linux多线程定时器中断

#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <time.h>
#include <unistd.h>

void timer_handler(int signum) {
    printf("Timer expired!\n");
}

int main() {
    struct sigaction sa;
    struct itimerspec its;
    timer_t timerid;

    // 设置信号处理函数
    sa.sa_handler = &timer_handler;
    sigemptyset(&sa.sa_mask);
    sa.sa_flags = 0;
    sigaction(SIGALRM, &sa, NULL);

    // 创建定时器
    timer_create(CLOCK_REALTIME, NULL, &timerid);

    // 设置定时器时间
    its.it_value.tv_sec = 1; // 初始间隔1秒
    its.it_value.tv_nsec = 0;
    its.it_interval.tv_sec = 1; // 重复间隔1秒
    its.it_interval.tv_nsec = 0;

    timer_settime(timerid, 0, &its, NULL);

    while(1) {
        sleep(1);
    }

    return 0;
}