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/*
* Soft: Keepalived is a failover program for the LVS project
* <www.linuxvirtualserver.org>. It monitor & manipulate
* a loadbalanced server pool using multi-layer checks.
*
* Part: Timer manipulations.
*
* Version: $Id: timer.c,v 1.1.15 2007/09/15 04:07:41 acassen Exp $
*
* Author: Alexandre Cassen, <acassen@linux-vs.org>
*
* 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.
*
* 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.
*
* Copyright (C) 2001-2007 Alexandre Cassen, <acassen@freebox.fr>
*/
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include "timer.h"
/* time_now holds current time */
TIMEVAL time_now = { tv_sec: 0, tv_usec: 0 };
/* set a timer to a specific value */
TIMEVAL
timer_dup(TIMEVAL b)
{
TIMEVAL a;
TIMER_RESET(a);
a.tv_sec = b.tv_sec;
a.tv_usec = b.tv_usec;
return a;
}
/* timer compare */
int
timer_cmp(TIMEVAL a, TIMEVAL b)
{
if (a.tv_sec > b.tv_sec)
return 1;
if (a.tv_sec < b.tv_sec)
return -1;
if (a.tv_usec > b.tv_usec)
return 1;
if (a.tv_usec < b.tv_usec)
return -1;
return 0;
}
/* timer sub */
TIMEVAL
timer_sub(TIMEVAL a, TIMEVAL b)
{
TIMEVAL ret;
TIMER_RESET(ret);
ret.tv_usec = a.tv_usec - b.tv_usec;
ret.tv_sec = a.tv_sec - b.tv_sec;
if (ret.tv_usec < 0) {
ret.tv_usec += TIMER_HZ;
ret.tv_sec--;
}
return ret;
}
/* timer add */
TIMEVAL
timer_add_long(TIMEVAL a, long b)
{
TIMEVAL ret;
TIMER_RESET(ret);
ret.tv_usec = a.tv_usec + b % TIMER_HZ;
ret.tv_sec = a.tv_sec + b / TIMER_HZ;
if (ret.tv_usec >= TIMER_HZ) {
ret.tv_sec++;
ret.tv_usec -= TIMER_HZ;
}
return ret;
}
/* current time */
TIMEVAL
timer_now(void)
{
TIMEVAL curr_time;
int old_errno = errno;
/* init timer */
TIMER_RESET(curr_time);
gettimeofday(&curr_time, NULL);
errno = old_errno;
return curr_time;
}
/* sets and returns current time from system time */
TIMEVAL
set_time_now(void)
{
int old_errno = errno;
/* init timer */
TIMER_RESET(time_now);
gettimeofday(&time_now, NULL);
errno = old_errno;
return time_now;
}
/* timer sub from current time */
TIMEVAL
timer_sub_now(TIMEVAL a)
{
return timer_sub(time_now, a);
}
/* print timer value */
void
timer_dump(TIMEVAL a)
{
unsigned long timer;
timer = a.tv_sec * TIMER_HZ + a.tv_usec;
printf("=> %lu (usecs)\n", timer);
}
unsigned long
timer_tol(TIMEVAL a)
{
unsigned long timer;
timer = a.tv_sec * TIMER_HZ + a.tv_usec;
return timer;
}
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