package/libtapi/src/events.c

   1 #include <stdbool.h>
   2 #include <sys/epoll.h>
   3 #include <stdlib.h>
   4 #include <errno.h>
   5
   6 #include <stdio.h>
   7
   8 #include "events.h"
   9
  10 struct event_callback *event_callbacks;
  11
  12 static int event_epoll_fd = -1;
  13
  14 int event_register(int fd, int events, struct event_callback *cb)
  15 {
  16         struct epoll_event ev;
  17
  18         if (event_epoll_fd == -1)
  19                 event_epoll_fd = epoll_create(1);
  20
  21         ev.events = events;
  22         ev.data.ptr = cb;
  23
  24         cb->fd = fd;
  25
  26         return epoll_ctl(event_epoll_fd, EPOLL_CTL_ADD, fd, &ev);
  27 }
  28
  29 int     event_unregister(int fd)
  30 {
  31         return epoll_ctl(event_epoll_fd, EPOLL_CTL_DEL, fd, NULL);
  32 }
  33
  34 int tapi_mainloop(void)
  35 {
  36         struct epoll_event ev[10];
  37         struct event_callback *cb;
  38         int ret;
  39         bool keep;
  40         int i;
  41
  42         if (event_epoll_fd == -1)
  43                 event_epoll_fd = epoll_create(1);
  44
  45         while(true) {
  46                 ret = epoll_wait(event_epoll_fd, ev, 10, -1);
  47                 for(i = 0; i < ret; ++i) {
  48                         cb = ev[i].data.ptr;
  49                         keep = cb->callback(ev[i].events, cb->data);
  50                         if (!keep)
  51                                 event_unregister(cb->fd);
  52                 }
  53                 if (ret < 0)
  54                         printf("epoll: %d\n", errno);
  55         }
  56
  57         return 0;
  58 }