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/****************************************************************************
* graphics/nxmu/nx_openwindow.c
*
* Copyright (C) 2008-2009 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* 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 <stdlib.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/nx.h>
#include "nxfe.h"
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: nx_openwindow
*
* Description:
* Create a new window.
*
* Input Parameters:
* handle - The handle returned by nx_connect
* cb - Callbacks used to process windo events
* arg - User provided value that will be returned with NX callbacks.
*
* Return:
* 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
if (!handle || !cb)
{
errno = EINVAL;
return NULL;
}
#endif
/* Pre-allocate the window structure */
wnd = (FAR struct nxbe_window_s *)zalloc(sizeof(struct nxbe_window_s));
if (!wnd)
{
errno = ENOMEM;
return NULL;
}
/* Then let nxfe_constructwindow do the rest */
ret = nxfe_constructwindow(handle, 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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