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/*
* Copyright (C) 2011 Jiaju Zhang <jjzhang@suse.de>
*
* 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 2.1 of the License, or (at your option) any later version.
*
* This software 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 library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/time.h>
#include "log.h"
#include "timer.h"
#define USEC_IN_SEC 1000000
#define MSEC_IN_SEC 1000
extern int poll_timeout;
static LIST_HEAD(timer_head);
unsigned long long current_time(void)
{
struct timeval tv;
gettimeofday(&tv, NULL);
return (tv.tv_sec * USEC_IN_SEC + tv.tv_usec);
}
struct timerlist * add_timer(unsigned long expires,
unsigned long data,
void (*function) (unsigned long data))
{
struct timerlist *timer;
timer = malloc(sizeof(struct timerlist));
if (!timer) {
log_error("failed to alloc mem for timer");
return NULL;
}
memset(timer, 0, sizeof(struct timerlist));
timer->expires = current_time() + expires * USEC_IN_SEC;
timer->data = data;
timer->function = function;
list_add_tail(&timer->entry, &timer_head);
return timer;
}
int mod_timer(struct timerlist *timer, unsigned long expires)
{
timer->expires = current_time() + expires * USEC_IN_SEC;
return 0;
}
int del_timer(struct timerlist *timer)
{
list_del(&timer->entry);
free(timer);
return 0;
}
void process_timerlist(void)
{
struct timerlist *timer;
if (list_empty(&timer_head))
return;
list_for_each_entry(timer, &timer_head, entry) {
if (current_time() >= timer->expires) {
timer->function(timer->data);
timer->expires = -1;
}
}
}
int timerlist_init(void)
{
poll_timeout = MSEC_IN_SEC;
return 0;
}
void timerlist_exit(void)
{
struct timerlist *timer, *safe;
list_for_each_entry_safe(timer, safe, &timer_head, entry) {
list_del(&timer->entry);
free(timer);
}
}

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