surfaces/mackie/timer.h

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/*
 * Copyright (C) 2006-2007 John Anderson
 * Copyright (C) 2008-2015 Paul Davis <paul@linuxaudiosystems.com>
 * Copyright (C) 2014-2015 Robin Gareus <robin@gareus.org>
 *
 * 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; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
#ifndef timer_h
#define timer_h
 
#include <glib.h>
 
#include "types.h"
 
#include <cstdint>
 
namespace ArdourSurface { namespace MACKIE_NAMESPACE {
 
class Timer
{
public:
 
        Timer( bool shouldStart = true )
        {
                if ( shouldStart )
                        start();
        }
 
        unsigned long start()
        {
                _start = g_get_monotonic_time();
                return _start / 1000;
        }
 
        unsigned long stop()
        {
                _stop = g_get_monotonic_time();
                return elapsed();
        }
 
        unsigned long elapsed() const
        {
                if ( running )
                {
                        uint64_t now = g_get_monotonic_time();
                        return (now - _start) / 1000;
                }
                else
                {
                        return (_stop - _start) / 1000;
                }
        }
 
        unsigned long restart()
        {
                unsigned long retval = stop();
                start();
                return retval;
        }
 
private:
        uint64_t _start;
        uint64_t _stop;
        bool running;
};
 
} // Mackie namespace
} // ArdourSurface namespace
 
#endif