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/* Copyright (C) 2016 J.F.Dockes
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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
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* GNU 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 License
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* along with this program; if not, write to the
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* Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef _CHRONO_H_
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#define _CHRONO_H_
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#include <chrono>
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/** Easy interface to measuring time intervals */
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class Chrono {
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public:
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/** Initialize, setting the origin time */
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Chrono();
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/** Re-store current time and return mS since init or last call */
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long restart();
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/** Re-store current time and return uS since init or last call */
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long urestart();
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/** Snapshot current time to static storage */
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static void refnow();
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/** Return interval value in various units.
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*
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* Frozen means give time since the last refnow call (this is to
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* allow for using one actual system call to get values from many
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* chrono objects, like when examining timeouts in a queue
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*/
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long millis(bool frozen = false);
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long micros(bool frozen = false);
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float secs(bool frozen = false);
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private:
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typedef std::chrono::time_point<std::chrono::steady_clock> TimePoint;
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TimePoint m_orig;
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static TimePoint o_now;
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};
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#endif /* _CHRONO_H_ */
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