linux下多定时器源码

#include <time.h>
#include <signal.h>
#include<stdio.h>
#include<stdlib.h>
#include <unistd.h>
#include <string.h>
void handle(union sigval v)  
{  
    time_t t;  
    char p[32];  
 
    time(&t);  
    strftime(p, sizeof(p), "%T", localtime(&t));  
 
    printf("%s thread %lu, val = %d, signal captured.\n", p, pthread_self(), v.sival_int);    
    return;  
}  
 
void handlec(union sigval v)  //定时器2产生信号时调用的处理函数
{  
    time_t t;  
    char p[32];  
 
    time(&t);  
    strftime(p, sizeof(p), "%T", localtime(&t));  
 
    printf("%s thread %lu, val = %d, signal captured.\n", p, pthread_self(), v.sival_int);    
    return;  
}    
 
int main()    
{  
    struct sigevent evp,evc;  
    struct itimerspec ts,tsc;  
    timer_t timer,timerc;    
    int ret,retc;  
/*----------------------定时器2---------------------------------------*/  
memset (&evc, 0, sizeof (evc));  
evc.sigev_value.sival_ptr = &timerc;  
evc.sigev_notify = SIGEV_THREAD;  
evc.sigev_notify_function = handlec;  
evc.sigev_value.sival_int = 2; //作为handle()的参数  

retc = timer_create(CLOCK_REALTIME, &evc, &timerc);  
if( retc)  
    perror("timerc_create");  

tsc.it_interval.tv_sec = 5;    
tsc.it_interval.tv_nsec = 0;  
tsc.it_value.tv_sec = 3;  
tsc.it_value.tv_nsec = 0;  

retc = timer_settime(timerc, TIMER_ABSTIME, &tsc, NULL);  
if( retc )  
    perror("timerc_settime"); 
/*---------------------定时器4-------------------------------------*/  

    memset (&evp, 0, sizeof (evp));  
    evp.sigev_value.sival_ptr = &timer;  
    evp.sigev_notify = SIGEV_THREAD;  
    evp.sigev_notify_function = handle;  
    evp.sigev_value.sival_int = 4; //作为handle()的参数  
 
    ret = timer_create(CLOCK_REALTIME, &evp, &timer);  
    if( ret)  
        perror("timer_create");  
 
    ts.it_interval.tv_sec = 1;    
    ts.it_interval.tv_nsec = 0;  
    ts.it_value.tv_sec = 3;  
    ts.it_value.tv_nsec = 0;  
 
    ret = timer_settime(timer, TIMER_ABSTIME, &ts, NULL);  
    if( ret )  
        perror("timer_settime");  
 
    while(1);  
}