timer.c

来自「Linux下的ftp服务器」· C语言 代码 · 共 53 行

#include <stdio.h>
#include <time.h>
#include <sys/time.h>
#include <stdlib.h>
#include <signal.h>
int count = 0;
unsigned long int i=0;
//unsigned long int sum=0;
int flags=0;
void set_timer()
{
        struct itimerval itv, oldtv;
        itv.it_interval.tv_sec = 1;
        itv.it_interval.tv_usec = 0;
        itv.it_value.tv_sec = 1;
        itv.it_value.tv_usec = 0;

        setitimer(ITIMER_REAL, &itv, &oldtv);
}

void sigalrm_handler(int sig)
{
        count++;
        printf("Frequency.. %d\n", i);
		if(i>155000000)
		{
			printf("flags...%d\n",flags=1);
			sleep(1);
		}
		//pause();
		i=0;
}

int main()
{
        signal(SIGALRM, sigalrm_handler);
        set_timer();
        while (count < 10)
        {	if(flags)
			{
				//usleep(800000);
				//sleep(1);
				flags=0;
				pause();
				
			}
			i++;
			
			
		}
	    exit(0);
}