qelapsedtimer.cpp

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#include "qelapsedtimer.h"

QT_BEGIN_NAMESPACE

static const qint64 invalidData = Q_INT64_C(0x8000000000000000);

void QElapsedTimer::invalidate()
{
     t1 = t2 = invalidData;
}

bool QElapsedTimer::isValid() const
{
    return t1 != invalidData && t2 != invalidData;
}

bool QElapsedTimer::hasExpired(qint64 timeout) const
{
    // if timeout is -1, quint64(timeout) is LLINT_MAX, so this will be
    // considered as never expired
    return quint64(elapsed()) > quint64(timeout);
}

QT_END_NAMESPACE