相关函数
# 创建一个POSIX标准的进程定时器
timer_create
# 设置或者获得定时器时间值
timer_settime
timer_gettime
# 删除定时器
timer_delete
代码
#include <stdio.h>
#include <signal.h>
#include <time.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
void timer_notify_funcation(union sigval v) {
printf("hello world\n");
}
void start_timer(timer_t& timer_id) {
struct sigevent sevp;
struct itimerspec it;
bzero(&sevp, sizeof(struct sigevent));
sevp.sigev_value.sival_int = 10;
sevp.sigev_notify = SIGEV_THREAD;
sevp.sigev_notify_function = timer_notify_funcation;
int err = timer_create(CLOCK_REALTIME, &sevp, &timer_id);
if(err < 0) {
printf("timer_create exit code: %d\n", err);
return;
}
bzero(&it, sizeof(struct itimerspec));
it.it_interval.tv_sec = 1;
it.it_interval.tv_nsec = 0;
it.it_value.tv_sec = 3;
it.it_value.tv_nsec = 0;
int err2 = timer_settime(timer_id, 0, &it, NULL);
if(err2 < 0) {
printf("timer_settime exit code: %d\n", err2);
return;
}
}
void stop_timer(timer_t& timer_id) {
int err = timer_delete(timer_id);
if(err < 0) {
printf("timer_delete exit code: %d\n", err);
return;
}
}
int main() {
timer_t timer_id;
start_timer(timer_id);
int number = 0;
while (++number) {
sleep(1);
if(number > 10) {
stop_timer(timer_id);
break;
}
}
return 1;
}