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#include <stdio.h>
#include <stdlib.h>
#include <sys/time.h>
#include <sys/epoll.h>
#include <sys/timerfd.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include "triton_p.h"
extern int max_events;
static int epoll_fd;
static struct epoll_event *epoll_events;
static pthread_t timer_thr;
static void *timer_thread(void *arg);
int timer_init(void)
{
epoll_fd = epoll_create(1);
if (epoll_fd < 0) {
perror("timer:epoll_create");
return -1;
}
epoll_events = malloc(max_events * sizeof(struct epoll_event));
if (!epoll_events) {
fprintf(stderr,"timer:cann't allocate memory\n");
return -1;
}
return 0;
}
void timer_run(void)
{
if (pthread_create(&timer_thr, NULL, timer_thread, NULL)) {
triton_log_error("timer:pthread_create: %s",strerror(errno));
_exit(-1);
}
}
void timer_terminate(void)
{
pthread_cancel(timer_thr);
pthread_join(timer_thr, NULL);
}
void *timer_thread(void *arg)
{
int i,n,r;
struct triton_timer_t *t;
while(1) {
n = epoll_wait(epoll_fd, epoll_events, max_events, -1);
if (n < 0) {
if (errno == EINTR)
continue;
triton_log_error("timer:epoll_wait: %s", strerror(errno));
_exit(-1);
}
for(i = 0; i < n; i++) {
t = (struct triton_timer_t *)epoll_events[i].data.ptr;
spin_lock(&t->ctx->lock);
list_add_tail(&t->entry2, &t->ctx->pending_timers);
t->pending = 1;
r=triton_queue_ctx(t->ctx);
spin_unlock(&t->ctx->lock);
if (r)
triton_thread_wakeup(t->ctx->thread);
}
}
return NULL;
}
int triton_timer_add(struct triton_timer_t *t, int abs_time)
{
t->epoll_event.data.ptr = t;
t->epoll_event.events = EPOLLIN | EPOLLET;
if (!t->ctx)
t->ctx = default_ctx;
t->fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK);
if (t->fd < 0) {
triton_log_error("timer:timerfd_create: %s" ,strerror(errno));
return -1;
}
if (triton_timer_mod(t, abs_time)) {
close(t->fd);
return -1;
}
spin_lock(&t->ctx->lock);
list_add_tail(&t->entry, &t->ctx->timers);
spin_unlock(&t->ctx->lock);
if (epoll_ctl(epoll_fd, EPOLL_CTL_ADD, t->fd, &t->epoll_event)) {
triton_log_error("timer:epoll_ctl: %s", strerror(errno));
spin_lock(&t->ctx->lock);
list_del(&t->entry);
spin_unlock(&t->ctx->lock);
close(t->fd);
return -1;
}
return 0;
}
int triton_timer_mod(struct triton_timer_t *t,int abs_time)
{
struct itimerspec ts = {
.it_value.tv_sec = t->expire_tv.tv_sec,
.it_value.tv_nsec = t->expire_tv.tv_usec * 1000,
.it_interval.tv_sec = t->period / 1000,
.it_interval.tv_nsec = t->period % 1000 * 1000,
};
if (t->expire_tv.tv_sec == 0 && t->expire_tv.tv_usec == 0)
ts.it_value = ts.it_interval;
if (timerfd_settime(t->fd, abs_time ? TFD_TIMER_ABSTIME : 0, &ts, NULL)) {
triton_log_error("timer:timerfd_settime: %s", strerror(errno));
return -1;
}
return 0;
}
void triton_timer_del(struct triton_timer_t *t)
{
epoll_ctl(epoll_fd, EPOLL_CTL_DEL, t->fd, &t->epoll_event);
close(t->fd);
spin_lock(&t->ctx->lock);
list_del(&t->entry);
if (t->pending)
list_del(&t->entry2);
spin_unlock(&t->ctx->lock);
}
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