Klagarge
d1189e8fda
Manual (but ugly) merge of feat/timer Co-authored-by: fastium <fastium.pro@proton.me>
51 lines
1.2 KiB
C
51 lines
1.2 KiB
C
#include "timer.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/timerfd.h>
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#include <sys/epoll.h>
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#include <unistd.h>
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#include <string.h>
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#include <fcntl.h>
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int timer_create_empty() {
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// Create timerfd
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int timer_fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK | TFD_CLOEXEC);
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if (timer_fd == -1) {
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perror("timerfd_create failed");
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exit(10);
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}
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return timer_fd;
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}
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void timer_set_time(int* timer_fd, long period_ms) {
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// https://www.man7.org/linux/man-pages/man3/itimerspec.3type.html
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struct itimerspec its;
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// Periodic interval
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its.it_interval.tv_sec = 0;
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its.it_interval.tv_nsec = 0;
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// Initial expiration
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its.it_value.tv_sec = period_ms / 1000;
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its.it_value.tv_nsec = (period_ms % 1000) * 1000000;
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if (timerfd_settime(*timer_fd, 0, &its, NULL) == -1) {
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perror("timerfd_settime failed");
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exit(11);
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}
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}
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void timer_link_to_epoll(int* timer_fd, int* epoll_fd) {
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struct epoll_event ev;
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ev.events = EPOLLIN;
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ev.data.fd = *timer_fd;
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if (epoll_ctl(*epoll_fd, EPOLL_CTL_ADD, *timer_fd, &ev) == -1) {
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perror("ERROR while add timerfd to epoll");
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exit(21);
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}
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} |