linux定时器取消-----大牛来

#include <stdio.h>

#include <stdlib.h>

#include<pthread.h>

#include<sys/time.h>

#include<unistd.h>

#include<signal.h>

int count = 0;

void set_timer()

{

        struct itimerval itv, oldtv;

        itv.it_interval.tv_sec = 7200;

        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("timer signal.. %d\n", count);

        time_t timep;

        struct tm *p;

        time(&timep);

        p = localtime(&timep);

        printf("%d:%d\n",p->tm_hour,p->tm_min);

     

}

void * fun()

  {

      char *wday[]={"Sun","Mon","Tue","Wed","Thu","Fri","Sat"};

      timer_t timep,timep1;

      struct tm *p,*p2;

      time(&timep);

      time(&timep1);

      p=gmtime(&timep); //格林威治(GMT)时间

      printf("%d%d%d ",(1900+p->tm_year), (1+p->tm_mon),p->tm_mday);



      printf("%s %d:%d:%d\n", wday[p->tm_wday], p->tm_hour, p->tm_min, p->tm_sec);

      p2=localtime(&timep); /*取得当地时间*/

      printf ("%d%d%d ", (1900+p2->tm_year),( 1+p2->tm_mon), p2->tm_mday);

      printf("%s %d:%d:%d\n", wday[p2->tm_wday],p2->tm_hour, p2->tm_min, p2->tm_sec);



        signal(SIGALRM, sigalrm_handler);

        set_timer();

  }



int main()

{



  pthread_t tid;

  pthread_create(&tid,NULL,fun,NULL);

  void *ret;

  pthread_join(tid,&ret);

  while(1);

  return 0;

}