diff options
Diffstat (limited to 'nuttx/graphics/nxmu/nx_openwindow.c')
-rw-r--r-- | nuttx/graphics/nxmu/nx_openwindow.c | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/nuttx/graphics/nxmu/nx_openwindow.c b/nuttx/graphics/nxmu/nx_openwindow.c new file mode 100644 index 000000000..2975e365a --- /dev/null +++ b/nuttx/graphics/nxmu/nx_openwindow.c @@ -0,0 +1,131 @@ +/**************************************************************************** + * graphics/nxmu/nx_openwindow.c + * + * Copyright (C) 2008-2009, 2011-2012 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/kmalloc.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 *)kzalloc(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; +} + |