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Implement an NX interface to block flush message queues in multi-user mode. This is necessary to prevent stale window handles when a window is closed

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git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@4745 7fd9a85b-ad96-42d3-883c-3090e2eb8679
This commit is contained in:
patacongo
2012-05-17 22:16:02 +00:00
parent 7c97dbdf44
commit 3d0f071c60
20 changed files with 959 additions and 84 deletions
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nuttx/graphics/nxtk/Make.defs
+1 -1
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@@ -39,7 +39,7 @@ NXTKWIN_CSRCS = nxtk_openwindow.c nxtk_closewindow.c nxtk_getposition.c \
nxtk_fillwindow.c nxtk_getwindow.c nxtk_filltrapwindow.c \
nxtk_movewindow.c nxtk_bitmapwindow.c nxtk_events.c \
nxtk_setsubwindows.c nxtk_drawcirclewindow.c nxtk_drawlinewindow.c \
nxtk_fillcirclewindow.c
nxtk_fillcirclewindow.c nxtk_block.c
NXTKTB_CSRCS = nxtk_opentoolbar.c nxtk_closetoolbar.c nxtk_filltoolbar.c \
nxtk_gettoolbar.c nxtk_filltraptoolbar.c nxtk_movetoolbar.c \
nxtk_bitmaptoolbar.c nxtk_drawcircletoolbar.c nxtk_drawlinetoolbar.c \
nuttx/graphics/nxtk/nxtk_block.c
+107
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@@ -0,0 +1,107 @@
/****************************************************************************
* graphics/nxtk/nxtk_block.c
*
* Copyright (C) 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 <nuttx/nx/nx.h>
#include <nuttx/nx/nxtk.h>
#include "nxfe.h"
#ifdef CONFIG_NX_MULTIUSER
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: nxtk_block
*
* Description:
* This is callback will do to things: (1) any queue a 'blocked' callback
* to the window and then (2) block any further window messaging.
*
* The 'blocked' callback is the response from nx_block (or nxtk_block).
* Those blocking interfaces are used to assure that no further messages are
* are directed to the window. Receipt of the blocked callback signifies
* that (1) there are no further pending callbacks and (2) that the
* window is now 'defunct' and will receive no further callbacks.
*
* This callback supports coordinated destruction of a window in multi-
* user mode. In multi-use mode, the client window logic must stay
* intact until all of the queued callbacks are processed. Then the
* window may be safely closed. Closing the window prior with pending
* callbacks can lead to bad behavior when the callback is executed.
*
* Multiple user mode only!
*
* Input Parameters:
* hfwnd - The window to be blocked
*
* Return:
* OK on success; ERROR on failure with errno set appropriately
*
****************************************************************************/
int nxtk_block(NXTKWINDOW hfwnd)
{
return nx_block((NXWINDOW)hfwnd);
}
#endif /* CONFIG_NX_MULTIUSER */