2); }
friend QDeadlineTimer operator+(QDeadlineTimer dt, qint64 msecs)
{ return QDeadlineTimer::addNSecs(dt, msecs * 1000 * 1000); }
friend QDeadlineTimer operator+(qint64 msecs, QDeadlineTimer dt)
{ return dt + msecs; }
friend QDeadlineTimer operator-(QDeadlineTimer dt, qint64 msecs)
{ return dt + (-msecs); }
friend qint64 operator-(QDeadlineTimer dt1, QDeadlineTimer dt2)
{ return (dt1.deadlineNSecs() - dt2.deadlineNSecs()) / (1000 * 1000); }
QDeadlineTimer &operator+=(qint64 msecs)
{ *this = *this + msecs; return *this; }
QDeadlineTimer &operator-=(qint64 msecs)
{ *this = *this + (-msecs); return *this; }
#if QT_HAS_INCLUDE(<chrono>) || defined(Q_QDOC)
template <class Clock, class Duration>
QDeadlineTimer(std::chrono::time_point<Clock, Duration> deadline_,
Qt::TimerType type_ = Qt::CoarseTimer) : t2(0)
{ setDeadline(deadline_, type_); }
template <class Clock, class Duration>
QDeadlineTimer &operator=(std::chrono::time_point<Clock, Duration> deadline_)
{ setDeadline(deadline_); return *this; }
template <class Clock, class Duration>
void setDeadline(std::chrono::time_point<Clock, Duration> deadline_,
Qt::TimerType type_ = Qt::CoarseTimer)
{ setRemainingTime(deadline_ == deadline_.max() ? Duration::max() : deadline_ - Clock::now(), type_); }
template <class Clock, class Duration = typename Clock::duration>
std::chrono::time_point<Clock, Duration> deadline() const
{
auto val = std::chrono::nanoseconds(rawRemainingTimeNSecs()) + Clock::now();
return std::chrono::time_point_cast<Duration>(val);
}
template <class Rep, class Period>
QDeadlineTimer(std::chrono::duration<Rep, Period> remaining, Qt::TimerType type_ = Qt::CoarseTimer)
: t2(0)
{ setRemainingTime(remaining, type_); }
template <class Rep, class Period>
QDeadlineTimer &operator=(std::chrono::duration<Rep, Period> remaining)
{ setRemainingTime(remaining); return *this; }
template <class Rep, class Period>
void setRemainingTime(std::chrono::duration<Rep, Period> remaining, Qt::TimerType type_ = Qt::CoarseTimer)
{
if (remaining == remaining.max())
*this = QDeadlineTimer(Forever, type_);
else
setPreciseRemainingTime(0, std::chrono::nanoseconds(remaining).count(), type_);
}
std::chrono::nanoseconds remainingTimeAsDuration() const Q_DECL_NOTHROW
{
if (isForever())
return std::chrono::nanoseconds::max();
qint64 nsecs = rawRemainingTimeNSecs();
if (nsecs <= 0)
return std::chrono::nanoseconds::zero();
return std::chrono::nanoseconds(nsecs);
}
template <class Rep, class Period>
friend QDeadlineTimer operator+(QDeadlineTimer dt, std::chrono::duration<Rep, Period> value)
{ return QDeadlineTimer::addNSecs(dt, std::chrono::duration_cast<std::chrono::nanoseconds>(value).count()); }
template <class Rep, class Period>
friend QDeadlineTimer operator+(std::chrono::duration<Rep, Period> value, QDeadlineTimer dt)
{ return dt + value; }
template <class Rep, class Period>
friend QDeadlineTimer operator+=(QDeadlineTimer &dt, std::chrono::duration<Rep, Period> value)
{ return dt = dt + value; }
#endif
private:
qint64 t1;
unsigned t2;
unsigned type;
qint64 rawRemainingTimeNSecs() const Q_DECL_NOTHROW;
};
Q_DECLARE_SHARED(QDeadlineTimer)
QT_END_NAMESPACE
Q_DECLARE_METATYPE(QDeadlineTimer)
#endif // QDEADLINETIMER_H