/* Copyright (C) 2014 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_INCLUDED_
#define _CHRONO_H_INCLUDED_
#include <time.h>
/** 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.
*
* If frozen is set this gives the 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 long nanos(bool frozen = false);
long micros(bool frozen = false);
long millis(bool frozen = false);
float secs(bool frozen = false);
/** Return the absolute value of the current origin */
long long amicros() const;
struct TimeSpec {
time_t tv_sec; /* Time in seconds */
long tv_nsec; /* And nanoseconds (< 10E9) */
};
private:
TimeSpec m_orig;
static TimeSpec o_now;
};
#endif /* _CHRONO_H_INCLUDED_ */