PerfLog.h

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/*
 * PerfLog.h - Small performance logger
 *
 * Copyright (c) 2017-2018 LMMS Developers
 *
 * This file is part of LMMS - https://lmms.io
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program (see COPYING); if not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301 USA.
 *
 */
 
#ifndef LMMS_PERFLOG_H
#define LMMS_PERFLOG_H
 
#include <ctime>
#include <QString>
 
namespace lmms
{
 

class PerfTime
{
public:
    PerfTime();
    bool valid() const;
 
    clock_t real() const;
    clock_t user() const;
    clock_t system() const;
 
    static PerfTime now();
    static clock_t ticksPerSecond();
 
    friend PerfTime operator-(const PerfTime& lhs, const PerfTime& rhs);
private:
    clock_t m_real;
    clock_t m_user;
    clock_t m_system;
};

class PerfLogTimer
{
 public:
    PerfLogTimer(const QString& name);
    ~PerfLogTimer();
 
    void begin();
    void end();
 
 private:
    QString name;
    PerfTime begin_time;
};
 
 
} // namespace lmms
 
#endif // LMMS_PERFLOG_H