コード例 #1
0
ファイル: nxtk_openwindow.c プロジェクト: FreddieChopin/NuttX
NXTKWINDOW nxtk_openwindow(NXHANDLE handle,
                           FAR const struct nx_callback_s *cb,
                           FAR void *arg)
{
  FAR struct nxtk_framedwindow_s *fwnd;
  int ret;

#ifdef CONFIG_DEBUG
  if (!handle || !cb)
    {
      set_errno(EINVAL);
      return NULL;
    }
#endif

  /* Pre-allocate the window structure */

  fwnd = (FAR struct nxtk_framedwindow_s *)
    lib_uzalloc(sizeof(struct nxtk_framedwindow_s));

  if (!fwnd)
    {
      set_errno(ENOMEM);
      return NULL;
    }

  /* Initialize the window structure */

  fwnd->fwcb  = cb;
  fwnd->fwarg = arg;

  /* Then let nx_constructwindow do the rest */

  ret = nx_constructwindow(handle, (NXWINDOW)&fwnd->wnd, &g_nxtkcb, NULL);
  if (ret < 0)
    {
      /* An error occurred, the window has been freed */

      return NULL;
    }

  /* Return the initialized window reference */

  return (NXTKWINDOW)fwnd;
}
コード例 #2
0
ファイル: nx_connect.c プロジェクト: a1ien/nuttx
NXHANDLE nx_connectinstance(FAR const char *svrmqname)
{
  FAR struct nxfe_conn_s *conn;
  struct nxsvrmsg_s       outmsg;
  char                    climqname[NX_CLIENT_MXNAMELEN];
  struct mq_attr          attr;
  int                     ret;

  /* Sanity checking */

#ifdef CONFIG_DEBUG_FEATURES
  if (!svrmqname)
    {
      set_errno(EINVAL);
      return NULL;
    }
#endif

  /* Allocate the NX client structure */

  conn = (FAR struct nxfe_conn_s *)lib_uzalloc(sizeof(struct nxfe_conn_s));
  if (!conn)
    {
      set_errno(ENOMEM);
      goto errout;
    }

  /* Create the client MQ name */

  nxmu_semtake(&g_nxlibsem);
  conn->cid = g_nxcid++;
  nxmu_semgive(&g_nxlibsem);

  sprintf(climqname, NX_CLIENT_MQNAMEFMT, conn->cid);

  /* Open the client MQ for reading */

  attr.mq_maxmsg  = CONFIG_NX_MXCLIENTMSGS;
  attr.mq_msgsize = NX_MXCLIMSGLEN;
  attr.mq_flags   = 0;

#ifdef CONFIG_NX_BLOCKING
  conn->crdmq = mq_open(climqname, O_RDONLY|O_CREAT, 0666, &attr);
#else
  conn->crdmq = mq_open(climqname, O_RDONLY|O_CREAT|O_NONBLOCK, 0666, &attr);
#endif
  if (conn->crdmq == (mqd_t)-1)
    {
      gerr("ERROR: mq_open(%s) failed: %d\n", climqname, errno);
      goto errout_with_conn;
    }

  /* Open the server MQ for writing */

  attr.mq_maxmsg  = CONFIG_NX_MXSERVERMSGS;
  attr.mq_msgsize = NX_MXSVRMSGLEN;
  attr.mq_flags   = 0;

  conn->cwrmq = mq_open(svrmqname, O_WRONLY|O_CREAT, 0666, &attr);
  if (conn->cwrmq == (mqd_t)-1)
    {
      gerr("ERROR: mq_open(%s) failed: %d\n", svrmqname, errno);
      goto errout_with_rmq;
    }

  /* Inform the server that this client exists */

  outmsg.msgid = NX_SVRMSG_CONNECT;
  outmsg.conn  = conn;

  ret = nxmu_sendserver(conn, &outmsg, sizeof(struct nxsvrmsg_s));
  if (ret < 0)
    {
      gerr("ERROR: nxmu_sendserver failed: %d\n", errno);
      goto errout_with_wmq;
    }

#if 0
  /* Now read until we get a response to this message.  The server will
   * respond with either (1) NX_CLIMSG_CONNECTED, in which case the state
   * will change to NX_CLISTATE_CONNECTED, or (2) NX_CLIMSG_DISCONNECTED
   * in which case, nx_message will fail with errno = EHOSTDOWN.
   */

  do
    {
      ret = nx_eventhandler((NXHANDLE)conn);
      if (ret < 0)
        {
          gerr("ERROR: nx_message failed: %d\n", errno);
          goto errout_with_wmq;
        }
      usleep(300000);
    }
  while (conn->state != NX_CLISTATE_CONNECTED);
#endif
  return (NXHANDLE)conn;

errout_with_wmq:
  mq_close(conn->cwrmq);
errout_with_rmq:
  mq_close(conn->crdmq);
errout_with_conn:
  lib_ufree(conn);
errout:
  return NULL;
}