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/****************************************************************************
**
** Copyright (C) 2022 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:COMM$
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** $QT_END_LICENSE$
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
******************************************************************************/
#ifndef QELAPSEDTIMER_H
#define QELAPSEDTIMER_H
#include <QtCore/qglobal.h>
QT_BEGIN_NAMESPACE
class Q_CORE_EXPORT QElapsedTimer
{
public:
enum ClockType {
SystemTime,
MonotonicClock,
TickCounter,
MachAbsoluteTime,
PerformanceCounter
};
constexpr QElapsedTimer()
: t1(Q_INT64_C(0x8000000000000000)),
t2(Q_INT64_C(0x8000000000000000))
{
}
static ClockType clockType() noexcept;
static bool isMonotonic() noexcept;
void start() noexcept;
qint64 restart() noexcept;
void invalidate() noexcept;
bool isValid() const noexcept;
qint64 nsecsElapsed() const noexcept;
qint64 elapsed() const noexcept;
bool hasExpired(qint64 timeout) const noexcept;
qint64 msecsSinceReference() const noexcept;
qint64 msecsTo(const QElapsedTimer &other) const noexcept;
qint64 secsTo(const QElapsedTimer &other) const noexcept;
friend bool operator==(const QElapsedTimer &lhs, const QElapsedTimer &rhs) noexcept
{ return lhs.t1 == rhs.t1 && lhs.t2 == rhs.t2; }
friend bool operator!=(const QElapsedTimer &lhs, const QElapsedTimer &rhs) noexcept
{ return !(lhs == rhs); }
friend bool Q_CORE_EXPORT operator<(const QElapsedTimer &lhs, const QElapsedTimer &rhs) noexcept;
private:
qint64 t1;
qint64 t2;
};
QT_END_NAMESPACE
#endif // QELAPSEDTIMER_H
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