src/common/timers.h

/*****************************************************************************\
 *  timers.h - timing functions
 *****************************************************************************
 *  Copyright (C) 2002 The Regents of the University of California.
 *  Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
 *  Written by Morris Jette <jette1@llnl.gov> and Kevin Tew <tew1@llnl.gov> 
 *  UCRL-CODE-226842.
 *  
 *  This file is part of SLURM, a resource management program.
 *  For details, see <http://www.llnl.gov/linux/slurm/>.
 *  
 *  SLURM 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.
 *
 *  In addition, as a special exception, the copyright holders give permission 
 *  to link the code of portions of this program with the OpenSSL library under
 *  certain conditions as described in each individual source file, and 
 *  distribute linked combinations including the two. You must obey the GNU 
 *  General Public License in all respects for all of the code used other than 
 *  OpenSSL. If you modify file(s) with this exception, you may extend this 
 *  exception to your version of the file(s), but you are not obligated to do 
 *  so. If you do not wish to do so, delete this exception statement from your
 *  version.  If you delete this exception statement from all source files in 
 *  the program, then also delete it here.
 *  
 *  SLURM 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 SLURM; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA.
\*****************************************************************************/

#ifndef _HAVE_TIMERS_H
#define _HAVE_TIMERS_H

#include <sys/time.h>

#define DEF_TIMERS	struct timeval tv1, tv2; char tv_str[20]
#define START_TIMER	gettimeofday(&tv1, NULL)
#define END_TIMER	gettimeofday(&tv2, NULL); \
			diff_tv_str(&tv1, &tv2, tv_str, 20, NULL)
#define END_TIMER2(from) gettimeofday(&tv2, NULL); \
			diff_tv_str(&tv1, &tv2, tv_str, 20, from)
#define DELTA_TIMER	diff_tv(&tv1, &tv2)
#define TIME_STR 	tv_str

/*
 * diff_tv_str - build a string showing the time difference between two times
 * IN tv1 - start of event
 * IN tv2 - end of event
 * OUT tv_str - place to put delta time in format "usec=%ld"
 * IN len_tv_str - size of tv_str in bytes
 */
extern inline void diff_tv_str(struct timeval *tv1,struct timeval *tv2,
                char *tv_str, int len_tv_str, char *from);

/*
 * diff_tv - return the difference between two times
 * IN tv1 - start of event
 * IN tv2 - end of event
 * RET time in micro-seconds
 */
inline long diff_tv(struct timeval *tv1, struct timeval *tv2);

#endif