Function _httpWait

cups/http.c:3038–3118

 */

int					/* O - 1 if data is available, 0 otherwise */
_httpWait(http_t *http,			/* I - HTTP connection */
          int    msec,			/* I - Milliseconds to wait */
	  int    usessl)		/* I - Use SSL context? */
{
#ifdef HAVE_POLL
  struct pollfd		pfd;		/* Polled file descriptor */
#else
  fd_set		input_set;	/* select() input set */
  struct timeval	timeout;	/* Timeout */
#endif /* HAVE_POLL */
  int			nfds;		/* Result from select()/poll() */


  DEBUG_printf(("4_httpWait(http=%p, msec=%d, usessl=%d)", (void *)http, msec, usessl));

  if (http->fd < 0)
  {
    DEBUG_printf(("5_httpWait: Returning 0 since fd=%d", http->fd));
    return (0);
  }

 /*
  * Check the SSL/TLS buffers for data first...
  */

#ifdef HAVE_TLS
  if (usessl && http->tls && _httpTLSPending(http))
  {
    DEBUG_puts("5_httpWait: Return 1 since there is pending TLS data.");
    return (1);
  }
#endif /* HAVE_TLS */

 /*
  * Then try doing a select() or poll() to poll the socket...
  */

#ifdef HAVE_POLL
  pfd.fd     = http->fd;
  pfd.events = POLLIN;

  do
  {
    nfds = poll(&pfd, 1, msec);
  }
  while (nfds < 0 && (errno == EINTR || errno == EAGAIN));

#else
  do
  {
    FD_ZERO(&input_set);
    FD_SET(http->fd, &input_set);

    DEBUG_printf(("6_httpWait: msec=%d, http->fd=%d", msec, http->fd));

    if (msec >= 0)
    {