-
Notifications
You must be signed in to change notification settings - Fork 0
/
tapper.c
67 lines (55 loc) · 1.35 KB
/
tapper.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
#include <stdio.h>
#include <stdlib.h>
#include <err.h>
#include <pthread.h>
#include <unistd.h>
#include "tapper.h"
int
tapper_init(struct tapper_t* tapper, int delay, voidfunc func )
{
pthread_attr_init(&(tapper->thread_attr));
pthread_attr_setdetachstate(&(tapper->thread_attr), PTHREAD_CREATE_DETACHED);
tapper->delay = delay;
tapper->func = func;
tapper->thread_alive = 0;
tapper->count = 0;
return 0;
}
static void*
func_wrapper(void* tapper)
{
struct tapper_t *tim = (struct tapper_t*)tapper;
tim->thread_alive = 1;
const struct timespec del = {
.tv_sec = 0,
.tv_nsec = tim->delay
};
tim->count += 1;
clock_nanosleep(CLOCK_REALTIME, 0, &del, NULL);
tim->func(tapper);
tim->count = 0;
tim->thread_alive = 0;
pthread_exit(NULL);
}
int
tapper_run(struct tapper_t* tapper)
{
if (tapper->thread_alive)
pthread_cancel(tapper->thread);
int rc = pthread_create(
&(tapper->thread),
&(tapper->thread_attr),
func_wrapper,
(void*)tapper
);
if (rc) {
err(1, "Timer thread creation failed\n");
}
return 0;
}
int
tapper_destroy(struct tapper_t* tapper)
{
pthread_attr_destroy(&(tapper->thread_attr));
return 0;
}