Function cupsdAddSelect

scheduler/select.c:234–286

 */

int					/* O - 1 on success, 0 on error */
cupsdAddSelect(int             fd,	/* I - File descriptor */
               cupsd_selfunc_t read_cb,	/* I - Read callback */
               cupsd_selfunc_t write_cb,/* I - Write callback */
	       void            *data)	/* I - Data to pass to callback */
{
  _cupsd_fd_t	*fdptr;			/* File descriptor record */
#ifdef HAVE_EPOLL
  int		added;			/* 1 if added, 0 if modified */
#endif /* HAVE_EPOLL */


 /*
  * Range check input...
  */

  cupsdLogMessage(CUPSD_LOG_DEBUG2,
                  "cupsdAddSelect(fd=%d, read_cb=%p, write_cb=%p, data=%p)",
		  fd, read_cb, write_cb, data);

  if (fd < 0)
    return (0);

 /*
  * See if this FD has already been added...
  */

  if ((fdptr = find_fd(fd)) == NULL)
  {
   /*
    * No, add a new entry...
    */

    if ((fdptr = calloc(1, sizeof(_cupsd_fd_t))) == NULL)
      return (0);

    fdptr->fd  = fd;
    fdptr->use = 1;

    if (!cupsArrayAdd(cupsd_fds, fdptr))
    {
      cupsdLogMessage(CUPSD_LOG_EMERG, "Unable to add fd %d to array!", fd);
      free(fdptr);
      return (0);
    }

#ifdef HAVE_EPOLL
    added = 1;
  }
  else
    added = 0;
#else
  }
#endif /* HAVE_EPOLL */

#ifdef HAVE_KQUEUE