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/* ISC license. */
#include <skalibs/sysdeps.h>
#include <skalibs/tai.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_deadline (tain_t const *deadline)
{
struct itimerspec it = { .it_interval = { .tv_sec = 0, .tv_nsec = 0 } } ;
struct sigevent se = { .sigev_notify = SIGEV_SIGNAL, .sigev_signo = SIGALRM, .sigev_value = { .sival_int = 0 }, .sigev_notify_function = 0, .sigev_notify_attributes = 0 } ;
if (!timespec_from_tain(&it.it_value, deadline)) return 0 ;
if (timer_create(MYCLOCK, &se, &timer_here) < 0) return 0 ;
if (timer_settime(timer_here, TIMER_ABSTIME, &it, 0) < 0)
{
int e = errno ;
timer_delete(timer_here) ;
errno = e ;
return 0 ;
}
return 1 ;
}
#else
int alarm_deadline (tain_t const *deadline)
{
tain_t tto ;
tain_now(&tto) ;
tain_sub(&tto, deadline, &tto) ;
return alarm_timeout(&tto) ;
}
#endif
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