timer.h

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/**
 * \file
 * A timer with second, millisec, microsec or nanosec granularity.
 *
 * \author  Georg Hopp
 *
 * \copyright
 * Copyright © 2014 Georg Hopp
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 */

#ifndef __TR_TIMER_H__
#define __TR_TIMER_H__

#include <time.h>

#include "trbase.h"

#ifdef _WIN32
struct timespec {
    time_t tv_sec;
    long   tv_nsec;
};

#define CLOCK_REALTIME 1

int clock_gettime(int, struct timespec *tv);
#endif

typedef enum {
    TR_TBASE_NAN = 0,
    TR_TBASE_MIC,
    TR_TBASE_MIL,
    TR_TBASE_SEC
} TR_eTimeoutBase;

TR_CLASS(TR_Timer) {
    int             sec;
    int             nsec;
    TR_eTimeoutBase base;
    unsigned long   timeout;
};

TR_INSTANCE_INIT(TR_Timer);
TR_CLASSVARS_DECL(TR_Timer) {};

void TR_timerSet(TR_Timer, TR_eTimeoutBase, unsigned long);
unsigned long TR_timerGet(TR_Timer, unsigned long *); // 2nd arg gets amount of
                                                      // missed since last check.

#define TR_timerSetNan(timer, val) (TR_timerSet((timer), TR_TBASE_NAN, (val)))
#define TR_timerSetMic(timer, val) (TR_timerSet((timer), TR_TBASE_MIC, (val)))
#define TR_timerSetMil(timer, val) (TR_timerSet((timer), TR_TBASE_MIL, (val)))
#define TR_timerSetSec(timer, val) (TR_timerSet((timer), TR_TBASE_SEC, (val)))

#endif // __TR_TIMER_H__

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