Linux 定时器应用示例

1.运行结果

2.程序

#include <stdio.h>
#include <signal.h>
#include <sys/time.h>
int count=0;
struct itimerval t;
void timer_handler(int sig)
{printf("timer_handler:signal=%d,count=%d\n",sig,++count);if(count>=8){printf("cancel timer\n");t.it_value.tv_sec=0;t.it_value.tv_usec=0;setitimer(ITIMER_VIRTUAL,&t,NULL);}}
main()
{struct itimerval timer;signal(SIGVTALRM,timer_handler);timer.it_value.tv_sec=0;timer.it_value.tv_usec=100000;timer.it_value.tv_sec=1;timer.it_value.tv_usec=0;setitimer(ITIMER_VIRTUAL,&timer,NULL);printf("looping:enter Control-C to terminate\n");printf("Hello World!\r\n-----------------------------------");while(1){;}
}