#include<signal.h> 
#include<stdio.h> 
#include<stdlib.h> 
#include<time.h> 
#include<unistd.h> 
int count1=0,count2=0; 
void handler1(int sig,siginfo_t*,void*){ 
     if(sig==SIGRTMIN){printf("Timer 1s:%d\n",++count1);} 
} 
void handler2(int sig,siginfo_t*,void*){ 
     if(sig==SIGRTMIN+1){printf("              Timer 2s:%d\n",++count2);} 
     for(int i=0;i<2000000000;++i){ 
         int j=i+2; 
         int k=j*j; 
     } 
} 
timer_t createTimer(int sig, double secs){ 
     sigevent sev; 
     timer_t timerid; 
     sev.sigev_notify=SIGEV_SIGNAL; 
     sev.sigev_signo =sig; 
     sev.sigev_value.sival_ptr=&timerid; 
     if(timer_create(CLOCK_REALTIME,&sev,&timerid)==-1)return 0; 
      
     long freq_nanosecs=(long)secs*1000000000; 
     itimerspec its; 
     its.it_value.tv_sec    =freq_nanosecs/1000000000; 
     its.it_value.tv_nsec   =freq_nanosecs%1000000000; 
     its.it_interval.tv_sec =its.it_value.tv_sec; 
     its.it_interval.tv_nsec=its.it_value.tv_nsec; 
  
     if(timer_settime(timerid,0,&its,NULL)==-1)return 0; 
     return timerid; 
} 
int main(void){ 
     struct sigaction sa; 
     sa.sa_flags=SA_SIGINFO; 
     sa.sa_sigaction=handler1; 
     sigemptyset(&sa.sa_mask); 
     if(sigaction(SIGRTMIN,&sa,NULL)==-1)return 1; 
     sa.sa_sigaction=handler2; 
     if(sigaction(SIGRTMIN+1,&sa,NULL)==-1)return 2; 
      
     createTimer(SIGRTMIN,  1); 
     createTimer(SIGRTMIN+1,2); 
     int left=10; 
     do{left=sleep(left);}while(left>0); 
     return 0; 
}