#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <time.h>
#include <iostream>
#define SIGNO_RTTIMER	SIGRTMIN
#define GET_TIME0(a)	get_time0(a, sizeof(a)) == NULL ? "error" : a
inline char * get_time0(char *buf, size_t sz_buf);
int inst_timer(void);
void h_rt_timer(int signum, siginfo_t *si, void *sv);

class Ti {
public:
	int Start() {
		sigset_t	sigset_timer;
		if (inst_timer() == -1) {
			return EXIT_FAILURE;
		}
		sigemptyset(&sigset_timer);
		while (1) {
			sigsuspend(&sigset_timer);
		}
	}
	int Check() {
		std::cout<<"Check"<<std::endl;
                //if (check == ƯÁ¤°ª) {
                //       return -1
                //}
		return 0;
	}
};

static Ti* s_ti;

int main(int argc, char *argv[])
{
	Ti ti;
	ti.Start();
	return 0;

}

int inst_timer(void)
{
	struct sigaction sa_rt1;
	struct sigevent sigev;
	timer_t	rt_timer;
	struct itimerspec rt_itspec;
	char	ts_now[20];
	memset(&sa_rt1, 0, sizeof(sa_rt1));
	sigemptyset(&sa_rt1.sa_mask);
	sa_rt1.sa_sigaction = h_rt_timer; /* rt_timer handler */
	sa_rt1.sa_flags = SA_SIGINFO;
	if (sigaction(SIGNO_RTTIMER, &sa_rt1, NULL) == -1) {
		perror("FAIL: sigaction()");
		return -1;
	}
	sigev.sigev_notify = SIGEV_SIGNAL; /* RT signal notification */
	sigev.sigev_signo = SIGNO_RTTIMER;
	/* create timer */
	if (timer_create(CLOCK_REALTIME, &sigev, &rt_timer) == -1) {
		perror("FAIL: timer_create()");
		return -1;
	}
	rt_itspec.it_value.tv_sec = 2;
	rt_itspec.it_value.tv_nsec = 500000000;
	rt_itspec.it_interval.tv_sec = 4;
	rt_itspec.it_interval.tv_nsec = 0;
	printf("Enable timer at %s.\n", GET_TIME0(ts_now));
	if (timer_settime(rt_timer, 0, &rt_itspec, NULL) == -1) {
		perror("FAIL: timer_settime()");
		return -1;
	}
	return 0;
}

inline char * get_time0(char *buf, size_t sz_buf)
{
#define STR_TIME_FORMAT		"%H:%M:%S"
	struct timespec	tspec;
	struct tm	tm_now;
	if (buf == NULL) return NULL;
	if (clock_gettime(CLOCK_REALTIME, &tspec) == -1) {
		return buf;
	}
	localtime_r((time_t *)&tspec.tv_sec, &tm_now);
	if (strftime(buf, sz_buf, STR_TIME_FORMAT, &tm_now) == 0) {
		return buf;
	}
	return buf;
}

void h_rt_timer(int signum, siginfo_t *si, void *sv)
{
	char	ts_now[20];
	printf("-> RT timer expiration at %s\n", GET_TIME0(ts_now));
	int check = s_ti->Check();
        if (check == -1) {
               // Á¾·á
        }
}