/****************************************************************************
* graphics/nxmu/nx_openwindow.c
*
* Copyright (C) 2008, 2011 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/nx.h>
#include "nxfe.h"
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: nxfe_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_open window in order to support a kind of
* inheritance: The caller's window structure may include extensions that
* are not visible to NX.
*
* NOTE: wnd must have been allocated using malloc() (or related allocators)
* Once provided to nxfe_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
* wnd - 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 dealloated the pre-allocated window.
*
****************************************************************************/
int nxfe_constructwindow(NXHANDLE handle, FAR struct nxbe_window_s *wnd,
FAR const struct nx_callback_s *cb, FAR void *arg)
{
FAR struct nxfe_conn_s *conn = (FAR struct nxfe_conn_s *)handle;
struct nxsvrmsg_openwindow_s outmsg;
int ret;
#ifdef CONFIG_DEBUG
if (!wnd)
{
errno = EINVAL;
return ERROR;
}
if (!conn || !cb)
{
free(wnd);
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;
ret = mq_send(conn->cwrmq, &outmsg, sizeof(struct nxsvrmsg_openwindow_s), NX_SVRMSG_PRIO);
if (ret < 0)
{
gdbg("mq_send failed: %d\n", errno);
free(wnd);
return ERROR;
}
return OK;
}
