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refactor(lab03): merge create and configure timer function

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This commit is contained in:
Rémi Heredero
2026-04-24 13:32:56 +00:00
parent 2d26f30adf
commit 22f923bfbe
1 changed files with 17 additions and 13 deletions
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30
src/03-led-controller/main.c
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@@ -121,10 +121,19 @@ static void* timer_thread(void* arg) {
return NULL; return NULL;
} }
static void configure_timer(int* timer_fd, long period_ms) { int create_timer(long period_ms) {
// Create timerfd
int timer_fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK | TFD_CLOEXEC);
if (timer_fd == -1) {
perror("timerfd_create failed");
exit(10);
}
// Configure timer to expire every period_ms milliseconds
// https://www.man7.org/linux/man-pages/man3/itimerspec.3type.html // https://www.man7.org/linux/man-pages/man3/itimerspec.3type.html
static struct itimerspec its; struct itimerspec its;
// Periodic interval // Periodic interval
its.it_interval.tv_sec = period_ms / 1000; its.it_interval.tv_sec = period_ms / 1000;
@@ -134,14 +143,16 @@ static void configure_timer(int* timer_fd, long period_ms) {
its.it_value.tv_sec = period_ms / 1000; its.it_value.tv_sec = period_ms / 1000;
its.it_value.tv_nsec = (period_ms % 1000) * 1000000; its.it_value.tv_nsec = (period_ms % 1000) * 1000000;
if (timerfd_settime(*timer_fd, 0, &its, NULL) == -1) { if (timerfd_settime(timer_fd, 0, &its, NULL) == -1) {
perror("timerfd_settime failed"); perror("timerfd_settime failed");
exit(1); exit(11);
} }
return timer_fd;
} }
void link_timer_to_epoll(int* timer_fd, int* epoll_fd) { void link_timer_to_epoll(int* timer_fd, int* epoll_fd) {
static struct epoll_event ev; struct epoll_event ev;
ev.events = EPOLLIN; ev.events = EPOLLIN;
ev.data.fd = *timer_fd; ev.data.fd = *timer_fd;
if (epoll_ctl(*epoll_fd, EPOLL_CTL_ADD, *timer_fd, &ev) == -1) { if (epoll_ctl(*epoll_fd, EPOLL_CTL_ADD, *timer_fd, &ev) == -1) {
@@ -154,14 +165,7 @@ int main(int argc, char* argv[]) {
ThreadData data; ThreadData data;
pthread_t thread; pthread_t thread;
// Create timerfd data.timer_fd = create_timer(DEFAULT_TIME_MS);
data.timer_fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK | TFD_CLOEXEC);
if (data.timer_fd == -1) {
perror("timerfd_create failed");
return 1;
}
configure_timer(&data.timer_fd, DEFAULT_TIME_MS);
// Create epoll instance // Create epoll instance
data.epoll_fd = epoll_create1(0); data.epoll_fd = epoll_create1(0);