166 lines
3.6 KiB
C
166 lines
3.6 KiB
C
/* Timer handling
|
|
*
|
|
* (C) 2016 by Andreas Eversberg <jolly@eversberg.eu>
|
|
* All Rights Reserved
|
|
*
|
|
* 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 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* 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.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdint.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
//#include <sys/time.h>
|
|
#include <time.h>
|
|
#include <errno.h>
|
|
#include "timer.h"
|
|
|
|
//#define DEBUG
|
|
|
|
static struct timer *timer_head = NULL;
|
|
static struct timer **timer_tail_p = &timer_head;
|
|
|
|
double get_time(void)
|
|
{
|
|
static struct timespec tv;
|
|
|
|
clock_gettime(CLOCK_REALTIME, &tv);
|
|
|
|
return (double)tv.tv_sec + (double)tv.tv_nsec / 1000000000.0;
|
|
}
|
|
|
|
void timer_init(struct timer *timer, void (*fn)(void *data), void *priv)
|
|
{
|
|
if (timer->linked) {
|
|
fprintf(stderr, "Timer is already initialized, aborting!\n");
|
|
abort();
|
|
}
|
|
|
|
timer->timeout = 0;
|
|
timer->cb = fn;
|
|
timer->data = priv;
|
|
timer->next = NULL;
|
|
*timer_tail_p = timer;
|
|
timer_tail_p = &timer->next;
|
|
timer->linked = 1;
|
|
#ifdef DEBUG
|
|
fprintf(stderr, "%s: timer=%p linked.\n", __func__, timer);
|
|
#endif
|
|
}
|
|
|
|
void timer_exit(struct timer *timer)
|
|
{
|
|
timer_tail_p = &timer_head;
|
|
while (*timer_tail_p) {
|
|
if (timer == *timer_tail_p)
|
|
*timer_tail_p = (*timer_tail_p)->next;
|
|
else
|
|
timer_tail_p = &((*timer_tail_p)->next);
|
|
}
|
|
timer->linked = 0;
|
|
#ifdef DEBUG
|
|
fprintf(stderr, "%s: timer=%p unlinked.\n", __func__, timer);
|
|
#endif
|
|
}
|
|
|
|
void timer_start(struct timer *timer, double duration)
|
|
{
|
|
if (!timer->linked) {
|
|
fprintf(stderr, "Timer is not initialized, aborting!\n");
|
|
abort();
|
|
}
|
|
|
|
timer->duration = duration;
|
|
timer->timeout = get_time() + duration;
|
|
#ifdef DEBUG
|
|
fprintf(stderr, "%s: timer=%p started %.3f seconds.\n", __func__, timer, duration);
|
|
#endif
|
|
}
|
|
|
|
void timer_stop(struct timer *timer)
|
|
{
|
|
if (!timer->linked) {
|
|
fprintf(stderr, "Timer is not initialized, aborting!\n");
|
|
abort();
|
|
}
|
|
|
|
timer->timeout = 0;
|
|
#ifdef DEBUG
|
|
fprintf(stderr, "%s: timer=%p stopped.\n", __func__, timer);
|
|
#endif
|
|
}
|
|
|
|
int timer_running(struct timer *timer)
|
|
{
|
|
if (!timer->linked) {
|
|
fprintf(stderr, "Timer is not initialized, aborting!\n");
|
|
abort();
|
|
}
|
|
|
|
return (timer->timeout != 0);
|
|
}
|
|
|
|
double process_timer(void)
|
|
{
|
|
struct timer *timer;
|
|
double now, timeout = -1.0;
|
|
|
|
now = get_time();
|
|
|
|
again:
|
|
timer = timer_head;
|
|
while (timer) {
|
|
if (timer->linked && timer->timeout > 0) {
|
|
/* timeout, handle it, set timeout to 0 */
|
|
if (now >= timer->timeout) {
|
|
timer->timeout = 0;
|
|
#ifdef DEBUG
|
|
fprintf(stderr, "%s: timer=%p fired.\n", __func__, timer);
|
|
#endif
|
|
if (!timer->cb)
|
|
abort();
|
|
timer->cb(timer->data);
|
|
timeout = 0.0;
|
|
goto again;
|
|
}
|
|
/* in the future, set timeout to future */
|
|
if (timeout < 0.0 || (timer->timeout - now) < timeout)
|
|
timeout = timer->timeout - now;
|
|
}
|
|
timer = timer->next;
|
|
}
|
|
|
|
return timeout;
|
|
}
|
|
|
|
void osmo_timer_schedule(struct osmo_timer_list *ti, time_t sec, suseconds_t usec)
|
|
{
|
|
if (!ti->linked)
|
|
timer_init(ti, ti->cb, ti->data);
|
|
timer_start(ti, (double)sec + (double)usec / 1000000.0);
|
|
}
|
|
|
|
void osmo_timer_del(struct osmo_timer_list *ti)
|
|
{
|
|
timer_exit(ti);
|
|
}
|
|
|
|
int osmo_timer_pending(struct osmo_timer_list *ti)
|
|
{
|
|
if (!ti->linked)
|
|
return 0;
|
|
return (ti->timeout != 0);
|
|
}
|
|
|