2020-08-31 09:03:13 +00:00
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/* Timer handling
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*
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* (C) 2016 by Andreas Eversberg <jolly@eversberg.eu>
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* All Rights Reserved
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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2021-11-07 06:28:12 +00:00
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//#include <sys/time.h>
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#include <time.h>
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#include <errno.h>
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2020-08-31 09:03:13 +00:00
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#include "timer.h"
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2022-12-04 10:02:58 +00:00
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//#define DEBUG
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2020-08-31 09:03:13 +00:00
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static struct timer *timer_head = NULL;
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static struct timer **timer_tail_p = &timer_head;
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double get_time(void)
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{
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2021-11-07 06:28:12 +00:00
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static struct timespec tv;
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2020-08-31 09:03:13 +00:00
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2021-11-07 06:28:12 +00:00
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clock_gettime(CLOCK_REALTIME, &tv);
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2020-08-31 09:03:13 +00:00
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2021-11-07 06:28:12 +00:00
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return (double)tv.tv_sec + (double)tv.tv_nsec / 1000000000.0;
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2020-08-31 09:03:13 +00:00
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}
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2022-12-04 10:02:58 +00:00
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void timer_init(struct timer *timer, void (*fn)(void *data), void *priv)
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2020-08-31 09:03:13 +00:00
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{
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if (timer->linked) {
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fprintf(stderr, "Timer is already initialized, aborting!\n");
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abort();
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}
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timer->timeout = 0;
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2022-12-04 10:02:58 +00:00
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timer->cb = fn;
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timer->data = priv;
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2020-08-31 09:03:13 +00:00
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timer->next = NULL;
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*timer_tail_p = timer;
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timer_tail_p = &timer->next;
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timer->linked = 1;
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2022-12-04 10:02:58 +00:00
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#ifdef DEBUG
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fprintf(stderr, "%s: timer=%p linked.\n", __func__, timer);
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#endif
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2020-08-31 09:03:13 +00:00
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}
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void timer_exit(struct timer *timer)
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{
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timer_tail_p = &timer_head;
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while (*timer_tail_p) {
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if (timer == *timer_tail_p)
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*timer_tail_p = (*timer_tail_p)->next;
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else
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timer_tail_p = &((*timer_tail_p)->next);
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}
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timer->linked = 0;
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2022-12-04 10:02:58 +00:00
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#ifdef DEBUG
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fprintf(stderr, "%s: timer=%p unlinked.\n", __func__, timer);
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#endif
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2020-08-31 09:03:13 +00:00
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}
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void timer_start(struct timer *timer, double duration)
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{
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if (!timer->linked) {
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fprintf(stderr, "Timer is not initialized, aborting!\n");
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abort();
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}
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timer->duration = duration;
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timer->timeout = get_time() + duration;
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2022-12-04 10:02:58 +00:00
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#ifdef DEBUG
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fprintf(stderr, "%s: timer=%p started %.3f seconds.\n", __func__, timer, duration);
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#endif
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2020-08-31 09:03:13 +00:00
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}
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void timer_stop(struct timer *timer)
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{
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if (!timer->linked) {
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fprintf(stderr, "Timer is not initialized, aborting!\n");
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abort();
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}
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timer->timeout = 0;
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2022-12-04 10:02:58 +00:00
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#ifdef DEBUG
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fprintf(stderr, "%s: timer=%p stopped.\n", __func__, timer);
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#endif
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2020-08-31 09:03:13 +00:00
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}
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int timer_running(struct timer *timer)
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{
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if (!timer->linked) {
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fprintf(stderr, "Timer is not initialized, aborting!\n");
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abort();
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}
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return (timer->timeout != 0);
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}
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2022-12-04 10:02:58 +00:00
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double process_timer(void)
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2020-08-31 09:03:13 +00:00
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{
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struct timer *timer;
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2022-12-04 10:02:58 +00:00
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double now, timeout = -1.0;
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2020-08-31 09:03:13 +00:00
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now = get_time();
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again:
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timer = timer_head;
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while (timer) {
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2022-12-04 10:02:58 +00:00
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if (timer->linked && timer->timeout > 0) {
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/* timeout, handle it, set timeout to 0 */
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if (now >= timer->timeout) {
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timer->timeout = 0;
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#ifdef DEBUG
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fprintf(stderr, "%s: timer=%p fired.\n", __func__, timer);
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#endif
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if (!timer->cb)
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abort();
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timer->cb(timer->data);
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timeout = 0.0;
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goto again;
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}
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/* in the future, set timeout to future */
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if (timeout < 0.0 || (timer->timeout - now) < timeout)
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timeout = timer->timeout - now;
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2020-08-31 09:03:13 +00:00
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}
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timer = timer->next;
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}
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2022-12-04 10:02:58 +00:00
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return timeout;
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}
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void osmo_timer_schedule(struct osmo_timer_list *ti, time_t sec, suseconds_t usec)
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{
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if (!ti->linked)
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timer_init(ti, ti->cb, ti->data);
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timer_start(ti, (double)sec + (double)usec / 1000000.0);
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}
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void osmo_timer_del(struct osmo_timer_list *ti)
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{
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timer_exit(ti);
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}
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int osmo_timer_pending(struct osmo_timer_list *ti)
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{
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if (!ti->linked)
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return 0;
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return (ti->timeout != 0);
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2020-08-31 09:03:13 +00:00
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}
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