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
|
/* ISC license. */
#include <skalibs/sysdeps.h>
#include <skalibs/alarm.h>
#ifdef SKALIBS_HASTIMER
#include <errno.h>
#include <signal.h>
#include <time.h>
#include "alarm-internal.h"
#undef MYCLOCK
#ifdef SKALIBS_HASCLOCKMON
# define MYCLOCK CLOCK_MONOTONIC
#else
# define MYCLOCK CLOCK_REALTIME
#endif
int alarm_milliseconds (unsigned int t)
{
struct itimerspec it = { .it_interval = { .tv_sec = 0, .tv_nsec = 0 }, .it_value = { .tv_sec = t / 1000, .tv_nsec = 1000000 * (t % 1000) } } ;
struct sigevent se = { .sigev_notify = SIGEV_SIGNAL, .sigev_signo = SIGALRM, .sigev_value = { .sival_int = 0 }, .sigev_notify_function = 0, .sigev_notify_attributes = 0 } ;
if (timer_create(MYCLOCK, &se, &timer_here) < 0) return 0 ;
if (timer_settime(timer_here, 0, &it, 0) < 0)
{
int e = errno ;
timer_delete(timer_here) ;
errno = e ;
return 0 ;
}
return 1 ;
}
#else
#ifdef SKALIBS_HASITIMER
#include <sys/time.h>
int alarm_milliseconds (unsigned int t)
{
struct itimerval it = { .it_interval = { .tv_sec = 0, .tv_usec = 0 }, .it_value = { .tv_sec = t / 1000, .tv_usec = 1000 * (t % 1000) } } ;
if (setitimer(ITIMER_REAL, &it, 0) < 0) return 0 ;
return 1 ;
}
#else
#include <unistd.h>
#include <limits.h>
int alarm_milliseconds (unsigned int t)
{
if (t > UINT_MAX - 999) return 0 ;
t = (t + 999) / 1000 ;
alarm(t) ;
return 1 ;
}
#endif
#endif
|
