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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** 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 http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#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
};
Q_DECL_CONSTEXPR QElapsedTimer()
: t1(Q_INT64_C(0x8000000000000000)),
t2(Q_INT64_C(0x8000000000000000))
{
}
static ClockType clockType() Q_DECL_NOTHROW;
static bool isMonotonic() Q_DECL_NOTHROW;
void start() Q_DECL_NOTHROW;
qint64 restart() Q_DECL_NOTHROW;
void invalidate() Q_DECL_NOTHROW;
bool isValid() const Q_DECL_NOTHROW;
qint64 nsecsElapsed() const Q_DECL_NOTHROW;
qint64 elapsed() const Q_DECL_NOTHROW;
bool hasExpired(qint64 timeout) const Q_DECL_NOTHROW;
qint64 msecsSinceReference() const Q_DECL_NOTHROW;
qint64 msecsTo(const QElapsedTimer &other) const Q_DECL_NOTHROW;
qint64 secsTo(const QElapsedTimer &other) const Q_DECL_NOTHROW;
bool operator==(const QElapsedTimer &other) const Q_DECL_NOTHROW
{ return t1 == other.t1 && t2 == other.t2; }
bool operator!=(const QElapsedTimer &other) const Q_DECL_NOTHROW
{ return !(*this == other); }
friend bool Q_CORE_EXPORT operator<(const QElapsedTimer &v1, const QElapsedTimer &v2) Q_DECL_NOTHROW;
private:
qint64 t1;
qint64 t2;
};
QT_END_NAMESPACE
#endif // QELAPSEDTIMER_H
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