121 lines
4.5 KiB
C
121 lines
4.5 KiB
C
/****************************************************************************
|
|
* libnx/nxmu/nx_constsructwindow.c
|
|
*
|
|
* Copyright (C) 2008, 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 <stdlib.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_constructwindow
|
|
*
|
|
* Description:
|
|
* This function is the same a nx_openwindow EXCEPT that the client provides
|
|
* the window structure instance. nx_constructwindow will initialize the
|
|
* the pre-allocated window structure for use by NX. This function is
|
|
* provided in addition to nx_openwindow in order to support a kind of
|
|
* inheritance: The caller's window structure may include extensions that
|
|
* are not visible to NX.
|
|
*
|
|
* NOTE: hwnd must have been allocated using a user-space allocator that
|
|
* permits user access to the window. Once provided to nx_constructwindow()
|
|
* that memory is owned and managed by NX. On certain error conditions or
|
|
* when the window is closed, NX will free the window.
|
|
*
|
|
* Input Parameters:
|
|
* handle - The handle returned by nx_connect
|
|
* hwnd - The pre-allocated window structure.
|
|
* cb - Callbacks used to process window events
|
|
* arg - User provided value that will be returned with NX callbacks.
|
|
*
|
|
* Return:
|
|
* OK on success; ERROR on failure with errno set appropriately. In the
|
|
* case of ERROR, NX will have deallocated the pre-allocated window.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int nx_constructwindow(NXHANDLE handle, NXWINDOW hwnd,
|
|
FAR const struct nx_callback_s *cb, FAR void *arg)
|
|
{
|
|
FAR struct nxfe_conn_s *conn = (FAR struct nxfe_conn_s *)handle;
|
|
FAR struct nxbe_window_s *wnd = (FAR struct nxbe_window_s *)hwnd;
|
|
struct nxsvrmsg_openwindow_s outmsg;
|
|
|
|
#ifdef CONFIG_DEBUG_FEATURES
|
|
if (!wnd)
|
|
{
|
|
set_errno(EINVAL);
|
|
return ERROR;
|
|
}
|
|
|
|
if (!conn || !cb)
|
|
{
|
|
lib_ufree(wnd);
|
|
set_errno(EINVAL);
|
|
return ERROR;
|
|
}
|
|
#endif
|
|
|
|
/* Setup only the connection structure, callbacks and client private data
|
|
* reference. The server will set everything else up.
|
|
*/
|
|
|
|
wnd->conn = conn;
|
|
wnd->cb = cb;
|
|
wnd->arg = arg;
|
|
|
|
/* Request initialization the new window from the server */
|
|
|
|
outmsg.msgid = NX_SVRMSG_OPENWINDOW;
|
|
outmsg.wnd = wnd;
|
|
|
|
return nxmu_sendserver(conn, &outmsg, sizeof(struct nxsvrmsg_openwindow_s));
|
|
}
|