#include <linux/types.h>
#include <linux/input.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/types.h>
#include <poll.h>
#include <sys/epoll.h>
#include <pthread.h>
#include <signal.h>
#include <stdio.h>
#include <string.h>
#include <sys/time.h>
#define SIGTIMER (SIGRTMAX)
#define ONESHOTTIMER (SIGRTMAX-1)
timer_t SetTimer(int signo, int sec, int mode);
timer_t timerid,oneshotTimer;
int count;
int main()
{
timerid = SetTimer(SIGTIMER, 500, 1);
//oneshotTimer = SetTimer(ONESHOTTIMER, 5000, 0);
while(1){
printf("sleep 5s count : %d\n",count);
sleep(5);
count++;
if (timerid == 0){
printf("settimer again\n");
timerid = SetTimer(SIGTIMER, 500, 1);
}
};
return 0;
}
static void timer_test_func(union sigval sigev_val)
{
printf("[%d %s]\n",__LINE__,__func__);
if ( count > 5){
printf("timer_delete\n");
timer_delete(timerid);
timerid = 0;
count = 0;
}
return;
}
timer_t SetTimer(int signo, int sec, int mode)
{
struct sigevent sigev;
timer_t timerid;
struct itimerspec itval;
// Create the POSIX timer to generate signo
memset(&sigev, 0, sizeof( struct sigevent));
sigev.sigev_notify = SIGEV_THREAD;
sigev.sigev_notify_function = timer_test_func;
sigev.sigev_value.sival_ptr = &timerid;
printf("timer_create\n");
if (timer_create(CLOCK_REALTIME, &sigev, &timerid) == 0) {
itval.it_value.tv_sec = 10;
itval.it_value.tv_nsec = 0;
itval.it_interval.tv_sec = 2;
itval.it_interval.tv_nsec = 0;
printf("timer_settime\n");
if (timer_settime(timerid, 0, &itval, NULL) != 0) {
perror("time_settime error!");
}
printf("timer_settime success\n");
} else {
perror("timer_create error!");
return (timer_t)-1;
}
return timerid;
}
Timer test code in linux
