109 lines
4.6 KiB
C
109 lines
4.6 KiB
C
/****************************************************************************
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* libnx/nxtk/nxtk_block.c
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*
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* Copyright (C) 2012, 2013 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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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 <nuttx/nx/nx.h>
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#include <nuttx/nx/nxtk.h>
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#include <nuttx/nx/nxmu.h>
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#ifdef CONFIG_NX_MULTIUSER
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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: nxtk_block
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*
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* Description:
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* This is callback will do to things: (1) any queue a 'blocked' callback
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* to the window and then (2) block any further window messaging.
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*
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* The 'blocked' callback is the response from nx_block (or nxtk_block).
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* Those blocking interfaces are used to assure that no further messages are
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* are directed to the window. Receipt of the blocked callback signifies
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* that (1) there are no further pending callbacks and (2) that the
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* window is now 'defunct' and will receive no further callbacks.
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*
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* This callback supports coordinated destruction of a window in multi-
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* user mode. In multi-use mode, the client window logic must stay
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* intact until all of the queued callbacks are processed. Then the
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* window may be safely closed. Closing the window prior with pending
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* callbacks can lead to bad behavior when the callback is executed.
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*
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* Multiple user mode only!
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*
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* Input Parameters:
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* hfwnd - The window to be blocked
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* arg - An argument that will accompany the block messages (This is arg2
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* in the blocked callback).
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*
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* Return:
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* OK on success; ERROR on failure with errno set appropriately
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*
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****************************************************************************/
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int nxtk_block(NXTKWINDOW hfwnd, FAR void *arg)
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{
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return nx_block((NXWINDOW)hfwnd, arg);
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}
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#endif /* CONFIG_NX_MULTIUSER */
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