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- /****************************************************************************
- * libs/libnx/nxmu/nx_openwindow.c
- *
- * Copyright (C) 2008-2009, 2011-2013 Gregory Nutt. All rights reserved.
- * Author: Gregory Nutt <gnutt@nuttx.org>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * 3. Neither the name NuttX nor the names of its contributors may be
- * used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- ****************************************************************************/
- /****************************************************************************
- * Included Files
- ****************************************************************************/
- #include <nuttx/config.h>
- #include <errno.h>
- #include <debug.h>
- #include <nuttx/nx/nx.h>
- #include <nuttx/nx/nxbe.h>
- #include <nuttx/nx/nxmu.h>
- #include "nxcontext.h"
- /****************************************************************************
- * Public Functions
- ****************************************************************************/
- /****************************************************************************
- * Name: nx_openwindow
- *
- * Description:
- * Create a new window.
- *
- * Input Parameters:
- * handle - The handle returned by nx_connect
- * cb - Callbacks used to process window events
- * arg - User provided value that will be returned with NX callbacks.
- *
- * Returned Value:
- * Success: A non-NULL handle used with subsequent NX accesses
- * Failure: NULL is returned and errno is set appropriately
- *
- ****************************************************************************/
- NXWINDOW nx_openwindow(NXHANDLE handle, FAR const struct nx_callback_s *cb,
- FAR void *arg)
- {
- FAR struct nxbe_window_s *wnd;
- int ret;
- #ifdef CONFIG_DEBUG_FEATURES
- if (!handle || !cb)
- {
- set_errno(EINVAL);
- return NULL;
- }
- #endif
- /* Pre-allocate the window structure */
- wnd = (FAR struct nxbe_window_s *)lib_uzalloc(sizeof(struct nxbe_window_s));
- if (!wnd)
- {
- set_errno(ENOMEM);
- return NULL;
- }
- /* Then let nx_constructwindow do the rest */
- ret = nx_constructwindow(handle, (NXWINDOW)wnd, cb, arg);
- if (ret < 0)
- {
- /* An error occurred, the window has been freed */
- return NULL;
- }
- /* Return the uninitialized window reference. Since the server
- * serializes all operations, we can be assured that the window will
- * be initialized before the first operation on the window.
- */
- return (NXWINDOW)wnd;
- }
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