qt5base-lts/src/testlib/qbenchmarkmeasurement_p.h

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#ifndef QBENCHMARKMEASUREMENT_P_H
#define QBENCHMARKMEASUREMENT_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include <QtCore/qelapsedtimer.h>
#ifdef HAVE_TICK_COUNTER
#include "3rdparty/cycle_p.h"
#endif
#include "qbenchmark.h"

QT_BEGIN_NAMESPACE

class QBenchmarkMeasurerBase
{
public:
    virtual ~QBenchmarkMeasurerBase(){};
    virtual void init() {};
    virtual void start() = 0;
    virtual qint64 checkpoint() = 0;
    virtual qint64 stop() = 0;
    virtual bool isMeasurementAccepted(qint64 measurement) = 0;
    virtual int adjustIterationCount(int suggestion) = 0;
    virtual int adjustMedianCount(int suggestion) = 0;
    virtual bool repeatCount() { return 1; }
    virtual bool needsWarmupIteration() { return false; }
    virtual QTest::QBenchmarkMetric metricType() = 0;
};

class QBenchmarkTimeMeasurer : public QBenchmarkMeasurerBase
{
public:
    void start();
    qint64 checkpoint();
    qint64 stop();
    bool isMeasurementAccepted(qint64 measurement);
    int adjustIterationCount(int sugestion);
    int adjustMedianCount(int suggestion);
    bool needsWarmupIteration();
    QTest::QBenchmarkMetric metricType();
private:
    QElapsedTimer time;
};

#ifdef HAVE_TICK_COUNTER // defined in 3rdparty/cycle_p.h

class QBenchmarkTickMeasurer : public QBenchmarkMeasurerBase
{
public:
    void start();
    qint64 checkpoint();
    qint64 stop();
    bool isMeasurementAccepted(qint64 measurement);
    int adjustIterationCount(int);
    int adjustMedianCount(int suggestion);
    bool needsWarmupIteration();
    QTest::QBenchmarkMetric metricType();
private:
    CycleCounterTicks startTicks;
};

#endif

QT_END_NAMESPACE

#endif // QBENCHMARKMEASUREMENT_P_H