timer.c

linux下的进程间定时器程序

#include <stdio.h>
#include <time.h>
#include <sys/time.h>
#include <stdlib.h>
#include <signal.h>
int count = 0;
void set_timer()
{
        struct itimerval itv,oldtv;
        itv.it_interval.tv_sec = 0;
        itv.it_interval.tv_usec =10000;
        itv.it_value.tv_sec =0;
        itv.it_value.tv_usec = 10000;

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

void sigvtalrm_handler(int sig)
{
        count++;
        printf("timer signal.. %d\n", count);
}

int main()
{
        signal(SIGVTALRM, sigvtalrm_handler);
        set_timer();
        while (count < 1000)
        {}
        exit(1);
}