text: /****************************************************************************
   * libnx/nxmu/nx_getposition.c
   *
   *   Copyright (C) 2008-2009, 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 <errno.h>
  #include <debug.h>
  
  #include <nuttx/nx/nx.h>
  #include <nuttx/nx/nxbe.h>
  #include <nuttx/nx/nxmu.h>
  
  /****************************************************************************
   * Public Functions
   ****************************************************************************/
  
  /****************************************************************************
   * Name: nx_getposition
   *
   * Description:
   *  Request the position and size information for the selected window.  The
   *  values will be return asynchronously through the client callback function
   *  pointer.
   *
   * Input Parameters:
   *   hwnd   - The window handle
   *
   * Return:
   *   OK on success; ERROR on failure with errno set appropriately
   *
   ****************************************************************************/
  
  int nx_getposition(NXWINDOW hwnd)
  {
    FAR struct nxbe_window_s     *wnd = (FAR struct nxbe_window_s *)hwnd;
    struct nxsvrmsg_getposition_s outmsg;
  
  #ifdef CONFIG_DEBUG_FEATURES
    if (!wnd)
      {
        set_errno(EINVAL);
        return ERROR;
      }
  #endif
  
    /* Request the size/position info.
     *
     * It is tempting to just take the positional information from the window
     * structure that we have in our hands now.  However, we need to run this through
     * the server to keep things serialized.  There might, for example, be a pending
     * size/position change and, in that case, this function would return the
     * wrong info.
     */
  
    outmsg.msgid = NX_SVRMSG_GETPOSITION;
    outmsg.wnd   = wnd;
  
    return nxmu_sendwindow(wnd, &outmsg, sizeof(struct nxsvrmsg_getposition_s));
  }
  