qwt_system_clock.cpp

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/******************************************************************************
 * Qwt Widget Library
 * Copyright (C) 1997   Josef Wilgen
 * Copyright (C) 2002   Uwe Rathmann
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the Qwt License, Version 1.0
 *****************************************************************************/
 
#include "qwt_system_clock.h"
#include <qelapsedtimer.h>
 
bool QwtSystemClock::isNull() const
{
    return m_timer.isValid();
}
 
void QwtSystemClock::start()
{
    m_timer.start();
}
 
double QwtSystemClock::restart()
{
    const qint64 nsecs = m_timer.restart();
    return nsecs / 1e6;
}
 
double QwtSystemClock::elapsed() const
{
    const qint64 nsecs = m_timer.nsecsElapsed();
    return nsecs / 1e6;
}