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C++ 定时器触发

news 2025/7/15 14:07:44

c++定时器，能够定时触发，即每隔一段固定时间执行一下函数

#include <iostream>
#include <thread>
#include <chrono>
#include <signal.h>
#include <time.h>
#include <cstring>
#include <glog/logging.h>#define EVENTSAVERTIMER_SIG (SIGRTMIN + 14)   // 设置信号
#define EvensTimerPeriod (5) // 5ms// 定时器处理函数
void timerHandler(int sig, siginfo_t *si, void *uc) {LOG(ERROR) << "Timer triggered!" << std::endl;
}void EventSaverTimerInit(void)
{/*配置一个Posix timer*/timer_t TimerPulse;struct sigevent Timer1_Pulse_Sig;struct sigaction Timer1_Pulse_Sa;struct itimerspec Timer1_Pulse_it; // 匹配pulse类型定时器1 的timer设定参数int res;Timer1_Pulse_Sa.sa_flags = SA_SIGINFO | SA_RESTART;Timer1_Pulse_Sa.sa_sigaction = timerHandler;sigemptyset(&Timer1_Pulse_Sa.sa_mask);if (sigaction(EVENTSAVERTIMER_SIG, &Timer1_Pulse_Sa, NULL) == -1){perror("sigaction");}memset(&Timer1_Pulse_Sig, 0, sizeof(Timer1_Pulse_Sig));// 信号量配置Timer1_Pulse_Sig.sigev_value.sival_ptr = &TimerPulse;Timer1_Pulse_Sig.sigev_notify = SIGEV_SIGNAL;Timer1_Pulse_Sig.sigev_signo = EVENTSAVERTIMER_SIG;res = timer_create(CLOCK_REALTIME, &Timer1_Pulse_Sig, &TimerPulse);if (res != 0){perror("TimerPulse create Error");return;}Timer1_Pulse_it.it_value.tv_sec = 0; // 定时器第一次触发的时间, 启动延时时间 5 msTimer1_Pulse_it.it_value.tv_nsec = 5 * 1000 * 1000;Timer1_Pulse_it.it_interval.tv_sec = 0;								  // timer周期Timer1_Pulse_it.it_interval.tv_nsec = EvensTimerPeriod * 1000 * 1000; // 10 ms， 纳秒，微秒，毫秒，秒/*结束配置一个Poisix timer*/res = timer_settime(TimerPulse, 0, &Timer1_Pulse_it, NULL);if (res){perror("TimerPulse settime Error");return;}
}int main() {// startTimer();EventSaverTimerInit();// 主线程继续执行其他操作for (int i = 0; i < 100; ++i) {// std::cout << "Main thread doing work: " << i << std::endl;std::this_thread::sleep_for(std::chrono::seconds(1));}// 关闭gloggoogle::ShutdownGoogleLogging();return 0;
}