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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"
int max_events=128;
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("epoll_create");
return -1;
}
epoll_events=malloc(max_events * sizeof(struct epoll_event));
if (!epoll_events)
{
fprintf(stderr,"cann't allocate memory\n");
return -1;
}
return 0;
}
void timer_run(void)
{
pthread_create(&timer_thr,NULL,timer_thread,NULL);
}
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)
perror("epoll_wait");
continue;
}
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);
}
}
}
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)
{
fprintf(stderr,"timer: timerfd_create failed: %s\n",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))
{
fprintf(stderr,"timer: epoll_ctl failed: %s\n",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))
{
fprintf(stderr,"timer: timerfd_settime failed: %s\n",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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