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81 lines
1.8 KiB
C++
81 lines
1.8 KiB
C++
/*
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* PerfLog.h - Small performance logger
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*
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* Copyright (c) 2017-2018 LMMS Developers
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*
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* This file is part of LMMS - https://lmms.io
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program (see COPYING); if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA.
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*
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*/
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#ifndef LMMS_PERFLOG_H
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#define LMMS_PERFLOG_H
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#include <ctime>
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#include <QString>
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namespace lmms
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{
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/// \brief CPU time point
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///
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/// Represents a point in CPU time (not wall-clock time) intended for measuring
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/// performance.
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class PerfTime
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{
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public:
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PerfTime();
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bool valid() const;
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clock_t real() const;
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clock_t user() const;
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clock_t system() const;
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static PerfTime now();
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static clock_t ticksPerSecond();
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friend PerfTime operator-(const PerfTime& lhs, const PerfTime& rhs);
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private:
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clock_t m_real;
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clock_t m_user;
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clock_t m_system;
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};
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/// \brief The PerfLog class
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///
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/// Measures time between construction and destruction and prints the result to
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/// stderr, along with \p name. Alternatively, call begin() and end() explicitly.
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class PerfLogTimer
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{
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public:
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PerfLogTimer(const QString& name);
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~PerfLogTimer();
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void begin();
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void end();
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private:
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QString name;
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PerfTime begin_time;
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};
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} // namespace lmms
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#endif // LMMS_PERFLOG_H
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