qbenchmarkevent.cpp

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#include <QtTest/private/qbenchmarkevent_p.h>
#include <QtTest/private/qbenchmark_p.h>
#include <QtTest/private/qbenchmarkmetric_p.h>
#include <qdebug.h>
 
QT_BEGIN_NAMESPACE
 
QBenchmarkEvent::QBenchmarkEvent() = default;
 
QBenchmarkEvent::~QBenchmarkEvent() = default;
 
void QBenchmarkEvent::start()
{
    eventCounter = 0;
    QAbstractEventDispatcher::instance()->installNativeEventFilter(this);
}
 
void QBenchmarkEvent::updateMeasurement()
{
    QAbstractEventDispatcher::instance()->removeNativeEventFilter(this);
    accumulator.update(qreal(eventCounter));
    eventCounter = 0;
    QAbstractEventDispatcher::instance()->installNativeEventFilter(this);
}
 
QList<QBenchmarkMeasurerBase::Measurement> QBenchmarkEvent::stop()
{
    QAbstractEventDispatcher::instance()->removeNativeEventFilter(this);
    return { { accumulator.total(),
               accumulator.variance() / QBenchmarkTestMethodData::current->measurementBlockSize,
               QTest::Events } };
}
 
// It's very tempting to simply reject a measurement if 0 events
// where counted, however that is a possible situation and returning
// false here will create a infinite loop. Do not change this.
bool QBenchmarkEvent::isMeasurementAccepted(QBenchmarkMeasurerBase::Measurement measurement)
{
    Q_UNUSED(measurement);
    return true;
}
 
int QBenchmarkEvent::adjustIterationCount(int suggestion)
{
    return suggestion;
}
 
int QBenchmarkEvent::adjustMedianCount(int suggestion)
{
    Q_UNUSED(suggestion);
    return 1;
}
 
// This could be done in a much better way, this is just the beginning.
bool QBenchmarkEvent::nativeEventFilter(const QByteArray &eventType, void *message, qintptr *result)
{
    Q_UNUSED(eventType);
    Q_UNUSED(message);
    Q_UNUSED(result);
 
    eventCounter++;
    return false;
}
 
QT_END_NAMESPACE