/* Copyright (C) 2016 J.F.Dockes
* 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.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef _CHRONO_H_
#define _CHRONO_H_
#include <chrono>
/** Easy interface to measuring time intervals */
class Chrono {
public:
/** Initialize, setting the origin time */
Chrono();
/** Re-store current time and return mS since init or last call */
long restart();
/** Re-store current time and return uS since init or last call */
long urestart();
/** Snapshot current time to static storage */
static void refnow();
/** Return interval value in various units.
*
* Frozen means give time since the last refnow call (this is to
* allow for using one actual system call to get values from many
* chrono objects, like when examining timeouts in a queue
*/
long millis(bool frozen = false);
long micros(bool frozen = false);
float secs(bool frozen = false);
private:
typedef std::chrono::time_point<std::chrono::steady_clock> TimePoint;
TimePoint m_orig;
static TimePoint o_now;
};
#endif /* _CHRONO_H_ */