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#include <stdio.h>
#include <stdlib.h>
#include <sys/time.h>
#include <sys/epoll.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include <signal.h>
#ifdef HAVE_TIMERFD
#include <sys/timerfd.h>
#else
#include "timerfd.h"
#endif
#include "triton_p.h"
#include "memdebug.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);
static mempool_t *timer_pool;
static pthread_mutex_t freed_list_lock = PTHREAD_MUTEX_INITIALIZER;
static LIST_HEAD(freed_list);
static LIST_HEAD(freed_list2);
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: cannot allocate memory\n");
return -1;
}
timer_pool = mempool_create(sizeof(struct _triton_timer_t));
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;
sigset_t set;
sigfillset(&set);
sigdelset(&set, SIGKILL);
sigdelset(&set, SIGSTOP);
pthread_sigmask(SIG_BLOCK, &set, NULL);
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;
if (!t->ud)
continue;
spin_lock(&t->ctx->lock);
if (t->ud) {
if (!t->pending) {
list_add_tail(&t->entry2, &t->ctx->pending_timers);
t->pending = 1;
__sync_add_and_fetch(&triton_stat.timer_pending, 1);
r = triton_queue_ctx(t->ctx);
} else
r = 0;
} else
r = 0;
spin_unlock(&t->ctx->lock);
if (r)
triton_thread_wakeup(t->ctx->thread);
}
while (!list_empty(&freed_list2)) {
t = list_entry(freed_list2.next, typeof(*t), entry);
list_del(&t->entry);
mempool_free(t);
}
pthread_mutex_lock(&freed_list_lock);
while (!list_empty(&freed_list)) {
t = list_entry(freed_list.next, typeof(*t), entry);
list_del(&t->entry);
list_add(&t->entry, &freed_list2);
}
pthread_mutex_unlock(&freed_list_lock);
}
return NULL;
}
int __export triton_timer_add(struct triton_context_t *ctx, struct triton_timer_t *ud, int abs_time)
{
struct _triton_timer_t *t = mempool_alloc(timer_pool);
memset(t, 0, sizeof(*t));
t->ud = ud;
t->epoll_event.data.ptr = t;
t->epoll_event.events = EPOLLIN | EPOLLET;
if (ctx)
t->ctx = (struct _triton_context_t *)ctx->tpd;
else
t->ctx = (struct _triton_context_t *)default_ctx.tpd;
t->fd = timerfd_create(abs_time ? CLOCK_REALTIME : CLOCK_MONOTONIC, 0);
if (t->fd < 0) {
triton_log_error("timer:timerfd_create: %s", strerror(errno));
mempool_free(t);
return -1;
}
if (fcntl(t->fd, F_SETFL, O_NONBLOCK)) {
triton_log_error("timer: failed to set nonblocking mode: %s", strerror(errno));
goto out_err;
}
ud->tpd = t;
if (triton_timer_mod(ud, abs_time))
goto out_err;
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);
t->ud = NULL;
list_del(&t->entry);
spin_unlock(&t->ctx->lock);
goto out_err;
}
triton_stat.timer_count++;
return 0;
out_err:
ud->tpd = NULL;
close(t->fd);
mempool_free(t);
return -1;
}
int __export triton_timer_mod(struct triton_timer_t *ud,int abs_time)
{
struct _triton_timer_t *t = (struct _triton_timer_t *)ud->tpd;
struct itimerspec ts = {
.it_value.tv_sec = ud->expire_tv.tv_sec,
.it_value.tv_nsec = ud->expire_tv.tv_usec * 1000,
.it_interval.tv_sec = ud->period / 1000,
.it_interval.tv_nsec = (ud->period % 1000) * 1000,
};
if (ud->expire_tv.tv_sec == 0 && ud->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 __export triton_timer_del(struct triton_timer_t *ud)
{
struct _triton_timer_t *t = (struct _triton_timer_t *)ud->tpd;
epoll_ctl(epoll_fd, EPOLL_CTL_DEL, t->fd, &t->epoll_event);
close(t->fd);
spin_lock(&t->ctx->lock);
t->ud = NULL;
list_del(&t->entry);
if (t->pending) {
list_del(&t->entry2);
__sync_sub_and_fetch(&triton_stat.timer_pending, 1);
}
spin_unlock(&t->ctx->lock);
sched_yield();
pthread_mutex_lock(&freed_list_lock);
list_add_tail(&t->entry, &freed_list);
pthread_mutex_unlock(&freed_list_lock);
ud->tpd = NULL;
triton_stat.timer_count--;
}
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