common/include/QtTest/5.5.0/QtTest/private/qbenchmarkperfevents_p.h

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#ifndef QBENCHMARKPERFEVENTS_P_H
#define QBENCHMARKPERFEVENTS_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 <QtTest/private/qbenchmarkmeasurement_p.h>

QT_BEGIN_NAMESPACE

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

    static bool isAvailable();
    static QTest::QBenchmarkMetric metricForEvent(quint32 type, quint64 event_id);
    static void setCounter(const char *name);
    static void listCounters();
private:
    int fd;

    qint64 readValue();
};

QT_END_NAMESPACE

#endif // QBENCHMARKPERFEVENTS_P_H