/*-------------------------------------------------------------------------- Copyright 1999,2001, Dan Kegel http://www.kegel.com/ Copyright 2003 Ixia http://www.ixiacom.com/ See the file COPYING This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.  This library 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA--------------------------------------------------------------------------*//*-------------------------------------------------------------------------- Portable clock functions.--------------------------------------------------------------------------*/#ifndef rn_eclock_h#define rn_eclock_h#include <time.h>#include <sys/time.h>#include <unistd.h>/* FIXME: prefix identifiers declared by this file with rn_ *//*-------------------------------------------------------------------------- Get current time, in clock ticks. Return type is int.--------------------------------------------------------------------------*/#define eclock_HERTZ 1000#define eclock_TICKSPERUSEC 1000extern struct timeval eclock_timeval;#define eclock() (gettimeofday(&eclock_timeval, NULL), \	((int)((eclock_timeval.tv_sec * eclock_HERTZ) + (eclock_timeval.tv_usec / eclock_TICKSPERUSEC))))/*-------------------------------------------------------------------------- Get number of clock ticks per second, in hertz.  This evaluates to a  system call, so call it just once at the start of the program. Return type is int.--------------------------------------------------------------------------*/#define eclock_hertz() eclock_HERTZ/*-------------------------------------------------------------------------- Safe way to compare to eclock() values to see which is after the other. Assumes the largest interval to be compared is one half the maximum representable in a long. Returns true if time a is after time b.--------------------------------------------------------------------------*/#define eclock_after(a, b) (((long)((a)-(b))) > 0)/*inline bool eclock_after(clock_t a, clock_t b){	long diff = (long) (a - b);	//DPRINT(("eclock_after(%d, %d): diff %d\n", a, b, diff));	return (diff > 0);}*//*-------------------------------------------------------------------------- Safe way to compare to eclock() values to see which is after the other. Assumes the largest interval to be compared is one half the maximum representable in a long. Returns true if time a is before time b.--------------------------------------------------------------------------*/#define eclock_before(a, b) (((long)((a)-(b))) < 0)/*inline bool eclock_before(clock_t a, clock_t b){	long diff = (long) (a - b);	//DPRINT(("eclock_before(%d, %d): diff %d\n", a, b, diff));	return (diff < 0);}*/#endif