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/*
* $Id: timer.c,v 1.1.1.1 2005/06/13 16:47:29 bogdan_iancu Exp $
*
* Copyright (C) 2001-2003 FhG Fokus
*
* This file is part of openser, a free SIP server.
*
* openser 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
*
* openser 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
*
* History:
* --------
* 2003-03-19 replaced all the mallocs/frees w/ pkg_malloc/pkg_free (andrei)
* 2003-03-29 cleaning pkg_mallocs introduced (jiri)
*/
#include "timer.h"
#include "dprint.h"
#include "error.h"
#include "config.h"
#include "mem/mem.h"
#ifdef SHM_MEM
#include "mem/shm_mem.h"
#endif
#include <stdlib.h>
struct sr_timer* timer_list=0;
static int* jiffies=0;
static int timer_id=0;
/* ret 0 on success, <0 on error*/
int init_timer()
{
#ifdef SHM_MEM
jiffies=shm_malloc(sizeof(int));
#else
/* in this case get_ticks won't work! */
LOG(L_INFO, "WARNING: no shared memory support compiled in"
" get_ticks won't work\n");
jiffies=pkg_malloc(sizeof(int));
#endif
if (jiffies==0){
LOG(L_CRIT, "ERROR: init_timer: could not init jiffies\n");
return E_OUT_OF_MEM;
}
*jiffies=0;
return 0;
}
void destroy_timer()
{
struct sr_timer* t, *foo;
if (jiffies){
#ifdef SHM_MEM
shm_free(jiffies); jiffies=0;
#else
pkg_free(jiffies); jiffies=0;
#endif
}
t=timer_list;
while(t) {
foo=t->next;
pkg_free(t);
t=foo;
}
}
/*register a periodic timer;
* ret: <0 on error
* Hint: if you need it in a module, register it from mod_init or it
* won't work otherwise*/
int register_timer(timer_function f, void* param, unsigned int interval)
{
struct sr_timer* t;
t=pkg_malloc(sizeof(struct sr_timer));
if (t==0){
LOG(L_ERR, "ERROR: register_timer: out of memory\n");
goto error;
}
t->id=timer_id++;
t->timer_f=f;
t->t_param=param;
t->interval=interval;
t->expires=*jiffies+interval;
/* insert it into the list*/
t->next=timer_list;
timer_list=t;
return t->id;
error:
return E_OUT_OF_MEM;
}
void timer_ticker()
{
struct sr_timer* t;
unsigned int prev_jiffies;
prev_jiffies=*jiffies;
*jiffies+=TIMER_TICK;
/* test for overflow (if tick= 1s =>overflow in 136 years)*/
if (*jiffies<prev_jiffies){
/*force expire & update every timer, a little buggy but it
* happens once in 136 years :) */
for(t=timer_list;t;t=t->next){
t->expires=*jiffies+t->interval;
t->timer_f(*jiffies, t->t_param);
}
return;
}
for (t=timer_list;t; t=t->next){
if (*jiffies>=t->expires){
t->expires=*jiffies+t->interval;
t->timer_f(*jiffies, t->t_param);
}
}
}
unsigned int get_ticks()
{
if (jiffies==0){
LOG(L_CRIT, "BUG: get_ticks: jiffies not initialized\n");
return 0;
}
#ifndef SHM_MEM
LOG(L_CRIT, "WARNING: get_ticks: no shared memory support compiled in"
", returning 0 (probably wrong)");
return 0;
#endif
return *jiffies;
}
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