47 lines
1.0 KiB
C
47 lines
1.0 KiB
C
/*
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* Please, don't add this file to libcommon because timers requires
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* -lrt on systems with old libc (and probably also -lpthread for static
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* build).
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*/
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#include <time.h>
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#include <signal.h>
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#include <sys/time.h>
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#include "c.h"
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#include "timer.h"
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int setup_timer(timer_t * t_id, struct itimerval *timeout,
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void (*timeout_handler)(int, siginfo_t *, void *))
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{
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struct sigaction sig_a;
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static struct sigevent sig_e = {
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.sigev_notify = SIGEV_SIGNAL,
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.sigev_signo = SIGALRM
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};
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struct itimerspec val = {
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.it_value.tv_sec = timeout->it_value.tv_sec,
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.it_value.tv_nsec = timeout->it_value.tv_usec * 1000,
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.it_interval.tv_sec = 0,
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.it_interval.tv_nsec = 0
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};
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if (sigemptyset(&sig_a.sa_mask))
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return 1;
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sig_a.sa_flags = SA_SIGINFO;
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sig_a.sa_sigaction = timeout_handler;
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if (sigaction(SIGALRM, &sig_a, NULL))
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return 1;
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if (timer_create(CLOCK_MONOTONIC, &sig_e, t_id))
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return 1;
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if (timer_settime(*t_id, SA_SIGINFO, &val, NULL))
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return 1;
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return 0;
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}
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void cancel_timer(timer_t *t_id)
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{
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timer_delete(*t_id);
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}
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