43d77227a0
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1325 42af7a65-404d-4744-a932-0658087f49c3
128 lines
4.6 KiB
C
128 lines
4.6 KiB
C
/****************************************************************************
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* graphics/nxmu/nx_openwindow.c
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*
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* Copyright (C) 2008 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/nx.h>
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#include "nxfe.h"
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/****************************************************************************
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* Pre-Processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: nx_openwindow
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*
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* Description:
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* Create a new window.
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*
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* Input Parameters:
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* handle - The handle returned by nx_connect
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* wnd - Location to return the handle of the new window
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*
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* Return:
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* Success: A non-NULL handle used with subsequent NX accesses
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* Failure: NULL is returned and errno is set appropriately
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*
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****************************************************************************/
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NXWINDOW nx_openwindow(NXHANDLE handle)
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{
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FAR struct nxfe_conn_s *conn = (FAR struct nxfe_conn_s *)handle;
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FAR struct nxbe_window_s *wnd;
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struct nxsvrmsg_openwindow_s outmsg;
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int ret;
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/* Pre-allocate the window structure */
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wnd = (FAR struct nxbe_window_s *)zalloc(sizeof(struct nxbe_window_s));
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if (!wnd)
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{
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errno = ENOMEM;
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return NULL;
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}
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/* Request initialization the new window from the server */
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outmsg.msgid = NX_SVRMSG_OPENWINDOW;
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outmsg.conn = conn;
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outmsg.wnd = wnd;
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ret = mq_send(conn->cwrmq, &outmsg, sizeof(struct nxsvrmsg_openwindow_s), NX_SVRMSG_PRIO);
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if (ret < 0)
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{
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gdbg("mq_send failed: %d\n", errno);
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free(wnd);
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return NULL;
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}
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/* Return the uninitialized window reference. Since the server
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* serializes all operations, we can be assured that the window will
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* be initialized before the first operation on the window.
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*/
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return (NXWINDOW)wnd;
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}
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