alarm_deadline.c (1078B)
1 /* ISC license. */ 2 3 #include <skalibs/sysdeps.h> 4 #include <skalibs/tai.h> 5 #include <skalibs/alarm.h> 6 7 #ifdef SKALIBS_HASTIMER 8 9 #include <errno.h> 10 #include <signal.h> 11 #include <time.h> 12 #include "alarm-internal.h" 13 14 #undef MYCLOCK 15 #ifdef SKALIBS_HASCLOCKMON 16 # define MYCLOCK CLOCK_MONOTONIC 17 #else 18 # define MYCLOCK CLOCK_REALTIME 19 #endif 20 21 int alarm_deadline (tain const *deadline) 22 { 23 struct itimerspec it = { .it_interval = { .tv_sec = 0, .tv_nsec = 0 } } ; 24 struct sigevent se = { .sigev_notify = SIGEV_SIGNAL, .sigev_signo = SIGALRM, .sigev_value = { .sival_int = 0 }, .sigev_notify_function = 0, .sigev_notify_attributes = 0 } ; 25 if (!timespec_from_tain(&it.it_value, deadline)) return 0 ; 26 if (timer_create(MYCLOCK, &se, &timer_here) < 0) return 0 ; 27 if (timer_settime(timer_here, TIMER_ABSTIME, &it, 0) < 0) 28 { 29 int e = errno ; 30 timer_delete(timer_here) ; 31 errno = e ; 32 return 0 ; 33 } 34 return 1 ; 35 } 36 37 #else 38 39 int alarm_deadline (tain const *deadline) 40 { 41 tain tto ; 42 tain_now(&tto) ; 43 tain_sub(&tto, deadline, &tto) ; 44 return alarm_timeout(&tto) ; 45 } 46 47 #endif