initial git import
This commit is contained in:
107
src/common/timer.c
Normal file
107
src/common/timer.c
Normal file
@@ -0,0 +1,107 @@
|
||||
/* 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 "timer.h"
|
||||
|
||||
static struct timer *timer_head = NULL;
|
||||
static struct timer **timer_tail_p = &timer_head;
|
||||
|
||||
double get_time(void)
|
||||
{
|
||||
struct timeval tv;
|
||||
|
||||
gettimeofday(&tv, NULL);
|
||||
|
||||
return (double)tv.tv_sec + (double)tv.tv_usec / 1000000.0;
|
||||
}
|
||||
|
||||
void timer_init(struct timer *timer, void (*fn)(struct timer *timer), void *priv)
|
||||
{
|
||||
if (timer->linked) {
|
||||
fprintf(stderr, "Timer is already initialized, aborting!\n");
|
||||
abort();
|
||||
}
|
||||
|
||||
timer->timeout = 0;
|
||||
timer->fn = fn;
|
||||
timer->priv = priv;
|
||||
timer->next = NULL;
|
||||
*timer_tail_p = timer;
|
||||
timer_tail_p = &timer->next;
|
||||
timer->linked = 1;
|
||||
}
|
||||
|
||||
void timer_exit(struct timer *timer)
|
||||
{
|
||||
timer_tail_p = &timer_head;
|
||||
while (*timer_tail_p) {
|
||||
if (timer == *timer_tail_p)
|
||||
*timer_tail_p = timer->next;
|
||||
timer_tail_p = &timer->next;
|
||||
}
|
||||
timer->linked = 0;
|
||||
}
|
||||
|
||||
void timer_start(struct timer *timer, double duration)
|
||||
{
|
||||
struct timeval tv;
|
||||
|
||||
if (!timer->linked) {
|
||||
fprintf(stderr, "Timer is not initialized, aborting!\n");
|
||||
abort();
|
||||
}
|
||||
|
||||
gettimeofday(&tv, NULL);
|
||||
|
||||
timer->timeout = get_time() + duration;
|
||||
}
|
||||
|
||||
void timer_stop(struct timer *timer)
|
||||
{
|
||||
if (!timer->linked) {
|
||||
fprintf(stderr, "Timer is not initialized, aborting!\n");
|
||||
abort();
|
||||
}
|
||||
|
||||
timer->timeout = 0;
|
||||
}
|
||||
|
||||
void process_timer(void)
|
||||
{
|
||||
struct timer *timer = timer_head;
|
||||
double now;
|
||||
|
||||
now = get_time();
|
||||
|
||||
again:
|
||||
while (timer) {
|
||||
if (timer->linked && timer->timeout > 0 && now >= timer->timeout) {
|
||||
timer->timeout = 0;
|
||||
timer->fn(timer);
|
||||
goto again;
|
||||
}
|
||||
timer = timer->next;
|
||||
}
|
||||
}
|
||||
|
Reference in New Issue
Block a user